:root {
  --primary: #7c3aed;
  --primary-dark: #5b21b6;
  --primary-soft: #f3efff;
  --surface: #ffffff;
  --surface-soft: #f8f7fc;
  --text: #241b35;
  --muted: #665e73;
  --line: #e7e0f0;
  --success: #15803d;
  --danger: #dc2626;
  --shadow: 0 14px 36px rgba(76, 29, 149, 0.1);
  --radius: 18px;
}

* { box-sizing: border-box; }
html { min-width: 320px; min-height: 100%; scroll-behavior: smooth; }
body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--surface-soft);
  color: var(--text);
  font-family: Nunito, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.modal-open { overflow: hidden; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; }
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1, h2, h3 { margin-top: 0; }

.app-shell {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  min-height: 100vh;
}
.hero-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: 32px;
  overflow: hidden;
}
.brand { display: flex; align-items: center; font-weight: 900; }
.brand-mark { display: inline-grid; place-items: center; }
.side-menu { display: grid; }
.side-menu button { font: inherit; }
.hero-copy { position: relative; z-index: 2; }
.hero-copy h1 { font-weight: 900; }
.hero-copy h1 em { font-style: normal; }
.hero-footer { display: flex; align-items: center; }
.mascot { position: relative; }
.mascot .book, .mascot .face { display: none; }
.mascot::after {
  content: "🦉";
  position: absolute;
  display: grid;
  place-items: center;
  border: 5px solid rgba(255, 255, 255, 0.88);
  border-radius: 34% 34% 44% 44%;
  background: linear-gradient(145deg, #ede9fe, #c4b5fd);
  font-size: 70px;
  line-height: 1;
}
.spark { position: absolute; }
.s1 { right: 56%; top: 42px; }
.s2 { right: 7%; top: 8px; }

.content-panel { min-width: 0; min-height: 100vh; }
.screen { display: none; }
.screen.active { display: block; }
.eyebrow {
  display: inline-block;
  color: var(--primary-dark);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 1.15px;
}
.subtitle { color: var(--muted); }

/* Autenticação */
.auth-card { width: 100%; }
.auth-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  margin: 24px 0 20px;
}
.auth-tab {
  min-height: 44px;
  border: 0;
  background: transparent;
  font-weight: 900;
}
.auth-form { display: grid; gap: 16px; margin-top: 0; }
.auth-form[hidden] { display: none; }
.auth-form label { display: grid; gap: 7px; font-size: 13px; font-weight: 800; }
.auth-form input { width: 100%; padding: 13px 14px; }
.auth-form .start-button { width: 100%; margin-top: 4px; }
.auth-notice { min-height: 21px; margin: 16px 0 6px; font-size: 13px; font-weight: 800; }
.auth-notice.error { color: var(--danger); }
.auth-footnote { display: block; color: var(--muted); line-height: 1.5; }
.password-field { position: relative; display: block; }
.password-toggle { position: absolute; }

/* Matérias */
.subject-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.subject-card { width: 100%; }
.subject-art { display: grid; place-items: center; font-size: 31px; line-height: 1; }
.subject-card strong, .subject-card small { display: block; }
.subject-card i { display: grid; place-items: center; font-style: normal; }

/* Configuração */
.duo-topbar, .setup-actions, .duo-stats { display: flex; align-items: center; }
.duo-topbar { justify-content: space-between; }
.setup-actions, .duo-stats { gap: 10px; }
.back-subjects, .profile-mini { display: flex; align-items: center; gap: 8px; }
.profile-mini span { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; }
.duo-stats span { display: inline-flex; align-items: center; gap: 4px; padding: 7px 9px; }
.study-brief { display: flex; justify-content: space-between; gap: 22px; }
.study-brief h2 { margin: 7px 0; }
.enem-shortcut {
  display: grid;
  grid-template-columns: 34px 1fr;
  grid-template-rows: auto auto;
  align-items: center;
  min-width: 190px;
  padding: 12px 15px;
  text-align: left;
}
.enem-shortcut > span { grid-row: 1 / 3; font-size: 25px; }
.enem-shortcut b, .enem-shortcut small { display: block; }
.daily-mission { display: flex; align-items: center; gap: 13px; }
.daily-mission > div:nth-child(2) { display: grid; flex: 1; gap: 3px; }
.mission-icon { flex: 0 0 auto; }
.mini-progress { height: 7px; overflow: hidden; border-radius: 99px; background: #e9e5ef; }
.mini-progress i { display: block; width: 0; height: 100%; border-radius: inherit; background: var(--primary); }
.study-snapshot { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.snapshot-card { display: grid; gap: 7px; padding: 17px; }
.snapshot-card p { margin: 0; }
.plan-mini i, .subject-row i { display: block; overflow: hidden; height: 8px; border-radius: 99px; }
.plan-mini i b, .subject-row i b { display: block; height: 100%; border-radius: inherit; }
.quick-tools { display: flex; gap: 10px; }
.quick-tools button { flex: 1; min-height: 42px; }

#quiz-form { display: grid; gap: 17px; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.form-grid label { display: grid; align-content: start; }
.form-grid input, .form-grid select { width: 100%; min-width: 0; }
.optional-tag {
  display: inline-flex;
  width: max-content;
  margin-left: 6px;
  padding: 3px 7px;
  border-radius: 99px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.45px;
  text-transform: uppercase;
}
.input-help { display: block; margin-top: 7px; color: var(--muted); font-size: 11px; font-weight: 700; line-height: 1.4; }
.topic-examples { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.topic-examples > span { flex-basis: 100%; color: var(--muted); font-size: 12px; font-weight: 800; }
.topic-chip { min-height: 34px; padding: 6px 11px; border-radius: 99px; }
.school-year-hint, .curriculum-hint { margin: 0; }
.question-bank-promise { display: flex; align-items: center; gap: 8px; margin: 0; padding: 12px 14px; border: 1px solid #ddd2fb; border-radius: 13px; background: #f8f5ff; color: #55406f; line-height: 1.45; }
.question-bank-promise > span { display: grid; flex: 0 0 30px; width: 30px; height: 30px; place-items: center; border-radius: 10px; background: #7c3aed; color: #fff; font-size: 20px; font-weight: 900; }
.question-bank-promise.error { border-color: #ef9a9a; background: #fff4f4; color: #8b2635; font-weight: 700; }
fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
legend { margin-bottom: 10px; }
.choice-row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.choice { padding: 9px 12px; }
.dot { display: inline-block; width: 9px; height: 9px; margin-right: 5px; border-radius: 50%; }
.dot.green { background: #22c55e; }
.dot.yellow { background: #f59e0b; }
.dot.red { background: #ef4444; }
.start-button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; padding: 13px 20px; cursor: pointer; }
.start-button span { font-size: 18px; }
.topline { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.step-pill { font-size: 10px; font-weight: 900; letter-spacing: 0.8px; }
.text-button, .result-home { border: 0; background: transparent; }

/* Quiz */
.quiz-header { display: grid; grid-template-columns: auto minmax(140px, 1fr) auto auto; align-items: center; gap: 14px; }
.quiz-header > div:nth-child(2) { display: grid; gap: 7px; }
.progress { overflow: hidden; border-radius: 99px; }
.progress i { display: block; height: 100%; border-radius: inherit; transition: width 0.3s ease; }
.score { white-space: nowrap; }
.score small { display: block; font-size: 8px; font-weight: 900; letter-spacing: 0.7px; }
.score strong { font-size: 18px; }
.quiz-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.quiz-tag, .quiz-skill { padding: 7px 10px; border-radius: 10px; font-size: 10px; font-weight: 900; }
.question-tools { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.question-tools button { min-height: 35px; padding: 6px 10px; border-radius: 10px; background: #fff; }
.question-tools button.active { color: var(--primary-dark) !important; }
.answers { display: grid; gap: 12px; }
.answer { display: grid; grid-template-columns: 36px minmax(0, 1fr); align-items: center; gap: 12px; width: 100%; text-align: left; }
.answer .letter { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 9px; font-weight: 900; }
.answer.selected-answer { border-color: var(--primary) !important; background: var(--primary-soft) !important; }
.open-response { width: 100%; min-height: 150px; padding: 14px; resize: vertical; }
.small-action { min-height: 40px; padding: 9px 14px; border-radius: 11px; }
.feedback { display: grid; gap: 10px; margin-top: 18px; padding: 17px; line-height: 1.6; }
.feedback > strong { display: block; font-size: 17px; }
.option-correction { margin: 0; padding: 11px 13px; border-radius: 12px; background: rgba(255,255,255,.72); font-weight: 700; }
.question-source { width: max-content; max-width: 100%; }
.feedback-actions { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 5px; }
.feedback-actions button { min-height: 34px; padding: 6px 10px; border: 1px solid currentColor; border-radius: 9px; background: rgba(255,255,255,.72); color: inherit; }
.feedback-actions button.selected { background: currentColor; color: #fff; }
.explanation-extra { margin: 0; padding-top: 4px; }
.achievement-toast { display: grid; gap: 4px; margin-top: 16px; padding: 14px 16px; }
#next-question { width: 100%; margin-top: 20px; }

/* Resultado */
.result-screen { text-align: center; }
.result-screen .trophy { margin-bottom: 20px; }
.result-screen h2 { margin: 9px 0; }
.phase-result { margin: 17px 0; font-weight: 800; }
.result-score { display: grid; place-items: center; width: 145px; height: 145px; margin: 20px auto; border-radius: 50%; }
.result-score strong { font-size: 45px; line-height: 1; }
.result-score span { font-size: 12px; font-weight: 900; text-transform: uppercase; }
.result-stats { display: grid; grid-template-columns: 1fr 1fr; margin: 18px 0; }
.result-stats > div { display: grid; gap: 3px; padding: 8px; }
.result-stats > div + div { border-left: 1px solid var(--line); }
.result-stats strong { font-size: 25px; }
.result-stats span { color: var(--muted); font-size: 12px; }
.result-screen .start-button { width: 100%; }
.result-home { margin-top: 15px; }

/* Perfil, painel e revisão */
.dashboard-header { display: flex; align-items: flex-start; gap: 14px; }
.dashboard-header h2 { margin: 4px 0 0; }
.icon-button { display: grid; place-items: center; flex: 0 0 auto; min-width: 42px; min-height: 42px; }
.profile-card { display: flex; align-items: center; gap: 14px; padding: 18px; }
.profile-avatar { display: grid; place-items: center; flex: 0 0 auto; width: 60px; height: 60px; border-radius: 18px; font-size: 34px; }
.profile-card > div:nth-child(2) { display: grid; gap: 3px; }
.profile-card > div:nth-child(2) strong { font-size: 19px; }
.profile-card > div:nth-child(2) span { color: var(--muted); font-size: 12px; }
.dashboard-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 11px; margin: 15px 0; }
.dashboard-stats article { display: grid; gap: 3px; padding: 14px; }
.dashboard-stats article > span { color: var(--muted); font-size: 9px; font-weight: 900; letter-spacing: 0.7px; }
.dashboard-stats article strong { font-size: 25px; }
.dashboard-stats article small { color: var(--muted); }
.focus-card { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px; color: #fff; }
.focus-card > div { display: grid; gap: 5px; }
.focus-card .eyebrow, .focus-card p { color: rgba(255,255,255,.82); }
.focus-card p { margin: 0; }
.focus-card button { flex: 0 0 auto; padding: 10px 13px; border: 0; border-radius: 11px; background: #fff; color: var(--primary-dark); font-weight: 900; }
.dashboard-screen h3, .review-screen h3 { margin: 28px 0 11px; font-size: 17px; }
.avatar-picker, .accessibility-card { display: flex; flex-wrap: wrap; gap: 10px; }
.avatar-option { position: relative; display: grid; place-items: center; width: 62px; height: 62px; border: 2px solid var(--line); border-radius: 17px; background: #fff; font-size: 30px; }
.avatar-option.selected { border-color: var(--primary); background: var(--primary-soft); }
.avatar-option.locked { filter: grayscale(1); opacity: .58; }
.avatar-option small { position: absolute; right: -3px; bottom: -3px; font-size: 12px; }
.rewards-list, .subject-progress, #review-list, #error-notebook, .saved-questions, .review-queue, #teacher-material-list { display: grid; gap: 10px; }
.reward, .saved-entry, .review-item-card, .notebook-entry, .material-entry { display: flex; align-items: center; gap: 12px; padding: 13px; }
.reward-icon, .saved-icon, .review-date { display: grid; place-items: center; flex: 0 0 auto; width: 42px; height: 42px; border-radius: 12px; }
.reward > div:nth-child(2), .saved-entry > div:nth-child(2), .review-item-card > div:nth-child(2), .material-entry { display: grid; flex: 1; gap: 3px; }
.reward span, .saved-entry small, .review-item-card span, .material-entry span { color: var(--muted); font-size: 11px; }
.reward > b { color: var(--primary-dark); font-size: 11px; }
.reward.locked { opacity: .56; filter: grayscale(.6); }
.saved-entry > button { margin-left: auto; border: 0; background: transparent; color: var(--muted); font-size: 20px; }
.subject-row { display: grid; gap: 7px; }
.subject-row > div { display: flex; justify-content: space-between; gap: 12px; font-size: 12px; font-weight: 800; }
.review-card, .plan-card, .notebook-card, .ranking-card, .teacher-card, .accessibility-card { padding: 17px; }
.review-card p, .teacher-card p { margin-top: 0; }
.review-card > small { display: block; margin-top: 12px; color: var(--muted); line-height: 1.5; }
.review-item, .notebook-entry { justify-content: space-between; }
.plan-card { display: flex; flex-wrap: wrap; align-items: end; gap: 14px; }
.week-picker { display: flex; flex: 1 1 280px; gap: 7px; }
.day-button { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--line); border-radius: 11px; background: #fff; }
.day-button.selected { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark); }
.plan-card label { display: grid; gap: 5px; font-size: 11px; }
.plan-card select { min-height: 40px; padding: 7px 10px; }
.ranking-card { display: flex; justify-content: space-between; gap: 14px; margin-top: 12px; }
.notebook-card .small-action { margin-top: 12px; }
.access-control { flex: 1 1 160px; min-height: 42px; border: 1px solid var(--line); border-radius: 11px; background: #fff; }
.access-control.selected { border-color: var(--primary); background: rgba(109, 40, 217, .08); color: var(--primary-dark); box-shadow: inset 0 0 0 1px rgba(109, 40, 217, .08); }
.preference-control { font-weight: 800; }
.quiz-sound-toggle.muted { opacity: .78; }
.plans-screen { gap: 18px; width: 100%; min-width: 0; overflow: clip; }
.plans-screen:not(.active) { display: none !important; }
.plans-screen.active { display: grid; }
.plans-header { grid-template-columns: auto minmax(0, 1fr); }
.plans-header > div { min-width: 0; }
.plans-header h2 { margin: 3px 0 0; overflow-wrap: anywhere; }
.plans-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; padding: 6px; border: 1px solid var(--line); border-radius: 16px; background: #f7f4fb; }
.plans-tabs button { min-width: 0; min-height: 46px; padding: 9px 12px; border: 0; border-radius: 11px; background: transparent; color: var(--muted); font-weight: 900; line-height: 1.2; }
.plans-tabs button.selected { background: #fff; color: var(--primary-dark); box-shadow: 0 4px 14px rgba(58, 28, 89, .1); }
.plans-payment-notice { padding: 13px 16px; border: 1px solid #cfc1ee; border-radius: 14px; background: #f5f0ff; color: var(--primary-dark); font-weight: 800; line-height: 1.45; text-align: center; }
.plans-payment-notice.error { border-color: #efb7b7; background: #fff3f3; color: #9f2929; }
.plans-payment-notice.success { border-color: #9bd9ad; background: #effbf2; color: #236b39; }
.plans-tab-panel { display: grid; gap: 18px; min-width: 0; }
.plans-tab-panel[hidden] { display: none !important; }
.plans-intro { display: grid; gap: 5px; text-align: center; }
.plans-intro span, .plans-commercial-card > span { color: var(--primary); font-size: 11px; font-weight: 900; letter-spacing: .08em; }
.plans-intro h3, .plans-commercial-card h3 { margin: 0; font-size: clamp(22px, 3vw, 30px); line-height: 1.15; }
.plans-intro p, .plans-commercial-card p { margin: 2px auto 0; max-width: 680px; color: var(--muted); line-height: 1.55; }
.plans-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: stretch; gap: 14px; min-width: 0; }
.plan-card-item { display: grid; grid-template-rows: auto auto 1fr auto; gap: 12px; min-width: 0; padding: 20px; border: 1px solid var(--line); border-radius: 20px; background: #fff; overflow: hidden; }
.plan-card-item.primary { border: 2px solid var(--primary); background: linear-gradient(180deg, #fbf9ff 0%, #fff 42%); box-shadow: 0 14px 30px rgba(109, 40, 217, .12); }
.plan-card-item.highlight { border-color: #d9cdf0; }
.plan-card-top { display: grid; gap: 5px; }
.plan-card-top span { color: var(--primary); font-size: 10px; font-weight: 900; letter-spacing: .08em; }
.plan-card-top strong { font-size: 24px; line-height: 1.1; }
.plan-card-price { display: grid; gap: 3px; min-width: 0; }
.plan-card-price b { color: var(--primary-dark); font-size: clamp(24px, 3vw, 31px); line-height: 1; overflow-wrap: anywhere; }
.plan-card-price small { color: var(--muted); line-height: 1.35; }
.plan-card-item ul { display: grid; align-content: start; gap: 9px; margin: 2px 0 8px; padding: 0; list-style: none; }
.plan-card-item li { position: relative; padding-left: 23px; color: var(--text); line-height: 1.4; }
.plan-card-item li::before { content: '✓'; position: absolute; left: 0; color: var(--primary); font-weight: 900; }
.plan-card-item button { width: 100%; min-height: 46px; padding: 10px 12px; border-radius: 12px; }
.plan-card-item button:disabled { border-color: var(--line); background: #f2eff5; color: var(--muted); box-shadow: none; cursor: default; opacity: .82; }
.plan-card-actions { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.plan-card-actions button:last-child { background: #fff; color: var(--primary-dark); box-shadow: inset 0 0 0 2px var(--primary); }
.plan-card-actions button:last-child:hover { background: var(--primary-soft); }
.plans-credit-purchase { display: grid; gap: 16px; width: min(100%, 720px); margin: 0 auto; padding: 22px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.credit-choice-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.credit-choice-list button { position: relative; display: grid; gap: 5px; min-width: 0; min-height: 90px; padding: 15px 10px; border: 2px solid var(--line); border-radius: 14px; background: #fff; color: var(--text); text-align: center; }
.credit-choice-list button.selected { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark); }
.credit-choice-list strong, .credit-choice-list span { overflow-wrap: anywhere; }
.credit-choice-list small { color: var(--primary-dark); font-size: 10px; font-weight: 900; }
.plans-credit-purchase > .start-button { width: 100%; min-height: 50px; }
.credit-purchase-note { color: var(--muted); text-align: center; line-height: 1.4; }
.premium-report-upgrade { display: flex; align-items: center; gap: 14px; margin: 22px 0; padding: 18px; border: 1px solid #d9cef8; border-radius: 18px; background: linear-gradient(135deg, #f8f5ff, #fff); }
.premium-report-upgrade > span { display: grid; place-items: center; flex: 0 0 44px; width: 44px; height: 44px; border-radius: 14px; background: #ede7ff; color: var(--primary); font-size: 22px; }
.premium-report-upgrade > div { flex: 1; min-width: 0; }
.premium-report-upgrade strong, .premium-report-upgrade p { display: block; margin: 0; }
.premium-report-upgrade p { margin-top: 3px; color: var(--muted); line-height: 1.4; }
.premium-report-upgrade button { min-height: 42px; padding: 0 15px; border: 0; border-radius: 12px; background: var(--primary); color: #fff; font-weight: 900; }
.plans-commercial-card { display: grid; justify-items: center; gap: 12px; width: min(100%, 720px); margin: 12px auto 0; padding: clamp(24px, 5vw, 42px); border: 1px solid var(--line); border-radius: 22px; background: linear-gradient(145deg, #fff 0%, #f5efff 100%); text-align: center; }
.plans-commercial-card .start-button { width: min(100%, 330px); margin-top: 6px; }
body[data-screen="plans-screen"] .hero-footer,
body[data-screen="plans-screen"] .side-mascot-interactive,
body[data-screen="plans-screen"] .side-mascot-card,
body[data-screen="plans-screen"] .hero-copy { display: none !important; }
body[data-screen="plans-screen"] .hero-panel { justify-content: flex-start; gap: 18px; }
.teacher-card { display: grid; gap: 10px; }
.teacher-card input, .teacher-card textarea { width: 100%; padding: 12px 13px; }
.teacher-card textarea { min-height: 100px; resize: vertical; }
.review-steps { display: flex; align-items: center; justify-content: center; gap: 10px; margin: 22px 0; }
.review-steps span { padding: 7px 10px; border-radius: 99px; background: #f0edf4; color: var(--muted); font-size: 11px; font-weight: 900; }
.review-steps span.active { background: var(--primary-soft); color: var(--primary-dark); }
.review-steps i { width: 35px; height: 3px; border-radius: 99px; background: var(--line); }
.review-highlight { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px; }
.review-highlight > div { display: grid; gap: 3px; }
.review-highlight > div > span { color: var(--muted); font-size: 10px; font-weight: 900; letter-spacing: .7px; }
.review-highlight > div > strong { color: var(--primary-dark); font-size: 40px; }
.review-highlight > div > small { color: var(--muted); }
.review-item-card button { margin-left: auto; padding: 8px 11px; border: 0; border-radius: 10px; background: var(--primary-soft); color: var(--primary-dark); font-weight: 900; }
.review-item-card.empty { display: block; color: var(--muted); text-align: center; }
.empty-review { padding: 16px; color: var(--muted); text-align: center; }

/* Modal padrão */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(31, 18, 53, .58);
  backdrop-filter: blur(9px);
}
.modal-panel {
  position: relative;
  width: min(100%, 500px);
  max-height: calc(100dvh - 36px);
  overflow: auto;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: #fff;
  box-shadow: 0 28px 80px rgba(35, 17, 67, .28);
  animation: modal-in .22s ease both;
}
.modal-close { position: absolute; top: 16px; right: 16px; display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 12px; background: #fff; color: var(--muted); font-size: 23px; }
.modal-icon { display: grid; place-items: center; width: 58px; height: 58px; margin-bottom: 17px; border-radius: 18px; background: var(--primary-soft); font-size: 29px; }
.modal-panel h2 { margin: 7px 50px 8px 0; font-size: 30px; }
.modal-panel > p { margin: 0; color: var(--muted); line-height: 1.55; }
.modal-form { display: grid; gap: 9px; margin-top: 22px; }
.modal-form label { font-size: 12px; font-weight: 900; }
.modal-form input { width: 100%; min-height: 52px; padding: 12px 14px; }
.modal-error { min-height: 20px; margin: 0; color: var(--danger); font-size: 12px; font-weight: 800; }
.modal-actions { display: grid; grid-template-columns: 1fr 1.35fr; gap: 10px; margin-top: 4px; }
.modal-secondary { min-height: 50px; border: 1px solid var(--line); border-radius: 14px; background: #fff; color: var(--muted); font-weight: 900; }
@keyframes modal-in { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: none; } }

/* Navegação móvel */
.app-nav { position: fixed; z-index: 50; left: 50%; display: flex; align-items: center; gap: 4px; transform: translateX(-50%); }
.app-nav button { position: relative; display: grid; place-items: center; gap: 1px; border: 0; background: transparent; font-size: 10px; font-weight: 900; }
.app-nav button > span { font-size: 21px; }
.app-nav button > b { position: absolute; top: 1px; right: 5px; display: grid; place-items: center; min-width: 17px; height: 17px; border-radius: 99px; background: var(--danger); color: #fff; font-size: 9px; }

/* Acessibilidade */
body.a11y-large { font-size: 118%; }
body.a11y-contrast { --text: #130a20; --muted: #403749; --line: #7b7185; }
body.a11y-calm *, body.a11y-calm *::before, body.a11y-calm *::after { animation: none !important; transition: none !important; }

@media (max-width: 820px) {
  .form-grid { grid-template-columns: 1fr; }
  .quiz-header { grid-template-columns: auto minmax(120px, 1fr) auto; }
  .listen-button { display: none; }
  .dashboard-stats { grid-template-columns: 1fr; }
  .plans-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .subject-grid, .choice-row, .study-snapshot { grid-template-columns: 1fr; }
  .study-brief, .focus-card, .review-highlight { align-items: stretch; flex-direction: column; }
  .quick-tools { flex-direction: column; }
  .plans-tabs { grid-template-columns: 1fr; }
  .plans-tabs button { min-height: 42px; }
  .plans-credit-purchase { padding: 16px; }
  .credit-choice-list { grid-template-columns: 1fr; }
  .credit-choice-list button { min-height: 68px; }
  .premium-report-upgrade { align-items: flex-start; flex-wrap: wrap; }
  .premium-report-upgrade button { width: 100%; }
  .plan-card-actions { grid-template-columns: 1fr; }
  .result-stats { grid-template-columns: 1fr 1fr; }
  .modal-backdrop { place-items: end center; padding: 0; }
  .modal-panel { width: 100%; max-height: 90dvh; padding: 25px 20px max(24px, env(safe-area-inset-bottom)); border-radius: 25px 25px 0 0; }
  .modal-actions { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}