:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --ink: #172033;
  --muted: #6b7280;
  --line: #dce4ef;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --soft-blue: #eaf1ff;
  --green: #15803d;
  --green-bg: #dcfce7;
  --red: #b91c1c;
  --red-bg: #fee2e2;
  --shadow: 0 18px 45px rgba(25, 44, 78, .08);
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif; background: radial-gradient(circle at top left, #e8f0ff, transparent 35%), var(--bg); color: var(--ink); }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
.topbar { min-height: 72px; padding: 0 max(24px, calc((100vw - 1120px) / 2)); display: flex; align-items: center; justify-content: space-between; gap: 24px; background: rgba(255,255,255,.88); border-bottom: 1px solid var(--line); backdrop-filter: blur(16px); position: sticky; top: 0; z-index: 20; }
.brand { display: flex; align-items: center; gap: 14px; flex: 0 0 auto; font-weight: 850; }
.brand-logo { display: block; width: 176px; height: 54px; object-fit: contain; }
.brand-app-name { padding-left: 14px; border-left: 1px solid var(--line); white-space: nowrap; }
nav { display: flex; gap: 22px; color: #475569; font-size: 14px; font-weight: 700; }
nav a:hover { color: var(--primary); }
.page-shell { width: min(1120px, 92%); margin: 34px auto 60px; }
.footer { padding: 26px; text-align: center; color: var(--muted); font-size: 13px; }
.card { background: var(--card); border: 1px solid rgba(210, 220, 234, .9); border-radius: 22px; box-shadow: var(--shadow); }
.hero { display: grid; grid-template-columns: 1.25fr .75fr; gap: 44px; align-items: center; padding: 56px; }
.hero h1, .dashboard-heading h1, .study-topline h1 { margin: 8px 0 14px; font-size: clamp(32px, 5vw, 52px); line-height: 1.08; letter-spacing: -.04em; }
.hero p, .dashboard-heading p, .study-topline p { color: var(--muted); font-size: 17px; line-height: 1.75; }
.eyebrow { color: var(--primary); font-size: 12px; font-weight: 900; letter-spacing: .16em; }
.profile-panel { padding: 28px; background: #f8faff; border: 1px solid var(--line); border-radius: 18px; }
.profile-panel h2, .start-card h2, .instruction-card h2 { margin-top: 0; }
.stack-form { display: grid; gap: 14px; }
label { font-weight: 750; font-size: 14px; color: #334155; }
input, select { width: 100%; border: 1.5px solid var(--line); border-radius: 12px; padding: 13px 14px; background: white; outline: none; }
input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(37, 99, 235, .1); }
.button { display: inline-flex; justify-content: center; align-items: center; border: none; border-radius: 12px; padding: 12px 18px; font-weight: 850; cursor: pointer; transition: transform .15s, background .15s; }
.button:hover { transform: translateY(-1px); }
.button.primary { color: white; background: var(--primary); }
.button.primary:hover { background: var(--primary-dark); }
.button.secondary { background: #edf2f8; color: #334155; }
.button.dark { background: #172033; color: white; }
.button.ghost { background: white; border: 1px solid var(--line); color: #475569; }
.button.danger { color: #b91c1c; background: #fee2e2; border: 1px solid #fecaca; }
.button.danger:hover { color: white; background: #b91c1c; }
.button.large { padding: 15px 20px; font-size: 16px; }
.existing-profiles { margin-top: 22px; border-top: 1px solid var(--line); padding-top: 16px; }
.existing-profiles p { margin: 0 0 10px; font-size: 13px; }
.existing-profiles form { display: inline; }
.profile-chip { border: 1px solid #bfdbfe; border-radius: 999px; background: var(--soft-blue); color: #1e40af; padding: 8px 12px; margin: 3px; cursor: pointer; }
.three-column { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 18px; }
.feature { padding: 26px; display: grid; gap: 8px; }
.feature strong { font-size: 24px; }
.feature span { color: var(--muted); }
.dashboard-heading, .study-topline { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 26px; }
.dashboard-heading h1, .study-topline h1 { font-size: clamp(30px, 4vw, 45px); }
.dashboard-heading p { margin: 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.stats-grid.three { grid-template-columns: repeat(3, 1fr); }
.stat { padding: 22px; }
.stat span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 10px; }
.stat strong { font-size: 28px; }
.stat .date-value { font-size: 17px; }
.continue-banner { padding: 24px 28px; display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 20px; border-left: 5px solid var(--primary); }
.continue-banner h2 { margin: 5px 0; }
.continue-banner p { color: var(--muted); margin: 0; }
.content-grid { display: grid; grid-template-columns: 1.65fr .8fr; gap: 18px; }
.start-card { padding: 30px; }
.form-row { display: grid; gap: 8px; }
.form-row.two { grid-template-columns: 1fr 1fr; gap: 14px; }
.side-stack { display: grid; gap: 14px; align-content: start; }
.mini-card { padding: 20px; display: flex; align-items: center; gap: 16px; }
.mini-card strong { font-size: 19px; }
.mini-card p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.mini-icon { width: 42px; height: 42px; border-radius: 13px; display: grid; place-items: center; background: var(--soft-blue); color: var(--primary); font-size: 20px; }
.manage-link { padding: 20px; color: var(--primary); font-weight: 850; }
.flash { padding: 14px 18px; border-radius: 13px; margin-bottom: 18px; font-weight: 700; }
.flash.success { color: #166534; background: #dcfce7; border: 1px solid #bbf7d0; }
.flash.warning { color: #92400e; background: #fef3c7; border: 1px solid #fde68a; }
.warning-box { padding: 22px; margin-top: 20px; background: #fffaf0; }
.warning-box h3 { margin-top: 0; color: #92400e; }
.warning-box p { margin-bottom: 4px; color: #78350f; }
.study-layout { width: min(820px, 100%); margin: 0 auto; }
.progress-line { margin: 20px 0; }
.progress-meta { display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; margin-bottom: 8px; }
.progress-track { height: 10px; background: #dfe7f1; border-radius: 999px; overflow: hidden; }
.progress-track div { height: 100%; background: linear-gradient(90deg, #2563eb, #60a5fa); border-radius: inherit; }
.question-card { padding: 42px; text-align: center; }
.question-label { color: var(--muted); font-size: 14px; }
.question-card h2 { font-size: clamp(38px, 7vw, 64px); margin: 15px 0; letter-spacing: -.04em; }
.pos-badge { display: inline-flex; padding: 7px 12px; border-radius: 999px; background: #ede9fe; color: #6d28d9; font-weight: 850; }
.pos-badge.small { padding: 5px 9px; font-size: 12px; }
.answer-block { width: min(610px, 100%); margin: 34px auto 0; display: grid; gap: 12px; }
.answer-block label { text-align: left; }
.answer-block input { font-size: 23px; text-align: center; padding: 16px; }
.study-actions { display: grid; grid-template-columns: 1.25fr 1fr 1fr; gap: 10px; }
.feedback-box { width: min(610px, 100%); margin: 24px auto 0; border-radius: 16px; padding: 19px; text-align: left; }
.feedback-box.correct { background: var(--green-bg); color: #14532d; }
.feedback-box.wrong { background: var(--red-bg); color: #7f1d1d; }
.feedback-box h3 { margin: 0 0 8px; }
.feedback-box p { margin: 7px 0; }
.feedback-box .example { font-style: italic; line-height: 1.55; }
.speak-button { border: 0; border-radius: 10px; padding: 9px 12px; margin-top: 8px; background: white; cursor: pointer; font-weight: 750; }
.hidden { display: none !important; }
.inline-error { min-height: 20px; color: var(--red); font-weight: 700; }
.keyboard-hint { color: var(--muted); font-size: 12px; }
.result-wrap, .settings-wrap { width: min(800px, 100%); margin: 0 auto; }
.result-card { padding: 52px; text-align: center; }
.result-emoji { display: grid; place-items: center; width: 70px; height: 70px; border-radius: 50%; margin: 0 auto 18px; color: white; background: var(--green); font-size: 34px; }
.result-card h1 { font-size: 42px; margin: 10px 0; }
.result-card > p { color: var(--muted); }
.result-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 34px 0; }
.result-stats div { background: #f6f8fc; border-radius: 14px; padding: 18px 8px; }
.result-stats strong { display: block; font-size: 25px; }
.result-stats span { color: var(--muted); font-size: 12px; }
.button-row { display: flex; justify-content: center; gap: 10px; }
.table-card, .instruction-card { padding: 26px; }
.table-card h2 { margin-top: 0; }
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { padding: 14px 12px; border-bottom: 1px solid var(--line); text-align: left; font-size: 14px; }
th { color: #475569; background: #f8fafc; }
.text-button { border: 0; background: transparent; color: var(--red); font-weight: 800; cursor: pointer; }
.empty-state { padding: 50px 20px; text-align: center; color: var(--muted); }
.settings-card { padding: 30px; display: grid; gap: 17px; }
.toggle-row { display: flex; align-items: flex-start; gap: 12px; padding: 16px; border: 1px solid var(--line); border-radius: 14px; cursor: pointer; }
.toggle-row input { width: auto; margin-top: 4px; }
.toggle-row span { display: grid; gap: 4px; }
.toggle-row small { color: var(--muted); font-weight: 500; }
.instruction-card ol { color: #475569; line-height: 1.8; }
.path-text { overflow-wrap: anywhere; color: var(--muted); }
code { background: #eef2f7; padding: 2px 6px; border-radius: 6px; }
.status { padding: 5px 9px; border-radius: 999px; font-size: 12px; font-weight: 800; }
.status.active { color: #166534; background: #dcfce7; }
.status.inactive { color: #991b1b; background: #fee2e2; }
@media (max-width: 820px) {
  .topbar { padding: 12px 4%; align-items: flex-start; flex-direction: column; }
  .brand-logo { width: 158px; height: 48px; }
  nav { width: 100%; overflow-x: auto; padding-bottom: 4px; }
  .hero, .content-grid { grid-template-columns: 1fr; }
  .hero { padding: 30px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-heading, .study-topline, .continue-banner { align-items: flex-start; flex-direction: column; }
  .question-card { padding: 28px 20px; }
  .result-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .page-shell { width: 94%; margin-top: 22px; }
  .brand { width: 100%; }
  .brand-app-name { margin-left: auto; font-size: 14px; }
  .three-column, .stats-grid, .stats-grid.three, .form-row.two { grid-template-columns: 1fr; }
  .study-actions { grid-template-columns: 1fr; }
  .result-card { padding: 30px 18px; }
  .button-row { flex-direction: column; }
}
.field-help {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.alphabet-options {
  padding: 16px;
  border: 1px solid #bfdbfe;
  border-radius: 15px;
  background: #f5f9ff;
}
.restart-choice {
  min-height: 52px;
  padding: 13px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  background: white;
  cursor: pointer;
}
.restart-choice input {
  width: auto;
  margin: 0;
  accent-color: var(--primary);
}
.preview-layout {
  width: min(920px, 100%);
  margin: 0 auto;
}
.preview-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 20px;
  margin-bottom: 18px;
}
.preview-summary div {
  padding: 14px;
  border-radius: 14px;
  background: #f6f8fc;
}
.preview-summary span {
  display: block;
  margin-bottom: 7px;
  color: var(--muted);
  font-size: 12px;
}
.preview-summary strong {
  font-size: 20px;
}
.preview-card {
  padding: 28px;
}
.preview-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.preview-heading h2 {
  margin: 6px 0 0;
}
.preview-heading p,
.preview-actions p {
  color: var(--muted);
}
.memory-list {
  display: grid;
  gap: 10px;
  margin: 20px 0 26px;
}
.memory-word {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto auto;
  gap: 13px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fbfdff;
}
.memory-number {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  color: var(--primary);
  background: var(--soft-blue);
  font-weight: 850;
}
.memory-main {
  display: grid;
  gap: 4px;
}
.memory-main strong {
  font-size: 21px;
  letter-spacing: .01em;
}
.memory-main span {
  color: var(--muted);
  font-size: 14px;
}
.preview-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.preview-actions p {
  margin: 0;
  line-height: 1.6;
}
.button-row form {
  margin: 0;
}
@media (max-width: 680px) {
  .preview-summary {
    grid-template-columns: 1fr;
  }
  .preview-heading,
  .preview-actions {
    align-items: flex-start;
    flex-direction: column;
  }
  .memory-word {
    grid-template-columns: 34px minmax(0, 1fr) auto;
  }
  .memory-word .preview-speak {
    grid-column: 2 / -1;
    justify-self: start;
  }
}

/* Student portal and separated administrator console */
.nav-form { margin: 0; display: inline-flex; }
.nav-form button { border: 0; padding: 0; background: transparent; color: #475569; font-weight: 700; cursor: pointer; }
.nav-form button:hover { color: var(--primary); }
.login-layout { min-height: 620px; display: grid; grid-template-columns: 1.15fr .7fr; gap: 56px; align-items: center; }
.login-intro h1 { margin: 12px 0 20px; font-size: clamp(42px, 6vw, 68px); line-height: 1.05; letter-spacing: -.05em; }
.login-intro > p { max-width: 660px; color: var(--muted); font-size: 18px; line-height: 1.8; }
.login-feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 32px; }
.login-feature-grid div { padding: 18px; border: 1px solid #cbdcf7; border-radius: 17px; background: rgba(255,255,255,.62); }
.login-feature-grid strong { display: block; font-size: 22px; }
.login-feature-grid span { color: var(--muted); font-size: 12px; }
.login-card { padding: 34px; }
.login-card h1, .login-card h2 { margin: 12px 0 8px; }
.login-card > p { margin: 0 0 24px; color: var(--muted); line-height: 1.65; }
.login-icon { display: grid; place-items: center; width: 54px; height: 54px; border-radius: 17px; background: var(--soft-blue); color: var(--primary); font-size: 25px; }
.login-icon.admin { background: #eef2f7; color: #172033; }
.login-help { display: block; margin-top: 18px; color: var(--muted); line-height: 1.6; }
.single-login-wrap { min-height: 600px; display: grid; place-items: center; }
.admin-login-card { width: min(460px, 100%); }
.back-link { display: inline-block; margin-top: 22px; color: var(--primary); font-weight: 750; }
.student-account-chip { padding: 12px 17px; border: 1px solid var(--line); border-radius: 14px; background: white; }
.student-account-chip span { display: block; color: var(--muted); font-size: 11px; }
.student-account-chip strong { font-size: 15px; }
.student-action-card { padding: 20px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 16px; }
.student-action-card strong { font-size: 18px; }
.student-action-card p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.action-arrow { color: var(--primary); font-size: 22px; }
.stat small { display: block; margin-top: 7px; color: var(--muted); }
.admin-grid { display: grid; grid-template-columns: 1.55fr .65fr; gap: 18px; }
.section-title-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.section-title-row h2 { margin: 5px 0 0; }
.section-title-row > a { color: var(--primary); font-weight: 800; }
.compact-table td:first-child { display: grid; gap: 3px; }
.compact-table td small { color: var(--muted); }
.admin-quick-card { padding: 22px; display: flex; align-items: center; gap: 15px; }
.admin-quick-card > span { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 14px; background: #eef2f7; font-size: 20px; }
.admin-quick-card strong { font-size: 18px; }
.admin-quick-card p { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.admin-student-layout { display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 18px; align-items: start; }
.account-create-card { padding: 26px; position: sticky; top: 102px; }
.account-create-card h2 { margin: 6px 0 4px; }
.account-table-card { padding: 24px; }
.student-account-list { display: grid; }
.student-account-row { display: grid; grid-template-columns: auto minmax(180px, 1fr) minmax(300px, auto); gap: 16px; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--line); }
.student-account-row:last-child { border-bottom: 0; }
.student-avatar { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 15px; background: var(--soft-blue); color: var(--primary); font-size: 19px; font-weight: 900; }
.student-main-info { display: grid; gap: 4px; }
.student-main-info span, .student-main-info small { color: var(--muted); }
.student-account-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; align-items: center; gap: 8px; }
.inline-reset-form { display: flex; gap: 7px; }
.inline-reset-form input { width: 155px; padding: 10px 11px; }
.inline-reset-form .button, .student-account-actions .button { padding: 10px 12px; font-size: 12px; }
.settings-wrap { width: min(1000px, 100%); }
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

@media (max-width: 900px) {
  .login-layout, .admin-grid, .admin-student-layout, .settings-grid { grid-template-columns: 1fr; }
  .login-layout { gap: 28px; }
  .account-create-card { position: static; }
  .student-account-row { grid-template-columns: auto 1fr; }
  .student-account-actions { grid-column: 1 / -1; justify-content: flex-start; padding-left: 62px; }
}
@media (max-width: 600px) {
  .login-feature-grid { grid-template-columns: 1fr; }
  .login-intro h1 { font-size: 42px; }
  .login-card { padding: 26px 20px; }
  .student-account-actions { padding-left: 0; }
  .inline-reset-form { width: 100%; flex-direction: column; }
  .inline-reset-form input { width: 100%; }
  .student-account-row { grid-template-columns: 1fr; }
  .student-avatar { display: none; }
}

/* Compact mobile study header and always-visible Chinese prompt */
.nav-label-short { display: none; }

@media (max-width: 820px) {
  .topbar {
    min-height: 56px;
    padding: 6px 3%;
    align-items: center;
    flex-direction: row;
    gap: 8px;
  }
  .brand { width: auto; min-width: 0; gap: 0; }
  .brand-logo { width: 104px; height: 40px; }
  .brand-app-name { display: none; }
  nav {
    width: auto;
    margin-left: auto;
    padding: 0;
    gap: 4px;
    align-items: center;
    flex-wrap: nowrap;
    overflow: visible;
    white-space: nowrap;
  }
  nav a,
  .nav-form button {
    display: inline-flex;
    min-height: 34px;
    padding: 6px 7px;
    align-items: center;
    justify-content: center;
    border-radius: 9px;
    background: #f4f7fb;
    font-size: 12px;
    line-height: 1;
  }
  .nav-label-long { display: none; }
  .nav-label-short { display: inline; }
  .page-shell { margin-top: 16px; }

  .study-topline { display: none; }
  .study-layout { width: 100%; }
  .progress-line { margin: 6px 2px 10px; }
  .question-card { padding: 16px 14px 18px; overflow: visible; }
  .question-prompt {
    position: sticky;
    top: 56px;
    z-index: 8;
    margin: -16px -14px 0;
    padding: 12px 14px 10px;
    border-bottom: 1px solid var(--line);
    border-radius: 20px 20px 0 0;
    background: white;
  }
  .question-card h2 {
    margin: 5px 0 7px;
    font-size: clamp(30px, 9vw, 42px);
    line-height: 1.15;
  }
  .question-label { font-size: 12px; }
  .pos-badge { padding: 5px 10px; font-size: 13px; }
  .answer-block { margin-top: 14px; gap: 9px; }
  .answer-block label { font-size: 13px; }
  .answer-block input { padding: 13px; font-size: 20px; }
  .study-actions { gap: 8px; }
  .study-actions .button { padding: 12px 10px; }
  .keyboard-hint { margin-bottom: 0; }
}

@media (max-width: 390px) {
  .topbar { padding-inline: 2.5%; gap: 5px; }
  .brand-logo { width: 88px; height: 34px; }
  nav { gap: 2px; }
  nav a,
  .nav-form button { min-height: 32px; padding: 5px 6px; font-size: 11px; }
}

/* Mobile dictation focus mode: no logo or navigation, only save and return. */
@media (max-width: 820px) {
  body.study-focus .topbar { display: none; }
  body.study-focus .page-shell { margin-top: 8px; }
  body.study-focus .study-topline {
    display: flex;
    margin: 0 0 8px;
    align-items: center;
    justify-content: flex-end;
    flex-direction: row;
  }
  body.study-focus .study-topline > div { display: none; }
  body.study-focus .study-topline .button {
    padding: 8px 12px;
    border-radius: 10px;
    font-size: 13px;
  }
  body.study-focus .question-prompt { top: 0; }
}

/* Verb-form and collocation practice */
.learning-section-title { margin-top: 28px; }
.section-note { color: var(--muted); font-size: 13px; }
.practice-feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 28px; }
.practice-feature { min-height: 250px; padding: 28px; display: grid; grid-template-columns: auto 1fr; grid-template-rows: 1fr auto; gap: 18px; align-items: start; }
.practice-feature > .button { grid-column: 1 / -1; }
.practice-feature-actions { grid-column: 1 / -1; display: grid; grid-template-columns: .85fr 1.15fr; gap: 10px; }
.heading-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px; }
.material-button::before { content: "▣"; margin-right: 7px; font-size: 12px; }
.practice-feature-icon { display: grid; place-items: center; width: 56px; height: 56px; border-radius: 18px; color: #1d4ed8; background: #dbeafe; font-size: 20px; font-weight: 900; }
.phrase-feature .practice-feature-icon { color: #7c2d12; background: #ffedd5; }
.practice-feature-copy h2 { margin: 5px 0 9px; font-size: 22px; }
.practice-feature-copy > p { min-height: 44px; margin: 0; color: var(--muted); line-height: 1.55; }
.practice-feature-stats { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 17px; }
.practice-feature-stats span { padding: 7px 10px; border-radius: 999px; color: #475569; background: #f1f5f9; font-size: 12px; }
.practice-feature-stats strong { color: var(--ink); font-size: 14px; }
.practice-start-grid { display: grid; grid-template-columns: 1.4fr .8fr; gap: 18px; align-items: start; }
.instruction-mini-card { padding: 20px; display: flex; align-items: flex-start; gap: 16px; }
.instruction-mini-card strong { font-size: 17px; }
.instruction-mini-card p { margin: 5px 0 0; color: var(--muted); font-size: 13px; line-height: 1.55; }
.practice-question-card .question-prompt h2 { font-size: clamp(32px, 5.4vw, 50px); line-height: 1.15; }
.verb-base-line { display: inline-flex; align-items: center; gap: 10px; padding: 8px 13px; border-radius: 999px; color: #475569; background: #eef2ff; }
.verb-base-line span { font-size: 12px; }
.verb-base-line strong { color: #3730a3; font-size: 19px; }
.verb-answer-block { width: min(680px, 100%); }
.verb-input-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; text-align: left; }
.verb-input-grid > div { display: grid; gap: 8px; align-content: start; }
.no-participle { min-height: 59px; display: grid; place-items: center; padding: 13px; border: 1.5px dashed #cbd5e1; border-radius: 12px; color: #64748b; background: #f8fafc; font-weight: 800; }
.practice-note { padding-top: 8px; border-top: 1px solid currentColor; font-size: 13px; opacity: .88; }

/* Junior eight-tenses entry */
.junior-grammar-card {
  margin: 0 0 28px;
  padding: 28px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 22px;
  align-items: center;
  border-top: 5px solid #2563eb;
  overflow: hidden;
}
.junior-grammar-icon {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  border-radius: 22px;
  color: white;
  background: linear-gradient(135deg, #2563eb, #0ea5e9);
  box-shadow: 0 12px 28px rgba(37, 99, 235, .2);
  font-size: 23px;
  font-weight: 950;
}
.junior-grammar-copy h2 { margin: 5px 0 8px; font-size: 27px; }
.junior-grammar-copy > p { max-width: 820px; margin: 0; color: var(--muted); line-height: 1.65; }
.junior-grammar-points { margin-top: 14px; }
.junior-grammar-points span { color: #1d4ed8; background: #dbeafe; }
.junior-progress-line { width: fit-content; margin-top: 12px; color: #1d4ed8; background: #eff6ff; }
.junior-grammar-actions { min-width: 190px; display: grid; gap: 9px; }

@media (max-width: 900px) {
  .practice-start-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .practice-feature-grid { grid-template-columns: 1fr; }
  .practice-feature { min-height: 0; }
}

@media (max-width: 560px) {
  .practice-feature-actions { grid-template-columns: 1fr; }
  .practice-feature { padding: 22px 18px; grid-template-columns: 46px 1fr; gap: 14px; }
  .practice-feature-icon { width: 46px; height: 46px; border-radius: 14px; font-size: 16px; }
  .practice-feature-copy h2 { font-size: 19px; }
  .practice-feature-copy > p { min-height: 0; }
  .verb-input-grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .heading-actions { width: 100%; justify-content: stretch; }
  .heading-actions .button { flex: 1 1 150px; }
  body.study-focus .footer { display: none; }
  body.practice-focus .practice-question-card .question-prompt h2 { font-size: clamp(28px, 8vw, 38px); }
  body.practice-focus .verb-base-line { padding: 6px 10px; }
  body.practice-focus .verb-base-line strong { font-size: 17px; }
}

/* Primary / junior course hub */
.module-welcome { margin-bottom: 18px; }
.module-quick-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}
.module-quick-stats > span {
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #64748b;
  background: rgba(255, 255, 255, .75);
  font-size: 13px;
}
.module-quick-stats strong { color: var(--ink); }
.module-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.module-card {
  position: relative;
  min-height: 510px;
  padding: 34px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.module-card::before {
  position: absolute;
  width: 280px;
  height: 280px;
  top: -150px;
  right: -120px;
  border-radius: 50%;
  content: "";
}
.primary-module { border-top: 5px solid #7c3aed; }
.primary-module::before { background: rgba(124, 58, 237, .08); }
.junior-module { border-top: 5px solid #2563eb; }
.junior-module::before { background: rgba(37, 99, 235, .08); }
.module-card-topline { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.module-stage { color: #64748b; font-size: 11px; font-weight: 950; letter-spacing: .18em; }
.module-age { padding: 6px 10px; border-radius: 999px; font-size: 12px; font-weight: 850; }
.primary-module .module-age { color: #6d28d9; background: #f3e8ff; }
.junior-module .module-age { color: #1d4ed8; background: #dbeafe; }
.module-symbol {
  position: relative;
  width: 78px;
  height: 78px;
  margin: 27px 0 18px;
  display: grid;
  place-items: center;
  border-radius: 24px;
  font-size: 25px;
  font-weight: 950;
}
.primary-module .module-symbol { color: #6d28d9; background: #f3e8ff; }
.junior-module .module-symbol { color: #1d4ed8; background: #dbeafe; }
.module-card h2 { margin: 0 0 10px; font-size: 30px; letter-spacing: -.025em; }
.module-card > p { min-height: 76px; margin: 0; color: var(--muted); line-height: 1.7; }
.module-feature-list { margin: 24px 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; list-style: none; }
.module-feature-list li { padding: 14px 8px; border-radius: 14px; text-align: center; background: #f7f9fc; }
.module-feature-list strong { display: block; overflow: hidden; text-overflow: ellipsis; font-size: 20px; }
.module-feature-list span { display: block; margin-top: 4px; color: var(--muted); font-size: 11px; line-height: 1.35; }
.module-enter { width: 100%; margin-top: auto; justify-content: space-between; padding: 16px 18px; color: white; }
.primary-enter { background: #7c3aed; }
.primary-enter:hover { background: #6d28d9; }
.junior-enter { background: #2563eb; }
.junior-enter:hover { background: #1d4ed8; }
.module-enter span { font-size: 21px; }
.module-home-note { margin: 20px 0 0; text-align: center; color: var(--muted); font-size: 12px; }

/* Primary module landing */
.primary-heading { margin-bottom: 18px; }
.primary-path {
  margin-bottom: 24px;
  padding: 13px 17px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid #ddd6fe;
  border-radius: 16px;
  color: #5b21b6;
  background: #f5f3ff;
  font-size: 13px;
}
.path-label { padding-right: 12px; border-right: 1px solid #ddd6fe; color: #7c3aed; font-weight: 900; }
.path-step { display: inline-flex; align-items: center; gap: 7px; font-weight: 750; }
.path-step b { width: 23px; height: 23px; display: grid; place-items: center; border-radius: 50%; color: white; background: #7c3aed; font-size: 11px; }
.path-arrow { color: #a78bfa; }
.primary-feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.primary-feature-card { position: relative; padding: 30px; display: grid; gap: 20px; overflow: hidden; }
.primary-feature-card::after { position: absolute; top: -42px; right: -42px; width: 130px; height: 130px; border-radius: 50%; background: rgba(124, 58, 237, .07); content: ""; }
.primary-feature-number { position: absolute; top: 20px; right: 24px; color: #ddd6fe; font-size: 34px; font-weight: 950; letter-spacing: -.06em; }
.primary-feature-card h2 { margin: 5px 0 9px; font-size: 25px; }
.primary-feature-card p { margin: 0; color: var(--muted); line-height: 1.65; }
.primary-feature-points { display: flex; flex-wrap: wrap; gap: 7px; }
.primary-feature-points span { padding: 7px 10px; border-radius: 999px; color: #5b21b6; background: #f3e8ff; font-size: 12px; font-weight: 750; }
.phonetic-feature .primary-feature-points span { color: #075985; background: #e0f2fe; }
.quiz-feature { grid-column: 1 / -1; grid-template-columns: 1.2fr .8fr; align-items: center; }
.quiz-feature > .primary-feature-number { grid-column: auto; }
.quiz-feature > .button { grid-column: 1 / -1; }
.quiz-progress-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.quiz-progress-summary div { padding: 13px; border-radius: 14px; text-align: center; background: #f7f9fc; }
.quiz-progress-summary span { display: block; margin-bottom: 5px; color: var(--muted); font-size: 11px; }
.quiz-progress-summary strong { font-size: 21px; }
.first-quiz-message { padding: 20px; border-radius: 14px; color: #64748b; background: #f7f9fc; line-height: 1.6; }
.feature-action-row { display: grid; grid-template-columns: 1.25fr .75fr; gap: 8px; }
.compact-progress-line { padding: 10px 12px; border-radius: 11px; color: #5b21b6; background: #f5f3ff; font-size: 12px; font-weight: 750; }
.vocabulary-feature .primary-feature-points span { color: #166534; background: #dcfce7; }
.primary-word-audio { margin-top: 13px; }
.audio-dictation-help { display: block; margin-top: 7px; color: #64748b; font-size: 12px; }

/* Four tenses lesson */
.lesson-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 22px; }
.lesson-heading h1 { margin: 8px 0 10px; font-size: clamp(34px, 5vw, 52px); letter-spacing: -.04em; }
.lesson-heading p { max-width: 760px; margin: 0; color: var(--muted); font-size: 16px; line-height: 1.7; }
.tense-jump-nav { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-bottom: 18px; }
.tense-jump-nav a { padding: 14px; display: flex; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 14px; background: white; box-shadow: 0 8px 22px rgba(25, 44, 78, .05); }
.tense-jump-nav a:hover { border-color: #a78bfa; color: #6d28d9; }
.tense-jump-nav b { color: #8b5cf6; font-size: 12px; }
.tense-jump-nav span { font-weight: 850; }
.time-guide { margin-bottom: 22px; padding: 18px; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.time-guide div { flex: 1; padding: 12px; border-radius: 13px; text-align: center; background: #f8fafc; }
.time-guide span { display: block; margin-bottom: 4px; color: var(--muted); font-size: 11px; }
.time-guide strong { font-size: 14px; }
.time-guide i { color: #a78bfa; font-style: normal; }
.junior-time-guide {
  margin-bottom: 22px;
  padding: 18px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.junior-time-guide div { padding: 14px 10px; border-radius: 13px; text-align: center; background: #eff6ff; }
.junior-time-guide span { display: block; margin-bottom: 5px; color: #64748b; font-size: 11px; }
.junior-time-guide strong { color: #1e3a8a; font-size: 14px; }
.junior-tense-lessons .tense-number { background: linear-gradient(135deg, #2563eb, #38bdf8); }
.junior-tense-lessons .use-panel { background: #eff6ff; }
.junior-tense-lessons .use-panel h3 span { color: #1d4ed8; background: #dbeafe; }
.junior-tense-lessons .use-panel ul { color: #1e3a8a; }
.junior-tense-lessons .example-note { color: #1d4ed8; background: #dbeafe; }
.junior-tense-practice-cta { border-color: #93c5fd; background: #eff6ff; }
.junior-tense-practice-cta strong,
.junior-tense-practice-cta span,
.junior-tense-lessons .back-to-tenses,
.junior-lesson-finish .lesson-progress-line { color: #1d4ed8; }
.tense-lesson-list { display: grid; gap: 24px; }
.tense-lesson { padding: 34px; scroll-margin-top: 92px; }
.tense-title { display: flex; gap: 18px; align-items: flex-start; padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.tense-number { flex: 0 0 auto; width: 56px; height: 56px; display: grid; place-items: center; border-radius: 18px; color: white; background: linear-gradient(135deg, #7c3aed, #a78bfa); font-size: 18px; font-weight: 950; }
.tense-title h2 { margin: 4px 0 8px; font-size: 30px; }
.tense-title p { margin: 0; color: var(--muted); line-height: 1.6; }
.tense-content-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 14px; margin: 22px 0 14px; }
.tense-panel { padding: 20px; border-radius: 16px; }
.tense-panel h3, .structure-panel h3, .tense-examples h3 { margin: 0 0 14px; font-size: 16px; }
.tense-panel h3 span { display: inline-grid; width: 26px; height: 26px; place-items: center; margin-right: 5px; border-radius: 8px; }
.use-panel { background: #f5f3ff; }
.use-panel h3 span { color: #6d28d9; background: #ede9fe; }
.use-panel ul { margin: 0; padding-left: 20px; color: #4c1d95; line-height: 1.85; }
.signal-panel { background: #f0f9ff; }
.signal-panel h3 span { color: #0369a1; background: #e0f2fe; }
.signal-words { display: flex; flex-wrap: wrap; gap: 7px; }
.signal-words code { padding: 6px 9px; color: #075985; background: white; border: 1px solid #bae6fd; font-family: inherit; font-weight: 750; }
.structure-panel { padding: 20px; border: 1px solid var(--line); border-radius: 16px; }
.structure-list { display: grid; gap: 8px; }
.structure-list div { display: grid; grid-template-columns: 105px 1fr; gap: 12px; align-items: center; padding: 11px 13px; border-radius: 11px; background: #f8fafc; }
.structure-list span { color: #64748b; font-size: 12px; font-weight: 800; }
.structure-list strong { font-size: 14px; }
.grammar-tip { margin: 14px 0; padding: 16px 18px; display: flex; gap: 14px; border-left: 4px solid #f59e0b; border-radius: 10px; color: #78350f; background: #fffbeb; }
.grammar-tip strong { flex: 0 0 auto; }
.grammar-tip p { margin: 0; line-height: 1.65; }
.tense-examples { margin-top: 22px; }
.tense-example { display: grid; grid-template-columns: 90px 1fr auto; gap: 15px; align-items: center; padding: 14px 0; border-top: 1px solid var(--line); }
.example-note { padding: 5px 8px; border-radius: 8px; color: #6d28d9; background: #f3e8ff; text-align: center; font-size: 11px; font-weight: 800; }
.tense-example strong { font-size: 16px; }
.tense-example p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.tense-practice-cta { margin-top: 20px; padding: 18px; display: flex; align-items: center; justify-content: space-between; gap: 18px; border: 1px solid #c4b5fd; border-radius: 16px; background: #faf5ff; }
.tense-practice-cta strong { color: #5b21b6; }
.tense-practice-cta p { margin: 4px 0; color: #64748b; font-size: 13px; }
.tense-practice-cta span { color: #7c3aed; font-size: 11px; font-weight: 750; }
.lesson-speak-button { border: 1px solid #c7d2fe; border-radius: 10px; padding: 9px 11px; color: #4338ca; background: #eef2ff; cursor: pointer; font-weight: 800; white-space: nowrap; }
.lesson-speak-button:hover, .lesson-speak-button.speaking { color: white; background: #4f46e5; }
.back-to-tenses { display: block; margin-top: 16px; color: #7c3aed; text-align: right; font-size: 12px; font-weight: 800; }
.lesson-finish { margin-top: 24px; padding: 28px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.lesson-finish h2 { margin: 5px 0; }
.lesson-finish p { margin: 0; color: var(--muted); }
.lesson-finish .lesson-progress-line { margin-top: 8px; color: #6d28d9; font-size: 12px; font-weight: 800; }

/* Phonetics teaching */
.phonetic-overview { margin: -2px 0 18px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.phonetic-overview div { padding: 17px; display: flex; align-items: baseline; justify-content: center; gap: 9px; border: 1px solid #bae6fd; border-radius: 15px; color: #075985; background: linear-gradient(145deg, #f0f9ff, #ecfeff); }
.phonetic-overview strong { font-size: 25px; }
.phonetic-overview span { color: #475569; font-size: 13px; font-weight: 750; }
.sound-help { margin-bottom: 18px; padding: 17px 20px; display: flex; align-items: center; gap: 15px; border-left: 4px solid #0ea5e9; }
.sound-help-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 13px; background: #e0f2fe; }
.sound-help strong { display: block; margin-bottom: 4px; }
.sound-help p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.5; }
.sound-help-warning { border-left-color: #f59e0b; background: #fffbeb; }
.phonetic-toolbox { margin-bottom: 18px; padding: 20px; }
.phonetic-toolbox label { margin-bottom: 12px; display: flex; align-items: baseline; gap: 10px; }
.phonetic-toolbox label strong { font-size: 17px; }
.phonetic-toolbox label span { color: var(--muted); font-size: 12px; }
.phonetic-search-row { display: grid; grid-template-columns: minmax(220px, 1fr) auto auto; gap: 9px; }
.phonetic-search-row input { width: 100%; min-height: 44px; padding: 11px 14px; border: 1.5px solid #bae6fd; border-radius: 11px; color: var(--ink); background: #f8fdff; font-size: 15px; outline: none; }
.phonetic-search-row input:focus { border-color: #0ea5e9; box-shadow: 0 0 0 3px rgba(14, 165, 233, .12); }
.phonetic-search-status { min-height: 18px; margin: 10px 2px 0; color: #0369a1; font-size: 12px; font-weight: 750; }
.phonetic-jump-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 28px; }
.phonetic-jump-nav a { padding: 15px 17px; display: flex; justify-content: space-between; border: 1px solid #bae6fd; border-radius: 14px; color: #075985; background: #f0f9ff; }
.phonetic-jump-nav span { font-weight: 850; }
.phonetic-jump-nav strong { font-size: 12px; }
.phonetic-section { margin-bottom: 34px; scroll-margin-top: 90px; }
.phonetic-section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 15px; }
.phonetic-section-heading h2 { margin: 5px 0 0; font-size: 27px; }
.phonetic-section-heading p { max-width: 620px; margin: 0; color: var(--muted); font-size: 14px; }
.phonetic-card-grid { display: grid; grid-template-columns: repeat(3, 1fr); align-items: start; gap: 12px; }
.phonetic-card { min-width: 0; min-height: 330px; padding: 20px; display: flex; flex-direction: column; }
.phonetic-card-topline { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.phonetic-symbol { width: fit-content; padding: 8px 12px; border-radius: 12px; color: #0c4a6e; background: #e0f2fe; font-family: "Segoe UI", Arial, sans-serif; font-size: 27px; font-weight: 850; }
.phonetic-main-speak { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid #bae6fd; border-radius: 50%; color: #0369a1; background: #f0f9ff; cursor: pointer; }
.phonetic-main-speak:hover, .phonetic-main-speak.speaking { color: white; background: #0284c7; }
.phonetic-word { margin: 16px 0 9px; display: grid; gap: 4px; }
.phonetic-word strong { font-size: 24px; }
.phonetic-word mark, #quizWord mark { padding: 0 2px; color: #c026d3; background: #fae8ff; border-radius: 4px; }
.phonetic-word span { color: var(--muted); font-size: 12px; }
.phonetic-card > p { margin: 0 0 14px; color: #475569; font-size: 13px; line-height: 1.55; }
.phonetic-pattern-preview { margin-top: auto; padding-top: 12px; border-top: 1px solid #e2e8f0; }
.phonetic-pattern-preview > span { display: block; margin-bottom: 8px; color: #64748b; font-size: 11px; font-weight: 800; }
.phonetic-pattern-preview > div { display: flex; flex-wrap: wrap; gap: 6px; }
.phonetic-pattern-preview b { padding: 4px 8px; border-radius: 7px; color: #9d174d; background: #fce7f3; font-family: "Segoe UI", Arial, sans-serif; font-size: 12px; }
.phonetic-pattern-details { margin-top: 13px; border-top: 1px dashed #cbd5e1; }
.phonetic-pattern-details summary { padding: 12px 0 2px; color: #0369a1; cursor: pointer; font-size: 12px; font-weight: 850; }
.phonetic-pattern-details[open] summary { margin-bottom: 10px; }
.phonetic-pattern-list { display: grid; gap: 8px; }
.phonetic-pattern-row { padding: 9px; display: grid; grid-template-columns: minmax(45px, auto) 1fr; gap: 9px; align-items: start; border-radius: 10px; background: #f8fafc; }
.phonetic-pattern-letters { min-width: 42px; padding: 5px 7px; border-radius: 7px; color: #9d174d; background: #fce7f3; text-align: center; font-family: "Segoe UI", Arial, sans-serif; font-size: 12px; font-weight: 900; }
.phonetic-pattern-examples { min-width: 0; display: flex; flex-wrap: wrap; gap: 5px; }
.phonetic-pattern-examples button { padding: 5px 7px; border: 1px solid #dbeafe; border-radius: 7px; color: #1e3a8a; background: white; cursor: pointer; font-size: 11px; }
.phonetic-pattern-examples button:hover, .phonetic-pattern-examples button.speaking { color: white; background: #2563eb; }
.phonetic-pattern-examples i { margin-left: 2px; font-size: 9px; font-style: normal; }
.phonetic-empty { margin-bottom: 20px; padding: 30px; text-align: center; }
.phonetic-empty p { margin: 7px 0 0; color: var(--muted); }

/* Phonetics listening quiz */
.quiz-shell { width: min(800px, 100%); margin: 0 auto; }
.quiz-topline { margin-bottom: 16px; display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; }
.quiz-topline h1 { margin: 6px 0 0; font-size: clamp(30px, 5vw, 43px); }
.phonetic-quiz-card { padding: 34px; text-align: center; }
.quiz-group-badge { display: inline-flex; padding: 6px 10px; border-radius: 999px; color: #0369a1; background: #e0f2fe; font-size: 12px; font-weight: 850; }
.phonetic-quiz-card > h2 { margin: 14px 0 18px; font-size: 22px; }
.quiz-audio-button { width: min(360px, 100%); margin: 0 auto; padding: 20px; display: grid; grid-template-columns: auto 1fr; grid-template-rows: auto auto; column-gap: 14px; align-items: center; border: 0; border-radius: 18px; color: white; background: linear-gradient(135deg, #7c3aed, #4f46e5); box-shadow: 0 14px 30px rgba(79, 70, 229, .22); cursor: pointer; text-align: left; }
.quiz-audio-button:hover, .quiz-audio-button.playing { transform: translateY(-1px); background: linear-gradient(135deg, #6d28d9, #4338ca); }
.quiz-audio-button > span { grid-row: 1 / 3; width: 50px; height: 50px; display: grid; place-items: center; border-radius: 50%; background: rgba(255,255,255,.16); font-size: 24px; }
.quiz-audio-button strong { font-size: 18px; }
.quiz-audio-button small { opacity: .78; }
.quiz-word-prompt { margin: 22px 0 17px; display: grid; gap: 5px; }
.quiz-word-prompt > span { color: var(--muted); font-size: 12px; }
#quizWord { font-size: 34px; letter-spacing: .02em; }
#quizMeaning { color: #64748b; }
.phonetic-options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.phonetic-option { padding: 15px 17px; display: flex; align-items: center; gap: 14px; border: 1.5px solid var(--line); border-radius: 14px; color: var(--ink); background: white; cursor: pointer; }
.phonetic-option:hover:not(:disabled) { border-color: #8b5cf6; background: #faf5ff; }
.phonetic-option > span { width: 26px; height: 26px; display: grid; place-items: center; border-radius: 8px; color: #6d28d9; background: #f3e8ff; font-size: 11px; font-weight: 900; }
.phonetic-option strong { font-size: 22px; }
.phonetic-option.correct-option { border-color: #22c55e; color: #166534; background: #dcfce7; }
.phonetic-option.wrong-option { border-color: #ef4444; color: #991b1b; background: #fee2e2; }
.quiz-feedback { margin-top: 14px; padding: 14px 16px; display: grid; gap: 5px; border-radius: 13px; text-align: left; }
.quiz-feedback.correct { color: #166534; background: #dcfce7; }
.quiz-feedback.wrong { color: #991b1b; background: #fee2e2; }
.quiz-feedback span { font-size: 13px; line-height: 1.5; }
.quiz-next-button { width: 100%; margin-top: 12px; }
.quiz-result-card { padding: 42px; text-align: center; }
.quiz-result-card h2 { margin: 10px 0 20px; font-size: 32px; }
.quiz-final-score { width: 180px; height: 180px; margin: 0 auto 20px; display: flex; flex-direction: column; align-items: center; justify-content: center; border: 12px solid #ddd6fe; border-radius: 50%; background: #f5f3ff; }
.quiz-final-score strong { color: #6d28d9; font-size: 44px; }
.quiz-final-score span { color: #64748b; font-size: 12px; }
.quiz-result-card > p { color: var(--muted); line-height: 1.6; }
.quiz-result-actions { margin-top: 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.quiz-result-actions .button:last-child { grid-column: 1 / -1; }
.quiz-audio-status { min-height: 20px; color: #b91c1c; text-align: center; font-size: 12px; }

/* Four tenses practice */
.tense-quiz-shell .quiz-topline { align-items: flex-start; }
.tense-quiz-shell .quiz-topline p { max-width: 610px; margin: 8px 0 0; color: var(--muted); line-height: 1.55; }
.quiz-history-strip { margin: -4px 0 14px; padding: 11px 15px; display: flex; justify-content: flex-end; gap: 18px; border-radius: 12px; color: #64748b; background: white; font-size: 12px; }
.quiz-history-strip strong { color: #6d28d9; }
.tense-question-card { padding: 34px; text-align: center; }
.tense-question-tip { margin: 14px 0 8px; color: var(--muted); font-size: 12px; }
.tense-question-card h2 { margin: 0; font-size: clamp(24px, 4vw, 34px); line-height: 1.4; }
.tense-chinese { margin: 9px 0 24px; color: #64748b; }
.tense-options { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.tense-option { min-height: 62px; padding: 14px 17px; display: flex; align-items: center; gap: 14px; border: 1.5px solid var(--line); border-radius: 14px; color: var(--ink); background: white; cursor: pointer; text-align: left; }
.tense-option:hover:not(:disabled) { border-color: #8b5cf6; background: #faf5ff; }
.tense-option > span { flex: 0 0 auto; width: 27px; height: 27px; display: grid; place-items: center; border-radius: 8px; color: #6d28d9; background: #f3e8ff; font-size: 11px; font-weight: 900; }
.tense-option strong { font-size: 17px; }
.tense-option.correct-option { border-color: #22c55e; color: #166534; background: #dcfce7; }
.tense-option.wrong-option { border-color: #ef4444; color: #991b1b; background: #fee2e2; }

@media (max-width: 900px) {
  .phonetic-card-grid { grid-template-columns: repeat(2, 1fr); }
  .module-card { padding: 28px; }
}

@media (max-width: 720px) {
  .module-grid, .primary-feature-grid { grid-template-columns: 1fr; }
  .module-card { min-height: 470px; }
  .quiz-feature { grid-column: auto; grid-template-columns: 1fr; }
  .quiz-feature > .button { grid-column: auto; }
  .primary-path { overflow-x: auto; white-space: nowrap; }
  .tense-jump-nav { grid-template-columns: 1fr 1fr; }
  .time-guide { align-items: stretch; flex-direction: column; }
  .time-guide i { transform: rotate(90deg); text-align: center; }
  .tense-content-grid { grid-template-columns: 1fr; }
  .tense-practice-cta { align-items: stretch; flex-direction: column; }
  .junior-grammar-card { grid-template-columns: auto 1fr; }
  .junior-grammar-actions { grid-column: 1 / -1; grid-template-columns: 1fr 1fr; }
  .junior-time-guide { grid-template-columns: 1fr 1fr; }
  .phonetic-search-row { grid-template-columns: 1fr 1fr; }
  .phonetic-search-row input { grid-column: 1 / -1; }
  .phonetic-card-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .module-card { min-height: 0; padding: 25px 20px; }
  .module-card > p { min-height: 0; }
  .module-card h2 { font-size: 26px; }
  .module-feature-list strong { font-size: 17px; }
  .primary-feature-card { padding: 24px 20px; }
  .feature-action-row { grid-template-columns: 1fr; }
  .quiz-progress-summary { grid-template-columns: 1fr 1fr 1fr; }
  .lesson-heading, .quiz-topline, .lesson-finish { align-items: flex-start; flex-direction: column; }
  .lesson-heading .button, .quiz-topline .button, .lesson-finish .button { width: 100%; }
  .tense-jump-nav { grid-template-columns: 1fr; }
  .tense-lesson { padding: 24px 18px; }
  .tense-title { gap: 12px; }
  .tense-number { width: 46px; height: 46px; border-radius: 14px; }
  .tense-title h2 { font-size: 24px; }
  .structure-list div { grid-template-columns: 1fr; gap: 4px; }
  .grammar-tip { flex-direction: column; gap: 6px; }
  .tense-example { grid-template-columns: 1fr; gap: 9px; }
  .tense-question-card { padding: 26px 17px; }
  .tense-options { grid-template-columns: 1fr; }
  .quiz-history-strip { justify-content: space-between; gap: 7px; }
  .example-note { width: fit-content; }
  .lesson-speak-button { width: 100%; }
  .junior-grammar-card { padding: 23px 18px; grid-template-columns: 54px 1fr; gap: 14px; align-items: start; }
  .junior-grammar-icon { width: 54px; height: 54px; border-radius: 17px; font-size: 18px; }
  .junior-grammar-copy h2 { font-size: 22px; }
  .junior-grammar-actions { grid-template-columns: 1fr; }
  .junior-time-guide { grid-template-columns: 1fr; }
  .phonetic-jump-nav { grid-template-columns: 1fr; }
  .phonetic-overview { grid-template-columns: 1fr; gap: 7px; }
  .phonetic-overview div { justify-content: space-between; padding: 13px 16px; }
  .phonetic-toolbox label { align-items: flex-start; flex-direction: column; gap: 3px; }
  .phonetic-search-row { grid-template-columns: 1fr; }
  .phonetic-search-row input { grid-column: auto; }
  .phonetic-search-row .button { width: 100%; }
  .phonetic-section-heading { align-items: flex-start; flex-direction: column; }
  .phonetic-card-grid { grid-template-columns: 1fr; gap: 9px; }
  .phonetic-card { min-height: 0; padding: 18px 16px; }
  .phonetic-symbol { font-size: 23px; }
  .phonetic-word strong { font-size: 21px; }
  .phonetic-quiz-card { padding: 24px 16px; }
  .phonetic-options { grid-template-columns: 1fr; }
  .quiz-result-card { padding: 30px 18px; }
  .quiz-result-actions { grid-template-columns: 1fr; }
  .quiz-result-actions .button:last-child { grid-column: auto; }
}

@media (max-width: 820px) {
  body.primary-quiz-page .topbar,
  body.primary-quiz-page .footer,
  body.junior-quiz-page .topbar,
  body.junior-quiz-page .footer { display: none; }
  body.primary-quiz-page .page-shell,
  body.junior-quiz-page .page-shell { margin-top: 10px; }
}

@media (max-width: 380px) {
  .phonetic-card-grid { grid-template-columns: 1fr; }
  .phonetic-card { min-height: 0; }
}

/* Encouragement, stars and reward store */
.module-quick-stats a { color: inherit; text-decoration: none; }
.answer-encouragement { --feedback-accent: var(--primary); --feedback-soft: var(--soft-blue); --feedback-duration: 1050ms; position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 20px; pointer-events: none; opacity: 0; visibility: hidden; background: rgba(23, 32, 51, .2); backdrop-filter: blur(5px); transition: opacity .18s ease, visibility .18s ease; }
.answer-encouragement.visible { opacity: 1; visibility: visible; }
.answer-encouragement.correct { --feedback-accent: #16a34a; --feedback-soft: #ecfdf3; }
.answer-encouragement.wrong { --feedback-accent: #e11d48; --feedback-soft: #fff1f2; }
.answer-encouragement-card { width: min(390px, 90vw); padding: 28px 30px 24px; overflow: hidden; text-align: left; color: var(--ink); border: 1px solid rgba(210, 220, 234, .95); border-top: 5px solid var(--feedback-accent); border-radius: 24px; background: rgba(255,255,255,.98); box-shadow: 0 26px 80px rgba(25, 44, 78, .24); transform: translateY(15px) scale(.96); animation: reward-pop .34s cubic-bezier(.18, .89, .32, 1.18) forwards; }
.answer-encouragement-status { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.answer-encouragement-icon { display: grid; place-items: center; width: 38px; height: 38px; flex: 0 0 auto; color: white; border-radius: 12px; background: var(--feedback-accent); box-shadow: 0 8px 20px color-mix(in srgb, var(--feedback-accent) 25%, transparent); font-size: 22px; font-weight: 950; }
.answer-encouragement-status em { color: var(--feedback-accent); font-size: 11px; font-style: normal; font-weight: 950; letter-spacing: .14em; }
.answer-encouragement-card > strong { display: block; font-size: clamp(25px, 5vw, 32px); letter-spacing: -.03em; }
.answer-encouragement-card > p { margin: 8px 0 20px; color: var(--muted); font-size: 14px; line-height: 1.55; }
.answer-encouragement-progress { height: 5px; overflow: hidden; border-radius: 999px; background: var(--feedback-soft); }
.answer-encouragement-progress i { display: block; width: 100%; height: 100%; border-radius: inherit; background: var(--feedback-accent); transform-origin: left; animation: feedback-countdown var(--feedback-duration) linear forwards; }
@keyframes reward-pop { to { transform: translateY(0) scale(1); } }
@keyframes feedback-countdown { to { transform: scaleX(0); } }

.reward-result-panel { margin: 22px 0 28px; padding: 22px; text-align: center; color: #713f12; border: 1px solid #fde68a; border-radius: 20px; background: linear-gradient(145deg, #fffbeb, #fef3c7); }
.reward-result-stars { display: flex; justify-content: center; gap: 8px; margin-bottom: 10px; }
.reward-result-stars span { color: #d1d5db; font-size: 38px; filter: grayscale(1); }
.reward-result-stars span.earned { color: #f59e0b; filter: none; text-shadow: 0 3px 10px rgba(245, 158, 11, .25); }
.reward-result-panel > strong { display: block; font-size: 21px; }
.reward-result-panel .reward-points-earned { color: #b45309; font-size: 28px; }
.reward-result-panel p { margin: 7px 0 10px; color: #92400e; }
.reward-result-panel a { color: #7c2d12; font-weight: 800; }

.reward-store-heading { align-items: flex-end; }
.points-wallet-grid { display: grid; grid-template-columns: 1.25fr repeat(3, 1fr); gap: 12px; margin-bottom: 18px; }
.points-wallet-grid article { padding: 22px; }
.points-wallet-grid span, .points-wallet-grid small { display: block; color: var(--muted); }
.points-wallet-grid strong { display: block; margin: 6px 0; font-size: 30px; }
.points-wallet-main { color: white; background: linear-gradient(145deg, #7c3aed, #4f46e5); }
.points-wallet-main span, .points-wallet-main small { color: #ede9fe; }
.points-wallet-main strong { font-size: 46px; }
.reward-rules { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; padding: 20px; text-align: center; }
.reward-rules div { padding: 13px; border-radius: 15px; background: #fffbeb; }
.reward-rules span, .reward-rules strong, .reward-rules small { display: block; }
.reward-rule-stars { min-height: 28px; color: #f59e0b; font-size: 21px; letter-spacing: 3px; }
.reward-rules p { grid-column: 1 / -1; margin: 2px 0 0; color: var(--muted); font-size: 13px; }
.reward-section-title { margin: 32px 0 15px; }
.reward-product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.reward-product-card { position: relative; display: flex; flex-direction: column; padding: 24px; overflow: hidden; }
.reward-product-card.sold-out { opacity: .67; }
.reward-product-emoji { display: grid; place-items: center; width: 70px; height: 70px; margin-bottom: 16px; font-size: 40px; border-radius: 22px; background: #f5f3ff; }
.reward-product-category { width: fit-content; padding: 4px 8px; color: #6d28d9; font-size: 11px; font-weight: 800; border-radius: 999px; background: #ede9fe; }
.reward-product-card h3 { margin: 10px 0 6px; font-size: 23px; }
.reward-product-card > p { min-height: 44px; margin: 0 0 18px; color: var(--muted); line-height: 1.5; }
.reward-product-meta { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: auto; padding: 13px 0; border-top: 1px solid var(--line); }
.reward-product-meta strong { color: #b45309; font-size: 18px; }
.reward-product-meta span { color: var(--muted); font-size: 12px; }
.reward-product-card form { display: grid; gap: 8px; }
.reward-product-card input { width: 100%; box-sizing: border-box; padding: 10px 12px; border: 1px solid var(--line); border-radius: 11px; }
.reward-history-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 16px; margin-top: 30px; }
.redemption-status { display: inline-flex; width: fit-content; padding: 5px 9px; font-size: 11px; font-weight: 800; border-radius: 999px; }
.redemption-status.pending { color: #92400e; background: #fef3c7; }
.redemption-status.approved { color: #166534; background: #dcfce7; }
.redemption-status.rejected { color: #991b1b; background: #fee2e2; }
.points-transaction-list { display: grid; gap: 1px; }
.points-transaction-list > div { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.points-transaction-list span { font-size: 13px; }
.points-transaction-list small { color: var(--muted); }
.points-transaction-list strong { grid-column: 2; grid-row: 1 / 3; align-self: center; }
.points-transaction-list strong.positive { color: #15803d; }
.points-transaction-list strong.negative { color: #dc2626; }

.reward-admin-create { padding: 25px; margin-top: 20px; }
.reward-product-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.reward-create-form { grid-template-columns: 100px 1.4fr 1fr 1fr 1fr; align-items: end; }
.reward-product-form label { display: grid; gap: 5px; color: var(--muted); font-size: 12px; font-weight: 700; }
.reward-product-form input, .reward-product-form select { width: 100%; box-sizing: border-box; padding: 10px 11px; color: var(--text); border: 1px solid var(--line); border-radius: 10px; background: white; }
.reward-product-form .wide { grid-column: 1 / -1; }
.admin-product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.admin-product-card { padding: 20px; }
.admin-product-card.disabled-product { opacity: .68; }
.admin-product-heading { grid-column: 1 / -1; display: flex; align-items: center; gap: 10px; margin-bottom: 5px; }
.admin-product-heading > span { font-size: 34px; }
.admin-product-heading strong, .admin-product-heading small { display: block; }
.admin-product-heading small { color: var(--muted); }
.product-enabled-toggle { grid-column: 1 / -1; display: flex !important; grid-template-columns: auto 1fr; align-items: center; }
.product-enabled-toggle input { width: auto; }
.admin-product-toggle-form { margin-top: 10px; }
.admin-product-toggle-form .button { width: 100%; }
.admin-redemption-section { margin-top: 30px; }
.review-inline-form { display: grid; grid-template-columns: minmax(130px, 1fr) auto auto; gap: 6px; min-width: 400px; }
.review-inline-form input { min-width: 0; padding: 8px 9px; border: 1px solid var(--line); border-radius: 9px; }
.redemption-admin-table td small { display: block; margin-top: 3px; color: var(--muted); }
.reward-admin-stat a { color: #6d28d9; }

@media (max-width: 1000px) {
  .points-wallet-grid { grid-template-columns: 1fr 1fr; }
  .reward-product-grid, .admin-product-grid { grid-template-columns: 1fr 1fr; }
  .reward-history-grid { grid-template-columns: 1fr; }
  .reward-create-form { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .points-wallet-grid, .reward-product-grid, .admin-product-grid { grid-template-columns: 1fr; }
  .reward-rules { grid-template-columns: 1fr; }
  .reward-rules p { grid-column: auto; }
  .reward-product-card > p { min-height: 0; }
  .reward-create-form, .reward-product-form { grid-template-columns: 1fr; }
  .reward-product-form .wide, .admin-product-heading, .product-enabled-toggle { grid-column: auto; }
  .review-inline-form { min-width: 320px; grid-template-columns: 1fr 1fr; }
  .review-inline-form input { grid-column: 1 / -1; }
  .answer-encouragement-card { padding: 24px 22px 21px; }
}

@media (prefers-reduced-motion: reduce) {
  .answer-encouragement-card { animation: none; transform: none; }
  .answer-encouragement-progress i { animation: none; }
}

/* Grammar and vocabulary knowledge modules */
.grammar-library-heading p, .grammar-detail-heading p { max-width: 760px; }
.grammar-library-stats { margin-bottom: 20px; padding: 20px 24px; display: grid; grid-template-columns: repeat(3, minmax(110px, 1fr)) 2.2fr; gap: 12px; align-items: center; }
.grammar-library-stats div { padding: 12px 16px; border-radius: 14px; background: #f8fafc; }
.grammar-library-stats span, .grammar-library-stats strong { display: block; }
.grammar-library-stats span { color: var(--muted); font-size: 12px; }
.grammar-library-stats strong { margin-top: 4px; color: #6d28d9; font-size: 24px; }
.grammar-library-stats p { margin: 0; color: #64748b; font-size: 13px; line-height: 1.6; }
.grammar-module-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.grammar-module-card { min-width: 0; padding: 23px; display: flex; flex-direction: column; }
.grammar-module-topline { display: flex; align-items: center; justify-content: space-between; }
.grammar-module-icon { width: 54px; height: 54px; display: grid; place-items: center; color: white; border-radius: 17px; background: linear-gradient(145deg, #7c3aed, #4f46e5); box-shadow: 0 10px 25px rgba(79,70,229,.18); font-size: 17px; font-weight: 900; }
.grammar-module-icon.large { flex: 0 0 auto; width: 76px; height: 76px; border-radius: 23px; font-size: 23px; }
.grammar-module-number { color: #cbd5e1; font-size: 13px; font-weight: 900; letter-spacing: .12em; }
.grammar-module-card h2 { margin: 16px 0 7px; font-size: 23px; }
.grammar-module-card > p { min-height: 63px; margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.grammar-topic-preview { margin: 15px 0; display: flex; flex-wrap: wrap; gap: 6px; }
.grammar-topic-preview span { padding: 5px 8px; color: #5b21b6; border-radius: 999px; background: #f3e8ff; font-size: 11px; font-weight: 750; }
.grammar-card-progress { margin-top: auto; padding: 11px 0; display: flex; justify-content: space-between; gap: 8px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.grammar-card-progress strong { color: #6d28d9; }
.grammar-card-progress.new strong { color: #0f766e; }
.grammar-card-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.grammar-card-actions .button { padding-inline: 10px; }
.grammar-detail-title { display: flex; align-items: center; gap: 18px; }
.grammar-topic-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-bottom: 17px; }
.grammar-explanation-card { padding: 27px; }
.grammar-topic-index { display: inline-flex; padding: 5px 9px; color: #6d28d9; border-radius: 999px; background: #ede9fe; font-size: 11px; font-weight: 850; }
.grammar-explanation-card h2 { margin: 13px 0 8px; }
.grammar-rule { margin: 0; color: #334155; line-height: 1.75; }
.grammar-explanation-card ul { margin: 16px 0 0; padding: 14px 18px 14px 35px; color: #475569; border-radius: 13px; background: #f8fafc; }
.grammar-explanation-card li + li { margin-top: 7px; }
.grammar-example-section { padding: 28px; }
.grammar-section-heading { margin-bottom: 16px; display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; }
.grammar-section-heading h2 { margin: 4px 0 0; }
.grammar-section-heading > span { color: var(--muted); font-size: 12px; }
.grammar-example-list { display: grid; gap: 10px; }
.grammar-example-row { padding: 15px; display: grid; grid-template-columns: minmax(90px, auto) 1fr auto; gap: 14px; align-items: center; border: 1px solid var(--line); border-radius: 14px; background: #fff; }
.grammar-example-row > span { width: fit-content; padding: 5px 8px; color: #9d174d; border-radius: 8px; background: #fce7f3; font-size: 11px; font-weight: 800; }
.grammar-example-row strong { font-size: 17px; }
.grammar-example-row p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
.grammar-memory-tip { margin: 17px 0; padding: 20px 24px; display: grid; grid-template-columns: auto 1fr; gap: 16px; align-items: center; color: #713f12; border-color: #fde68a; background: #fffbeb; }
.grammar-memory-tip span { padding: 7px 10px; color: #92400e; border-radius: 9px; background: #fef3c7; font-size: 12px; font-weight: 900; }
.grammar-memory-tip p { margin: 0; line-height: 1.65; }
.grammar-lesson-finish { margin-top: 0; }
.grammar-hub-card { margin-top: 18px; }
.grammar-hub-card .junior-grammar-actions { grid-template-columns: 1fr; }
.grammar-quiz-shell .tense-chinese.hidden { display: none; }

@media (max-width: 1000px) {
  .grammar-module-grid { grid-template-columns: 1fr 1fr; }
  .grammar-library-stats { grid-template-columns: repeat(3, 1fr); }
  .grammar-library-stats p { grid-column: 1 / -1; }
}

@media (max-width: 700px) {
  .grammar-module-grid, .grammar-topic-grid { grid-template-columns: 1fr; }
  .grammar-library-stats { grid-template-columns: 1fr 1fr 1fr; padding: 15px; }
  .grammar-library-stats div { padding: 9px; text-align: center; }
  .grammar-library-stats strong { font-size: 20px; }
  .grammar-detail-title { align-items: flex-start; }
  .grammar-example-row { grid-template-columns: 1fr; }
  .grammar-example-row .lesson-speak-button { width: 100%; }
}

@media (max-width: 480px) {
  .grammar-library-stats { grid-template-columns: 1fr; }
  .grammar-library-stats p { grid-column: auto; }
  .grammar-module-card { padding: 20px 17px; }
  .grammar-module-card > p { min-height: 0; }
  .grammar-card-actions { grid-template-columns: 1fr; }
  .grammar-detail-title { display: grid; }
  .grammar-module-icon.large { width: 62px; height: 62px; border-radius: 18px; }
  .grammar-explanation-card, .grammar-example-section { padding: 21px 17px; }
  .grammar-section-heading { align-items: flex-start; flex-direction: column; }
  .grammar-memory-tip { grid-template-columns: 1fr; padding: 17px; }
}

/* Teacher accounts and file-based homework */
.login-wrap { min-height: 620px; display: grid; place-items: center; }
.login-wrap .login-card { width: min(470px, 100%); }
.login-switch { display: block; margin-top: 20px; color: var(--primary); text-align: center; font-weight: 800; }
.teacher-create-form { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 13px; align-items: end; }
.teacher-create-form label, .teacher-scope-card label, .homework-upload-form label, .homework-editor-form label, .grading-form label { display: grid; gap: 7px; }
.permission-check { display: flex !important; align-items: center; gap: 9px; padding: 12px 13px; border: 1px solid var(--line); border-radius: 12px; background: #f8fafc; }
.permission-check input, .student-assignment-option input, .delete-question-check input { width: auto; }
.teacher-table-card, .teacher-activity-preview { margin-top: 20px; }
.teacher-scope-card { padding: 28px; }
.permission-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 16px 0 28px; }
.teacher-scope-card .section-title-row p { margin: 5px 0 0; color: var(--muted); }
.student-assignment-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.student-assignment-option { padding: 12px; display: flex !important; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 13px; background: #fff; cursor: pointer; }
.student-assignment-option:has(input:checked) { border-color: #93c5fd; background: #eff6ff; }
.student-assignment-option span, .student-assignment-option strong, .student-assignment-option small { display: block; }
.student-assignment-option small { margin-top: 3px; color: var(--muted); font-size: 11px; }
.teacher-account-actions { margin: 17px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.inline-admin-form { padding: 20px; display: flex; align-items: end; gap: 12px; }
.inline-admin-form label { flex: 1; }

.homework-upload-card { padding: 30px; display: grid; grid-template-columns: .75fr 1.25fr; gap: 30px; }
.homework-upload-card h2 { margin: 7px 0; }
.homework-upload-card > div > p { color: var(--muted); line-height: 1.6; }
.homework-upload-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.homework-upload-form .wide { grid-column: 1 / -1; }
.homework-upload-form textarea, .homework-editor-form textarea, .grading-form textarea { width: 100%; resize: vertical; padding: 13px 14px; border: 1.5px solid var(--line); border-radius: 12px; font: inherit; }
.file-upload-field { padding: 15px; border: 1px dashed #93c5fd; border-radius: 14px; background: #f8fbff; }
.file-upload-field input[type="file"] { width: 100%; padding: 10px; border: 1px solid #bfdbfe; border-radius: 11px; background: white; }
.file-upload-field small { color: var(--muted); line-height: 1.5; }
.file-summary { margin-top: 16px; padding: 15px; display: flex; align-items: center; gap: 12px; border: 1px solid #bfdbfe; border-radius: 14px; background: #eff6ff; }
.file-summary > span { font-size: 24px; }
.file-summary > div { min-width: 0; flex: 1; }
.file-summary small, .file-summary strong { display: block; }
.file-summary small { margin-bottom: 3px; color: var(--muted); }
.file-summary strong { overflow-wrap: anywhere; }
.file-summary.compact { margin: 0 0 14px; padding: 10px 12px; }
.file-summary.compact > span { font-size: 18px; }
.file-summary.compact strong { min-width: 0; overflow-wrap: anywhere; font-size: 13px; }
.homework-card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
.homework-card { min-width: 0; padding: 23px; display: flex; flex-direction: column; }
.homework-card-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.homework-card-top small { color: var(--muted); }
.homework-card h2 { margin: 16px 0 7px; font-size: 22px; }
.homework-card > p { min-height: 44px; margin: 0 0 16px; color: var(--muted); line-height: 1.5; }
.homework-card-stats { margin: auto 0 15px; padding: 12px 0; display: flex; flex-wrap: wrap; gap: 9px 15px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.homework-card-stats strong { color: var(--ink); }
.homework-card-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.homework-editor-form { display: grid; gap: 18px; }
.homework-settings-card, .homework-section-editor, .homework-assign-card { padding: 28px; }
.paper-summary { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.paper-summary span { padding: 7px 10px; color: #1e40af; border-radius: 999px; background: #eff6ff; font-size: 12px; font-weight: 800; }
.section-editor-heading, .grading-section > header, .homework-section-block > header { display: grid; grid-template-columns: auto 1fr; gap: 14px; align-items: start; }
.section-number { width: 40px; height: 40px; display: grid; place-items: center; flex: 0 0 auto; color: white; border-radius: 13px; background: linear-gradient(145deg, #2563eb, #4f46e5); font-weight: 950; }
.section-editor-heading > div { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.passage-editor { margin-bottom: 18px; line-height: 1.7; }
.question-editor-list { display: grid; gap: 13px; }
.question-editor-item { padding: 20px; border: 1px solid var(--line); border-radius: 17px; background: #f8fafc; }
.question-editor-top { margin-bottom: 12px; display: grid; grid-template-columns: 1fr minmax(190px, .55fr) 100px; gap: 9px; align-items: end; }
.question-answer-editor { margin: 11px 0; display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
.question-answer-editor small { color: var(--muted); font-weight: 500; line-height: 1.45; }
.delete-question-check { width: fit-content; margin-top: 10px; display: flex !important; align-items: center; grid-template-columns: auto 1fr; color: #b91c1c; }
.homework-assign-card .section-title-row p { color: var(--muted); }
.sticky-editor-actions { position: sticky; bottom: 12px; z-index: 10; padding: 13px; display: flex; justify-content: flex-end; gap: 9px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.94); box-shadow: 0 16px 40px rgba(25,44,78,.14); backdrop-filter: blur(12px); }
.add-builder-item { margin-top: 14px; }
.add-section-button { width: 100%; margin-bottom: 18px; border: 1px dashed #93c5fd; }

.assignment-status { display: inline-flex; width: fit-content; padding: 5px 9px; border-radius: 999px; font-size: 11px; font-weight: 850; }
.assignment-status.assigned, .assignment-status.in_progress { color: #1e40af; background: #dbeafe; }
.assignment-status.pending_review { color: #92400e; background: #fef3c7; }
.assignment-status.graded { color: #166534; background: #dcfce7; }
.assignment-status.overdue { color: #b83b2f; background: #fff0ed; }
.student-assignment-card .button { margin-top: auto; }
.button.disabled { cursor: not-allowed; opacity: .58; pointer-events: none; }
.homework-take-shell { width: min(920px, 100%); margin: 0 auto; }
.homework-take-heading { margin-bottom: 20px; display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; }
.homework-take-heading h1 { margin: 7px 0; font-size: clamp(30px, 5vw, 45px); }
.homework-take-heading p { margin: 0; color: var(--muted); }
.file-homework-card, .submitted-file-card, .answer-upload-form { padding: 27px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.file-homework-card h2, .submitted-file-card h2, .answer-upload-form h2 { margin: 6px 0; }
.file-homework-card p, .submitted-file-card p, .answer-upload-form p { margin: 0; color: var(--muted); overflow-wrap: anywhere; }
.answer-upload-form { margin-top: 18px; display: grid; grid-template-columns: 1fr 1.1fr auto; }
.answer-upload-form .file-upload-field { margin: 0; }
.muted-text { color: var(--muted); font-size: 12px; }
.homework-score-chip { flex: 0 0 auto; padding: 12px 17px; text-align: center; border: 1px solid #bfdbfe; border-radius: 15px; background: #eff6ff; }
.homework-score-chip span, .homework-score-chip strong { display: block; }
.homework-score-chip span { color: var(--muted); font-size: 11px; }
.homework-score-chip strong { margin-top: 3px; color: #1d4ed8; font-size: 21px; }
.homework-section-block, .reviewed-section, .grading-section { margin-bottom: 17px; padding: 28px; }
.homework-section-block > header h2, .grading-section > header h2 { margin: 2px 0 5px; }
.homework-section-block > header p, .grading-section > header p { margin: 0; color: var(--muted); }
.reading-passage { margin: 18px 0; border: 1px solid #c7d2fe; border-radius: 16px; background: #f8faff; }
.reading-passage summary { padding: 14px 17px; color: #3730a3; cursor: pointer; font-weight: 850; }
.reading-passage > div { padding: 18px; white-space: pre-wrap; border-top: 1px solid #dbeafe; line-height: 1.9; }
.student-question-list { display: grid; gap: 13px; }
.student-question-item, .reviewed-question, .grading-question { padding: 20px; border: 1px solid var(--line); border-radius: 17px; background: white; }
.student-question-heading { display: grid; grid-template-columns: 34px 1fr; gap: 11px; align-items: start; }
.student-question-heading > span { width: 34px; height: 34px; display: grid; place-items: center; color: #1d4ed8; border-radius: 10px; background: #dbeafe; font-weight: 900; }
.student-question-heading strong, .student-question-heading small { display: block; }
.student-question-heading strong { line-height: 1.65; }
.student-question-heading small { margin-top: 5px; color: var(--muted); }
.student-choice-list { margin-top: 15px; display: grid; gap: 8px; }
.student-choice-list label { cursor: pointer; }
.student-choice-list input { position: absolute; opacity: 0; pointer-events: none; }
.student-choice-list label > span { padding: 13px 15px; display: flex; align-items: center; gap: 11px; border: 1.5px solid var(--line); border-radius: 13px; }
.student-choice-list label > span b { width: 29px; height: 29px; display: grid; place-items: center; color: #475569; border-radius: 9px; background: #edf2f8; }
.student-choice-list input:checked + span { color: #1e3a8a; border-color: #60a5fa; background: #eff6ff; }
.student-choice-list input:checked + span b { color: white; background: var(--primary); }
.student-text-answer { width: 100%; margin-top: 15px; padding: 14px; resize: vertical; border: 1.5px solid var(--line); border-radius: 13px; font: inherit; }
.homework-submit-panel { margin: 18px 0; padding: 24px; display: flex; justify-content: space-between; align-items: center; gap: 18px; }
.homework-submit-panel p { margin: 5px 0 0; color: var(--muted); }
.homework-save-status { display: inline-block; margin-top: 7px; color: var(--muted); }
.homework-save-status.error { color: var(--red); }
.homework-result-summary { margin-bottom: 17px; padding: 24px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.homework-result-summary div { padding: 13px; border-radius: 13px; background: #f8fafc; }
.homework-result-summary span, .homework-result-summary strong { display: block; }
.homework-result-summary span { color: var(--muted); font-size: 12px; }
.homework-result-summary strong { margin-top: 6px; font-size: 20px; }
.teacher-overall-note { margin-bottom: 17px; padding: 22px; border-color: #fde68a; background: #fffbeb; }
.teacher-overall-note span { color: #92400e; font-size: 12px; font-weight: 850; }
.teacher-overall-note p { margin-bottom: 0; line-height: 1.7; }
.reviewed-question + .reviewed-question { margin-top: 11px; }
.reviewed-question > p { margin: 10px 0 0 45px; }
.auto-grade, .manual-grade, .teacher-question-comment { padding: 9px 11px; border-radius: 10px; }
.auto-grade.correct { color: #166534; background: #dcfce7; }
.auto-grade.wrong { color: #991b1b; background: #fee2e2; }
.manual-grade { color: #92400e; background: #fef3c7; }
.teacher-question-comment { color: #3730a3; background: #eef2ff; }
.grading-form { display: grid; gap: 16px; }
.grading-question + .grading-question { margin-top: 13px; }
.grading-answer-grid { margin: 14px 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; }
.grading-answer-grid > div { padding: 12px; border-radius: 12px; background: #f8fafc; }
.grading-answer-grid span, .grading-answer-grid strong { display: block; }
.grading-answer-grid span { margin-bottom: 5px; color: var(--muted); font-size: 11px; }
.grade-correct { color: #15803d; }
.grade-wrong { color: #b91c1c; }
.teacher-score-row { display: grid; grid-template-columns: 220px 1fr; gap: 10px; }

@media (max-width: 980px) {
  .homework-card-grid { grid-template-columns: 1fr 1fr; }
  .student-assignment-grid { grid-template-columns: 1fr 1fr; }
  .question-answer-editor { grid-template-columns: 1fr; }
  .permission-grid { grid-template-columns: 1fr; }
  .teacher-create-form { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .homework-upload-card { grid-template-columns: 1fr; }
  .homework-card-grid, .student-assignment-grid, .teacher-account-actions { grid-template-columns: 1fr; }
  .homework-upload-form, .teacher-create-form, .section-editor-heading > div { grid-template-columns: 1fr; }
  .homework-upload-form .wide { grid-column: auto; }
  .question-editor-top { grid-template-columns: 1fr; }
  .homework-take-heading, .homework-submit-panel { align-items: flex-start; flex-direction: column; }
  .file-homework-card, .submitted-file-card { align-items: flex-start; flex-direction: column; }
  .answer-upload-form { grid-template-columns: 1fr; }
  .answer-upload-form .button, .file-homework-card .button, .submitted-file-card .button { width: 100%; }
  .homework-submit-panel .button { width: 100%; }
  .homework-result-summary, .grading-answer-grid { grid-template-columns: 1fr; }
  .teacher-score-row { grid-template-columns: 1fr; }
  .inline-admin-form { align-items: stretch; flex-direction: column; }
  .sticky-editor-actions { display: grid; grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .homework-settings-card, .homework-section-editor, .homework-assign-card,
  .homework-section-block, .reviewed-section, .grading-section { padding: 20px 16px; }
  .question-editor-item, .student-question-item, .reviewed-question, .grading-question { padding: 16px 13px; }
  .reviewed-question > p { margin-left: 0; }
}