/* =====================================================================
   Leuro - Design System
   "Playful" structure (warm cream canvas, 44px cards, pill buttons,
   dual-layer shadows, italic display headings) with Leuro brand colors:
   Twilight Purple #5A3E76 (primary/headers), Eureka Gold #E6B347 (accent).
   Font: Inter (fallback Poppins).
   Mobile-first (tested at 375px), scales up to tablet/desktop.
   ===================================================================== */

:root {
  /* Leuro brand colors */
  --primary: #5A3E76;
  --primary-dark: #432d59;
  --primary-light: #7a5b9c;
  --accent: #E6B347;
  --accent-dark: #c9982f;
  --bg: #F9F9F7;
  --text: #363636;
  --text-muted: rgba(54, 54, 54, 0.6);
  --border: #E0D8EC;
  --white: #ffffff;
  --danger: #d9534f;
  --success: #4caf50;
  --warning: #f0ad4e;

  /* Legacy aliases kept so existing declarations below stay readable */
  --purple: var(--primary);
  --purple-dark: var(--primary-dark);
  --purple-light: var(--primary-light);
  --gold: var(--accent);
  --gold-dark: var(--accent-dark);

  /* Playful typography */
  --font-inter: 'Inter', 'Poppins', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-display: 70px;
  --font-size-heading: 30px;
  --font-size-subheading: 26px;
  --font-size-body: 16px;
  --font-size-caption: 14px;
  --line-height-display: 1;
  --line-height-heading: 1.2;
  --line-height-body: 1.5;
  --letter-spacing-tight: -0.002em;

  /* Playful spacing scale */
  --spacing-4: 4px;
  --spacing-8: 8px;
  --spacing-12: 12px;
  --spacing-16: 16px;
  --spacing-20: 20px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-36: 36px;
  --spacing-60: 60px;
  --spacing-80: 80px;

  /* Playful shapes */
  --radius-card: 44px;
  --radius-button: 99px;
  --radius-input: 99px;
  --radius-image: 16px;
  --radius-tag: 999px;
  --radius-md: 24px;

  /* Legacy radius aliases */
  --radius: var(--radius-card);
  --radius-sm: var(--radius-md);

  /* Playful shadows (dual-layer) */
  --shadow-soft: rgba(54, 54, 54, 0.1) 0px 2px 8px 0px;
  --shadow-medium: rgba(54, 54, 54, 0.15) 0px 8px 24px 0px;
  --shadow-large: rgba(54, 54, 54, 0.22) 0px 32px 80px 0px, rgba(54, 54, 54, 0.08) 0px 2px 8px 0px;

  /* Legacy shadow aliases */
  --shadow: var(--shadow-soft);
  --shadow-lg: var(--shadow-large);

  --nav-height: 68px;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
}

body {
  font-family: var(--font-inter);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: var(--line-height-body);
  letter-spacing: var(--letter-spacing-tight);
  -webkit-font-smoothing: antialiased;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

a { color: var(--primary); }

img, svg { max-width: 100%; display: block; }

h1, h2, h3, h4 {
  font-family: var(--font-inter);
  font-weight: 700;
  line-height: var(--line-height-heading);
  margin: 0 0 8px;
  color: var(--text);
}

/* ---------------------------------------------------------------------
   Layout
   --------------------------------------------------------------------- */

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding-bottom: calc(var(--nav-height) + var(--spacing-16));
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
}

.screen.no-nav-padding { padding-bottom: var(--spacing-16); }

.container {
  padding: var(--spacing-16);
}

/* ---------------------------------------------------------------------
   Offline banner
   --------------------------------------------------------------------- */

.offline-banner {
  background: var(--warning);
  color: #4a3300;
  text-align: center;
  font-weight: 600;
  font-size: 13px;
  padding: var(--spacing-8) var(--spacing-12);
  position: sticky;
  top: 0;
  z-index: 200;
}

.hidden { display: none !important; }

/* ---------------------------------------------------------------------
   Auth screen
   --------------------------------------------------------------------- */

.auth-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-32) var(--spacing-20);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.auth-logo {
  font-family: var(--font-inter);
  font-size: 40px;
  font-weight: 900;
  font-style: italic;
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-display);
  color: var(--primary);
  margin-bottom: var(--spacing-8);
}

.auth-logo .tm { font-size: 16px; vertical-align: super; font-style: normal; }

.auth-tagline {
  font-size: var(--font-size-body);
  font-weight: 400;
  margin-bottom: var(--spacing-32);
  color: var(--text-muted);
  text-align: center;
  max-width: 320px;
}

.auth-card {
  background: var(--white);
  color: var(--text);
  border-radius: var(--radius-card);
  width: 100%;
  max-width: 400px;
  padding: var(--spacing-24);
  box-shadow: var(--shadow-large);
}

.auth-card h3 {
  font-style: italic;
  font-weight: 700;
  font-size: 24px;
  color: var(--primary);
  margin-bottom: var(--spacing-16);
}

.auth-tabs {
  display: flex;
  gap: var(--spacing-4);
  border-radius: var(--radius-button);
  background: var(--bg);
  padding: var(--spacing-4);
  margin-bottom: var(--spacing-20);
  overflow: hidden;
}

.auth-tab {
  flex: 1;
  border: none;
  background: transparent;
  padding: 10px;
  font-weight: 600;
  font-family: var(--font-inter);
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-button);
}

.auth-tab.active {
  background: var(--primary);
  color: var(--white);
}

/* ---------------------------------------------------------------------
   Forms
   --------------------------------------------------------------------- */

.field { margin-bottom: var(--spacing-16); }

.field label {
  display: block;
  font-weight: 600;
  font-size: var(--font-size-caption);
  margin-bottom: var(--spacing-8);
  color: var(--text);
}

.field input,
.field select {
  width: 100%;
  padding: 14px 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-input);
  background: var(--bg);
  color: var(--text);
  font-size: var(--font-size-body);
}

/* Textareas keep a softer (non-pill) radius - a true 99px radius on a
   multi-line box would clip the corners into the text area. */
.field textarea {
  width: 100%;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-image);
  background: var(--bg);
  color: var(--text);
  font-size: var(--font-size-body);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid var(--primary-light);
  outline-offset: 1px;
}

.field textarea { resize: vertical; min-height: 90px; }

/* Live password strength hint shown under the signup password field.
   Colour signals length: red (too short / blocked), orange (ok),
   green (strong). Empty hint collapses to nothing. */
.pw-hint {
  margin: var(--spacing-8) 0 0;
  font-size: var(--font-size-caption);
  font-weight: 600;
  min-height: 1em;
}
.pw-hint-short { color: #d92d20; }
.pw-hint-ok { color: #e07b00; }
.pw-hint-strong { color: #12805c; }

.field-row { display: flex; gap: var(--spacing-12); }
.field-row .field { flex: 1; }

.radio-group { display: flex; gap: var(--spacing-12); }
.radio-option {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: var(--radius-button);
  padding: 12px;
  text-align: center;
  cursor: pointer;
  font-weight: 600;
  font-size: var(--font-size-caption);
}
.radio-option.selected {
  border-color: var(--primary);
  background: rgba(90, 62, 118, 0.08);
  color: var(--primary);
}

/* ---------------------------------------------------------------------
   Buttons
   --------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);
  width: 100%;
  border: none;
  border-radius: var(--radius-button);
  padding: 14px 24px;
  font-weight: 600;
  font-family: var(--font-inter);
  font-size: var(--font-size-body);
  cursor: pointer;
  transition: opacity 0.15s, transform 0.05s;
  text-decoration: none;
}

.btn:active { transform: scale(0.98); }

.btn-primary { background: var(--primary); color: var(--white); }
.btn-gold { background: var(--accent); color: var(--primary-dark); }
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-danger { background: transparent; color: var(--danger); border: 1.5px solid var(--danger); }
.btn-sm { padding: 10px 18px; font-size: var(--font-size-caption); width: auto; }
.btn-block { width: 100%; }

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn .spinner { margin-right: var(--spacing-4); }

/* Forgot-password link below the login form and back-link below forgot form */
.forgot-link {
  margin-top: var(--spacing-16);
  text-align: center;
  font-size: var(--font-size-caption);
}

/* Unstyled inline button that looks like a link */
.btn-link {
  background: none;
  border: none;
  color: var(--primary);
  font-size: inherit;
  font-family: inherit;
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
}
.btn-link:hover { opacity: 0.8; }

/* Neutral confirmation message (e.g. reset-email-sent) */
.auth-info-msg {
  font-size: var(--font-size-body);
  color: var(--text-muted);
  margin: var(--spacing-16) 0 var(--spacing-24);
  line-height: 1.6;
  text-align: center;
}

/* Legal consent checkboxes on the signup form */
.legal-checkboxes {
  margin-bottom: var(--spacing-16);
}
.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-8);
  font-size: var(--font-size-caption);
  color: var(--text);
  margin-bottom: var(--spacing-12);
  cursor: pointer;
  line-height: 1.5;
}
.checkbox-label:last-child { margin-bottom: 0; }
.checkbox-label input[type="checkbox"] {
  margin-top: 2px;
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

/* Legal section links in Account tab */
.legal-section-link {
  display: block;
  margin-bottom: var(--spacing-8);
  font-size: var(--font-size-body);
  text-decoration: none;
}
.legal-section-link:last-child { margin-bottom: 0; }

/* Legal modal body — slightly smaller text for dense policy content */
.legal-modal-body h4 {
  margin: var(--spacing-16) 0 var(--spacing-4);
  font-size: var(--font-size-body);
}
.legal-modal-body p { margin: 0 0 var(--spacing-8); font-size: var(--font-size-caption); line-height: 1.6; }
.legal-modal-body ul { margin: 0 0 var(--spacing-8); padding-left: var(--spacing-16); font-size: var(--font-size-caption); line-height: 1.7; }
.legal-modal-body li { margin-bottom: var(--spacing-4); }
.legal-table { width: 100%; border-collapse: collapse; font-size: var(--font-size-caption); margin: 0 0 var(--spacing-8); }
.legal-table th, .legal-table td { text-align: left; padding: var(--spacing-4) var(--spacing-8); border: 1px solid rgba(0,0,0,0.15); vertical-align: top; }
.legal-table th { background: rgba(90,62,118,0.08); font-weight: 600; }

/* ---------------------------------------------------------------------
   Header / top bar
   --------------------------------------------------------------------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-16) var(--spacing-20);
  background: var(--primary);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-logo {
  font-family: var(--font-inter);
  font-size: 22px;
  font-weight: 800;
  font-style: italic;
  letter-spacing: var(--letter-spacing-tight);
}
.topbar-logo .tm { font-size: 11px; vertical-align: super; font-style: normal; }

.topbar-actions { display: flex; align-items: center; gap: var(--spacing-8); }

.lang-toggle {
  background: rgba(255,255,255,0.15);
  color: var(--white);
  border: none;
  border-radius: var(--radius-tag);
  padding: 6px 14px;
  font-weight: 600;
  font-size: 12px;
  cursor: pointer;
}

/* ---------------------------------------------------------------------
   Bottom nav
   --------------------------------------------------------------------- */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--white);
  border-top: 1px solid var(--border);
  display: flex;
  z-index: 100;
  max-width: 720px;
  margin: 0 auto;
  box-shadow: var(--shadow-medium);
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-4);
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-inter);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  padding: 6px;
  position: relative;
}

.nav-item .nav-icon { font-size: 20px; line-height: 1; }

.nav-item.active { color: var(--primary); font-weight: 600; }
.nav-item.active .nav-icon { color: var(--accent); }

/* Underline-style active indicator, Eureka Gold */
.nav-item.active::before {
  content: "";
  position: absolute;
  top: 0;
  left: 25%;
  right: 25%;
  height: 3px;
  border-radius: 0 0 var(--radius-tag) var(--radius-tag);
  background: var(--accent);
}

/* ---------------------------------------------------------------------
   Cards & general components
   --------------------------------------------------------------------- */

.card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: var(--spacing-24);
  margin-bottom: var(--spacing-16);
  box-shadow: var(--shadow-medium);
}

.card h3 { margin: 0 0 var(--spacing-8); font-size: 18px; font-weight: 700; }
.card p { margin: 0; color: var(--text-muted); font-size: var(--font-size-caption); }

/* Main tab display headlines (Learn / Exams / Account / Parent) */
.screen-title {
  font-style: italic;
  font-weight: 800;
  font-size: 28px;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--primary);
}

.section-title {
  font-size: 16px;
  font-weight: 700;
  font-family: var(--font-inter);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--primary);
  margin: var(--spacing-24) 0 var(--spacing-12);
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-inter);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.badge-gold { background: rgba(230, 179, 71, 0.2); color: var(--accent-dark); }
.badge-purple { background: rgba(90, 62, 118, 0.12); color: var(--primary); }
.badge-success { background: rgba(76, 175, 80, 0.15); color: #2e7d32; }
.badge-danger { background: rgba(217, 83, 79, 0.12); color: var(--danger); }
.badge-muted { background: var(--border); color: var(--text-muted); }

/* A <button> can wear the same pill look as a status .badge (e.g. Retake
   Diagnostic sitting alongside the Sessions-today badge) - this just resets
   the browser's default button chrome so the badge/badge-* rules render
   identically on a button as on a span. */
button.badge {
  border: none;
  cursor: pointer;
  transition: opacity 0.15s ease;
}
button.badge:hover { opacity: 0.75; }

.level-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  font-weight: 700;
  font-size: 15px;
}

/* Topic list */

.topic-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-20);
  background: var(--white);
  border-radius: var(--radius-card);
  margin-bottom: var(--spacing-12);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  border: 1px solid transparent;
}

.topic-item:active { border-color: var(--primary-light); }

.topic-info { flex: 1; min-width: 0; }
.topic-title { font-weight: 600; font-size: var(--font-size-body); margin-bottom: var(--spacing-4); }
.topic-subject { font-size: var(--font-size-caption); color: var(--text-muted); }

.topic-count {
  font-size: var(--font-size-caption);
  font-weight: 700;
  color: var(--primary);
  white-space: nowrap;
  margin-left: var(--spacing-12);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--spacing-32) var(--spacing-16);
  color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 36px; margin-bottom: var(--spacing-8); }

/* ---------------------------------------------------------------------
   Home / Dashboard tab
   --------------------------------------------------------------------- */

.avatar-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary-dark);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0;
}

.home-greeting-card { padding: var(--spacing-20) var(--spacing-24); }
.home-greeting {
  font-style: italic;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--primary);
}

.streak-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  padding: var(--spacing-16) var(--spacing-24);
}
.streak-flame { font-size: 28px; line-height: 1; }
.streak-text { font-weight: 800; font-size: 18px; color: var(--accent-dark); }

.sessions-today-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 600;
  margin-bottom: var(--spacing-12);
}
.sessions-today-count { color: var(--primary); font-weight: 800; }

.progress-bar-fill-purple { background: var(--primary); }

.quick-actions {
  display: flex;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-16);
}

.quick-action-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-8);
  background: var(--white);
  border: none;
  border-radius: var(--radius-card);
  padding: var(--spacing-16) var(--spacing-8);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  font-family: var(--font-inter);
  text-align: center;
}
.quick-action-card:active { transform: scale(0.98); }
.quick-action-icon { font-size: 26px; line-height: 1; }
.quick-action-label {
  font-weight: 700;
  font-size: 12px;
  color: var(--text);
  letter-spacing: var(--letter-spacing-tight);
}

.progress-summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-12);
}

.plan-banner {
  display: block;
  width: 100%;
  background: transparent;
  border: none;
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
  text-align: center;
  padding: var(--spacing-12);
  cursor: pointer;
  font-family: var(--font-inter);
}

/* ---------------------------------------------------------------------
   Session / Modal overlay
   --------------------------------------------------------------------- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(54, 54, 54, 0.5);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  z-index: 300;
}

.modal-sheet {
  background: var(--bg);
  width: 100%;
  max-width: 720px;
  max-height: 92vh;
  border-radius: 32px 32px 0 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: slideUp 0.2s ease-out;
  box-shadow: var(--shadow-large);
}

@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-16) var(--spacing-20);
  background: var(--primary);
  color: var(--white);
}

.modal-header h3 { margin: 0; font-size: 16px; font-style: normal; color: var(--white); }

.modal-close {
  background: rgba(255,255,255,0.15);
  border: none;
  color: var(--white);
  width: 30px;
  height: 30px;
  border-radius: 50%;
  font-size: 16px;
  cursor: pointer;
}

.modal-body {
  padding: var(--spacing-20);
  overflow-y: auto;
}

.modal-footer {
  padding: var(--spacing-12) var(--spacing-20);
  border-top: 1px solid var(--border);
  background: var(--white);
}

.ai-bubble {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: var(--spacing-20);
  box-shadow: var(--shadow-soft);
  white-space: pre-wrap;
  font-size: var(--font-size-caption);
  line-height: 1.6;
}

/* ---------------------------------------------------------------------
   Learn tab - chat interface
   --------------------------------------------------------------------- */

.chat-sheet {
  height: 92vh;
}

.chat-header-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
}
.chat-header-info h3 { color: var(--white); }

.chat-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.chat-row {
  display: flex;
  gap: var(--spacing-8);
  align-items: flex-end;
}
.chat-row-ai { justify-content: flex-start; }
.chat-row-learner { justify-content: flex-end; }

.chat-avatar {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
}

.chat-bubble {
  max-width: 78%;
  padding: var(--spacing-12) var(--spacing-16);
  border-radius: var(--radius-card);
  white-space: pre-wrap;
  font-size: var(--font-size-caption);
  line-height: 1.6;
}

.chat-bubble-ai {
  background: var(--white);
  box-shadow: var(--shadow-soft);
  border-bottom-left-radius: 6px;
}

.chat-bubble-learner {
  background: var(--primary);
  color: var(--white);
  border-bottom-right-radius: 6px;
}

.chat-bubble-safety {
  background: #fff4f0;
  border: 1.5px solid var(--danger);
  color: #5a2a26;
}

.chat-typing {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
  color: var(--text-muted);
}

.chat-answer-box {
  margin: 0 0 0 40px;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
}
.chat-answer-box textarea {
  width: 100%;
  padding: var(--spacing-12) var(--spacing-16);
  border: 1px solid var(--border);
  border-radius: var(--radius-image);
  background: var(--white);
  color: var(--text);
  font-family: var(--font-inter);
  font-size: var(--font-size-caption);
  resize: vertical;
  min-height: 70px;
}
.chat-answer-box textarea:focus { outline: 2px solid var(--primary-light); }

.chat-footer { background: var(--bg); }

.chat-input-row {
  display: flex;
  gap: var(--spacing-8);
}
.chat-input-row input {
  flex: 1;
  padding: 0 var(--spacing-16);
  height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-input);
  background: var(--white);
  color: var(--text);
  font-family: var(--font-inter);
  font-size: var(--font-size-caption);
}
.chat-input-row input:focus { outline: 2px solid var(--primary-light); }
.chat-send-btn {
  width: auto;
  height: 44px;
  padding: 0 var(--spacing-20);
}

/* ---------------------------------------------------------------------
   Exams tab - Study Guide / Mock Exam toggle
   --------------------------------------------------------------------- */

.exams-toggle {
  display: flex;
  background: var(--white);
  border-radius: var(--radius-button);
  padding: 4px;
  margin-bottom: var(--spacing-16);
  box-shadow: var(--shadow-soft);
}

.exams-toggle-btn {
  flex: 1;
  border: none;
  background: transparent;
  padding: 10px 6px;
  border-radius: var(--radius-button);
  font-family: var(--font-inter);
  font-weight: 700;
  font-size: 12px;
  color: var(--text-muted);
  cursor: pointer;
}

.exams-toggle-btn.active {
  background: var(--primary);
  color: var(--white);
}

.study-guide-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-4);
}
.study-guide-card-header h3 { margin: 0; flex: 1; }
.study-guide-download-btn {
  flex-shrink: 0;
  font-family: 'Poppins', sans-serif;
  font-size: 0.75rem;
  padding: 6px 12px;
  white-space: nowrap;
}
.study-guide-list {
  margin: 0 0 var(--spacing-12);
  padding-left: var(--spacing-20);
  font-size: var(--font-size-caption);
  line-height: 1.8;
}

/* ---------------------------------------------------------------------
   Flashcard Game
   --------------------------------------------------------------------- */

.flashcard-count-group {
  display: flex;
  gap: var(--spacing-8);
}
.flashcard-count-btn {
  flex: 1;
  padding: 10px;
  border: 1.5px solid var(--primary-light);
  border-radius: var(--radius-button);
  background: transparent;
  font-family: var(--font-inter);
  font-weight: 700;
  font-size: var(--font-size-body);
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.flashcard-count-btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.flashcard-game-card { user-select: none; }

.flashcard-progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-16);
  font-size: var(--font-size-caption);
  font-weight: 600;
  color: var(--text-muted);
}
.flashcard-timer {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary);
  font-family: 'Poppins', sans-serif;
  min-width: 2.5em;
  text-align: right;
}
.flashcard-timer.timer-danger { color: var(--danger); }

.flashcard-flip-container {
  perspective: 900px;
  height: 160px;
  margin-bottom: var(--spacing-16);
}
.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.42s ease;
  transform-style: preserve-3d;
}
.flashcard-flip-container.flipped .flashcard-inner {
  transform: rotateY(180deg);
}
.flashcard-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-16);
  text-align: center;
}
.flashcard-front {
  background: rgba(90, 62, 118, 0.07);
  border: 1.5px solid var(--primary-light);
}
.flashcard-back {
  background: var(--white);
  border: 1.5px solid var(--border);
  transform: rotateY(180deg);
}
.flashcard-label {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--spacing-4);
}
.flashcard-text {
  font-size: var(--font-size-body);
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
}
.flashcard-result-label {
  font-size: 1rem;
  font-weight: 800;
  font-family: 'Poppins', sans-serif;
  margin-bottom: var(--spacing-4);
}
.flashcard-result-label.result-correct { color: #12805c; }
.flashcard-result-label.result-wrong { color: var(--danger); }
.flashcard-explanation {
  font-size: var(--font-size-caption);
  line-height: 1.5;
  color: var(--text-primary);
}

/* MCQ option buttons */
.flashcard-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-4);
}
.flashcard-option-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-button);
  background: var(--white);
  font-family: var(--font-inter);
  font-size: var(--font-size-caption);
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.flashcard-option-btn:not([disabled]):hover {
  border-color: var(--primary-light);
  background: rgba(90, 62, 118, 0.04);
}
.flashcard-option-btn[disabled] { cursor: default; }
.flashcard-option-btn.option-correct {
  border-color: #12805c;
  background: rgba(18, 128, 92, 0.08);
  font-weight: 600;
}
.flashcard-option-btn.option-wrong {
  border-color: var(--danger);
  background: rgba(217, 83, 79, 0.08);
  font-weight: 600;
}
.flashcard-option-btn.option-dim { opacity: 0.45; }
.flashcard-option-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  min-width: 24px;
  border-radius: 50%;
  background: rgba(90, 62, 118, 0.1);
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--primary);
}
.flashcard-option-btn.option-correct .flashcard-option-key { background: #12805c; color: var(--white); }
.flashcard-option-btn.option-wrong .flashcard-option-key { background: var(--danger); color: var(--white); }
.flashcard-option-text { flex: 1; line-height: 1.4; }

.flashcard-score {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-12);
  margin: var(--spacing-16) 0;
}
.flashcard-score-big {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary);
  font-family: 'Poppins', sans-serif;
}
.flashcard-score-pct {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-muted);
}
.flashcard-missed-list { margin-bottom: var(--spacing-16); }
.flashcard-missed-item {
  padding: var(--spacing-8) 0;
  border-bottom: 1px solid var(--border);
}
.flashcard-missed-item:last-child { border-bottom: none; }
.flashcard-missed-item strong {
  display: block;
  font-size: var(--font-size-caption);
  color: var(--primary);
}
.flashcard-missed-item p {
  margin: 2px 0 0;
  font-size: var(--font-size-caption);
  color: var(--text-muted);
}
.flashcard-result-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
  margin-top: var(--spacing-16);
}

/* ---------------------------------------------------------------------
   Exam Refresher
   --------------------------------------------------------------------- */

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-8);
}

.topic-chip {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-tag);
  background: var(--white);
  padding: 8px 16px;
  font-family: var(--font-inter);
  font-size: var(--font-size-caption);
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
}

.topic-chip.selected {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--white);
}

.pill-row {
  display: flex;
  gap: var(--spacing-8);
}

.pill-btn {
  flex: 1;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-button);
  background: var(--white);
  padding: 10px;
  font-family: var(--font-inter);
  font-size: var(--font-size-caption);
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
}

.pill-btn.selected {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--white);
}

.level-card-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
}

.level-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--spacing-12) var(--spacing-16);
  cursor: pointer;
}

.level-card.selected {
  border-color: var(--primary);
  background: rgba(90,62,118,0.08);
}

.level-card-emoji {
  font-size: 28px;
  line-height: 1;
  flex-shrink: 0;
}

.level-card-label {
  font-weight: 700;
  margin-bottom: 2px;
}

.level-card-desc {
  font-size: var(--font-size-caption);
  color: var(--text-muted);
}

.refresher-timer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-12);
}

.refresher-timer {
  font-family: var(--font-inter);
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
}

.refresher-timer.timer-danger {
  color: var(--danger);
}

.refresher-section-card {
  padding: var(--spacing-16) var(--spacing-20);
}

.refresher-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  border: none;
  background: transparent;
  padding: 0;
  font-family: var(--font-inter);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}

.refresher-section-chevron {
  color: var(--primary);
  font-size: 18px;
}

.refresher-section-body {
  margin-top: var(--spacing-16);
}

.refresher-question {
  margin-bottom: var(--spacing-16);
}

.refresher-question .ai-bubble {
  margin-bottom: var(--spacing-8);
}

.refresher-feedback {
  margin-top: var(--spacing-8);
  border-radius: var(--radius-image);
  padding: var(--spacing-12) var(--spacing-16);
  font-size: var(--font-size-caption);
}
.refresher-feedback p { margin: 4px 0 0; color: inherit; }

.feedback-correct {
  background: rgba(76,175,80,0.12);
  border: 1.5px solid var(--success);
  color: #2e6b30;
}

.feedback-incorrect {
  background: rgba(217,83,79,0.1);
  border: 1.5px solid var(--danger);
  color: #8a3936;
}

.refresher-stat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-8) 0;
  border-bottom: 1px solid var(--border);
}
.refresher-stat-row:last-of-type {
  border-bottom: none;
}

/* ---------------------------------------------------------------------
   Loading / spinner
   --------------------------------------------------------------------- */

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.spinner-purple {
  border: 2px solid rgba(90,62,118,0.2);
  border-top-color: var(--primary);
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  padding: var(--spacing-20);
  justify-content: center;
  color: var(--text-muted);
  font-size: var(--font-size-caption);
}

/* ---------------------------------------------------------------------
   Toast
   --------------------------------------------------------------------- */

.toast {
  position: fixed;
  bottom: calc(var(--nav-height) + var(--spacing-16));
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--white);
  padding: 12px 20px;
  border-radius: var(--radius-button);
  font-size: var(--font-size-caption);
  font-weight: 600;
  z-index: 400;
  box-shadow: var(--shadow-large);
  max-width: 90%;
  text-align: center;
}

.toast.toast-error { background: var(--danger); }
.toast.toast-success { background: #2e7d32; }

/* ---------------------------------------------------------------------
   Diagnostic
   --------------------------------------------------------------------- */

.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: var(--radius-tag);
  overflow: hidden;
  margin-bottom: var(--spacing-20);
}
.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.25s ease;
}

.option-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 14px 20px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-button);
  background: var(--white);
  margin-bottom: var(--spacing-12);
  cursor: pointer;
  font-weight: 500;
}
.option-btn.selected {
  border-color: var(--primary);
  background: rgba(90,62,118,0.08);
  color: var(--primary);
  font-weight: 600;
}

/* ---------------------------------------------------------------------
   Diagnostic overlay (non-dismissable full-screen gate)
   --------------------------------------------------------------------- */

.diagnostic-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(42, 28, 58, 0.55);
  display: flex;
  align-items: stretch;
  justify-content: center;
}

.diagnostic-modal {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 520px;
  background: var(--bg);
  overflow-y: auto;
  box-shadow: var(--shadow-large);
}

.diagnostic-header {
  background: var(--primary);
  color: var(--white);
  padding: var(--spacing-20) var(--spacing-24);
  text-align: center;
}

.diagnostic-header-tall {
  padding: var(--spacing-32) var(--spacing-24) var(--spacing-32);
}

.diagnostic-logo {
  font-family: var(--font-inter);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: var(--letter-spacing-tight);
  color: var(--white);
}
.diagnostic-logo .tm { font-size: 11px; vertical-align: super; font-style: normal; }

.diagnostic-welcome {
  margin: var(--spacing-20) 0 var(--spacing-8);
  font-size: 28px;
  font-weight: 800;
  color: var(--white);
}

.diagnostic-welcome-sub {
  margin: 0;
  font-size: var(--font-size-body);
  color: rgba(255, 255, 255, 0.85);
}

.diagnostic-body {
  flex: 1;
  padding: var(--spacing-24);
  display: flex;
  flex-direction: column;
}

.diagnostic-center {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--spacing-12);
}

.diagnostic-lead {
  font-size: var(--font-size-body);
  color: var(--text-muted);
  margin: var(--spacing-8) 0 var(--spacing-20);
}

.diagnostic-lang-pills {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
  margin-top: var(--spacing-12);
}

.diagnostic-lang-pill {
  width: 100%;
  padding: 18px;
  border: 2px solid var(--border);
  border-radius: var(--radius-button);
  background: var(--white);
  font-family: var(--font-inter);
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.diagnostic-lang-pill:hover,
.diagnostic-lang-pill:active {
  border-color: var(--primary);
  background: rgba(90, 62, 118, 0.06);
}

.diagnostic-qcount {
  font-size: var(--font-size-caption);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-12);
}

.diagnostic-question {
  margin: 0 0 var(--spacing-20);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

.diagnostic-options { margin-bottom: var(--spacing-12); }

.diagnostic-option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin-right: var(--spacing-8);
  border-radius: var(--radius-tag);
  background: var(--primary);
  color: var(--white);
  font-weight: 700;
  font-size: 13px;
  vertical-align: middle;
}
.option-btn.selected .diagnostic-option-letter { background: var(--primary-dark); }

.diagnostic-title {
  margin: 0 0 var(--spacing-16);
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
}

.diagnostic-level-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary-dark);
  font-size: 44px;
  font-weight: 900;
  margin: var(--spacing-8) 0;
}

.diagnostic-level-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 var(--spacing-8);
}

.diagnostic-score {
  font-size: var(--font-size-body);
  color: var(--text-muted);
  margin: 0 0 var(--spacing-16);
}

/* ---------------------------------------------------------------------
   FET Subject Selection overlay
   --------------------------------------------------------------------- */

.subject-section {
  margin-bottom: var(--spacing-20);
}

.subject-section-label {
  font-size: var(--font-size-caption);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary);
  margin-bottom: var(--spacing-8);
}

.subject-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-button);
  background: var(--white);
  margin-bottom: var(--spacing-8);
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.subject-row:has(input:checked):not(.subject-row-locked) {
  border-color: var(--primary);
  background: rgba(90, 62, 118, 0.07);
}
.subject-row-locked {
  background: rgba(90, 62, 118, 0.04);
  cursor: default;
  opacity: 0.8;
}

.subject-checkbox,
.subject-radio {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  flex-shrink: 0;
  cursor: pointer;
}
.subject-row-locked .subject-checkbox { cursor: default; }

.subject-name {
  flex: 1;
  font-size: var(--font-size-body);
  font-weight: 500;
  color: var(--text);
}

.subject-required-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  background: rgba(90, 62, 118, 0.12);
  padding: 2px 8px;
  border-radius: var(--radius-tag);
  white-space: nowrap;
}

.subject-elective-counter {
  font-size: var(--font-size-caption);
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: var(--spacing-8);
}
.subject-elective-counter.counter-met {
  color: var(--success);
}

.form-error {
  color: var(--danger);
  font-size: var(--font-size-caption);
  font-weight: 600;
  margin: var(--spacing-4) 0 var(--spacing-12);
}

/* ---------------------------------------------------------------------
   Account screen
   --------------------------------------------------------------------- */

.account-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-12) 0;
  border-bottom: 1px solid var(--border);
}
.account-row:last-child { border-bottom: none; }
.account-row .label { font-size: var(--font-size-caption); color: var(--text-muted); }
.account-row .value { font-weight: 600; font-size: var(--font-size-body); text-align: right; }

/* Profile card */
.account-profile-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-16);
}
.avatar-lg {
  width: 64px;
  height: 64px;
  font-size: 24px;
  flex-shrink: 0;
}
.account-profile-info { min-width: 0; }
.account-profile-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
}
.account-profile-email {
  font-size: var(--font-size-caption);
  color: var(--text-muted);
  margin-top: 2px;
  word-break: break-word;
}
.account-profile-grade {
  font-size: var(--font-size-caption);
  font-weight: 700;
  color: var(--primary);
  margin-top: 6px;
}

/* Section label + subscription tier badge */
.account-section-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.account-section-label {
  font-size: var(--font-size-body);
  font-weight: 700;
  color: var(--text);
}
.tier-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-tag);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.tier-badge-free { background: var(--border); color: var(--text-muted); }
.tier-badge-basic { background: var(--primary); color: var(--white); }
.tier-badge-premium { background: var(--accent); color: var(--primary-dark); }

/* Stats row: gold numbers, purple labels */
.account-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-16);
}
.account-stat {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--spacing-16) var(--spacing-8);
  text-align: center;
  box-shadow: var(--shadow);
}
.account-stat .num {
  font-size: 26px;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}
.account-stat .lbl {
  font-size: 11px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-top: 6px;
}

.referral-code-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg);
  border: 1.5px dashed var(--accent);
  border-radius: var(--radius-md);
  padding: var(--spacing-12) var(--spacing-16);
  margin: var(--spacing-12) 0;
}
.referral-code-box .code {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--primary);
}

.referral-progress {
  display: flex;
  gap: var(--spacing-8);
  margin-top: var(--spacing-12);
}
.referral-dot {
  flex: 1;
  height: 8px;
  border-radius: var(--radius-tag);
  background: var(--border);
}
.referral-dot.filled { background: var(--accent); }

.tier-card {
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--spacing-20);
  margin-bottom: var(--spacing-12);
}
.tier-card.current { border-color: var(--primary); }
.tier-card.recommended { border-color: var(--accent); position: relative; }
.tier-name { font-weight: 800; font-size: var(--font-size-body); }
.tier-price { font-size: 22px; font-weight: 800; color: var(--primary); margin: var(--spacing-8) 0; }
.tier-price span { font-size: var(--font-size-caption); font-weight: 500; color: var(--text-muted); }
.tier-features { margin: var(--spacing-12) 0; padding: 0; list-style: none; font-size: var(--font-size-caption); color: var(--text-muted); }
.tier-features li { padding: 3px 0; }
.tier-features li::before { content: "\2713  "; color: var(--success); font-weight: 700; }

/* ---------------------------------------------------------------------
   Parent dashboard
   --------------------------------------------------------------------- */

.learner-card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: var(--spacing-24);
  margin-bottom: var(--spacing-16);
  box-shadow: var(--shadow-medium);
}

.learner-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-12);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-12);
  margin: var(--spacing-12) 0;
}
.stat-box {
  background: var(--bg);
  border-radius: var(--radius-md);
  padding: var(--spacing-12);
  text-align: center;
}
.stat-box .num { font-size: 20px; font-weight: 800; color: var(--primary); }
.stat-box .lbl { font-size: 11px; color: var(--text-muted); text-transform: uppercase; }

.alert-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-12);
  padding: var(--spacing-12);
  border-radius: var(--radius-md);
  background: var(--bg);
  margin-bottom: var(--spacing-8);
  font-size: var(--font-size-caption);
}
.alert-item.unread { border-left: 3px solid var(--accent); background: #fff8ea; }
.alert-item .alert-icon { font-size: 18px; }
.alert-item .alert-meta { font-size: 11px; color: var(--text-muted); margin-top: var(--spacing-4); }

.activity-item {
  padding: var(--spacing-12) 0;
  border-bottom: 1px solid var(--border);
  font-size: var(--font-size-caption);
}
.activity-item:last-child { border-bottom: none; }
.activity-item .activity-time { font-size: 11px; color: var(--text-muted); }

/* Parent dashboard: Activity tab session history */
.session-date-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  border: none;
  background: transparent;
  padding: 0;
  font-family: var(--font-inter);
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: var(--spacing-16) 0 var(--spacing-8);
  cursor: pointer;
  text-align: left;
}
.session-date-chevron {
  font-size: 12px;
  color: var(--primary);
}
.session-history-card { padding: var(--spacing-16) var(--spacing-20); }
.session-history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-8);
}
.session-phase-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  background: var(--accent);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 800;
}
.session-history-time { font-size: 12px; }
.session-history-preview {
  margin: 0 0 var(--spacing-8);
  font-size: var(--font-size-caption);
  color: var(--text);
}
.session-history-detail { margin-top: var(--spacing-12); }
.session-history-block { margin-bottom: var(--spacing-12); }
.session-history-block:last-child { margin-bottom: 0; }
.session-history-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-4);
}
.session-history-text { font-size: 13px; }
.session-history-ai { border: 1.5px solid var(--border); }

/* Parent dashboard: child selector (only shown with 2+ linked children) */
.child-selector {
  flex-wrap: wrap;
  margin-bottom: var(--spacing-16);
}
.child-selector .pill-btn { flex: 0 1 auto; }

/* Parent dashboard: home tab alert banners */
.alert-banner {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  padding: var(--spacing-16) var(--spacing-20);
  border-radius: var(--radius-card);
  font-weight: 700;
  font-size: var(--font-size-caption);
  margin-bottom: var(--spacing-16);
}
.alert-banner-icon { font-size: 20px; }
.alert-banner-danger { background: rgba(217, 83, 79, 0.12); color: var(--danger); }
.alert-banner-ok { background: rgba(76, 175, 80, 0.12); color: #2e7d32; }

/* Parent dashboard: activity tab mock-exam score colors */
.exam-score { font-weight: 800; font-size: 18px; }
.score-good { color: #2e7d32; }
.score-mid { color: var(--warning); }
.score-low { color: var(--danger); }

/* Parent dashboard: account tab linked children + notification toggles */
.linked-child-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: var(--spacing-12) var(--spacing-16);
  margin-bottom: var(--spacing-8);
  box-shadow: var(--shadow-soft);
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-8) 0;
}
.toggle-row + .toggle-row { border-top: 1px solid var(--border); }

.toggle-switch {
  position: relative;
  width: 44px;
  height: 26px;
  border-radius: 99px;
  border: none;
  background: var(--border);
  cursor: pointer;
  flex-shrink: 0;
  display: inline-block;
}
.toggle-switch::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--white);
  transition: left 0.15s ease;
}
.toggle-switch.on { background: var(--primary); }
.toggle-switch.on::after { left: 21px; }
.toggle-switch.locked { cursor: default; opacity: 0.6; }

/* ---------------------------------------------------------------------
   Exam
   --------------------------------------------------------------------- */

.exam-question {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: var(--spacing-20);
  margin-bottom: var(--spacing-12);
  box-shadow: var(--shadow-soft);
}
.exam-question .q-head {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 700;
  font-family: var(--font-inter);
  color: var(--primary);
  margin-bottom: var(--spacing-8);
  text-transform: uppercase;
}
.exam-question .q-text { margin-bottom: var(--spacing-12); font-size: var(--font-size-caption); }

.result-bar {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: var(--spacing-24);
  text-align: center;
  margin-bottom: var(--spacing-16);
  box-shadow: var(--shadow-medium);
}
.result-score {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
}
.result-pct {
  font-size: 20px;
  font-weight: 800;
  margin-top: 2px;
}
.result-pct-good { color: #2e7d32; }
.result-pct-mid { color: var(--warning); }
.result-pct-bad { color: var(--danger); }

/* Mock-exam question/marks breakdown under the difficulty selector */
.mock-exam-stat { margin: var(--spacing-8) 0 0; }

/* Per-question answer lines on the mock-exam results screen */
.exam-answer-line {
  font-size: var(--font-size-caption);
  margin-bottom: var(--spacing-8);
}
.q-correct { color: #2e7d32; font-weight: 600; }
.q-wrong { color: var(--danger); font-weight: 600; }

/* ---------------------------------------------------------------------
   Misc
   --------------------------------------------------------------------- */

.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.muted { color: var(--text-muted); font-size: var(--font-size-caption); }
.small { font-size: 12px; }
.divider { height: 1px; background: var(--border); margin: var(--spacing-16) 0; }
.link-btn {
  background: none;
  border: none;
  color: var(--primary);
  font-family: var(--font-inter);
  font-weight: 600;
  cursor: pointer;
  padding: 0;
  font-size: var(--font-size-caption);
  text-decoration: underline;
}

/* ---------------------------------------------------------------------
   Admin dashboard
   --------------------------------------------------------------------- */

.admin-email {
  font-size: var(--font-size-caption);
  color: rgba(255, 255, 255, 0.85);
  word-break: break-all;
}

.admin-tabs {
  display: flex;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
}

.admin-tab-btn {
  flex: 1;
  border: none;
  background: transparent;
  padding: var(--spacing-16) var(--spacing-8);
  font-family: var(--font-inter);
  font-size: var(--font-size-caption);
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 3px solid transparent;
}

.admin-tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--accent);
}

.admin-container { padding-bottom: var(--spacing-32); }

.admin-user-card,
.admin-flag-card {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
}

.admin-user-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-12);
}

.admin-user-email {
  font-weight: 700;
  word-break: break-word;
}

.admin-badges {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--spacing-4);
  flex-shrink: 0;
}

.admin-user-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-8);
}

.admin-user-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
  flex-wrap: wrap;
  margin-top: var(--spacing-4);
}

.admin-tier-select {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-button);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-inter);
  font-size: var(--font-size-caption);
  font-weight: 600;
}
.admin-tier-select:focus {
  outline: 2px solid var(--primary-light);
  outline-offset: 1px;
}

.role-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-tag);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--white);
}
.role-badge-admin { background: var(--primary-dark); }
.role-badge-parent { background: var(--primary); }
.role-badge-learner { background: var(--primary-light); }

.status-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}
.status-active { background: rgba(76,175,80,0.12); color: #2e6b30; }
.status-frozen { background: rgba(217,83,79,0.12); color: #8a3936; }
.status-pending { background: var(--border); color: var(--text-muted); }
.status-warning { background: rgba(230,179,71,0.2); color: var(--primary-dark); }

.admin-flag-text {
  margin: 0;
  font-size: var(--font-size-caption);
  color: var(--text);
  white-space: pre-wrap;
}

.admin-flag-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
  flex-wrap: wrap;
}

.admin-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-16);
}

.admin-stat-card {
  text-align: center;
  padding: var(--spacing-20) var(--spacing-8);
}

.admin-stat-num {
  font-size: 30px;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}

.admin-stat-lbl {
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-top: var(--spacing-8);
}

/* ---- Admin Referral Codes Tab ---- */
.admin-referral-create-card {
  margin-bottom: var(--spacing-16);
}

.admin-referral-form .field-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin: var(--spacing-4) 0 0;
}

.admin-referral-input-row {
  display: flex;
  gap: var(--spacing-8);
  align-items: center;
}

.admin-referral-input-row input {
  flex: 1;
  min-width: 0;
}

.admin-referral-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.admin-referral-table th,
.admin-referral-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.admin-referral-table th {
  font-weight: 700;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--primary);
  background: rgba(90, 62, 118, 0.04);
}

.admin-referral-table tbody tr:last-child td {
  border-bottom: none;
}

.referral-code-cell {
  font-family: monospace;
  font-weight: 700;
  color: var(--primary);
}

.admin-referral-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(230, 179, 71, 0.18);
  color: var(--accent-dark);
  border: 1px solid var(--accent);
  margin-left: var(--spacing-8);
}

/* ---- Password visibility toggle ---- */
.pw-field-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.pw-field-wrap input {
  width: 100%;
  padding-right: 44px;
}

.pw-visibility-btn {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px 6px;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1;
  border-radius: var(--radius);
}

.pw-visibility-btn:hover {
  color: var(--text);
  background: rgba(90, 62, 118, 0.06);
}

/* ---- Keep me signed in ---- */
.keep-signed-in-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: var(--spacing-12);
}

/* ---- Topbar logout button ---- */
.topbar-logout-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 18px;
  color: var(--text-muted);
  padding: 4px 6px;
  border-radius: var(--radius);
  line-height: 1;
}

.topbar-logout-btn:hover {
  color: var(--danger);
  background: rgba(217, 83, 79, 0.08);
}

/* ---- Referral discount price block ---- */
.tier-price-block {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-bottom: var(--spacing-8);
}

.tier-price-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}

.tier-price-original {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: line-through;
  text-decoration-color: var(--danger);
}

.tier-discount-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
}

.tier-price-discounted {
  color: var(--accent-dark) !important;
  margin-bottom: 0 !important;
}

.tier-discount-expiry {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ---- Child selector row with Add Child button ---- */
.child-selector-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-8);
}

.child-selector-row .child-selector {
  flex: 1;
  margin-bottom: 0;
}

/* ---- Add Child modal mode cards ---- */
.add-child-mode-cards {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-12);
  margin-top: var(--spacing-8);
}

.add-child-mode-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  width: 100%;
  padding: var(--spacing-16);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--white);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
}

.add-child-mode-card:hover {
  border-color: var(--primary);
  background: var(--bg);
}

.add-child-mode-icon {
  font-size: 28px;
  margin-bottom: 4px;
}

.add-child-mode-label {
  font-weight: 700;
  font-size: 15px;
}

.add-child-mode-desc {
  font-size: 13px;
  line-height: 1.4;
}


@media (min-width: 600px) {
  body { font-size: var(--font-size-body); }
  .container { padding: var(--spacing-24); }
  .auth-card { padding: var(--spacing-32); }
  .auth-logo { font-size: 56px; }
  .auth-card h3 { font-size: 30px; }
  .screen-title { font-size: 36px; }
  .section-title { font-size: var(--font-size-subheading); }
  .result-score { font-size: 40px; }
  .admin-stats-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
  .screen { max-width: 1100px; }
  .bottom-nav { max-width: 1100px; }
  /* Spread the child pill row into the wider space instead of leaving a right-side gap */
  .child-selector { justify-content: flex-start; }
}