/* ===== CyberHeroesHQ — Teacher Dashboard CSS ===== */
/* Design: Clean, professional, ISTE-friendly. Google Classroom polish.
   Deliberately different from the dark anime kid UI.
   Now imports shared dashboard-system.css and extends it. */

/* Load shared design system first */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ── Teacher role skin — map teacher.css tokens to ds-* tokens ─────────────── */
:root {
  --ds-primary:       #2563eb;
  --ds-primary-hover:#1d4ed8;
  --ds-primary-light: #eff6ff;
  --ds-accent:        #7c3aed;
  --ds-surface:       #ffffff;
  --ds-surface-2:    #f8fafc;
  --ds-border:       #e2e8f0;
  --ds-border-light: #f1f5f9;
  --ds-text:         #0f172a;
  --ds-text-muted:   #64748b;
  --ds-text-dim:     #94a3b8;
  --ds-bg:           #f8fafc;
  --ds-success:      #22c55e;
  --ds-success-light:#dcfce7;
  --ds-warning:      #f59e0b;
  --ds-warning-light:#fef3c7;
  --ds-danger:       #ef4444;
  --ds-danger-light: #fee2e2;
  --ds-info:         #0ea5e9;
  --ds-info-light:   #e0f2fe;
  --ds-radius-sm:    6px;
  --ds-radius-md:    10px;
  --ds-radius-lg:    14px;
  --ds-radius-xl:    20px;
  --ds-shadow-sm:    0 1px 2px rgba(0,0,0,0.06);
  --ds-shadow-md:    0 4px 12px rgba(0,0,0,0.08);
  --ds-shadow-lg:    0 8px 24px rgba(0,0,0,0.10);
  --ds-font:         'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --ds-nav-h:        58px;
  --ds-sidebar-w:    0px;
  /* Backward-compat aliases for remaining t-* CSS rules */
  --font: var(--ds-font);
  --white: var(--ds-surface);
  --shadow-sm: var(--ds-shadow-sm);
  --shadow-md: var(--ds-shadow-md);
  --shadow-lg: var(--ds-shadow-lg);
  --radius-sm: var(--ds-radius-sm);
  --radius-md: var(--ds-radius-md);
  --radius-lg: var(--ds-radius-lg);
  --blue-600: var(--ds-primary);
  --blue-500: var(--ds-primary-hover);
  --blue-50:  var(--ds-primary-light);
  --green-100: var(--ds-success-light);
  --amber-100: var(--ds-warning-light);
  --red-100:   var(--ds-danger-light);
  --slate-900: var(--ds-text);
  --slate-800: var(--ds-text);
  --slate-700: var(--ds-text);
  --slate-600: var(--ds-text-muted);
  --slate-500: var(--ds-text-muted);
  --slate-400: var(--ds-text-dim);
  --slate-300: var(--ds-text-dim);
  --slate-200: var(--ds-border);
  --slate-100: var(--ds-surface-2);
  --slate-50:  var(--ds-bg);
}

/* ── Reset / base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ds-text);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue-600); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Auth pages ──────────────────────────────────────────────────────────── */
.teacher-auth-page {
  background: var(--ds-bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.t-auth-wrap {
  width: 100%;
  max-width: 440px;
}

.t-auth-card {
  background: var(--white);
  border: 1px solid var(--ds-border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
}

.t-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.t-brand-icon { font-size: 1.4rem; }

.t-brand-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ds-text);
}

.t-brand-sub {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--ds-text-400);
  background: var(--ds-text-100);
  padding: 2px 8px;
  border-radius: 20px;
}

.t-auth-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ds-text);
  margin-bottom: 6px;
}

.t-auth-sub {
  color: var(--ds-text-600);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.t-auth-footer {
  font-size: 0.85rem;
  color: var(--ds-text-600);
  margin-top: 16px;
  text-align: center;
}

/* ── Forms ───────────────────────────────────────────────────────────────── */
.t-form { display: flex; flex-direction: column; gap: 16px; }

.t-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.t-field label {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--ds-text-700);
}

.t-optional {
  font-weight: 400;
  color: var(--ds-text-400);
}

.t-field input,
.t-field select {
  font-family: var(--font);
  font-size: 0.95rem;
  padding: 10px 14px;
  border: 1.5px solid var(--ds-border);
  border-radius: var(--ds-radius-sm);
  outline: none;
  transition: border-color 0.15s;
  color: var(--ds-text);
  background: var(--ds-surface);
}

.t-field input:focus,
.t-field select:focus {
  border-color: var(--ds-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

/* Teacher-specific overrides for ds-btn (already defined in dashboard-system.css) */
.t-btn-primary,
.t-btn-secondary,
.t-btn-ghost,
.t-btn-logout { display: none; } /* Use .ds-btn-* instead */

/* ── Alerts (teacher-specific variants) ─────────────────────────────────── */
.t-alert {
  padding: 12px 16px;
  border-radius: var(--ds-radius-sm);
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 20px;
}
.t-alert-error { background: var(--ds-danger-light); color: #b91c1c; border: 1px solid #fca5a5; }
.t-alert-info  { background: var(--ds-primary-light); color: #1d4ed8; border: 1px solid #93c5fd; }

/* ── App shell (dashboard pages) ────────────────────────────────────────── */
.teacher-app-page {
  background: var(--ds-bg);
  min-height: 100vh;
}

/* ── Teacher-specific component extensions ─────────────────────────────── */

/* Classroom cards */
.t-classroom-card {
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  padding: 24px;
  box-shadow: var(--ds-shadow-sm);
  transition: box-shadow 0.15s;
}
.t-classroom-card:hover { box-shadow: var(--ds-shadow-md); }

.t-join-code {
  font-size: 0.78rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  color: var(--ds-primary);
  background: var(--ds-primary-light);
  border: 1px solid rgba(37,99,235,0.2);
  border-radius: 6px;
  padding: 4px 10px;
  white-space: nowrap;
  letter-spacing: 0.05em;
}

/* ── Table ───────────────────────────────────────────────────────────────── */
.t-roster-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.t-section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ds-text);
}

.t-section-sub {
  font-size: 0.88rem;
  color: var(--ds-text-muted);
  margin-top: 4px;
  margin-bottom: 18px;
}

.t-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.t-table thead tr {
  background: var(--ds-surface-2);
  border-bottom: 1px solid var(--ds-border);
}

.t-table th {
  padding: 12px 16px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ds-text-muted);
}

.t-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--ds-border-light);
  vertical-align: middle;
  color: var(--ds-text);
}

.t-table tbody tr:last-child td { border-bottom: none; }
.t-table tbody tr:hover td { background: var(--ds-surface-2); }

.t-num-col { text-align: center; }

.t-student-name {
  font-weight: 600;
  color: var(--ds-text);
  line-height: 1.3;
}

.t-student-username {
  font-size: 0.8rem;
  color: var(--ds-text-dim);
  margin-top: 2px;
}

.t-level-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ds-text-muted);
  background: var(--ds-surface-2);
  padding: 3px 8px;
  border-radius: 20px;
}

.t-xp-val {
  font-weight: 600;
  color: var(--ds-primary);
}

.t-missions-badge {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ds-text-muted);
  background: var(--ds-surface-2);
  padding: 3px 10px;
  border-radius: 20px;
}

.t-missions-badge.all-done {
  color: #15803d;
  background: var(--ds-success-light);
}

.t-date { color: var(--ds-text-muted); font-size: 0.85rem; }
.t-muted { color: var(--ds-text-dim); }

/* ── Report page ─────────────────────────────────────────────────────────── */
.t-report-section {
  background: var(--ds-surface);
  border: 1px solid var(--ds-border);
  border-radius: var(--ds-radius-lg);
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--ds-shadow-sm);
}

.t-mission-stats { display: flex; flex-direction: column; gap: 16px; }

.t-mission-stat-row {
  display: flex;
  align-items: center;
  gap: 20px;
}

.t-mission-stat-info { flex: 1; min-width: 0; }

.t-mission-stat-name {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ds-text);
  margin-bottom: 2px;
}

.t-mission-stat-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--ds-text-500);
  flex-wrap: wrap;
}

.t-dot { color: var(--ds-text-300); }

.t-progress-col {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 200px;
  flex-shrink: 0;
}

.t-progress-bar-wrap {
  flex: 1;
  height: 10px;
  background: var(--ds-text-100);
  border-radius: 5px;
  overflow: hidden;
}

.t-progress-bar-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.4s ease;
}

.t-progress-pct {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ds-text-700);
  width: 36px;
  text-align: right;
}

/* Most missed questions */
.t-missed-list { display: flex; flex-direction: column; gap: 12px; }

.t-missed-item {
  padding: 16px 20px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: var(--radius-md);
}

.t-missed-mission {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #92400e;
  margin-bottom: 4px;
}

.t-missed-question {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ds-text);
  margin-bottom: 6px;
}

.t-missed-answer {
  font-size: 0.82rem;
  color: var(--ds-text-600);
}

/* ── Modal ───────────────────────────────────────────────────────────────── */
.t-modal {
  border: none;
  border-radius: var(--radius-lg);
  padding: 0;
  max-width: 460px;
  width: 100%;
  box-shadow: var(--shadow-lg);
}

.t-modal::backdrop {
  background: rgba(15,23,42,0.5);
  backdrop-filter: blur(4px);
}

.t-modal-inner {
  padding: 32px;
}

.t-modal-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ds-text);
  margin-bottom: 6px;
}

.t-modal-sub {
  font-size: 0.88rem;
  color: var(--ds-text-500);
  margin-bottom: 24px;
}

.t-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 8px;
}

/* ── Dashboard two-column layout ─────────────────────────────────────────── */
.t-dash-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 28px;
  align-items: start;
}

.t-dash-main {}
.t-dash-sidebar {}

/* ── Activity feed ───────────────────────────────────────────────────────── */
.t-activity-feed {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--ds-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
}

.t-activity-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--ds-text-100);
}

.t-activity-item:last-child {
  border-bottom: none;
}

.t-activity-avatar {
  font-size: 1.4rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 2px;
}

.t-activity-body {
  flex: 1;
  font-size: 0.84rem;
  color: var(--ds-text-700);
  line-height: 1.4;
}

.t-activity-name {
  font-weight: 600;
  color: var(--ds-text);
}

.t-activity-mission {
  font-weight: 500;
  color: var(--blue-600);
}

.t-activity-class {
  color: var(--ds-text-500);
  font-size: 0.8rem;
}

.t-activity-score {
  font-size: 0.8rem;
  color: var(--green-500);
  margin-top: 2px;
}

.t-activity-time {
  font-size: 0.75rem;
  color: var(--ds-text-400);
  white-space: nowrap;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ── Progress matrix ─────────────────────────────────────────────────────── */
.t-matrix-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--ds-border);
  box-shadow: var(--shadow-sm);
}

.t-matrix-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
  min-width: 480px;
}

.t-matrix-table thead th {
  background: var(--ds-bg);
  border-bottom: 2px solid var(--ds-border);
  padding: 10px 8px;
  font-weight: 600;
  color: var(--ds-text-700);
  text-align: center;
}

.t-matrix-student-col {
  text-align: left !important;
  min-width: 130px;
  padding-left: 14px !important;
}

.t-matrix-mission-col {
  min-width: 90px;
}

.t-matrix-mission-label {
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100px;
}

.t-matrix-table tbody tr {
  border-bottom: 1px solid var(--ds-text-100);
}

.t-matrix-table tbody tr:hover {
  background: var(--ds-bg);
}

.t-matrix-cell {
  text-align: center;
  padding: 8px 6px;
  vertical-align: middle;
  font-size: 0.82rem;
}

.t-matrix-done {
  background: #f0fdf4;
  color: #16a34a;
  font-weight: 700;
}

.t-matrix-inprog {
  background: #fef3c7;
  color: #d97706;
}

.t-matrix-empty {
  color: var(--ds-text-300);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .t-dash-layout { grid-template-columns: 1fr; }
  .t-dash-sidebar { order: -1; }
}

@media (max-width: 640px) {
  .t-auth-card { padding: 28px 20px; }
  .t-page-header { flex-direction: column; }
  .t-mission-stat-row { flex-direction: column; align-items: flex-start; }
  .t-progress-col { width: 100%; }
  .t-classroom-grid { grid-template-columns: 1fr; }
  .t-table { font-size: 0.82rem; }
  .t-table th, .t-table td { padding: 10px 12px; }
}

@media print {
  .t-nav, .t-header-actions, .t-btn-ghost, .t-btn-secondary { display: none !important; }
  .t-main { padding: 0; }
  .t-report-section { box-shadow: none; border: 1px solid #ddd; }
}

/* ===== CIPHER AI: Knowledge Gaps panel ===== */
.t-gaps-list { display: flex; flex-direction: column; gap: 10px; }

.t-gap-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border-radius: 10px;
  border-left: 4px solid #94a3b8;
  background: #f8fafc;
}
.t-gap-item.gap-high { border-left-color: #ef4444; background: #fef2f2; }
.t-gap-item.gap-med  { border-left-color: #f59e0b; background: #fffbeb; }
.t-gap-item.gap-low  { border-left-color: #64748b; background: #f8fafc; }

.t-gap-concept { font-weight: 700; font-size: 0.9rem; color: #1e293b; }
.t-gap-mission { font-size: 0.8rem; color: #64748b; }
.t-gap-meta { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; }
.t-gap-students { font-weight: 600; color: #334155; }

/* ── Leaderboard & Streak ──────────────────────────────────────────────────── */
.t-lb-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}
.t-lb-toggle {
  display: flex;
  gap: 4px;
}
.t-lb-toggle-btn {
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--ds-border);
  background: var(--white);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ds-text-600);
  cursor: pointer;
  transition: all 0.15s;
}
.t-lb-toggle-btn.active {
  background: var(--blue-600);
  color: #fff;
  border-color: var(--blue-600);
}
.t-lb-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.t-lb-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: var(--ds-bg);
  border: 1px solid var(--ds-text-100);
  transition: background 0.1s;
}
.t-lb-row.rank-1 { background: #fef9ec; border-color: #fde68a; }
.t-lb-row.rank-2 { background: #f7f7f7; border-color: #d1d5db; }
.t-lb-row.rank-3 { background: #fef6ee; border-color: #fed7aa; }
.t-lb-medal { font-size: 1.25rem; width: 28px; text-align: center; flex-shrink: 0; }
.t-lb-rank-num { font-size: 0.85rem; font-weight: 700; color: var(--ds-text-400); width: 24px; text-align: center; flex-shrink: 0; }
.t-lb-name { font-weight: 600; font-size: 0.95rem; color: var(--ds-text); flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.t-lb-badges { font-size: 0.82rem; color: var(--ds-text-500); flex-shrink: 0; }
.t-lb-xp { font-weight: 700; font-size: 0.95rem; color: var(--blue-600); flex-shrink: 0; white-space: nowrap; }
.t-lb-streak { font-size: 0.8rem; color: #d97706; flex-shrink: 0; }

/* Class streak meter */
.t-streak-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}
.t-streak-icon { font-size: 2rem; }
.t-streak-body { flex: 1; }
.t-streak-count { font-size: 1.5rem; font-weight: 700; color: #ea580c; line-height: 1; }
.t-streak-label { font-size: 0.85rem; color: #9a3412; margin-top: 2px; }
.t-streak-zero .t-streak-count { color: var(--ds-text-400); }
.t-streak-zero .t-streak-icon { filter: grayscale(1); opacity: 0.5; }
.t-gap-misses { color: #94a3b8; }

/* ── Invite a Colleague panel ─────────────────────────────────────────────── */
.t-invite-panel {
  background: linear-gradient(135deg, #ecfdf5, #eff6ff);
  border: 1px solid #a7f3d0;
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin-bottom: 28px;
}

.t-invite-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.t-invite-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.t-invite-icon { font-size: 2rem; }

.t-invite-title {
  font-size: 1rem;
  font-weight: 700;
  color: #065f46;
  margin-bottom: 3px;
}

.t-invite-sub {
  font-size: 0.85rem;
  color: #047857;
  line-height: 1.5;
}

.t-btn-invite {
  background: #10b981;
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  padding: 10px 18px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}
.t-btn-invite:hover { background: #059669; }

/* Expanded referral panel */
.t-referral-expanded {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid #a7f3d0;
}

.t-referral-link-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.t-referral-input {
  flex: 1;
  background: #fff;
  border: 1px solid var(--ds-border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-size: 0.85rem;
  color: var(--ds-text-700);
  font-family: monospace;
}

.t-btn-copy {
  background: #0ea5e9;
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}
.t-btn-copy:hover { background: #0284c7; }

.t-referral-snippets {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.t-snippet-btn {
  background: #f1f5f9;
  border: 1px solid var(--ds-border);
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ds-text-700);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
.t-snippet-btn:hover { background: var(--ds-text-100); border-color: var(--ds-text-300); }

.t-snippet-box {
  background: #fff;
  border: 1px solid var(--ds-border);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 12px;
  position: relative;
}

.t-snippet-text {
  width: 100%;
  border: none;
  outline: none;
  resize: vertical;
  font-size: 0.82rem;
  color: var(--ds-text-700);
  background: transparent;
  font-family: inherit;
  line-height: 1.6;
}

.t-btn-copy-sm {
  background: #f1f5f9;
  border: 1px solid var(--ds-border);
  border-radius: var(--radius-sm);
  padding: 5px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--ds-text-700);
  margin-top: 8px;
}
.t-btn-copy-sm:hover { background: var(--ds-text-100); }

.t-referral-stats {
  display: flex;
  gap: 24px;
  margin-bottom: 12px;
}

.t-ref-stat {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.t-ref-num {
  font-size: 1.5rem;
  font-weight: 700;
  color: #065f46;
  line-height: 1;
}

.t-ref-lbl {
  font-size: 0.78rem;
  color: #047857;
  margin-top: 2px;
}

.t-colleague-list {
  background: #fff;
  border: 1px solid #a7f3d0;
  border-radius: var(--radius-md);
  padding: 14px;
}

.t-colleague-title {
  font-size: 0.82rem;
  font-weight: 700;
  color: #065f46;
  margin-bottom: 8px;
}

.t-colleague-item {
  font-size: 0.85rem;
  color: var(--ds-text-700);
  padding: 5px 0;
  border-bottom: 1px solid var(--ds-text-100);
}
.t-colleague-item:last-child { border-bottom: none; }

/* ── AI Insights ──────────────────────────────────────────────────────────── */
.t-insights-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  color: #7c3aed;
  background: rgba(124,58,237,0.08);
  border: 1px solid rgba(124,58,237,0.2);
  border-radius: 20px;
  padding: 2px 10px;
  vertical-align: middle;
  margin-left: 8px;
}
.t-insights-loading {
  font-size: 13px;
  color: var(--ds-text-400, #94a3b8);
  padding: 16px 0;
}
.t-insights-card {
  background: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 18px 20px;
  margin-bottom: 20px;
}
.t-insights-card-title {
  font-size: 13px;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}
.t-topic-gaps-body { display: flex; flex-direction: column; gap: 8px; }
.t-gap-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.t-gap-label {
  font-size: 12px;
  color: #475569;
  width: 100px;
  flex-shrink: 0;
  text-align: right;
}
.t-gap-bar-track {
  flex: 1;
  height: 8px;
  background: #f1f5f9;
  border-radius: 4px;
  overflow: hidden;
}
.t-gap-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease;
}
.t-gap-pct {
  font-size: 11px;
  color: #64748b;
  width: 80px;
  flex-shrink: 0;
}
.t-topic-pill {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  border-radius: 10px;
  padding: 2px 8px;
  margin: 1px 2px;
  letter-spacing: 0.03em;
}
.t-topic-weak {
  background: #fef2f2;
  color: #b91c1c;
  border: 1px solid #fecaca;
}
.ai-tier {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  border-radius: 6px;
  padding: 2px 8px;
}
.ai-tier-std { background: #f8fafc; color: #475569; border: 1px solid #e2e8f0; }
.ai-tier-ch  { background: #fff7ed; color: #c2410c; border: 1px solid #fdba74; }
.ai-tier-ex  { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }
.t-section-header { display: flex; align-items: center; gap: 8px; }

/* ── Small phones (≤480px) ────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .t-main { padding: 16px; }
  .t-nav-inner { padding: 0 16px; }
  .t-section { padding: 16px; }
  .t-card { padding: 16px; }
  .t-page-header h1 { font-size: 1.3rem; }
  .t-table { font-size: 0.78rem; }
  .t-table th, .t-table td { padding: 8px 10px; }
  /* Prevent iOS auto-zoom on inputs */
  input, select, textarea { font-size: 16px !important; }
}

/* ── Mobile hamburger (shared with parent/principal) ────────────────────── */
.ds-mobile-toggle {
  display: none;
  background: none;
  border: 1.5px solid var(--ds-border);
  border-radius: var(--ds-radius-sm);
  padding: 5px 8px;
  font-size: 16px;
  cursor: pointer;
  color: var(--ds-text-muted);
  margin-right: 8px;
}

@media (max-width: 768px) {
  .ds-mobile-toggle { display: block; }
  #ds-nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--ds-nav-h);
    left: 0; right: 0;
    background: var(--ds-surface);
    border-bottom: 1px solid var(--ds-border);
    padding: 8px 16px 16px;
    z-index: 99;
    gap: 4px;
  }
  #ds-nav-links.mobile-open { display: flex; }
  .ds-nav-link { padding: 8px 12px; font-size: 14px; }
}