/* ── RESET AND BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --surface2: #f0f2f7;
  --border: #dde1eb;
  --text: #1a1d27;
  --text-muted: #5a6070;
  --text-dim: #8890a8;
  --accent: #2d5fd4;
  --success: #27ae60;
  --warning: #f39c12;
  --danger: #e74c3c;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 2px 12px rgba(0,0,0,0.10);
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #242736;
  --border: #2e3248;
  --text: #e8eaf0;
  --text-muted: #8890a8;
  --text-dim: #5a6070;
  --accent: #4f7ef8;
  --shadow: 0 2px 12px rgba(0,0,0,0.35);
}

html { font-size: 15px; box-sizing: border-box; overflow-x: hidden; }
*, *::before, *::after { box-sizing: inherit; }
body { font-family: var(--font); background: var(--bg); color: var(--text);
       min-height: 100vh; line-height: 1.55; overflow-x: hidden; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── NAVBAR ── */
.navbar {
  display: flex; align-items: center; gap: 20px;
  padding: 0 20px; height: 56px;
  background: var(--surface); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.nav-brand { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.nav-logo { font-size: 1.3rem; }
.nav-name { font-weight: 700; font-size: 1rem; color: var(--text); white-space: nowrap; }
.nav-links { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.nav-link {
  color: var(--text-muted); padding: 6px 12px; border-radius: var(--radius-sm);
  font-size: 0.9rem; transition: background 0.15s, color 0.15s;
}
.nav-link:hover, .nav-link.active {
  background: var(--surface2); color: var(--text); text-decoration: none;
}
.nav-subjects { display: flex; gap: 5px; flex-wrap: wrap; }
.nav-subject-pill {
  font-size: 0.78rem; padding: 4px 10px;
  border-radius: 20px; border: 1px solid var(--subject-colour, #666);
  color: var(--subject-colour, #ccc); transition: background 0.15s;
}
.nav-subject-pill:hover, .nav-subject-pill.active {
  background: var(--subject-colour, #444); color: #fff; text-decoration: none;
}
.nav-spacer { flex: 1; }
.theme-toggle {
  background: transparent; border: none; color: var(--text-muted);
  font-size: 1.2rem; cursor: pointer; padding: 6px 10px;
  transition: color 0.15s; flex-shrink: 0;
}
.theme-toggle:hover { color: var(--text); }

/* ── ACCOUNT MENU ── */
.account-menu { position: relative; flex-shrink: 0; }

.account-btn {
  display: flex; align-items: center; gap: 6px;
  background: transparent; border: 1px solid var(--border);
  border-radius: 20px; padding: 5px 10px 5px 6px;
  cursor: pointer; transition: background 0.15s;
}
.account-btn:hover { background: var(--surface2); }

.account-avatar {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); color: #fff;
  font-size: 0.75rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.account-chevron { font-size: 0.7rem; color: var(--text-muted); }

.account-dropdown {
  display: none; position: absolute; top: calc(100% + 6px); right: 0;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  z-index: 200; min-width: 240px; padding: 6px 0;
}
.account-dropdown.open { display: block; }

.acct-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 14px; font-size: 0.875rem;
  color: var(--text); background: none; border: none;
  width: 100%; text-align: left; cursor: pointer;
  font-family: var(--font); transition: background 0.1s;
  text-decoration: none;
}
.acct-item:hover { background: var(--surface2); }
.acct-item-icon { font-size: 1rem; width: 20px; text-align: center; flex-shrink: 0; }
.acct-item-label { flex: 1; }
.acct-item-badge {
  font-size: 0.75rem; color: var(--text-muted);
  background: var(--surface2); padding: 2px 7px; border-radius: 10px;
}
.acct-toggle { justify-content: space-between; }
.acct-logout { color: var(--text-muted); }
.acct-logout:hover { color: var(--text); }

.acct-divider { height: 1px; background: var(--border); margin: 4px 0; }

.acct-section-label {
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--text-muted);
  padding: 6px 14px 4px;
}

.acct-mode-option {
  display: flex; align-items: flex-start; gap: 8px;
  padding: 8px 14px; background: none; border: none;
  width: 100%; text-align: left; cursor: pointer;
  font-family: var(--font); transition: background 0.1s;
}
.acct-mode-option:hover { background: var(--surface2); }
.acct-mode-option.active { background: rgba(52,152,219,0.08); }

.acct-mode-check {
  width: 16px; flex-shrink: 0; font-size: 0.8rem;
  color: var(--accent); margin-top: 2px;
}
.acct-mode-body { display: flex; flex-direction: column; gap: 2px; }
.acct-mode-name { font-size: 0.875rem; color: var(--text); font-weight: 500; }
.acct-mode-desc { font-size: 0.75rem; color: var(--text-muted); line-height: 1.3; }

/* ── MAIN CONTENT ── */
.main-content { padding: 24px 20px; }

/* ── BUTTONS ── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius-sm);
  border: none; cursor: pointer; font-size: 0.88rem; font-family: var(--font);
  font-weight: 500; transition: opacity 0.15s, transform 0.1s; text-decoration: none;
}
.btn:hover { opacity: 0.85; text-decoration: none; }
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-secondary { background: var(--surface2); color: var(--text); border: 1px solid var(--border); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-full { width: 100%; justify-content: center; margin-bottom: 8px; }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }

/* ── PROGRESS BAR ── */
.progress-bar {
  height: 6px; background: var(--surface2); border-radius: 3px; overflow: hidden;
}
.progress-bar.large { height: 10px; }
.progress-fill { height: 100%; border-radius: 3px; transition: width 0.3s ease; }

/* ── STATUS BADGES ── */
.status-badge {
  font-size: 0.78rem; padding: 3px 8px; border-radius: 20px; font-weight: 600;
}
.status-badge.completed { background: rgba(39,174,96,0.2); color: var(--success); }
.status-badge.skipped { background: rgba(243,156,18,0.2); color: var(--warning); }
.status-badge.unscheduled { background: var(--surface2); color: var(--text-dim); }

/* ── HOME ── */
.home-layout { display: flex; flex-direction: column; gap: 32px; min-height: calc(100vh - 56px); padding-bottom: 40px; }
.today-header {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 20px; background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border);
}
.today-date { flex: 0 0 auto; }
.date-label { display: block; font-size: 0.78rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.08em; }
.date-value { font-size: 1.3rem; font-weight: 700; }
.next-exam-banner {
  flex: 1; display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 12px 16px; background: var(--surface2); border-radius: var(--radius-sm);
  border-left: 4px solid var(--exam-colour, #666);
}
.exam-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; }
.exam-name { font-weight: 700; color: var(--exam-colour, #fff); }
.exam-countdown { font-size: 1.5rem; font-weight: 800; color: var(--exam-colour, #fff); }
.exam-detail { font-size: 0.82rem; color: var(--text-muted); }
.streak-badge {
  padding: 8px 14px; border-radius: 20px;
  background: var(--surface2); border: 1px solid var(--border);
  font-size: 0.88rem; color: var(--text-muted);
}
.streak-badge.active { border-color: var(--warning); color: var(--warning); }

.section-heading { font-size: 1.1rem; font-weight: 700; margin-bottom: 14px; color: var(--text); }
.today-sessions { display: flex; flex-direction: column; gap: 14px; }

/* Session card */
.session-card {
  background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border); border-left: 4px solid var(--subject-colour, #666);
  overflow: hidden; transition: border-color 0.2s;
}
.session-card.completed { opacity: 0.6; }
.session-card.deferred { border-left-color: var(--warning); opacity: 0.8; }
.session-card.spaced-review { border-left-color: var(--accent); }
.session-type-badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 0.75rem; font-weight: 700; padding: 3px 10px; border-radius: 20px;
}
.session-type-badge.review { background: rgba(52,152,219,0.15); color: var(--accent); }
.session-type-badge.deferred { background: rgba(243,156,18,0.15); color: var(--warning); }
.session-card-header {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px; background: var(--surface2);
  border-bottom: 1px solid var(--border);
}
.session-subject-tag {
  font-size: 0.75rem; font-weight: 700; padding: 3px 10px; border-radius: 20px; color: #fff;
}
.session-number { font-size: 0.8rem; color: var(--text-muted); }
.session-card-body { padding: 14px 16px; overflow: visible; }
.session-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; }
.session-meta { display: flex; gap: 12px; margin-bottom: 10px; }
.session-activity, .session-time { font-size: 0.8rem; color: var(--text-muted);
  padding: 2px 8px; background: var(--surface2); border-radius: var(--radius-sm); }
.session-instructions { font-size: 0.9rem; color: var(--text); line-height: 1.6; margin-bottom: 12px; word-wrap: break-word; overflow-wrap: break-word; }
.session-card-actions {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 12px 16px; border-top: 1px solid var(--border);
  background: var(--surface2);
}
.after-notes {
  padding: 10px 16px; font-size: 0.85rem; color: var(--text-muted);
  border-top: 1px solid var(--border);
  background: rgba(255,255,255,0.02);
}
.after-notes-label { font-weight: 600; margin-right: 6px; color: var(--success); }

/* Upcoming */
.upcoming-list { display: flex; flex-direction: column; gap: 0; }
.upcoming-day { margin-bottom: 12px; }
.upcoming-date-header {
  font-size: 0.8rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.06em;
  padding: 6px 0; margin-bottom: 4px;
  border-bottom: 1px solid var(--border);
}
.upcoming-item {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 12px; margin-bottom: 3px;
  background: var(--surface); border-radius: var(--radius-sm);
}
.upcoming-subject { font-size: 0.78rem; font-weight: 700; color: var(--text-muted); min-width: 80px; }
.upcoming-title { font-size: 0.88rem; flex: 1; }
.upcoming-activity { font-size: 0.78rem; color: var(--text-muted); }
.upcoming-mins { font-size: 0.78rem; color: var(--text-muted); white-space: nowrap; margin-left: auto; }

/* Exam grid */
.exam-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.exam-tile {
  background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border); overflow: hidden;
  text-decoration: none; display: block; transition: border-color 0.2s, transform 0.15s;
}
.exam-tile:hover { border-color: var(--subject-colour); transform: translateY(-2px); text-decoration: none; }
.exam-tile-header {
  padding: 8px 12px; display: flex; justify-content: space-between; align-items: center;
}
.exam-tile-board { font-size: 0.72rem; font-weight: 700; color: rgba(255,255,255,0.85); }
.exam-tile-body { padding: 12px; }
.exam-tile-name { font-weight: 700; font-size: 0.88rem; margin-bottom: 4px; color: var(--text); }
.exam-tile-date { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 4px; }
.exam-tile-countdown { font-size: 1.1rem; font-weight: 800; color: var(--subject-colour); margin-bottom: 8px; }
.exam-tile-progress { display: flex; flex-direction: column; gap: 4px; }
.progress-text { font-size: 0.75rem; color: var(--text-muted); }

/* Empty state */
.empty-state { text-align: center; padding: 48px 20px; color: var(--text-muted); }
.empty-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state h3 { font-size: 1.1rem; color: var(--text); margin-bottom: 8px; }
.empty-state p { margin-bottom: 16px; }

/* ── SESSION DETAIL ── */
.session-detail-layout { display: flex; flex-direction: column; min-height: auto; flex: 1; }
.breadcrumb { display: flex; gap: 8px; align-items: center; font-size: 0.85rem;
  color: var(--text-muted); margin-bottom: 12px; }
.session-detail-header {
  padding: 12px 20px; background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border); margin-bottom: 16px; flex-shrink: 0;
}
.session-detail-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
.subject-badge { font-size: 0.8rem; font-weight: 700; padding: 4px 12px; border-radius: 20px; color: #fff; }
.session-num-badge, .activity-badge, .time-badge {
  font-size: 0.8rem; padding: 4px 10px; border-radius: var(--radius-sm);
  background: var(--surface2); color: var(--text-muted);
}
.session-detail-title { font-size: 1.4rem; font-weight: 700; line-height: 1.3; }
.status-banner {
  margin-top: 10px; padding: 8px 12px; border-radius: var(--radius-sm);
  font-size: 0.88rem; font-weight: 600;
}
.status-banner.completed { background: rgba(39,174,96,0.15); color: var(--success); }

.session-detail-grid { display: grid; grid-template-columns: 1fr 280px; gap: 20px; }
@media (max-width: 700px) { .session-detail-grid { grid-template-columns: 1fr; } }

.session-instructions-panel {
  background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); padding: 20px;
}
.session-instructions-panel h2 { font-size: 1rem; margin-bottom: 12px; color: var(--text-muted); }
.instructions-body { font-size: 0.95rem; line-height: 1.7; }
mark.cmd-word {
  background: rgba(52, 152, 219, 0.18);
  color: var(--accent);
  font-weight: 700;
  padding: 0 3px;
  border-radius: 3px;
  font-style: normal;
}
.after-notes-panel {
  margin-top: 20px; padding: 16px 18px; background: #fff5f5;
  border-radius: var(--radius-sm); border-left: 4px solid #e74c3c;
  border: 1px solid #f5c6c6;
}
.after-notes-panel h3 { font-size: 1rem; color: #c0392b; margin-bottom: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.06em; }
.after-notes-body { font-size: 1rem; color: #1a0000; line-height: 1.8; font-weight: 500; }
.after-notes-body strong { color: #c0392b; }
[data-theme="dark"] .after-notes-panel { background: #2a0a0a; border-color: #c0392b; border-left-color: #e74c3c; }
[data-theme="dark"] .after-notes-panel h3 { color: #e74c3c; }
[data-theme="dark"] .after-notes-body { color: #f5c6c6; }
[data-theme="dark"] .after-notes-body strong { color: #ff6b6b; }

.session-sidebar { display: flex; flex-direction: column; gap: 14px; flex-shrink: 0; }

/* Timer */
.timer-card {
  background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border);
  padding: 20px; text-align: center;
}
.timer-display {
  font-size: 3.2rem; font-weight: 800; font-family: 'Courier New', monospace;
  letter-spacing: 0.05em; margin-bottom: 14px; transition: color 0.3s;
}
.timer-controls { display: flex; gap: 8px; justify-content: center; margin-bottom: 12px; }
.timer-progress-bar {
  height: 6px; background: var(--surface2); border-radius: 3px; overflow: hidden;
}
.timer-fill { height: 100%; background: var(--accent); border-radius: 3px; transition: width 1s linear; }

/* Priority card */
.priority-card {
  background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border);
  padding: 16px; text-align: center;
}
.priority-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; margin-bottom: 4px; }
.priority-days { font-size: 2rem; font-weight: 800; margin-bottom: 4px; }
.priority-date { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 4px; }
.priority-room { font-size: 0.8rem; color: var(--text-dim); }

.session-actions-panel { display: flex; flex-direction: column; gap: 0; }
.reschedule-form { margin-top: 8px; padding: 12px; background: var(--surface2); border-radius: var(--radius-sm); }
.form-label { display: block; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 6px; }
.date-input {
  width: 100%; padding: 6px 10px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  font-size: 0.88rem; margin-bottom: 8px; font-family: var(--font);
}
.session-nav { display: flex; justify-content: space-between; gap: 8px; }
.session-nav-btn {
  font-size: 0.82rem; padding: 6px 12px; border-radius: var(--radius-sm);
  background: var(--surface2); color: var(--text-muted); border: 1px solid var(--border);
  flex: 1; text-align: center;
}
.session-nav-btn:hover { background: var(--surface); color: var(--text); text-decoration: none; }

/* ── SUBJECT HUB ── */
.subject-hub-layout { min-height: calc(100vh - 56px); display: flex; flex-direction: column; }
.subject-header {
  display: flex; gap: 20px; flex-wrap: wrap; align-items: flex-start;
  padding: 20px; background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border); margin-bottom: 20px;
}
.subject-header-left { flex: 1; min-width: 300px; }
.subject-hub-title { font-size: 1.35rem; font-weight: 800; margin-bottom: 8px; }
.subject-exam-info { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.exam-info-item { font-size: 0.82rem; color: var(--text-muted); }
.paper-structure-summary { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
.subject-header-right { display: flex; flex-direction: column; gap: 10px; align-items: flex-end; min-width: 200px; }
.subject-countdown { font-size: 2rem; font-weight: 800; text-align: right; }
.subject-progress-summary { width: 100%; }
.subject-progress-summary span { font-size: 0.8rem; color: var(--text-muted); }

/* Tabs */
.tab-bar {
  display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 20px; overflow-x: auto;
}
.tab {
  padding: 10px 18px; font-size: 0.9rem; color: var(--text-muted);
  border-bottom: 2px solid transparent; cursor: pointer; white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}
.tab:hover { color: var(--text); text-decoration: none; }
.tab.active { color: var(--text); font-weight: 600; }

.tab-content { min-height: 400px; }

/* Sessions list */
.sessions-list { display: flex; flex-direction: column; gap: 6px; }
.session-list-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px; background: var(--surface); border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.session-list-item.completed { opacity: 0.55; }
.session-list-item.skipped { opacity: 0.55; }
.session-list-number {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.82rem; font-weight: 700; color: #fff; flex-shrink: 0;
}
.session-list-body { flex: 1; }
.session-list-title { font-size: 0.92rem; font-weight: 600; }
.session-list-meta { display: flex; gap: 10px; font-size: 0.78rem; color: var(--text-muted); margin-top: 3px; }
.planned-date { color: var(--accent); }
.session-list-status { display: flex; gap: 6px; flex-shrink: 0; }
.session-grade-pill { display: inline-flex; align-items: center; padding: 1px 8px; border-radius: 20px; font-size: 0.73rem; font-weight: 700; white-space: nowrap; }
.session-grade-pill.prev { background: var(--bg-card); color: var(--text-muted); border: 1px solid var(--border); font-weight: 500; font-style: italic; }

/* Key knowledge */
.knowledge-search { margin-bottom: 16px; }
.search-input {
  width: 100%; padding: 9px 14px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 0.9rem; font-family: var(--font);
}
.search-input.large { font-size: 1rem; padding: 12px 16px; }
.search-input:focus { outline: none; border-color: var(--accent); }
.kk-section { margin-bottom: 24px; }
.kk-category-heading { font-size: 0.88rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 10px; }
.kk-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 10px; }
.kk-card {
  background: var(--surface); border-radius: var(--radius-sm); border: 1px solid var(--border);
  padding: 14px;
}
.kk-subject-tag {
  display: inline-block; font-size: 0.72rem; font-weight: 700; padding: 2px 8px;
  border-radius: 20px; color: #fff; margin-bottom: 6px;
}
.kk-name { font-weight: 700; font-size: 0.95rem; margin-bottom: 4px; }
.kk-category-tag { font-size: 0.72rem; color: var(--text-dim); margin-bottom: 6px; text-transform: uppercase; }
.kk-detail { font-size: 0.85rem; color: var(--text-muted); line-height: 1.55; }
.kk-tags { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 8px; }
.kk-tag {
  font-size: 0.7rem; padding: 2px 6px; background: var(--surface2);
  border-radius: var(--radius-sm); color: var(--text-dim);
}

/* Exam technique */
.technique-section { margin-bottom: 24px; }
.technique-category-heading { font-size: 0.88rem; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 10px; }
.technique-card {
  background: var(--surface); border-radius: var(--radius-sm); border: 1px solid var(--border);
  padding: 14px; margin-bottom: 8px;
}
.technique-card.tip-card { background: rgba(79,126,248,0.07); }
.technique-card.mark-card { background: rgba(243,156,18,0.07); }
.technique-title { font-weight: 700; font-size: 0.95rem; margin-bottom: 6px; }
.technique-detail { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }

/* ── PROGRESS ── */
.progress-layout { min-height: calc(100vh - 56px); display: flex; flex-direction: column; }
.page-title { font-size: 1.6rem; font-weight: 800; margin-bottom: 24px; }
.page-subtitle { color: var(--text-muted); margin-bottom: 24px; margin-top: -16px; }
.stats-row { display: flex; gap: 14px; margin-bottom: 28px; flex-wrap: wrap; }
.stat-card {
  flex: 1; min-width: 120px; background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border); padding: 16px; text-align: center;
}
.stat-value { font-size: 1.8rem; font-weight: 800; margin-bottom: 4px; }
.stat-label { font-size: 0.8rem; color: var(--text-muted); }
.subject-progress-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-bottom: 28px; }
.subject-progress-card {
  background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border);
  overflow: hidden; text-decoration: none; display: block; transition: transform 0.15s;
}
.subject-progress-card:hover { transform: translateY(-2px); text-decoration: none; }
.sp-header { padding: 10px 14px; display: flex; justify-content: space-between; align-items: center; }
.sp-name { font-size: 0.88rem; font-weight: 700; color: #fff; }
.sp-date { font-size: 0.78rem; color: rgba(255,255,255,0.75); }
.sp-body { padding: 14px; }
.sp-countdown { font-size: 1.4rem; font-weight: 800; margin-bottom: 8px; }
.sp-fraction { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; }
.rebuild-section { padding: 20px; background: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); }
.rebuild-section h2 { margin-bottom: 8px; }
.rebuild-section p { color: var(--text-muted); margin-bottom: 14px; font-size: 0.9rem; }

/* ── REFERENCE ── */
.reference-layout { min-height: calc(100vh - 56px); display: flex; flex-direction: column; }
.reference-search-form { margin-bottom: 24px; }
.search-bar-row { display: flex; gap: 10px; flex-wrap: wrap; }
.filter-select {
  padding: 9px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font-size: 0.88rem; font-family: var(--font);
}
.results-count { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 14px; }
.intro-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; margin-bottom: 16px; }
.intro-subject-card {
  background: var(--surface); border-radius: var(--radius-sm); border: 1px solid var(--border);
  padding: 14px; text-align: center; display: block; transition: transform 0.15s;
}
.intro-subject-card:hover { transform: translateY(-2px); text-decoration: none; }
.intro-subject-name { display: block; font-weight: 700; font-size: 0.9rem; margin-bottom: 6px; }
.intro-subject-exam { font-size: 0.8rem; color: var(--text-muted); }
.intro-hint { font-size: 0.85rem; color: var(--text-muted); }

/* Content topic */
.content-section { margin-bottom: 24px; }
.content-section-heading { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.content-topic-card { background: var(--surface); border-radius: var(--radius-sm); border: 1px solid var(--border); padding: 14px; margin-bottom: 8px; }
.content-topic-title { font-weight: 700; font-size: 0.92rem; margin-bottom: 6px; }
.content-topic-body { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }

/* ── GAPS ── */
.gap-form {
  background: var(--surface2); border-radius: var(--radius-sm); padding: 14px;
  margin-top: 12px; border: 1px solid var(--border);
}
.gap-form h4 { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 10px; font-weight: 600; }
.gap-input {
  width: 100%; padding: 8px 10px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 0.88rem; font-family: var(--font); resize: vertical;
}
.gap-input:focus { outline: none; border-color: var(--accent); }

.answer-editor {
  width: 100%; padding: 14px 16px; border-radius: var(--radius-sm);
  border: 2px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 1rem; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  line-height: 1.6; resize: vertical; min-height: 280px;
  transition: border-color 0.15s, box-shadow 0.15s;
  box-sizing: border-box;
}
.answer-editor:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.1);
}

.gap-list { display: flex; flex-direction: column; gap: 8px; }
.gap-item {
  background: var(--surface); border-radius: var(--radius-sm); border: 1px solid var(--border);
  padding: 12px; font-size: 0.88rem;
}
.gap-item.fixed { opacity: 0.55; color: var(--text-muted); }
.gap-item-text { margin-bottom: 8px; }
.gap-item-date { font-size: 0.75rem; color: var(--text-dim); margin-top: 6px; }
.gap-item-actions { display: flex; gap: 8px; margin-top: 8px; }
.gaps-indicator {
  background: rgba(243,156,18,0.1); border: 1px solid rgba(243,156,18,0.3);
  border-radius: var(--radius-sm); padding: 12px 14px; margin-bottom: 16px;
  font-size: 0.85rem; color: var(--text-muted);
}


/* ── ALERTS / BANNERS (new multi-student features) ── */
.alert {
  padding: 12px 16px; border-radius: var(--radius); border-left: 4px solid;
  font-size: 0.88rem; line-height: 1.5; margin-bottom: 16px;
}
.alert strong { font-weight: 700; }
.alert-exam  { background: rgba(231,76,60,0.08); border-color: var(--danger); color: var(--text); }
.alert-warn  { background: rgba(243,156,18,0.08); border-color: var(--warning); color: var(--text); }
.alert-info  { background: rgba(45,95,212,0.08); border-color: var(--accent); color: var(--text); }
.pre-exam-note { font-size: 0.78rem; font-weight: 600; color: var(--danger); margin-top: 6px; }
.pre-exam-note.soon { color: var(--warning); }

/* ── TOPIC ASSESSMENT ── */
.topic-assess-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--border);
}
.topic-assess-row:last-of-type { border-bottom: none; }
.topic-assess-title { font-size: 0.92rem; font-weight: 600; flex: 1; }
.topic-assess-buttons { display: flex; gap: 6px; flex-shrink: 0; }
.assess-btn {
  padding: 5px 12px; border: 1.5px solid var(--border); border-radius: 20px;
  font-size: 0.8rem; font-weight: 500; cursor: pointer; color: var(--text-muted);
  background: var(--surface2); transition: all 0.15s; user-select: none;
}
.assess-btn:hover { border-color: var(--accent); color: var(--accent); }
.assess-btn.selected.solid      { background: rgba(39,174,96,0.15); border-color: var(--success); color: var(--success); }
.assess-btn.selected.shaky      { background: rgba(243,156,18,0.15); border-color: var(--warning); color: var(--warning); }
.assess-btn.selected.not-covered { background: rgba(231,76,60,0.15); border-color: var(--danger); color: var(--danger); }

/* ── CALENDAR ── */
.cal-legend { display: flex; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
.cal-legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; color: var(--text-muted); }
.cal-dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.cal-dot.done      { background: var(--success); }
.cal-dot.scheduled { background: var(--accent); }
.cal-dot.deferred  { background: var(--warning); }
.cal-dot.exam      { background: var(--danger); }

.cal-grid { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.cal-header-row { display: grid; grid-template-columns: repeat(7, 1fr); background: var(--surface2); border-bottom: 1px solid var(--border); }
.cal-header-cell { padding: 6px; text-align: center; font-size: 0.78rem; font-weight: 700; color: var(--text-muted); }
.cal-week { display: grid; grid-template-columns: repeat(7, 1fr); border-bottom: 1px solid var(--border); }
.cal-week:last-child { border-bottom: none; }
.cal-day { min-height: 80px; padding: 6px; border-right: 1px solid var(--border); background: var(--surface); overflow: hidden; }
.cal-day:last-child { border-right: none; }
.cal-day.cal-past { background: var(--surface2); }
.cal-day.cal-today { background: rgba(45,95,212,0.06); }
.cal-day.cal-exam-day { background: rgba(231,76,60,0.05); }
.cal-day-num { font-size: 0.78rem; font-weight: 700; color: var(--text-muted); margin-bottom: 4px; display: flex; align-items: baseline; gap: 4px; }
.cal-today-num { color: var(--accent); }
.cal-month-label { font-size: 0.65rem; font-weight: 700; color: var(--text-dim); text-transform: uppercase; }
.cal-exam-badge { font-size: 0.65rem; font-weight: 700; text-transform: uppercase; padding: 2px 4px; border-radius: 3px; margin-bottom: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cal-session { display: block; text-decoration: none; border-left: 3px solid var(--border); border-radius: 3px; padding: 2px 4px; margin-bottom: 2px; font-size: 0.68rem; background: var(--surface2); overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.cal-session-subj { font-weight: 700; color: var(--text-muted); display: block; }
.cal-session-title { color: var(--text); }
.cal-session-completed { opacity: 0.5; }
.cal-session-deferred  { border-left-color: var(--warning) !important; }

/* ── LOGIN PAGE ── */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--bg); }
.login-wrap { width: 100%; max-width: 400px; padding: 20px; }
.login-card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 36px 32px; box-shadow: var(--shadow); }
.login-brand { text-align: center; margin-bottom: 28px; }
.login-icon { font-size: 36px; display: block; margin-bottom: 10px; }
.login-title { font-size: 22px; font-weight: 800; }
.login-sub { color: var(--text-muted); font-size: 0.9rem; margin-top: 4px; }
.login-error { background: rgba(231,76,60,0.1); color: var(--danger); border-radius: var(--radius-sm); padding: 10px 14px; margin-bottom: 16px; font-size: 0.85rem; }
.login-form .field { margin-bottom: 14px; }
.login-form label { display: block; font-size: 0.82rem; font-weight: 600; color: var(--text-muted); margin-bottom: 4px; }
.login-form input[type="text"], .login-form input[type="password"] { width: 100%; padding: 9px 12px; font-size: 0.95rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--surface2); color: var(--text); font-family: var(--font); }
.login-form input:focus { outline: none; border-color: var(--accent); }
.remember-label { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 18px; cursor: pointer; }
.btn-login { width: 100%; padding: 10px; font-size: 0.95rem; font-weight: 700; background: var(--accent); color: #fff; border: none; border-radius: var(--radius-sm); cursor: pointer; font-family: var(--font); }
.btn-login:hover { opacity: 0.9; }

/* ── PROFILE FORM ── */
.profile-wrap { max-width: 680px; }
.profile-section { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 16px; }
.profile-section h2 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
.field-group { margin-bottom: 18px; }
.field-group > label { display: block; font-size: 0.9rem; color: var(--text); margin-bottom: 10px; }
.field-hint { font-size: 0.78rem; color: var(--text-muted); margin-top: 6px; display: block; }
.option-row { display: flex; flex-wrap: wrap; gap: 8px; }
.option-pill input { display: none; }
.option-pill span { display: inline-block; padding: 7px 14px; border: 1.5px solid var(--border); border-radius: 20px; font-size: 0.85rem; font-weight: 500; cursor: pointer; transition: all 0.15s; color: var(--text-muted); }
.option-pill input:checked + span { border-color: var(--accent); background: var(--accent); color: #fff; }
.option-pill span:hover { border-color: var(--accent); color: var(--accent); }

/* ── SUBJECT SETUP ── */
.setup-papers-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.setup-paper-card { border: 2px solid var(--border); border-radius: var(--radius); cursor: pointer; transition: border-color 0.15s, transform 0.1s; overflow: hidden; background: var(--surface); }
.setup-paper-card:hover { border-color: var(--paper-colour, var(--accent)); transform: translateY(-1px); }
.setup-paper-card.selected { border-color: var(--paper-colour, var(--accent)); }
.setup-paper-header { padding: 8px 12px; }
.setup-paper-code { font-size: 0.72rem; font-weight: 700; color: rgba(255,255,255,0.9); }
.setup-paper-body { padding: 10px 12px; }
.setup-paper-name { font-size: 0.85rem; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.setup-paper-qual { font-size: 0.75rem; color: var(--text-muted); }
.setup-paper-sessions { font-size: 0.72rem; color: var(--text-dim); margin-top: 4px; }
.confidence-pills { display: flex; gap: 6px; margin-top: 4px; }
.confidence-pill { cursor: pointer; }
.confidence-pill input { display: none; }
.confidence-pill { display: inline-block; padding: 4px 10px; border: 1.5px solid var(--border); border-radius: 12px; font-size: 0.8rem; font-weight: 600; color: var(--text-muted); transition: all 0.15s; }
.confidence-pill.selected { border-color: var(--accent); background: var(--accent); color: #fff; }
.confidence-pill:hover { border-color: var(--accent); color: var(--accent); }

/* ── DASHBOARD SPLIT LAYOUT ── */
.dashboard-split { display: grid; grid-template-columns: 40% 1fr; gap: 24px; align-items: start; margin-top: 8px; width: 100%; }
@media (max-width: 900px) { .dashboard-split { grid-template-columns: 1fr; } }
.dashboard-aside { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 72px; }
.dashboard-main  { min-width: 0; }

/* ── COACH CARD ── */
.coach-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px; }
.coach-greeting { font-size: 0.78rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px; }
.coach-message { font-size: 1rem; line-height: 1.55; color: var(--text); margin-bottom: 16px; }
.coach-streak { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; font-weight: 600; color: var(--accent); margin-bottom: 14px; }
.streak-flame { font-size: 1.1rem; }
.coach-progress { margin-bottom: 12px; }
.coach-progress-bar { height: 6px; background: var(--border); border-radius: 3px; overflow: hidden; margin-bottom: 5px; }
.coach-progress-fill { height: 100%; background: var(--accent); border-radius: 3px; transition: width 0.4s ease; }
.coach-progress-label { font-size: 0.75rem; color: var(--text-muted); }
.coach-gaps { font-size: 0.82rem; margin-top: 4px; }
.coach-gaps a { color: var(--danger); text-decoration: none; }
.coach-gaps a:hover { text-decoration: underline; }

/* ── EXAM COUNTDOWN LIST ── */
.exam-countdown-list { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.exam-countdown-heading { padding: 12px 16px; font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); border-bottom: 1px solid var(--border); }
.exam-countdown-item { display: flex; align-items: center; justify-content: space-between; padding: 10px 16px; border-bottom: 1px solid var(--border); text-decoration: none; transition: background 0.1s; gap: 12px; }
.exam-countdown-item:last-child { border-bottom: none; }
.exam-countdown-item:hover { background: var(--surface-raised); }
.exi-left { display: flex; align-items: center; gap: 10px; min-width: 0; }
.exi-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
.exi-name { font-size: 0.82rem; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.exi-date { font-size: 0.72rem; color: var(--text-muted); margin-top: 1px; }
.exi-right { display: flex; flex-direction: column; align-items: flex-end; gap: 4px; flex-shrink: 0; }
.exi-days { font-size: 0.8rem; font-weight: 700; color: var(--text-muted); }
.exi-days.soon   { color: var(--warning, #e67e22); }
.exi-days.urgent { color: var(--danger); }
.exi-progress-bar { width: 60px; height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.exi-progress-fill { height: 100%; border-radius: 2px; }

/* ── DAY NAV ── */
.day-nav { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.day-nav-label { display: flex; flex-direction: column; flex: 1; }
.day-nav-label .date-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-muted); font-weight: 600; }
.day-nav-label .date-value { font-size: 1rem; font-weight: 700; color: var(--text); }

/* -- MISSED SESSIONS COLLAPSIBLE -- */
.missed-sessions-details { border-radius: var(--radius-sm); }
.missed-sessions-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 4px 0;
  list-style: none;
  user-select: none;
}
.missed-sessions-summary::-webkit-details-marker { display: none; }
.missed-sessions-summary::before {
  content: '▶';
  font-size: 0.65rem;
  color: var(--text-muted);
  transition: transform 0.15s;
  display: inline-block;
}
.missed-sessions-details[open] .missed-sessions-summary::before { transform: rotate(90deg); }
.missed-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  background: var(--danger);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: 10px;
}