/* ==========================================================================
   AI STUDY GURU — EXECUTIVE 3D ULTRA WORKSPACE THEME (2026-11 EDITION)
   World-Class AI Teacher Studio, Specialist Command Center & Glassmorphic UI
   100% DOM ID & JS Hook Compatible | Full Light & Dark Mode Support
   ========================================================================== */

:root {
  --u-indigo: #4f46e5;
  --u-indigo-bright: #6366f1;
  --u-violet: #7c3aed;
  --u-cyan: #0ea5e9;
  --u-emerald: #10b981;
  --u-amber: #f59e0b;
  --u-rose: #f43f5e;
  --u-grad-primary: linear-gradient(135deg, #4f46e5 0%, #6366f1 52%, #7c3aed 100%);
  --u-grad-cyber: linear-gradient(135deg, #2563eb 0%, #4f46e5 50%, #9333ea 100%);
  --u-grad-emerald: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --u-grad-telegram: linear-gradient(135deg, #38bdf8 0%, #0284c7 100%);
}

/* ── 1. Global Canvas & Ambient Mesh Lighting ────────────────────────────── */
body.tutor {
  --u-bg: #f4f7fe;
  --u-bg-mesh:
    radial-gradient(at 12% 8%, rgba(99, 102, 241, 0.11) 0px, transparent 48%),
    radial-gradient(at 88% 12%, rgba(14, 165, 233, 0.10) 0px, transparent 46%),
    radial-gradient(at 52% 92%, rgba(124, 58, 237, 0.08) 0px, transparent 50%),
    linear-gradient(180deg, #f8faff 0%, #f1f5fe 100%);
  --u-surface: rgba(255, 255, 255, 0.92);
  --u-surface-solid: #ffffff;
  --u-surface-subtle: #f8fafc;
  --u-surface-elevated: rgba(255, 255, 255, 0.97);
  --u-border: rgba(148, 163, 184, 0.24);
  --u-border-strong: rgba(99, 102, 241, 0.32);
  --u-text: #0f172a;
  --u-text-secondary: #334155;
  --u-text-muted: #64748b;
  --u-shadow-card: 0 10px 30px -6px rgba(15, 23, 42, 0.07), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
  --u-shadow-float: 0 22px 50px -12px rgba(30, 41, 59, 0.15), 0 8px 20px -4px rgba(30, 41, 59, 0.06);
  --u-shadow-glow: 0 10px 26px -4px rgba(79, 70, 229, 0.38);

  background: var(--u-bg-mesh) !important;
  color: var(--u-text);
}

body.tutor.wt-dark {
  --u-bg: #070b14;
  --u-bg-mesh:
    radial-gradient(at 15% 10%, rgba(79, 70, 229, 0.18) 0px, transparent 45%),
    radial-gradient(at 85% 14%, rgba(14, 165, 233, 0.12) 0px, transparent 45%),
    radial-gradient(at 50% 90%, rgba(124, 58, 237, 0.14) 0px, transparent 50%),
    linear-gradient(180deg, #070b14 0%, #0b1120 100%);
  --u-surface: rgba(15, 23, 42, 0.88);
  --u-surface-solid: #0f172a;
  --u-surface-subtle: #151f38;
  --u-surface-elevated: #1e293b;
  --u-border: rgba(148, 163, 184, 0.16);
  --u-border-strong: rgba(129, 140, 248, 0.42);
  --u-text: #f8fafc;
  --u-text-secondary: #e2e8f0;
  --u-text-muted: #94a3b8;
  --u-shadow-card: 0 12px 32px -6px rgba(0, 0, 0, 0.55), 0 4px 12px rgba(0, 0, 0, 0.35);
  --u-shadow-float: 0 24px 60px -12px rgba(0, 0, 0, 0.75);
  --u-shadow-glow: 0 10px 28px -4px rgba(99, 102, 241, 0.48);
}

/* ── 2. Auth / Sign-In Split Hero Studio (#auth) ─────────────────────────── */
body.tutor:not(.wt-in-workspace) .wt-welcome {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 28px;
  align-items: stretch;
  margin-top: 8px;
}

body.tutor:not(.wt-in-workspace) .wt-welcome > div:first-child {
  position: relative;
  overflow: hidden;
  padding: 42px 38px;
  border-radius: 26px;
  background:
    radial-gradient(circle at 85% 15%, rgba(99, 102, 241, 0.38) 0%, transparent 48%),
    radial-gradient(circle at 12% 88%, rgba(14, 165, 233, 0.28) 0%, transparent 46%),
    linear-gradient(145deg, #070b19 0%, #111836 48%, #1e1b4b 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.14) !important;
  box-shadow: 0 28px 68px -14px rgba(15, 23, 42, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.18) !important;
  color: #ffffff;
}

body.tutor:not(.wt-in-workspace) .wt-welcome h1 {
  font-size: clamp(2.05rem, 3.2vw, 2.85rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #ffffff 0%, #e0e7ff 65%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 14px;
}

/* 8-Specialist Showcase Grid inside Auth Hero */
.wt-specialist-showcase {
  margin: 18px 0 22px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.13);
  backdrop-filter: blur(12px);
}
.wt-specialist-showcase-title {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: #a5b4fc;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.wt-specialist-showcase-title::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 10px #34d399;
}
.wt-specialist-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.wt-spec-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 11px;
  border-radius: 11px;
  background: rgba(15, 23, 42, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8rem;
  font-weight: 600;
  color: #f1f5f9;
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.wt-spec-badge:hover {
  transform: translateY(-2px);
  border-color: rgba(129, 140, 248, 0.55);
  background: rgba(30, 41, 59, 0.72);
}
.wt-spec-badge small {
  display: block;
  font-size: 0.68rem;
  font-weight: 500;
  color: #94a3b8;
}

/* Auth Right Login Card */
body.tutor:not(.wt-in-workspace) .wt-welcome > .wt-panel {
  border-radius: 26px !important;
  background: var(--u-surface-elevated) !important;
  border: 1.5px solid var(--u-border-strong) !important;
  box-shadow: var(--u-shadow-float) !important;
  padding: 36px 32px !important;
  position: relative;
  overflow: hidden;
}
body.tutor:not(.wt-in-workspace) .wt-welcome > .wt-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: var(--u-grad-primary);
}

/* ── 3. Sidebar Command Center (#wt-sidebar) ─────────────────────────────── */
body.tutor.wt-in-workspace #wt-sidebar,
body.tutor.wt-in-workspace .wt-chatgpt-sidebar {
  width: 296px !important;
  min-width: 296px;
  background: linear-gradient(180deg, #080c17 0%, #0d1326 60%, #090e1c 100%) !important;
  border-right: 1px solid rgba(148, 163, 184, 0.14) !important;
  box-shadow: 8px 0 32px rgba(0, 0, 0, 0.22) !important;
}
body.tutor.wt-in-workspace #wt-sidebar.collapsed {
  margin-left: -296px !important;
}

/* Prominent + New Topic Button in Sidebar */
body.tutor.wt-in-workspace #new-chat-btn,
body.tutor.wt-in-workspace .wt-new-chat-btn {
  margin: 14px 14px 8px !important;
  padding: 11px 14px !important;
  border-radius: 14px !important;
  background: var(--u-grad-primary) !important;
  color: #ffffff !important;
  font-weight: 700 !important;
  font-size: 0.9rem !important;
  border: 1px solid rgba(255, 255, 255, 0.25) !important;
  border-bottom: 3px solid rgba(30, 27, 75, 0.65) !important;
  box-shadow: 0 8px 20px -4px rgba(79, 70, 229, 0.5) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  gap: 8px !important;
  cursor: pointer;
}
body.tutor.wt-in-workspace #new-chat-btn .wt-kbd {
  background: rgba(15, 23, 42, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #e0e7ff;
  padding: 2px 7px;
  border-radius: 6px;
  font-size: 0.7rem;
  font-family: var(--font-mono);
}

/* 2x3 Study Tools Bento Grid in Sidebar */
body.tutor.wt-in-workspace .wt-action-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
body.tutor.wt-in-workspace #wt-sidebar .wt-action-card {
  padding: 10px 12px !important;
  border-radius: 12px !important;
  background: rgba(255, 255, 255, 0.055) !important;
  border: 1px solid rgba(255, 255, 255, 0.1) !important;
  border-bottom: 2px solid rgba(255, 255, 255, 0.14) !important;
  color: #f8fafc !important;
  font-weight: 600 !important;
  font-size: 0.83rem !important;
  box-shadow: none !important;
  transition: all 0.18s ease !important;
}
body.tutor.wt-in-workspace #wt-sidebar .wt-action-card:hover {
  background: rgba(99, 102, 241, 0.22) !important;
  border-color: rgba(129, 140, 248, 0.45) !important;
  transform: translateY(-2px) !important;
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.25) !important;
}

/* Sidebar Week Tracker & Gamification Stats */
body.tutor.wt-in-workspace .wt-week-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
  margin: 10px 0 12px;
}
body.tutor.wt-in-workspace .wt-day {
  height: 28px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #94a3b8;
  font-size: 0.72rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}
body.tutor.wt-in-workspace .wt-day.today {
  border-color: #6366f1;
  color: #ffffff;
}
body.tutor.wt-in-workspace .wt-day.active {
  background: linear-gradient(135deg, #f59e0b 0%, #ea580c 100%);
  border-color: #fbbf24;
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.35);
}

body.tutor.wt-in-workspace .wt-gamification-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6px;
}
body.tutor.wt-in-workspace .wt-gstat {
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.07);
  display: flex;
  align-items: center;
  gap: 7px;
}
body.tutor.wt-in-workspace .wt-gstat strong {
  color: #f8fafc;
  font-size: 0.85rem;
  font-weight: 700;
}
body.tutor.wt-in-workspace .wt-gstat small {
  color: #94a3b8;
  font-size: 0.7rem;
}

/* Fix Sidebar Telegram Box Contrast */
body.tutor.wt-in-workspace .wt-sb-telegram-box {
  padding: 13px 14px !important;
  border-radius: 14px !important;
  background: linear-gradient(145deg, rgba(14, 165, 233, 0.16) 0%, rgba(2, 132, 199, 0.08) 100%) !important;
  border: 1px solid rgba(56, 189, 248, 0.32) !important;
  margin-bottom: 14px !important;
}
body.tutor.wt-in-workspace .wt-sb-telegram-box > div:first-child span:first-child {
  color: #38bdf8 !important;
}
body.tutor.wt-in-workspace .wt-sb-telegram-box p {
  color: #cbd5e1 !important;
  font-size: 0.78rem !important;
}

/* Sidebar Quota & Daily Spin Button */
body.tutor.wt-in-workspace .wt-sb-quota-wrap {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 9px;
}
body.tutor.wt-in-workspace .wt-quota {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 700;
  color: #e2e8f0;
}
body.tutor.wt-in-workspace .wt-spin-btn {
  width: 100%;
  padding: 9px 12px;
  border-radius: 10px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.82rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}
body.tutor.wt-in-workspace .wt-revision-link {
  font-size: 0.8rem;
  font-weight: 600;
  color: #a5b4fc !important;
}
body.tutor.wt-in-workspace .wt-sb-user-name {
  display: block;
  font-weight: 700;
  font-size: 0.86rem;
  color: #ffffff;
}
body.tutor.wt-in-workspace .wt-sb-user-meta {
  display: block;
  font-size: 0.72rem;
  color: #94a3b8;
}
body.tutor.wt-in-workspace .wt-sb-user-actions {
  display: flex;
  gap: 6px;
}
body.tutor.wt-in-workspace .wt-sb-icon-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #cbd5e1;
  display: grid;
  place-items: center;
  cursor: pointer;
}
body.tutor.wt-in-workspace .wt-sb-icon-btn:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #ffffff;
}

/* ── 4. Top Header Bar (.wt-chat-header) ─────────────────────────────────── */
body.tutor.wt-in-workspace .wt-chat-header {
  height: 62px !important;
  min-height: 62px !important;
  padding: 0 20px !important;
  background: var(--u-surface) !important;
  border-bottom: 1px solid var(--u-border) !important;
  backdrop-filter: blur(20px) saturate(160%) !important;
  -webkit-backdrop-filter: blur(20px) saturate(160%) !important;
  box-shadow: 0 2px 14px rgba(15, 23, 42, 0.04) !important;
}

body.tutor.wt-in-workspace .wt-dark-toggle {
  width: 38px;
  height: 38px;
  border-radius: 9999px;
  background: var(--u-surface-solid);
  border: 1px solid var(--u-border);
  color: var(--u-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.18s ease;
}
body.tutor.wt-in-workspace .wt-dark-toggle:hover {
  border-color: var(--u-indigo);
  transform: translateY(-1px);
}

/* ── 5. Tip Banner & Gamified Daily Quest Strip (#quest-strip) ───────────── */
body.tutor.wt-in-workspace .wt-tip-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 6px 20px;
  background: linear-gradient(90deg, rgba(79, 70, 229, 0.09) 0%, rgba(14, 165, 233, 0.08) 100%);
  border-bottom: 1px solid var(--u-border);
  font-size: 0.8rem;
  color: var(--u-text-secondary);
  flex-shrink: 0;
}
body.tutor.wt-in-workspace .wt-tip-banner.hidden,
body.tutor.wt-in-workspace .wt-tip-banner.wt-collapsed {
  display: none !important;
}
body.tutor.wt-in-workspace .wt-tip-text {
  margin: 0;
  flex: 1;
  font-weight: 500;
}
body.tutor.wt-in-workspace .wt-tip-close {
  background: transparent;
  border: none;
  color: var(--u-text-muted);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 2px 6px;
}

body.tutor.wt-in-workspace .wt-quest-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 7px 20px;
  background: var(--u-surface-subtle);
  border-bottom: 1px solid var(--u-border);
  font-size: 0.79rem;
  flex-shrink: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
body.tutor.wt-in-workspace .wt-quest-strip::-webkit-scrollbar {
  display: none;
}
body.tutor.wt-in-workspace .wt-quest-strip.wt-collapsed {
  display: none !important;
}
body.tutor.wt-in-workspace .wt-quest-streak {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-weight: 700;
  color: #d97706;
  white-space: nowrap;
}
body.tutor.wt-in-workspace .wt-quest-tasks {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
body.tutor.wt-in-workspace .wt-quest-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  border-radius: 9999px;
  background: var(--u-surface-solid);
  border: 1px solid var(--u-border);
  color: var(--u-text-secondary);
  font-weight: 600;
  font-size: 0.75rem;
}
body.tutor.wt-in-workspace .wt-quest-badge.completed {
  background: rgba(16, 185, 129, 0.14);
  border-color: rgba(16, 185, 129, 0.4);
  color: #059669;
}
body.tutor.wt-dark.wt-in-workspace .wt-quest-badge.completed {
  color: #34d399;
}
body.tutor.wt-in-workspace .wt-quest-coins {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 11px;
  border-radius: 9999px;
  background: rgba(245, 158, 11, 0.14);
  border: 1px solid rgba(245, 158, 11, 0.32);
  color: #b45309;
  font-weight: 700;
  white-space: nowrap;
}
body.tutor.wt-dark.wt-in-workspace .wt-quest-coins {
  color: #fbbf24;
}

/* ── 6. Multi-Row Study Controls Deck (#study-controls) ──────────────────── */
body.tutor.wt-in-workspace #study-controls {
  display: flex !important;
  flex-direction: column !important;
  align-items: stretch !important;
  height: auto !important;
  max-height: none !important;
  min-height: 0 !important;
  overflow: visible !important;
  padding: 9px 20px !important;
  gap: 7px !important;
  background: var(--u-surface) !important;
  border-bottom: 1px solid var(--u-border) !important;
  backdrop-filter: blur(16px);
  flex-shrink: 0;
}
body.tutor.wt-in-workspace #study-controls.wt-collapsed {
  display: none !important;
}

/* Teacher Modes Bar (All 13 Specialist Modes) */
body.tutor.wt-in-workspace #teacher-modes-bar {
  display: flex !important;
  align-items: center !important;
  gap: 7px !important;
  overflow-x: auto !important;
  overflow-y: hidden !important;
  padding: 2px 2px 4px !important;
  scrollbar-width: none;
}
body.tutor.wt-in-workspace #teacher-modes-bar::-webkit-scrollbar {
  display: none;
}

body.tutor #website-tutor .wt-mode-pill,
body.tutor.wt-in-workspace .wt-mode-pill {
  display: inline-flex !important;
  align-items: center !important;
  gap: 6px !important;
  padding: 6px 13px !important;
  border-radius: 9999px !important;
  background: var(--u-surface-solid) !important;
  border: 1px solid var(--u-border) !important;
  border-bottom: 2px solid rgba(100, 116, 139, 0.22) !important;
  color: var(--u-text-secondary) !important;
  font-size: 0.8rem !important;
  font-weight: 600 !important;
  white-space: nowrap !important;
  cursor: pointer !important;
  box-shadow: 0 2px 5px rgba(15, 23, 42, 0.04) !important;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

body.tutor #website-tutor .wt-mode-pill:hover,
body.tutor.wt-in-workspace .wt-mode-pill:hover {
  border-color: var(--u-indigo-bright) !important;
  color: var(--u-indigo) !important;
  transform: translateY(-1px) !important;
}
body.tutor.wt-dark #website-tutor .wt-mode-pill:hover,
body.tutor.wt-dark.wt-in-workspace .wt-mode-pill:hover {
  color: #a5b4fc !important;
}

/* CRITICAL FIX: High-contrast Active Teacher Mode Pill */
body.tutor #website-tutor .wt-mode-pill.active,
body.tutor.wt-in-workspace .wt-mode-pill.active {
  background: var(--u-grad-primary) !important;
  border-color: rgba(255, 255, 255, 0.28) !important;
  border-bottom: 2px solid rgba(30, 27, 75, 0.6) !important;
  color: #ffffff !important;
  font-weight: 700 !important;
  box-shadow: 0 6px 16px -3px rgba(79, 70, 229, 0.45) !important;
}
body.tutor #website-tutor .wt-mode-pill.active span,
body.tutor.wt-in-workspace .wt-mode-pill.active span {
  color: #ffffff !important;
}

/* Subjects & Chapter Sub-Bars */
body.tutor.wt-in-workspace #subjects-bar,
body.tutor.wt-in-workspace #chapter-bar {
  display: flex !important;
  align-items: center !important;
  gap: 6px !important;
  overflow-x: auto !important;
  scrollbar-width: none;
  padding: 1px 0 !important;
}
body.tutor.wt-in-workspace #subjects-bar::-webkit-scrollbar,
body.tutor.wt-in-workspace #chapter-bar::-webkit-scrollbar {
  display: none;
}
body.tutor.wt-in-workspace .wt-subj-caption,
body.tutor.wt-in-workspace .wt-chap-caption {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--u-text-muted);
  margin-right: 2px;
  white-space: nowrap;
}
body.tutor.wt-in-workspace .wt-subj-chip {
  padding: 4px 11px;
  border-radius: 9999px;
  background: var(--u-surface-subtle);
  border: 1px solid var(--u-border);
  color: var(--u-text-secondary);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.16s ease;
}
body.tutor.wt-in-workspace .wt-subj-chip:hover {
  border-color: var(--u-indigo-bright);
  color: var(--u-indigo);
}
body.tutor.wt-in-workspace .wt-subj-chip.active {
  background: var(--u-text);
  border-color: var(--u-text);
  color: var(--u-surface-solid) !important;
  font-weight: 700;
}

body.tutor.wt-in-workspace .wt-chap-scroll {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}
body.tutor.wt-in-workspace .wt-chap-scroll::-webkit-scrollbar {
  display: none;
}
body.tutor.wt-in-workspace .wt-chap-chip {
  padding: 3px 10px;
  border-radius: 8px;
  background: rgba(79, 70, 229, 0.06);
  border: 1px solid rgba(79, 70, 229, 0.18);
  color: var(--u-indigo);
  font-size: 0.74rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.16s ease;
}
body.tutor.wt-dark.wt-in-workspace .wt-chap-chip {
  background: rgba(99, 102, 241, 0.14);
  border-color: rgba(129, 140, 248, 0.28);
  color: #a5b4fc;
}
body.tutor.wt-in-workspace .wt-chap-chip:hover {
  background: var(--u-indigo);
  border-color: var(--u-indigo);
  color: #ffffff !important;
  transform: translateY(-1px);
}

/* ── 7. Welcome Desk (.wt-chatgpt-welcome) & Starter Bento Cards ─────────── */
body.tutor.wt-in-workspace #messages {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 22px clamp(14px, 4vw, 48px) 175px !important;
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 940px;
  margin: 0 auto;
  width: 100%;
  z-index: 10;
}

body.tutor.wt-in-workspace .wt-chatgpt-welcome {
  text-align: center;
  padding: 20px 18px 12px;
  max-width: 720px;
  margin: 0 auto;
}
body.tutor.wt-in-workspace .wt-desk-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 13px;
  border-radius: 9999px;
  background: rgba(79, 70, 229, 0.09);
  border: 1px solid rgba(79, 70, 229, 0.22);
  color: var(--u-indigo);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
body.tutor.wt-dark.wt-in-workspace .wt-desk-kicker {
  background: rgba(99, 102, 241, 0.18);
  border-color: rgba(129, 140, 248, 0.35);
  color: #a5b4fc;
}
body.tutor.wt-in-workspace .wt-desk-status {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #10b981;
  box-shadow: 0 0 8px #10b981;
}
body.tutor.wt-in-workspace .wt-welcome-mode-badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 9999px;
  background: var(--u-grad-primary);
  color: #ffffff;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 10px;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
}
body.tutor.wt-in-workspace .wt-chatgpt-prompts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  text-align: left;
  margin-top: 16px;
}
body.tutor.wt-in-workspace .wt-prompt-card {
  padding: 15px 17px !important;
  border-radius: 16px !important;
  background: var(--u-surface-solid) !important;
  border: 1.5px solid var(--u-border) !important;
  box-shadow: var(--u-shadow-card) !important;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1) !important;
}
body.tutor.wt-in-workspace .wt-prompt-card:hover {
  border-color: var(--u-indigo-bright) !important;
  transform: translateY(-3px) !important;
  box-shadow: 0 14px 30px -6px rgba(79, 70, 229, 0.18) !important;
}
body.tutor.wt-in-workspace .wt-prompt-top {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 5px;
}
body.tutor.wt-in-workspace .wt-prompt-icon {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: rgba(79, 70, 229, 0.1);
  display: grid;
  place-items: center;
  font-size: 1rem;
  flex-shrink: 0;
}
body.tutor.wt-in-workspace .wt-prompt-title {
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--u-text);
}
body.tutor.wt-in-workspace .wt-prompt-desc {
  font-size: 0.79rem;
  color: var(--u-text-muted);
  line-height: 1.42;
}
body.tutor.wt-in-workspace .wt-desk-note {
  margin-top: 14px !important;
  font-size: 0.78rem !important;
  color: var(--u-text-muted) !important;
}

/* ── 8. Conversation Stream Messages (article.wt-message) ────────────────── */
body.tutor.wt-in-workspace article.wt-message {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  width: 100%;
  animation: msgFadeUp 0.24s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes msgFadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
body.tutor.wt-in-workspace article.wt-message.user {
  justify-content: flex-end;
}

/* Assistant Message Card */
body.tutor.wt-in-workspace article.wt-message:not(.user) .wt-msg-content {
  flex: 1 1 auto;
  max-width: min(820px, 90%);
  background: var(--u-surface-solid) !important;
  border: 1px solid var(--u-border) !important;
  border-radius: 20px !important;
  border-top-left-radius: 6px !important;
  padding: 20px 24px !important;
  box-shadow: var(--u-shadow-card) !important;
  color: var(--u-text) !important;
  font-size: 0.95rem;
  line-height: 1.68;
}

/* User Message Bubble */
body.tutor.wt-in-workspace article.wt-message.user .wt-msg-content {
  max-width: min(680px, 84%);
  background: var(--u-grad-primary) !important;
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.2) !important;
  border-radius: 20px !important;
  border-bottom-right-radius: 6px !important;
  padding: 13px 18px !important;
  box-shadow: var(--u-shadow-glow) !important;
  font-size: 0.95rem;
  line-height: 1.55;
}
body.tutor.wt-in-workspace article.wt-message.user .wt-msg-content p {
  color: #ffffff !important;
  margin: 0;
}

/* Assistant Author Header & Specialist Verified Badge */
body.tutor.wt-in-workspace .wt-msg-author {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--u-indigo);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--u-border);
}
body.tutor.wt-dark.wt-in-workspace .wt-msg-author {
  color: #a5b4fc;
}
body.tutor.wt-in-workspace .wt-verified-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 9px;
  border-radius: 9999px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: #059669;
  font-size: 0.69rem;
  font-weight: 700;
  text-transform: none;
  letter-spacing: 0;
}
body.tutor.wt-dark.wt-in-workspace .wt-verified-pill {
  color: #34d399;
}

/* Interactive Specialist Toolbars inside Assistant Messages */
body.tutor.wt-in-workspace .wt-challenge-box,
body.tutor.wt-in-workspace .wt-derive-interactive-box,
body.tutor.wt-in-workspace .wt-grade-interactive-box,
body.tutor.wt-in-workspace .wt-feynman-interactive-box,
body.tutor.wt-in-workspace .wt-comp-interactive-box,
body.tutor.wt-in-workspace .wt-analogy-interactive-box,
body.tutor.wt-in-workspace .wt-pyq-interactive-box,
body.tutor.wt-in-workspace .wt-mm-interactive-box,
body.tutor.wt-in-workspace .wt-fc-interactive-box {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--u-surface-subtle);
  border: 1px solid var(--u-border-strong);
}

body.tutor.wt-in-workspace .wt-derive-header,
body.tutor.wt-in-workspace .wt-grade-header,
body.tutor.wt-in-workspace .wt-feynman-header,
body.tutor.wt-in-workspace .wt-pyq-header,
body.tutor.wt-in-workspace .wt-mm-header,
body.tutor.wt-in-workspace .wt-fc-header,
body.tutor.wt-in-workspace .wt-challenge-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 0.78rem;
  font-weight: 700;
}

body.tutor.wt-in-workspace .wt-derive-actions,
body.tutor.wt-in-workspace .wt-grade-actions,
body.tutor.wt-in-workspace .wt-feynman-actions,
body.tutor.wt-in-workspace .wt-pyq-actions,
body.tutor.wt-in-workspace .wt-mm-actions,
body.tutor.wt-in-workspace .wt-fc-actions,
body.tutor.wt-in-workspace .wt-challenge-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

body.tutor.wt-in-workspace .wt-derive-btn,
body.tutor.wt-in-workspace .wt-grade-btn,
body.tutor.wt-in-workspace .wt-feynman-btn,
body.tutor.wt-in-workspace .wt-pyq-btn,
body.tutor.wt-in-workspace .wt-mm-btn,
body.tutor.wt-in-workspace .wt-fc-btn,
body.tutor.wt-in-workspace .wt-ch-btn {
  padding: 7px 13px;
  border-radius: 10px;
  font-size: 0.79rem;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid var(--u-border);
  background: var(--u-surface-solid);
  color: var(--u-text);
  transition: all 0.16s ease;
}
body.tutor.wt-in-workspace .wt-derive-btn-primary,
body.tutor.wt-in-workspace .wt-grade-btn-primary,
body.tutor.wt-in-workspace .wt-feynman-btn-primary,
body.tutor.wt-in-workspace .wt-pyq-btn-primary,
body.tutor.wt-in-workspace .wt-mm-btn-primary,
body.tutor.wt-in-workspace .wt-ch-btn-primary {
  background: var(--u-grad-primary);
  color: #ffffff !important;
  border-color: transparent;
}
body.tutor.wt-in-workspace .wt-derive-btn:hover,
body.tutor.wt-in-workspace .wt-grade-btn:hover,
body.tutor.wt-in-workspace .wt-feynman-btn:hover,
body.tutor.wt-in-workspace .wt-pyq-btn:hover,
body.tutor.wt-in-workspace .wt-mm-btn:hover,
body.tutor.wt-in-workspace .wt-ch-btn:hover {
  transform: translateY(-1px);
  border-color: var(--u-indigo);
}

/* Message Utility Toolbar & Follow-Up Starter Chips */
body.tutor.wt-in-workspace .wt-msg-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--u-border);
}
body.tutor.wt-in-workspace .wt-msg-toolbar-btn,
body.tutor.wt-in-workspace .wt-reaction-btn {
  padding: 5px 11px;
  border-radius: 8px;
  background: var(--u-surface-subtle);
  border: 1px solid var(--u-border);
  color: var(--u-text-secondary);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.16s ease;
}
body.tutor.wt-in-workspace .wt-msg-toolbar-btn:hover,
body.tutor.wt-in-workspace .wt-reaction-btn:hover {
  border-color: var(--u-indigo-bright);
  color: var(--u-indigo);
}
body.tutor.wt-in-workspace .wt-reactions-wrap {
  margin-left: auto;
  display: inline-flex;
  gap: 5px;
}

body.tutor.wt-in-workspace .wt-study-starters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
body.tutor.wt-in-workspace .wt-starter-chip {
  padding: 5px 11px;
  border-radius: 9999px;
  background: rgba(79, 70, 229, 0.07);
  border: 1px solid rgba(79, 70, 229, 0.2);
  color: var(--u-indigo);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.16s ease;
}
body.tutor.wt-dark.wt-in-workspace .wt-starter-chip {
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(129, 140, 248, 0.3);
  color: #a5b4fc;
}
body.tutor.wt-in-workspace .wt-starter-chip:hover {
  background: var(--u-indigo);
  border-color: var(--u-indigo);
  color: #ffffff !important;
  transform: translateY(-1px);
}

/* ── 9. Floating Bottom Composer & Accelerator Bar ───────────────────────── */
body.tutor.wt-in-workspace .wt-composer-wrapper {
  padding: 10px 20px 16px !important;
  background: linear-gradient(to top, var(--u-bg) 74%, transparent) !important;
}

body.tutor.wt-in-workspace #study-accelerator-bar {
  max-width: 840px;
  margin: 0 auto 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
  pointer-events: auto;
  padding: 2px 2px;
}
body.tutor.wt-in-workspace #study-accelerator-bar::-webkit-scrollbar {
  display: none;
}
body.tutor.wt-in-workspace .wt-accel-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 11px;
  border-radius: 9999px;
  background: var(--u-surface-solid);
  border: 1px solid var(--u-border);
  color: var(--u-text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.04);
  transition: all 0.16s ease;
}
body.tutor.wt-in-workspace .wt-accel-chip:hover {
  border-color: var(--u-indigo-bright);
  color: var(--u-indigo);
  transform: translateY(-1px);
}

body.tutor.wt-in-workspace .wt-compose-capsule {
  background: var(--u-surface-solid) !important;
  border: 1.5px solid var(--u-border-strong) !important;
  border-radius: 22px !important;
  padding: 7px 9px 7px 11px !important;
  box-shadow: var(--u-shadow-float) !important;
}
body.tutor.wt-in-workspace .wt-compose-capsule:focus-within {
  border-color: var(--u-indigo) !important;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2), var(--u-shadow-float) !important;
}

body.tutor.wt-in-workspace .wt-upload-btn,
body.tutor.wt-in-workspace .wt-voice-btn,
body.tutor.wt-in-workspace .wt-tool-btn {
  width: 38px;
  height: 38px;
  border-radius: 9999px;
  border: 1px solid var(--u-border);
  background: var(--u-surface-subtle);
  color: var(--u-text-secondary);
  display: grid;
  place-items: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.16s ease;
}
body.tutor.wt-in-workspace .wt-upload-btn input[type="file"] {
  display: none;
}
body.tutor.wt-in-workspace .wt-upload-btn:hover,
body.tutor.wt-in-workspace .wt-voice-btn:hover,
body.tutor.wt-in-workspace .wt-tool-btn:hover {
  border-color: var(--u-indigo-bright);
  color: var(--u-indigo);
  background: rgba(79, 70, 229, 0.08);
}
body.tutor.wt-in-workspace #record.recording {
  background: var(--u-rose) !important;
  border-color: var(--u-rose) !important;
  color: #ffffff !important;
  animation: micPulse 1s infinite alternate;
}

body.tutor.wt-in-workspace .wt-sym-btn {
  padding: 5px 9px;
  border-radius: 7px;
  background: var(--u-surface-subtle);
  border: 1px solid var(--u-border);
  color: var(--u-text);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
}
body.tutor.wt-in-workspace .wt-sym-btn:hover {
  border-color: var(--u-indigo);
  color: var(--u-indigo);
}

@media (max-width: 900px) {
  body.tutor:not(.wt-in-workspace) .wt-welcome {
    grid-template-columns: 1fr;
  }
  .wt-specialist-grid {
    grid-template-columns: 1fr;
  }
  body.tutor.wt-in-workspace .wt-chatgpt-prompts {
    grid-template-columns: 1fr;
  }
}