@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ============================================================
   VERTEX CBT — main.css  v3
   Design system: motion-first, fewer cards, more breathing room
   ============================================================ */

/* ── Design Tokens — Soft Modern / iOS style ── */
:root {
  --accent:         #007AFF;
  --accent-hover:   #0068D6;
  --accent-active:  #0058B8;
  --accent-subtle:  rgba(0, 122, 255, 0.08);
  --accent-border:  rgba(0, 122, 255, 0.20);
  --accent-text:    #0068D6;

  --bg-base:        #ffffff;
  --bg-page:        #f2f2f7;
  --bg-subtle:      #f6f6f8;
  --bg-muted:       #ececef;
  --bg-overlay:     rgba(0, 0, 0, 0.32);

  --border:         #e5e5ea;
  --border-strong:  #d1d1d6;
  --border-focus:   var(--accent);

  --text-1:         #1c1c1e;
  --text-2:         #48484a;
  --text-3:         #8e8e93;
  --text-4:         #c7c7cc;
  --text-inverse:   #ffffff;
  --text-accent:    var(--accent-text);

  --success:        #34c759;
  --success-subtle: rgba(52, 199, 89, 0.08);
  --success-border: rgba(52, 199, 89, 0.22);
  --success-text:   #248a3d;

  --danger:         #ff3b30;
  --danger-subtle:  rgba(255, 59, 48, 0.08);
  --danger-border:  rgba(255, 59, 48, 0.22);
  --danger-text:    #d70015;

  --warning:        #ff9500;
  --warning-subtle: rgba(255, 149, 0, 0.08);
  --warning-border: rgba(255, 149, 0, 0.22);
  --warning-text:   #c93400;

  --info:           #32ade6;
  --info-subtle:    rgba(50, 173, 230, 0.08);
  --info-border:    rgba(50, 173, 230, 0.22);
  --info-text:      #0071a4;

  --font:           -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Plus Jakarta Sans', 'DM Sans', system-ui, sans-serif;
  --font-mono:      'SF Mono', 'JetBrains Mono', ui-monospace, 'Courier New', monospace;

  --text-xs:    0.6875rem;
  --text-sm:    0.8125rem;
  --text-base:  0.9375rem;
  --text-md:    1.0625rem;
  --text-lg:    1.1875rem;
  --text-xl:    1.375rem;
  --text-2xl:   1.75rem;
  --text-3xl:   2.25rem;
  --text-timer: 1.875rem;

  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1.0625rem;
  --sp-5:  1.4375rem;
  --sp-6:  2rem;
  --sp-8:  2.625rem;
  --sp-10: 3.625rem;

  --r-sm:  8px;
  --r-md:  12px;
  --r-lg:  16px;
  --r-xl:  20px;
  --r-2xl: 26px;
  --r-full: 9999px;

  --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
  --shadow-sm: 0 2px 8px rgba(0,0,0,.05), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 6px 20px rgba(0,0,0,.07), 0 2px 6px rgba(0,0,0,.04);
  --shadow-lg: 0 14px 34px rgba(0,0,0,.09), 0 4px 10px rgba(0,0,0,.05);
  --shadow-xl: 0 24px 56px rgba(0,0,0,.12), 0 8px 16px rgba(0,0,0,.06);
  --shadow-accent: 0 8px 22px rgba(0, 122, 255, 0.28);

  --ease:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --t-fast:  90ms;
  --t-base:  160ms;
  --t-slow:  260ms;
  --t-enter: 340ms;

  --t-question: 200ms;
  --t-ripple:   500ms;

  --glass-blur:         28px;
  --glass-saturate:     1.9;
  --glass-bg:           rgba(255, 255, 255, 0.78);
  --glass-bg-subtle:    rgba(248, 248, 250, 0.74);
  --glass-border:       rgba(255, 255, 255, 0.65);
  --glass-border-outer: rgba(0, 0, 0, 0.06);
  --glass-highlight:    rgba(255, 255, 255, 0.92);
  --glass-shadow:       0 12px 40px rgba(0, 0, 0, 0.09),
                        0 3px 10px  rgba(0, 0, 0, 0.05),
                        inset 0 1px 0 rgba(255, 255, 255, 0.9);
  --glass-shadow-sm:    0 3px 14px rgba(0, 0, 0, 0.06),
                        0 1px 4px  rgba(0, 0, 0, 0.04),
                        inset 0 1px 0 rgba(255, 255, 255, 0.85);
  --glass-shadow-xl:    0 26px 70px rgba(0, 0, 0, 0.14),
                        0 10px 24px  rgba(0, 0, 0, 0.07),
                        inset 0 1px 0 rgba(255, 255, 255, 0.9);

  --brand:           var(--accent);
  --brand-hover:     var(--accent-hover);
  --brand-active:    var(--accent-active);
  --brand-bg:        var(--accent-subtle);
  --brand-border:    var(--accent-border);
  --brand-text:      var(--accent-text);
  --amber:           var(--accent);
  --amber-hover:     var(--accent-hover);
  --amber-active:    var(--accent-active);
  --amber-bg:        var(--accent-subtle);
  --amber-border:    var(--accent-border);
  --amber-text:      var(--accent-text);
  --ink-900:         var(--text-1);
  --ink-800:         var(--text-2);
  --ink-700:         var(--text-2);
  --ink-600:         var(--text-3);
  --ink-400:         var(--text-4);
  --ink-300:         var(--text-4);
  --ink-200:         var(--border);
  --ink-100:         var(--bg-subtle);
  --surface:         var(--bg-base);
  --surface-white:   var(--bg-base);
  --surface-1:       var(--bg-subtle);
  --surface-2:       var(--bg-muted);
  --surface-subtle:  var(--bg-subtle);
  --surface-muted:   var(--bg-muted);
  --page-bg:         var(--bg-page);
  --text-primary:    var(--text-1);
  --text-secondary:  var(--text-2);
  --text-tertiary:   var(--text-3);
  --text-disabled:   var(--text-4);
  --border-medium:   var(--border-strong);
  --c-surface:       var(--bg-base);
  --c-surface-2:     var(--bg-subtle);
  --c-border:        var(--border);
  --c-border-3:      var(--border-strong);
  --c-text:          var(--text-1);
  --c-text-2:        var(--text-2);
  --c-text-3:        var(--text-3);
  --c-text-4:        var(--text-4);
  --c-brand:         var(--accent);
  --c-brand-light:   var(--accent-subtle);
  --c-brand-text:    var(--accent-text);
  --c-brand-border:  var(--accent-border);
  --c-warning:       var(--warning);
  --c-warning-light: var(--warning-subtle);
  --c-danger:        var(--danger);
  --c-success:       var(--success);
  --c-info:          var(--info);
  --success-bg:      var(--success-subtle);
  --danger-bg:       var(--danger-subtle);
  --warning-bg:      var(--warning-subtle);
  --info-bg:         var(--info-subtle);
}

[data-theme="dark"] {
  color-scheme: dark;

  --bg-base:        #1c1c1e;
  --bg-page:        #000000;
  --bg-subtle:      #232325;
  --bg-muted:       #2c2c2e;
  --bg-overlay:     rgba(0, 0, 0, 0.55);

  --border:         #38383a;
  --border-strong:  #48484a;

  --text-1:         #f5f5f7;
  --text-2:         #d1d1d6;
  --text-3:         #8e8e93;
  --text-4:         #5a5a5e;
  --text-inverse:   #0d0d0f;

  --accent:         #0a84ff;
  --accent-hover:   #3396ff;
  --accent-active:  #5aabff;
  --accent-subtle:  rgba(10, 132, 255, 0.16);
  --accent-border:  rgba(10, 132, 255, 0.32);
  --accent-text:    #409cff;

  --success:        #30d158;
  --success-subtle: rgba(48, 209, 88, 0.14);
  --success-border: rgba(48, 209, 88, 0.30);
  --success-text:   #4ade80;

  --danger:         #ff453a;
  --danger-subtle:  rgba(255, 69, 58, 0.14);
  --danger-border:  rgba(255, 69, 58, 0.30);
  --danger-text:    #ff8078;

  --warning:        #ff9f0a;
  --warning-subtle: rgba(255, 159, 10, 0.14);
  --warning-border: rgba(255, 159, 10, 0.30);
  --warning-text:   #ffb340;

  --info:           #64d2ff;
  --info-subtle:    rgba(100, 210, 255, 0.14);
  --info-border:    rgba(100, 210, 255, 0.30);
  --info-text:      #7dd3fc;

  --shadow-xs: 0 1px 2px rgba(0,0,0,.35);
  --shadow-sm: 0 2px 8px rgba(0,0,0,.4), 0 1px 3px rgba(0,0,0,.3);
  --shadow-md: 0 6px 20px rgba(0,0,0,.45), 0 2px 6px rgba(0,0,0,.3);
  --shadow-lg: 0 14px 34px rgba(0,0,0,.55), 0 4px 10px rgba(0,0,0,.35);
  --shadow-xl: 0 24px 56px rgba(0,0,0,.65), 0 8px 16px rgba(0,0,0,.4);
  --shadow-accent: 0 8px 22px rgba(10, 132, 255, 0.32);

  --glass-blur:         30px;
  --glass-saturate:     1.9;
  --glass-bg:           rgba(24, 24, 27, 0.80);
  --glass-bg-subtle:    rgba(28, 28, 30, 0.74);
  --glass-border:       rgba(255, 255, 255, 0.09);
  --glass-border-outer: rgba(255, 255, 255, 0.05);
  --glass-highlight:    rgba(255, 255, 255, 0.06);
  --glass-shadow:       0 12px 40px rgba(0, 0, 0, 0.55),
                        0 3px 10px  rgba(0, 0, 0, 0.4),
                        inset 0 1px 0 rgba(255, 255, 255, 0.06);
  --glass-shadow-sm:    0 3px 14px rgba(0, 0, 0, 0.45),
                        0 1px 4px  rgba(0, 0, 0, 0.32),
                        inset 0 1px 0 rgba(255, 255, 255, 0.05);
  --glass-shadow-xl:    0 26px 70px rgba(0, 0, 0, 0.65),
                        0 10px 24px  rgba(0, 0, 0, 0.48),
                        inset 0 1px 0 rgba(255, 255, 255, 0.06);

  --brand:           var(--accent);
  --brand-hover:     var(--accent-hover);
  --brand-active:    var(--accent-active);
  --brand-bg:        var(--accent-subtle);
  --brand-border:    var(--accent-border);
  --brand-text:      var(--accent-text);
  --text-primary:    var(--text-1);
  --text-secondary:  var(--text-2);
  --text-tertiary:   var(--text-3);
  --text-disabled:   var(--text-4);
  --text-accent:     var(--accent-text);
  --c-text:          var(--text-1);
  --c-text-2:        var(--text-2);
  --c-text-3:        var(--text-3);
  --c-text-4:        var(--text-4);
  --c-brand:         var(--accent);
  --c-brand-light:   var(--accent-subtle);
  --c-brand-text:    var(--accent-text);
  --c-brand-border:  var(--accent-border);
  --c-surface:       var(--bg-base);
  --c-surface-2:     var(--bg-subtle);
  --c-border:        var(--border);
  --c-border-3:      var(--border-strong);
  --page-bg:         var(--bg-page);
  --surface:         var(--bg-base);
  --ink-900:         var(--text-1);
  --ink-800:         var(--text-2);
  --ink-700:         var(--text-2);
  --ink-600:         var(--text-3);
  --ink-400:         var(--text-4);
  --ink-300:         var(--text-4);
  --ink-200:         var(--border);
  --ink-100:         var(--bg-subtle);
  --success-bg:      var(--success-subtle);
  --danger-bg:       var(--danger-subtle);
  --warning-bg:      var(--warning-subtle);
  --info-bg:         var(--info-subtle);
  --info-text:       var(--info-text);
  --surface-muted:   var(--bg-muted);
  --surface-subtle:  var(--bg-subtle);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --glass-blur:    0px;
    --glass-bg:      var(--bg-base);
    --glass-bg-subtle: var(--bg-subtle);
    --glass-shadow:  var(--shadow-md);
    --glass-shadow-sm: var(--shadow-sm);
    --glass-shadow-xl: var(--shadow-xl);
    --t-question: 0ms;
    --t-ripple:   0ms;
  }
  [data-theme="dark"] {
    --glass-blur:    0px;
    --glass-bg:      var(--bg-base);
    --glass-bg-subtle: var(--bg-subtle);
    --glass-shadow:  var(--shadow-md);
    --glass-shadow-sm: var(--shadow-sm);
    --glass-shadow-xl: var(--shadow-xl);
  }
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

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

html {
  font-size: 15px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: var(--font);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text-1);
  background: var(--bg-page);
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

*, button, input, select, textarea { font-family: var(--font); }

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: var(--r-full); }
::-webkit-scrollbar-thumb:hover { background: var(--text-4); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--r-sm); }
*:focus:not(:focus-visible) { outline: none; }

/* ── Three.js background canvas ── */
#vtx-bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
}
#vtx-bg-canvas.is-visible { opacity: 1; }

/* ── App layout ── */
#app {
  min-height: 100dvh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: var(--sp-6) var(--sp-4);
  padding-top: calc(var(--sp-6) + env(safe-area-inset-top, 0px));
  padding-bottom: calc(var(--sp-4) + env(safe-area-inset-bottom, 0px));
  padding-left: calc(var(--sp-4) + env(safe-area-inset-left, 0px));
  padding-right: calc(var(--sp-4) + env(safe-area-inset-right, 0px));
  overflow-x: hidden;
  position: relative;
  z-index: 1;
}

#app > div {
  min-width: 0;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

/* Auth layout: constrain to card width on desktop */
#app > div.cbt-layout--auth {
  max-width: 420px;
}

#app.exam-active {
  display: block;
  padding: var(--sp-3);
}

/* ═══════════════════════════════════════════════════════════
   LIQUID GLASS SURFACE SYSTEM
   Used sparingly — only the outer container, modals, header.
═══════════════════════════════════════════════════════════ */
.glass {
  background: var(--glass-bg) !important;
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) !important;
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) !important;
  border: 1px solid var(--glass-border-outer) !important;
  border-radius: var(--r-xl) !important;
  box-shadow: var(--glass-shadow) !important;
  position: relative;
}

.glass::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid var(--glass-border);
  pointer-events: none;
  z-index: 0;
}

.glass > * { position: relative; z-index: 1; }

.glass-dark {
  background: var(--glass-bg-subtle) !important;
  backdrop-filter: blur(calc(var(--glass-blur) * 0.75)) saturate(var(--glass-saturate)) !important;
  -webkit-backdrop-filter: blur(calc(var(--glass-blur) * 0.75)) saturate(var(--glass-saturate)) !important;
  border: 1px solid var(--glass-border-outer) !important;
  border-radius: var(--r-lg) !important;
  box-shadow: var(--glass-shadow-sm) !important;
  position: relative;
}

.glass-dark::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid var(--glass-border);
  pointer-events: none;
  z-index: 0;
}

.glass-dark > * { position: relative; z-index: 1; }

.glass.p-10, .glass.p-8 { padding: var(--sp-6) !important; }
.glass.p-6               { padding: var(--sp-5) !important; }
.glass-dark.p-8          { padding: var(--sp-5) !important; }
.glass-dark.p-6          { padding: var(--sp-4) !important; }
.glass.mt-10             { margin-top: var(--sp-5) !important; }
.glass-dark.mt-10        { margin-top: var(--sp-5) !important; }

/* glass ::before must never intercept clicks on nested interactive elements */
.glass::before,
.glass-dark::before {
  pointer-events: none !important;
}

/* subject pills must always be clickable above glass layering */
.vtx-subject-pill {
  position: relative;
  z-index: 2;
}

/* ── Auth layout ── */
.cbt-layout--auth {
  width: 100%;
  max-width: 420px;
  margin: auto;
}

.cbt-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border-outer);
  border-radius: var(--r-xl);
  padding: var(--sp-6);
  box-shadow: var(--glass-shadow);
  color: var(--text-1);
  position: relative;
}

.cbt-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid var(--glass-border);
  pointer-events: none;
}

/* ── Typography ── */
.cbt-title        { font-size: var(--text-2xl); font-weight: 600; color: var(--text-1); letter-spacing: -0.025em; line-height: 1.2; }
.cbt-heading      { font-size: var(--text-xl); font-weight: 600; color: var(--text-1); letter-spacing: -0.02em; }
.cbt-brand-title  { font-size: var(--text-xl); font-weight: 700; color: var(--text-1); letter-spacing: -0.025em; }
.cbt-brand-subtitle { font-size: var(--text-xs); color: var(--text-3); margin-top: 0.2rem; letter-spacing: 0.01em; }
.cbt-label        { font-size: var(--text-xs); font-weight: 500; color: var(--text-3); display: block; margin-bottom: var(--sp-1); letter-spacing: 0.02em; }
.cbt-meta         { font-size: var(--text-xs); color: var(--text-3); line-height: 1.5; }

.text-xs    { font-size: var(--text-xs)   !important; }
.text-sm    { font-size: var(--text-sm)   !important; }
.text-base  { font-size: var(--text-base) !important; }
.text-lg    { font-size: var(--text-md)   !important; }
.text-xl    { font-size: var(--text-lg)   !important; }
.text-2xl   { font-size: var(--text-xl)   !important; }
.text-3xl   { font-size: var(--text-xl)   !important; }
.text-4xl   { font-size: var(--text-2xl)  !important; }
.text-5xl   { font-size: var(--text-2xl)  !important; }
.text-7xl   { font-size: var(--text-3xl)  !important; }

@media (min-width: 768px) {
  .md\:text-3xl { font-size: var(--text-xl)  !important; }
  .md\:text-5xl { font-size: var(--text-2xl) !important; }
}

/* ── Form elements ── */
.cbt-input,
input[type="text"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="number"],
select,
textarea {
  font-family: var(--font) !important;
  font-size: var(--text-sm) !important;
  font-weight: 400;
  color: var(--text-1) !important;
  background: var(--bg-base) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--r-md) !important;
  padding: 0.5625rem 0.75rem !important;
  width: 100% !important;
  line-height: 1.5;
  transition: border-color var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease),
              transform var(--t-fast) var(--ease) !important;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="date"]:focus,
input[type="number"]:focus,
select:focus,
textarea:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px var(--accent-subtle) !important;
  transform: translateY(-1px) !important;
}

input::placeholder, textarea::placeholder { color: var(--text-4); font-weight: 400; }
textarea { resize: vertical; min-height: 5rem; }

/* Input focus label lift animation */
.cbt-field {
  position: relative;
}
.cbt-field-label {
  position: absolute;
  left: 0.75rem;
  top: 0.5625rem;
  font-size: var(--text-sm);
  color: var(--text-4);
  pointer-events: none;
  transition: all var(--t-base) var(--ease);
  transform-origin: left top;
  z-index: 1;
}
.cbt-field input:focus ~ .cbt-field-label,
.cbt-field input:not(:placeholder-shown) ~ .cbt-field-label {
  transform: scale(0.75) translateY(-1.6rem);
  color: var(--accent);
}

.cbt-password-wrap { position: relative; display: flex; align-items: center; }
.cbt-password-wrap input { padding-right: 2.75rem !important; }

.cbt-eye-btn {
  position: absolute;
  right: 0.625rem;
  top: 50%;
  transform: translateY(-50%);
  width: 28px; height: 28px;
  background: none; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-4);
  border-radius: var(--r-sm);
  transition: color var(--t-fast);
}
.cbt-eye-btn:hover { color: var(--accent); }

/* ── Button system ── */
.btn {
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  gap: var(--sp-2) !important;
  font-family: var(--font) !important;
  font-weight: 500 !important;
  font-size: var(--text-sm) !important;
  letter-spacing: 0.01em !important;
  padding: 0 0.875rem !important;
  height: 34px !important;
  border-radius: var(--r-md) !important;
  border: 1px solid transparent !important;
  cursor: pointer !important;
  white-space: nowrap !important;
  user-select: none !important;
  -webkit-tap-highlight-color: transparent !important;
  transition:
    background var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease),
    box-shadow var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease),
    opacity var(--t-fast) var(--ease) !important;
  text-decoration: none !important;
  position: relative !important;
  overflow: hidden !important;
  background: var(--accent) !important;
  color: var(--text-inverse) !important;
  box-shadow: var(--shadow-xs) !important;
  line-height: 1 !important;
}

.btn:hover:not(:disabled) {
  background: var(--accent-hover) !important;
  box-shadow: var(--shadow-accent) !important;
  transform: translateY(-1px) !important;
}

.btn:active:not(:disabled) {
  transform: translateY(0) !important;
  box-shadow: var(--shadow-xs) !important;
}

.btn:disabled {
  opacity: 0.4 !important;
  cursor: not-allowed !important;
  pointer-events: none !important;
}

/* Ripple element — injected by JS */
.btn-ripple {
  position: absolute !important;
  border-radius: 50% !important;
  background: rgba(255, 255, 255, 0.35) !important;
  transform: scale(0) !important;
  animation: vtx-ripple var(--t-ripple) linear !important;
  pointer-events: none !important;
}

@keyframes vtx-ripple {
  to { transform: scale(4); opacity: 0; }
}

/* Colour variants */
.btn.bg-green-600, .btn[class*="bg-green"] { background: var(--success) !important; }
.btn.bg-green-600:hover:not(:disabled), .btn[class*="bg-green"]:hover:not(:disabled) {
  background: var(--success-text) !important;
  box-shadow: 0 4px 12px rgba(26,158,82,.28) !important;
}
.btn.bg-red-600, .btn[class*="bg-red"] { background: var(--danger) !important; }
.btn.bg-red-600:hover:not(:disabled), .btn[class*="bg-red"]:hover:not(:disabled) {
  background: var(--danger-text) !important;
  box-shadow: 0 4px 12px rgba(224,59,59,.28) !important;
}
.btn.bg-gray-500, .btn[class*="bg-gray"] {
  background: var(--bg-subtle) !important;
  color: var(--text-2) !important;
  border-color: var(--border) !important;
  box-shadow: var(--shadow-xs) !important;
}
.btn.bg-gray-500:hover:not(:disabled), .btn[class*="bg-gray"]:hover:not(:disabled) {
  background: var(--bg-muted) !important;
  box-shadow: none !important;
  transform: none !important;
}
.btn.bg-gray-500 .btn-ripple, .btn[class*="bg-gray"] .btn-ripple {
  background: rgba(0,0,0,0.08) !important;
}
.btn.bg-blue-600, .btn[class*="bg-blue"] { background: var(--info) !important; }
.btn.bg-blue-600:hover:not(:disabled), .btn[class*="bg-blue"]:hover:not(:disabled) { background: var(--info-text) !important; }
.btn.bg-indigo-600, .btn[class*="bg-indigo"] { background: var(--accent) !important; }
.btn.bg-indigo-600:hover:not(:disabled), .btn[class*="bg-indigo"]:hover:not(:disabled) { background: var(--accent-hover) !important; }

.btn.w-full  { width: 100% !important; }
.btn.max-w-xs { max-width: 240px !important; }

.btn.btn-lg, .btn[class*="py-3"] {
  height: 40px !important;
  padding: 0 1.25rem !important;
  font-size: var(--text-base) !important;
  font-weight: 600 !important;
}

.btn.text-xl, .btn.text-2xl,
.btn[class*="py-5"], .btn[class*="py-4"] {
  font-size: var(--text-sm) !important;
  padding: 0 1rem !important;
  height: 34px !important;
}

.btn[class*="px-16"], .btn[class*="px-10"], .btn[class*="px-8"] {
  padding-left: 1rem !important;
  padding-right: 1rem !important;
}

.btn.btn-loading {
  opacity: 0.7 !important;
  pointer-events: none !important;
  padding-right: 2.5rem !important;
}

.btn.btn-loading::after {
  content: '' !important;
  position: absolute !important;
  right: 0.75rem !important;
  top: 50% !important;
  width: 0.8rem !important;
  height: 0.8rem !important;
  margin-top: -0.4rem !important;
  border: 1.5px solid rgba(255,255,255,.3) !important;
  border-top-color: rgba(255,255,255,.9) !important;
  border-radius: 50% !important;
  animation: cbt-spin 0.6s linear infinite !important;
}

.btn[class*="bg-gray"].btn-loading::after {
  border-color: var(--border) !important;
  border-top-color: var(--text-3) !important;
}

/* cbt-btn */
.cbt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  font-family: var(--font);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 0 0.875rem;
  height: 34px;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  overflow: hidden;
  position: relative;
  transition: background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
  text-decoration: none;
}

.cbt-btn--primary { background: var(--accent); color: var(--text-inverse); }
.cbt-btn--success { background: var(--success); color: var(--text-inverse); }
.cbt-btn--danger  { background: var(--danger); color: var(--text-inverse); }
.cbt-btn--ghost   { background: var(--bg-subtle); color: var(--text-2); border-color: var(--border); }
.cbt-btn--info    { background: var(--info); color: var(--text-inverse); }

.cbt-btn:hover:not(:disabled) { transform: translateY(-1px); filter: brightness(0.93); box-shadow: var(--shadow-sm); }
.cbt-btn--full { width: 100%; justify-content: center; }
.cbt-btn--lg   { height: 40px; padding: 0 1.25rem; font-size: var(--text-base); font-weight: 600; }

/* ── Badges ── */
.cbt-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  font-size: 0.625rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--r-sm);
  white-space: nowrap;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.cbt-badge--success { background: var(--success-subtle); color: var(--success-text); border: 1px solid var(--success-border); }
.cbt-badge--brand, .cbt-badge--warning { background: var(--warning-subtle); color: var(--warning-text); border: 1px solid var(--warning-border); }
.cbt-badge--danger  { background: var(--danger-subtle);  color: var(--danger-text);  border: 1px solid var(--danger-border); }
.cbt-badge--neutral { background: var(--bg-subtle);      color: var(--text-3);       border: 1px solid var(--border); }

/* ════════════════════════════════════════════════════════
   SUBJECT SELECTION — pill chip system (replaces cards)
════════════════════════════════════════════════════════ */
.vtx-subject-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.vtx-subject-pill {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: var(--r-full);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  border: 1.5px solid var(--border);
  background: var(--bg-base);
  color: var(--text-2);
  transition:
    border-color var(--t-base) var(--ease),
    background var(--t-base) var(--ease),
    color var(--t-base) var(--ease),
    transform var(--t-base) var(--ease),
    box-shadow var(--t-base) var(--ease);
  overflow: hidden;
}

.vtx-subject-pill input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

.vtx-subject-pill-check {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: transparent;
  transition: all var(--t-base) var(--ease);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vtx-subject-pill:hover {
  border-color: var(--accent-border);
  color: var(--accent-text);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.vtx-subject-pill.is-selected {
  border-color: var(--accent);
  background: var(--accent-subtle);
  color: var(--accent-text);
  font-weight: 600;
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.vtx-subject-pill.is-selected .vtx-subject-pill-check {
  background: var(--accent);
  border-color: var(--accent);
}

.vtx-subject-pill.is-required {
  border-color: var(--success-border);
  background: var(--success-subtle);
  color: var(--success-text);
  cursor: default;
}

.vtx-subject-pill.is-required .vtx-subject-pill-check {
  background: var(--success);
  border-color: var(--success);
}

/* Check mark SVG inside pill */
.vtx-subject-pill-check::after {
  content: '';
  width: 6px;
  height: 6px;
  border-right: 1.5px solid white;
  border-bottom: 1.5px solid white;
  transform: rotate(45deg) translate(-1px, -1px) scale(0);
  transition: transform var(--t-base) var(--ease);
}

.vtx-subject-pill.is-selected .vtx-subject-pill-check::after,
.vtx-subject-pill.is-required .vtx-subject-pill-check::after {
  transform: rotate(45deg) translate(-1px, -1px) scale(1);
}

/* ── MCQ Options — flat, animated ── */
.option-label, .cbt-option {
  display: flex !important;
  align-items: flex-start !important;
  gap: var(--sp-3) !important;
  padding: 0.75rem 1rem !important;
  border-radius: var(--r-lg) !important;
  cursor: pointer !important;
  background: var(--bg-base) !important;
  border: 1.5px solid var(--border) !important;
  transition:
    border-color var(--t-base) var(--ease),
    background var(--t-base) var(--ease),
    transform var(--t-base) var(--ease),
    box-shadow var(--t-base) var(--ease) !important;
  min-height: 44px !important;
  user-select: none !important;
  -webkit-tap-highlight-color: transparent !important;
  position: relative !important;
  font-size: var(--text-base) !important;
  box-shadow: none !important;
  color: var(--text-1) !important;
}

/* Left accent bar */
.option-label::before, .cbt-option::before {
  content: '' !important;
  position: absolute !important;
  left: 0 !important; top: 4px !important; bottom: 4px !important;
  width: 3px !important;
  background: transparent !important;
  border-radius: 0 2px 2px 0 !important;
  transition: background var(--t-base) var(--ease) !important;
}

.option-label:hover, .cbt-option:hover {
  border-color: var(--accent-border) !important;
  background: var(--accent-subtle) !important;
  transform: translateX(2px) !important;
}
.option-label:hover::before, .cbt-option:hover::before { background: var(--accent) !important; }

.option-label.is-selected, .cbt-option.is-selected,
.option-label[style*="edf2ff"], .option-label[style*="3b5bdb"] {
  background: var(--accent-subtle) !important;
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px var(--accent-subtle) !important;
  transform: translateX(4px) !important;
}
.option-label.is-selected::before, .cbt-option.is-selected::before { background: var(--accent) !important; }

.option-label input[type="radio"] {
  width: 1rem !important; height: 1rem !important; min-width: 1rem !important;
  accent-color: var(--accent) !important;
  margin-top: 0.2rem !important;
  cursor: pointer !important;
  flex-shrink: 0 !important;
}

.subject-checkbox { width: 1rem !important; height: 1rem !important; accent-color: var(--accent) !important; cursor: pointer !important; }

/* Legacy subject label glass style — keep for backward compat but override with pill styles */
label.glass[class*="cursor-pointer"] {
  transition: transform var(--t-base) var(--ease), border-color var(--t-base) var(--ease), background var(--t-base) var(--ease) !important;
  border: 1px solid var(--glass-border-outer) !important;
  padding: 0.875rem 1rem !important;
}
label.glass[class*="cursor-pointer"]:hover { transform: translateY(-2px) !important; border-color: var(--accent) !important; box-shadow: var(--glass-shadow) !important; }
label.glass:has(.subject-checkbox:checked) {
  border-color: var(--accent) !important;
  background: var(--accent-subtle) !important;
  box-shadow: 0 0 0 3px var(--accent-subtle), var(--glass-shadow-sm) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  background: color-mix(in srgb, var(--accent-subtle) 80%, transparent) !important;
}

/* ── Question transition ── */
.vtx-question-wrap {
  animation: vtx-question-enter var(--t-question) var(--ease) both;
}

@keyframes vtx-question-enter {
  from { opacity: 0; transform: translateX(12px); }
  to   { opacity: 1; transform: translateX(0); }
}

.vtx-question-wrap.is-leaving {
  animation: vtx-question-leave var(--t-question) var(--ease-in) both;
}

@keyframes vtx-question-leave {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(-12px); }
}

/* ── Timer ring ── */
.vtx-timer-wrap {
  position: relative;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.vtx-timer-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
  pointer-events: none;
}

.vtx-timer-ring-track {
  fill: none;
  stroke: var(--border);
  stroke-width: 3;
}

.vtx-timer-ring-prog {
  fill: none;
  stroke: var(--success);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s linear, stroke var(--t-slow) var(--ease);
}

.vtx-timer-ring-prog.is-yellow { stroke: var(--warning); }
.vtx-timer-ring-prog.is-red    { stroke: var(--danger); }

/* Timer text sits centred inside the ring */
.vtx-timer-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.vtx-timer-ring-prog.is-yellow { stroke: var(--warning); }
.vtx-timer-ring-prog.is-red    { stroke: var(--danger); }

/* ── Question Navigator — flat dots ── */
.nav-btn, .cbt-nav-dot {
  width: 1.875rem !important;
  height: 1.875rem !important;
  border-radius: var(--r-md) !important;
  border: 1.5px solid var(--border) !important;
  background: var(--bg-base) !important;
  color: var(--text-3) !important;
  font-family: var(--font-mono) !important;
  font-weight: 500 !important;
  font-size: 0.625rem !important;
  cursor: pointer !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  transition:
    background var(--t-base) var(--ease),
    border-color var(--t-base) var(--ease),
    transform var(--t-base) var(--ease),
    color var(--t-base) var(--ease) !important;
  padding: 0 !important;
  line-height: 1 !important;
  box-shadow: none !important;
  position: relative !important;
  overflow: hidden !important;
}

.nav-btn:hover, .cbt-nav-dot:hover {
  background: var(--accent-subtle) !important;
  border-color: var(--accent-border) !important;
  color: var(--accent-text) !important;
  transform: scale(1.1) !important;
}

.nav-btn.answered, .cbt-nav-dot.is-answered {
  background: var(--success) !important;
  border-color: transparent !important;
  color: var(--text-inverse) !important;
  animation: vtx-nav-pop var(--t-slow) var(--ease) !important;
}

@keyframes vtx-nav-pop {
  0%   { transform: scale(1); }
  50%  { transform: scale(1.25); }
  100% { transform: scale(1); }
}

.nav-btn.current, .cbt-nav-dot.is-current {
  background: var(--accent) !important;
  border-color: var(--accent) !important;
  color: var(--text-inverse) !important;
  transform: scale(1.12) !important;
  box-shadow: var(--shadow-accent) !important;
}

.nav-btn.current.answered, .cbt-nav-dot.is-current.is-answered {
  background: var(--accent) !important;
  border: 2px solid var(--success) !important;
  color: var(--text-inverse) !important;
  transform: scale(1.12) !important;
}

/* ── Timer ── */
#timerDisplay, .cbt-timer {
  font-family: var(--font-mono) !important;
  font-size: var(--text-timer) !important;
  font-weight: 500 !important;
  letter-spacing: 0.04em !important;
  line-height: 1 !important;
  display: block !important;
  min-width: 7ch !important;
  transition: color var(--t-slow) var(--ease) !important;
}

.timer-green, .cbt-timer--green { color: var(--success) !important; }
.timer-yellow, .cbt-timer--yellow { color: var(--warning) !important; }
.timer-red, .cbt-timer--red {
  color: var(--danger) !important;
  animation: cbt-pulse 0.9s ease-in-out infinite !important;
}

/* ── Exam header ── */
.exam-header-sticky, .cbt-exam-header {
  position: sticky !important;
  top: 0.5rem !important;
  z-index: 40 !important;
  transition: box-shadow var(--t-base) var(--ease) !important;
}

.exam-header-sticky.stuck, .cbt-exam-header.is-stuck {
  box-shadow: var(--glass-shadow) !important;
}

/* ── Exam layout — reduced card usage ── */
/* The student info bar: flat strip, no glass card */
.vtx-student-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.75rem;
  padding: 0.4375rem 0;
  font-size: var(--text-sm);
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.5rem;
}

.vtx-student-bar span { color: var(--text-2); font-weight: 500; }

/* Subject switch strip — flat pill tabs, no glass wrapper */
.vtx-subj-strip {
  display: flex;
  gap: 0.375rem;
  flex-wrap: wrap;
  justify-content: center;
  padding: 0.625rem 0;
}

.vtx-subj-tab {
  padding: 0.3125rem 0.875rem;
  border-radius: var(--r-full);
  font-size: var(--text-sm);
  font-weight: 500;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text-3);
  cursor: pointer;
  transition:
    background var(--t-fast),
    color var(--t-fast),
    border-color var(--t-fast),
    transform var(--t-fast);
  -webkit-tap-highlight-color: transparent;
}

.vtx-subj-tab:hover {
  background: var(--accent-subtle);
  border-color: var(--accent-border);
  color: var(--accent-text);
}

.vtx-subj-tab.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--text-inverse);
  transform: none;
}

/* Navigator section — no card wrapper, just a label + dot grid */
.vtx-nav-section {
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
}

.vtx-nav-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-4);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: 0.5rem;
}

/* Question section — single container, no nested glass */
.vtx-question-section {
  padding: 1.25rem 0;
  border-top: 1px solid var(--border);
}

/* ── Tab strip ── */
.cbt-tab-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-4);
  background: var(--glass-bg);
  backdrop-filter: blur(calc(var(--glass-blur) * 0.6)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(calc(var(--glass-blur) * 0.6)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border-outer);
  border-radius: var(--r-lg);
  box-shadow: var(--glass-shadow-sm);
  position: relative;
}
.cbt-tab-strip::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid var(--glass-border);
  pointer-events: none;
}
.cbt-tab {
  padding: 0.3125rem 0.75rem;
  border-radius: var(--r-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
  color: var(--text-2);
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast);
  -webkit-tap-highlight-color: transparent;
  position: relative;
  z-index: 1;
}
.cbt-tab:hover { background: var(--accent-subtle); border-color: var(--accent-border); color: var(--accent-text); }
.cbt-tab.is-active { background: var(--accent); border-color: var(--accent); color: var(--text-inverse); }

/* ── Modals ── */
.cbt-overlay, .modal-overlay {
  position: fixed !important;
  inset: 0 !important;
  background: var(--bg-overlay) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  z-index: 999 !important;
  padding: var(--sp-4) !important;
  backdrop-filter: blur(10px) !important;
  -webkit-backdrop-filter: blur(10px) !important;
  animation: cbt-overlay-in var(--t-base) ease-out both !important;
  overflow-y: auto !important;
}

.cbt-modal, .modal-box {
  background: var(--glass-bg) !important;
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) !important;
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) !important;
  border: 1px solid var(--glass-border-outer) !important;
  border-radius: var(--r-xl) !important;
  padding: var(--sp-6) !important;
  max-width: 400px;
  width: 100%;
  box-shadow: var(--glass-shadow-xl) !important;
  animation: cbt-modal-in var(--t-slow) cubic-bezier(.34,1.45,.64,1) both !important;
  margin: auto;
  color: var(--text-1) !important;
  position: relative;
}

.cbt-modal::before, .modal-box::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid var(--glass-border);
  pointer-events: none;
  z-index: 0;
}
.cbt-modal > *, .modal-box > * { position: relative; z-index: 1; }

.modal-box h2, .modal-box h3 { font-size: var(--text-lg) !important; font-weight: 600 !important; color: var(--text-1) !important; }

#uiConfirmModal p, #uiConfirmModal [id="uiConfirmTitle"] { color: var(--text-1) !important; }
#uiConfirmOk { background: var(--danger) !important; color: var(--text-inverse) !important; }
#uiConfirmOk:hover { background: var(--danger-text) !important; }
#uiConfirmCancel { background: var(--bg-subtle) !important; color: var(--text-2) !important; border-color: var(--border) !important; }
#uiConfirmCancel:hover { background: var(--bg-muted) !important; }

/* ── Toasts ── */
#toastContainer {
  position: fixed;
  top: var(--sp-4);
  right: var(--sp-4);
  z-index: 9000;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  max-width: 320px;
  width: calc(100vw - 2rem);
  pointer-events: none;
}

.cbt-toast {
  pointer-events: auto;
  display: flex;
  align-items: flex-start;
  gap: var(--sp-2);
  padding: 0.75rem 1rem;
  border-radius: var(--r-lg);
  font-size: var(--text-sm);
  font-weight: 400;
  line-height: 1.5;
  box-shadow: var(--glass-shadow);
  animation: cbt-toast-in var(--t-slow) cubic-bezier(.22,1,.36,1) both;
  border: 1px solid var(--glass-border-outer);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border-left: 3px solid var(--border);
  color: var(--text-1);
  position: relative;
}

.cbt-toast::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid var(--glass-border);
  pointer-events: none;
  border-left: none;
}

.cbt-toast .cbt-toast-icon {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  margin-top: 1px;
}

.cbt-toast.is-dismissing { animation: cbt-toast-out var(--t-base) ease-in both; }

.cbt-toast--success { border-left-color: var(--success); }
.cbt-toast--error   { border-left-color: var(--danger);  }
.cbt-toast--info    { border-left-color: var(--accent);  }
.cbt-toast--warning { border-left-color: var(--warning); }

.cbt-toast__dismiss {
  margin-left: auto;
  flex-shrink: 0;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-4);
  opacity: 0.6;
  font-size: 1rem;
  line-height: 1;
  padding: 0;
}
.cbt-toast__dismiss:hover { opacity: 1; }

/* ── Results — count-up score ── */
.vtx-score-display {
  font-size: 4rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  transition: color var(--t-slow) var(--ease);
}

.vtx-grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  font-size: 1.125rem;
  font-weight: 800;
  margin-left: 0.5rem;
  vertical-align: middle;
  animation: vtx-grade-pop 0.5s cubic-bezier(0.34,1.56,0.64,1) 0.5s both;
}

@keyframes vtx-grade-pop {
  from { transform: scale(0) rotate(-20deg); opacity: 0; }
  to   { transform: scale(1) rotate(0deg); opacity: 1; }
}

/* ── Teacher dashboard ── */
.max-w-7xl.glass { border-top: 2px solid var(--accent) !important; padding: 0 !important; }

.tab-btn {
  background: transparent !important;
  color: var(--text-3) !important;
  border: 1px solid transparent !important;
  border-radius: var(--r-sm) !important;
  font-size: var(--text-sm) !important;
  font-weight: 500 !important;
  padding: 0.375rem 0.75rem !important;
  height: auto !important;
  box-shadow: none !important;
  overflow: visible !important;
  transition: color var(--t-fast), background var(--t-fast), border-color var(--t-fast) !important;
}

.tab-btn:hover:not(:disabled) {
  color: var(--text-1) !important;
  background: var(--bg-subtle) !important;
  border-color: var(--border) !important;
  transform: none !important;
  box-shadow: none !important;
}

.tab-btn.active {
  background: var(--accent) !important;
  color: var(--text-inverse) !important;
  border-color: var(--accent) !important;
  font-weight: 600 !important;
}

#tab-chat.tab-btn, .tab-btn.bg-green-600 {
  background: var(--success) !important;
  color: var(--text-inverse) !important;
  border-color: var(--success) !important;
  font-weight: 600 !important;
}
#tab-chat.tab-btn:hover:not(:disabled), .tab-btn.bg-green-600:hover:not(:disabled) {
  background: var(--success-text) !important;
  transform: none !important;
}
#tab-dm.tab-btn, .tab-btn.bg-indigo-600 {
  background: var(--accent) !important;
  color: var(--text-inverse) !important;
  border-color: var(--accent) !important;
  font-weight: 600 !important;
}
#tab-dm.tab-btn:hover:not(:disabled) { background: var(--accent-hover) !important; transform: none !important; }

.teacher-tab         { display: block; animation: cbt-fade-in var(--t-slow) ease-out both; }
.teacher-tab.hidden  { display: none !important; }

.teacher-tab details summary,
details.glass-dark > summary,
.space-y-6 details > summary {
  list-style: none !important;
  cursor: pointer !important;
  user-select: none !important;
  padding: 0.75rem 1rem !important;
  background: rgba(255,255,255,0.03) !important;
  font-size: var(--text-base) !important;
  font-weight: 500 !important;
  color: var(--text-1) !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  border-bottom: 1px solid transparent !important;
  border-radius: var(--r-lg) var(--r-lg) 0 0 !important;
  transition: background var(--t-fast) !important;
  position: relative;
  z-index: 1;
}

.teacher-tab details[open] summary,
details.glass-dark[open] > summary,
.space-y-6 details[open] > summary {
  background: var(--accent-subtle) !important;
  border-bottom-color: var(--accent-border) !important;
  color: var(--accent-text) !important;
}

.teacher-tab details summary::-webkit-details-marker,
details summary::-webkit-details-marker { display: none !important; }

.teacher-tab details summary::after,
details.glass-dark > summary::after,
.space-y-6 details > summary::after {
  content: '›' !important;
  font-size: 1.125rem !important;
  color: var(--text-4) !important;
  font-weight: 400 !important;
  transition: transform var(--t-base) !important;
  flex-shrink: 0 !important;
}

.teacher-tab details[open] summary::after,
details.glass-dark[open] > summary::after,
.space-y-6 details[open] > summary::after {
  transform: rotate(90deg) !important;
  color: var(--accent) !important;
}

.teacher-result-card {
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.teacher-result-card:hover { transform: translateY(-2px); box-shadow: var(--glass-shadow); border-color: var(--accent-border) !important; }

/* ── Chat ── */
#chatMessages {
  max-height: 380px !important;
  overflow-y: auto !important;
  overflow-x: hidden !important;
  scroll-behavior: smooth !important;
  display: flex !important;
  flex-direction: column !important;
  gap: var(--sp-2) !important;
  padding-right: var(--sp-1) !important;
  min-width: 0 !important;
  width: 100% !important;
  box-sizing: border-box !important;
}

#chatMessages p, #chatMessages span { word-break: break-word !important; overflow-wrap: break-word !important; }
#chatMessages::-webkit-scrollbar { width: 3px !important; }
#chatMessages::-webkit-scrollbar-thumb { background: var(--border-strong) !important; border-radius: 99px !important; }

#chatMessages .glass-dark[class*="border-yellow"] {
  background: var(--warning-subtle) !important;
  border-color: var(--warning-border) !important;
  border-left: 2px solid var(--warning) !important;
}

#typingIndicator { min-height: 1.1rem !important; font-size: var(--text-xs) !important; color: var(--text-4) !important; text-align: center !important; font-style: italic !important; }

#replyPreview {
  border-radius: var(--r-md) !important;
  background: var(--accent-subtle) !important;
  border: 1px solid var(--accent-border) !important;
  padding: 0.5rem 0.75rem !important;
  font-size: var(--text-sm) !important;
  align-items: center !important;
  gap: var(--sp-3) !important;
  width: 100% !important;
  min-width: 0 !important;
  overflow: hidden !important;
  box-sizing: border-box !important;
}

#replyPreview > div { flex: 1 1 0 !important; min-width: 0 !important; overflow: hidden !important; }
#replyPreview strong { font-size: var(--text-sm) !important; font-weight: 600 !important; display: block !important; white-space: nowrap !important; overflow: hidden !important; text-overflow: ellipsis !important; }
#replyPreview #replyText { display: block !important; font-size: var(--text-xs) !important; color: var(--text-3) !important; margin-top: 2px !important; white-space: nowrap !important; overflow: hidden !important; text-overflow: ellipsis !important; }

.border-l-4.border-purple-600.bg-purple-50 {
  background: var(--bg-subtle) !important;
  border-left: 2px solid var(--accent) !important;
  border-top: none !important;
  border-right: none !important;
  border-bottom: none !important;
  border-radius: 0 var(--r-md) var(--r-md) 0 !important;
  padding: 0.75rem 1rem !important;
}

#mentionDropdown {
  border-radius: var(--r-lg) !important;
  border: 1px solid var(--glass-border-outer) !important;
  background: var(--glass-bg) !important;
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) !important;
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) !important;
  box-shadow: var(--glass-shadow) !important;
}
.mention-item:last-child { border-bottom: none !important; }

/* ── Tasks panel ── */
#tasksContainer .glass-dark {
  background: var(--accent-subtle) !important;
  border: 1px solid var(--accent-border) !important;
  border-radius: var(--r-xl) !important;
  padding: var(--sp-5) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

#tasksContainer .text-5xl { font-size: var(--text-xl) !important; }
#tasksContainer .text-3xl { font-size: var(--text-lg) !important; }
#tasksContainer .border-red-300 { background: var(--danger-subtle) !important; border-color: var(--danger-border) !important; }

/* ── Colour overrides ── */
.text-purple-700   { color: var(--accent-text) !important; }
.text-purple-600   { color: var(--accent) !important; }
.border-purple-600 { border-color: var(--accent) !important; }
.bg-purple-50      { background: var(--accent-subtle) !important; }
.bg-purple-600     { background: var(--accent) !important; }
.border-purple-200 { border-color: var(--accent-border) !important; }
.border-purple-500\/50 { border-color: rgba(79,110,247,.25) !important; }
.bg-purple-600\/30     { background: rgba(79,110,247,.07) !important; }
.bg-purple-100 { background: var(--accent-subtle) !important; border: 1px solid var(--accent-border) !important; border-radius: var(--r-sm) !important; }
.bg-indigo-600 { background: var(--accent) !important; }
.accent-indigo-600 { accent-color: var(--accent) !important; }
.glass.rounded-lg[style*="var(--success"] { border-color: var(--success-border) !important; }
.glass.rounded-lg[style*="var(--danger"]  { border-color: var(--danger-border)  !important; }

/* Container sizes */
.max-w-4xl { max-width: 840px !important; }
.max-w-5xl { max-width: 960px !important; }
.max-w-7xl { max-width: 1080px !important; }

/* ── Notification badges ── */
.chat-notif-badge,
.dm-notif-badge,
.vtx-notif-badge {
  position: absolute !important;
  top: -7px !important;
  right: -7px !important;
  min-width: 20px !important;
  height: 20px !important;
  padding: 0 5px !important;
  border-radius: 10px !important;
  background: var(--danger) !important;
  color: #fff !important;
  font-size: 0.6875rem !important;
  font-weight: 700 !important;
  font-family: var(--font-mono) !important;
  line-height: 20px !important;
  text-align: center !important;
  white-space: nowrap !important;
  border: 2px solid var(--bg-page) !important;
  box-shadow: 0 1px 4px rgba(0,0,0,0.25) !important;
  pointer-events: none !important;
  z-index: 10 !important;
  display: none;
  animation: vtx-badge-pop 0.25s cubic-bezier(0.34,1.56,0.64,1) both !important;
}

.chat-notif-badge.is-visible,
.dm-notif-badge.is-visible,
.vtx-notif-badge.is-visible {
  display: block !important;
}

@keyframes vtx-badge-pop {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

/* ── Auth screen ── */
.cbt-auth-footer {
  font-size: var(--text-xs);
  color: var(--text-4);
  text-align: center;
  margin-top: var(--sp-6);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border);
}

.cbt-text-link {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent-border);
  background: none;
  border: none;
  cursor: pointer;
  font-size: inherit;
  font-family: inherit;
  font-weight: 500;
  padding: 0;
  transition: color var(--t-fast);
}
.cbt-text-link:hover { color: var(--accent-hover); }

/* ── Student info bar (legacy glass version, kept for compat) ── */
.cbt-student-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem 0.75rem;
  background: var(--glass-bg-subtle);
  backdrop-filter: blur(calc(var(--glass-blur) * 0.5)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(calc(var(--glass-blur) * 0.5)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border-outer);
  border-radius: var(--r-md);
  padding: 0.4375rem 0.875rem;
  font-size: var(--text-sm);
  color: var(--text-1);
  box-shadow: var(--glass-shadow-sm);
  position: relative;
}
.cbt-student-bar::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid var(--glass-border);
  pointer-events: none;
}

.cbt-score-card {
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.5rem 0.75rem;
  text-align: center;
  min-width: 88px;
  color: var(--text-1);
  transition: transform var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
}
.cbt-score-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }

/* ── Utilities ── */
.hidden { display: none !important; }
.animate-fadeIn, .cbt-animate-in { animation: cbt-fade-in var(--t-slow) var(--ease) both !important; }

/* ── Animations ── */
@keyframes cbt-spin       { to { transform: rotate(360deg); } }
@keyframes cbt-pulse      { 0%, 100% { opacity: 1; } 50% { opacity: 0.45; } }
@keyframes cbt-fade-in    { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
@keyframes cbt-overlay-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes cbt-modal-in   { from { opacity: 0; transform: scale(0.97) translateY(10px); } to { opacity: 1; transform: scale(1) translateY(0); } }
@keyframes cbt-toast-in   { from { opacity: 0; transform: translateX(105%); } to { opacity: 1; transform: translateX(0); } }
@keyframes cbt-toast-out  { from { opacity: 1; transform: translateX(0); } to { opacity: 0; transform: translateX(105%); } }

/* ── Typing dots ── */
.dm-typing-dots { display: inline-flex; align-items: center; gap: 3px; flex-shrink: 0; }
.dm-typing-dots span { display: inline-block; width: 5px; height: 5px; border-radius: 50%; background: var(--text-3); animation: dm-dot-bounce 1.2s ease-in-out infinite; }
.dm-typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.dm-typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes dm-dot-bounce { 0%,60%,100%{transform:translateY(0);opacity:0.4}30%{transform:translateY(-4px);opacity:1} }

/* ── News Ticker ── */
.vtx-ticker-wrap {
  width: 100%; max-width: 100%; box-sizing: border-box; overflow: hidden;
  background: linear-gradient(90deg, #b91c1c 0%, #dc2626 40%, #b91c1c 100%);
  border-radius: 8px; margin-bottom: 1.25rem;
  box-shadow: 0 2px 8px rgba(185, 28, 28, 0.22);
  display: flex; align-items: stretch; min-height: 40px;
  position: relative;
}
.vtx-ticker-label {
  flex-shrink: 0; background: rgba(0,0,0,0.22); color: #fff;
  font-size: 0.625rem; font-weight: 800; letter-spacing: 0.10em; text-transform: uppercase;
  padding: 0 0.625rem; display: flex; align-items: center; gap: 0.375rem;
  border-right: 1px solid rgba(255,255,255,0.18); white-space: nowrap; z-index: 2; user-select: none;
}
.vtx-ticker-label-icon { font-size: 0.9375rem; line-height: 1; }
.vtx-ticker-viewport {
  flex: 1 1 0%; min-width: 0; overflow: hidden; display: flex; align-items: center;
  position: relative;
  -webkit-mask-image: linear-gradient(to right,transparent 0%,#000 4%,#000 96%,transparent 100%);
  mask-image: linear-gradient(to right,transparent 0%,#000 4%,#000 96%,transparent 100%);
}
.vtx-ticker-track {
  display: inline-flex; align-items: center; white-space: nowrap;
  color: #fff; font-size: var(--text-sm); font-weight: 600; padding: 0 2rem;
  will-change: transform; flex-shrink: 0;
  transform: translateZ(0); -webkit-transform: translateZ(0);
  backface-visibility: hidden; -webkit-backface-visibility: hidden;
}
.vtx-ticker-track:hover { animation-play-state: paused; }
.vtx-ticker-sep { display: inline-block; margin: 0 1.25rem; opacity: 0.55; font-size: 0.625rem; vertical-align: middle; letter-spacing: 0.05em; }

@media (prefers-reduced-motion: reduce) {
  .vtx-ticker-wrap { flex-direction: column; min-height: unset; }
  .vtx-ticker-label { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.18); padding: 0.5rem 0.875rem; }
  .vtx-ticker-viewport { -webkit-mask-image: none; mask-image: none; overflow: visible; min-width: unset; }
  .vtx-ticker-track { animation: none !important; white-space: normal !important; flex-wrap: wrap; padding: 0.5rem 0.875rem; gap: 0.5rem; line-height: 1.6; }
  .vtx-ticker-clone { display: none !important; }
}

[data-theme="dark"] .vtx-ticker-wrap { background: linear-gradient(90deg,#991b1b 0%,#b91c1c 40%,#991b1b 100%); box-shadow: 0 2px 10px rgba(185,28,28,0.35); }
[data-theme="dark"] .vtx-ticker-label { background: rgba(0,0,0,0.32); }

/* ── Responsive ── */
@media (max-width: 640px) {
  #app {
    padding: var(--sp-3) !important;
    padding-top: calc(var(--sp-3) + env(safe-area-inset-top, 0px)) !important;
    padding-bottom: calc(var(--sp-3) + env(safe-area-inset-bottom, 0px)) !important;
    padding-left: calc(var(--sp-3) + env(safe-area-inset-left, 0px)) !important;
    padding-right: calc(var(--sp-3) + env(safe-area-inset-right, 0px)) !important;
    overflow-x: hidden !important;
  }
  #app.exam-active { padding: 0.4rem !important; }
  #app > div { min-width: 0; width: 100%; max-width: 100% !important; box-sizing: border-box; }
  .glass { padding: var(--sp-4) !important; border-radius: var(--r-lg) !important; }
  .cbt-modal, .modal-box { padding: var(--sp-4) !important; border-radius: var(--r-lg) !important; }
  #timerDisplay { font-size: 1.5rem !important; }
  .cbt-grade-display { font-size: 2.25rem !important; }
  .vtx-score-display  { font-size: 3rem !important; }
  .nav-btn, .cbt-nav-dot { width: 1.625rem !important; height: 1.625rem !important; }
  .btn { font-size: var(--text-sm) !important; }
  #toastContainer { top: var(--sp-3); right: var(--sp-3); max-width: 280px; }
  .max-w-7xl.glass { padding: 0 !important; }
  .max-w-7xl { max-width: 100% !important; width: 100% !important; }
  .max-w-7xl.glass > div:last-child { padding-left: 1rem !important; padding-right: 1rem !important; }
}

/* ── Print ── */
@media print {
  body { background: white; color: black; }
  .glass, .glass-dark { background: white !important; box-shadow: none !important; backdrop-filter: none !important; -webkit-backdrop-filter: none !important; }
  .glass::before, .glass-dark::before { display: none !important; }
  .btn, #toastContainer, .cbt-overlay { display: none !important; }
  #vtx-bg-canvas { display: none !important; }
}

/* ── DM panel overrides ── */
#teacher-dm { min-width: 0 !important; box-sizing: border-box !important; overflow: visible !important; width: 100% !important; max-width: 100% !important; }
#dmTeacherShell { width: 100% !important; max-width: 100% !important; min-width: 0 !important; box-sizing: border-box !important; overflow: hidden !important; }
#dmViewList, #dmViewChat { width: 100% !important; max-width: 100% !important; min-width: 0 !important; box-sizing: border-box !important; overflow: visible !important; }
#dmThreadList { width: 100% !important; max-width: 100% !important; min-width: 0 !important; overflow-x: hidden !important; overflow-y: auto !important; box-sizing: border-box !important; }
.dm-thread-item { width: 100% !important; max-width: 100% !important; min-width: 0 !important; box-sizing: border-box !important; overflow: hidden !important; }
.dm-thread-bd { flex: 1 1 0% !important; min-width: 0 !important; max-width: 100% !important; overflow: hidden !important; }
.dm-thread-r1, .dm-thread-r2 { min-width: 0 !important; max-width: 100% !important; overflow: hidden !important; }
.dm-thread-name, .dm-thread-preview, .dm-thread-presence { min-width: 0 !important; overflow: hidden !important; text-overflow: ellipsis !important; white-space: nowrap !important; max-width: 100% !important; }
.dm-thread-av { flex-shrink: 0 !important; min-width: 42px !important; }
.dm-thread-preview { flex: 1 1 0% !important; }

@media (max-width: 768px) {
  #teacher-dm { margin-left: -1.25rem !important; margin-right: -1.25rem !important; width: calc(100% + 2.5rem) !important; max-width: calc(100% + 2.5rem) !important; }
  #dmTeacherShell { border-radius: 0 !important; border-left: none !important; border-right: none !important; }
  .dm-thread-item { padding: 0.625rem 1rem !important; gap: 0.625rem !important; }
  .dm-thread-av, .dm-thread-av-circle { width: 36px !important; height: 36px !important; min-width: 36px !important; }
  .dm-thread-date { font-size: 0.625rem !important; flex-shrink: 0 !important; }
  .dm-thread-class { max-width: 140px !important; }
  #dmViewChat > div:first-child { padding: 0.5rem 0.875rem !important; }
  #dmViewChat > div:last-child  { padding: 0.5rem 0.875rem !important; }
}

/* ═══════════════════════════════════════════════════════════
   VISUAL LOADING STATE
═══════════════════════════════════════════════════════════ */
.vtx-visual-container {
  width: 100%;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-subtle);
}

.vtx-visual-skeleton {
  width: 100%;
  aspect-ratio: 16 / 10;
  position: relative;
  overflow: hidden;
  background: var(--bg-muted, #f0f0f2);
}

.vtx-visual-skeleton::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.25) 40%,
    rgba(255, 255, 255, 0.55) 50%,
    rgba(255, 255, 255, 0.25) 60%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: vtx-shimmer 1.6s ease-in-out infinite;
}

.vtx-visual-skeleton-icon {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
}

.vtx-visual-skeleton-icon i {
  font-size: 28px;
  color: var(--text-4, #bbb);
  opacity: .6;
}

.vtx-visual-skeleton-label {
  font-size: .6875rem;
  font-weight: 600;
  color: var(--text-4, #bbb);
  letter-spacing: .04em;
  opacity: .8;
}

.vtx-visual-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem .75rem;
  border-top: 1px solid var(--border);
  background: var(--bg-base);
}

.vtx-visual-footer-topic {
  font-size: .6875rem;
  color: var(--text-3);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.vtx-visual-footer-badge {
  flex-shrink: 0;
  font-size: .5625rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: 99px;
  margin-left: .5rem;
}

.vtx-visual-footer-badge.is-loading {
  background: var(--bg-muted, #f0f0f2);
  color: var(--text-4);
}

.vtx-visual-footer-badge.is-svg {
  background: var(--accent-subtle);
  color: var(--accent-text);
}

.vtx-visual-footer-badge.is-image {
  background: var(--success-subtle, #ecfdf5);
  color: var(--success-text, #166534);
}

.vtx-visual-footer-badge.is-error {
  background: var(--warning-subtle);
  color: var(--warning-text);
}

.vtx-visual-content-wrap {
  width: 100%;
  display: block;
}

.vtx-visual-content-wrap svg {
  width: 100%;
  height: auto;
  display: block;
}

.vtx-visual-content-wrap img {
  width: 100%;
  height: auto;
  display: block;
}

.vtx-visual-quota-row {
  font-size: .6rem;
  color: var(--text-4);
  text-align: right;
  padding: .25rem .75rem .375rem;
  background: var(--bg-base);
  border-top: 1px solid var(--border);
}

.vtx-visual-rate-wrap {
  padding: .875rem 1rem;
  display: flex;
  flex-direction: column;
  gap: .625rem;
}

.vtx-visual-rate-row {
  display: flex;
  align-items: flex-start;
  gap: .5rem;
}

.vtx-visual-rate-row i {
  font-size: 16px;
  color: var(--warning);
  flex-shrink: 0;
  margin-top: 1px;
}

.vtx-visual-rate-title {
  font-size: .8125rem;
  font-weight: 700;
  color: var(--warning-text);
  margin: 0 0 .2rem;
}

.vtx-visual-rate-msg {
  font-size: .75rem;
  color: var(--text-3);
  margin: 0;
  line-height: 1.5;
}

.vtx-visual-fallback-row {
  display: flex;
  align-items: center;
  gap: .375rem;
  font-size: .75rem;
  color: var(--text-3);
}

.vtx-visual-fallback-row i {
  font-size: 13px;
  color: var(--accent);
}

.vtx-visual-fallback-bar {
  width: 100%;
  height: 3px;
  border-radius: 2px;
  background: var(--accent);
  animation: vtx-visual-loading 1.2s ease-in-out infinite;
}

@keyframes vtx-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes vtx-visual-loading {
  0%, 100% { opacity: .3; transform: scaleX(.5); }
  50%       { opacity: 1;  transform: scaleX(1);  }
}

/* ── AI Chat overflow protection ── */
#vtxAiSheet {
  overflow: hidden;
}

#vtxAiMessages {
  min-width: 0 !important;
  overflow-x: hidden !important;
  box-sizing: border-box !important;
}

#vtxAiMessages > * {
  max-width: 100% !important;
  box-sizing: border-box !important;
  min-width: 0 !important;
}

#vtxAiMessages .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
  padding-bottom: 3px;
}

#vtxAiMessages .katex-display > .katex {
  white-space: nowrap;
}

#vtxAiMessages .katex {
  font-size: 0.92em;
}

/* ── AI Drawer — table overflow protection ── */
#vtxAiMessages table,
.se-explain-deep-text table {
  table-layout: fixed !important;
  width: 100% !important;
  word-break: break-word !important;
}

#vtxAiMessages th,
#vtxAiMessages td,
.se-explain-deep-text th,
.se-explain-deep-text td {
  word-break: break-word !important;
  overflow-wrap: anywhere !important;
  white-space: normal !important;
}

/* ── AI bubble containment ── */
#vtxAiMessages .vtx-ai-user-bubble,
#vtxAiMessages .vtx-ai-reply-bubble {
  overflow: hidden !important;
  overflow-wrap: break-word !important;
  word-break: break-word !important;
  box-sizing: border-box !important;
}

/* ── AI input shell unified border ── */
#vtxAiInputShell {
  border: 1.5px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--bg-subtle);
  transition: border-color var(--t-fast);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#vtxAiInputShell:focus-within {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

#vtxAiInputShell textarea {
  border: none !important;
  outline: none !important;
  box-shadow: none !important;
}

/* ═══════════════════════════════════════════════════════════
   LIVE MODE — Real-time voice conversation
═══════════════════════════════════════════════════════════ */

@keyframes vtx-live-pulse {
  0%   { transform: scale(1);   opacity: 0.55; }
  50%  { transform: scale(1.18); opacity: 0.2;  }
  100% { transform: scale(1);   opacity: 0.55; }
}
@keyframes vtx-live-speak {
  0%   { transform: scale(1); }
  25%  { transform: scale(1.06); }
  50%  { transform: scale(1); }
  75%  { transform: scale(1.04); }
  100% { transform: scale(1); }
}
@keyframes vtx-live-spin {
  to { transform: rotate(360deg); }
}

#vtxAiLiveToggle {
  width: 32px;
  height: 32px;
  border-radius: var(--r-full);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--text-3);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all var(--t-fast) var(--ease);
  flex-shrink: 0;
  margin-right: 0.375rem;
}
#vtxAiLiveToggle:hover {
  background: var(--accent-subtle);
  border-color: var(--accent-border);
  color: var(--accent);
}
#vtxAiLiveToggle.is-active {
  background: var(--accent) !important;
  border-color: var(--accent) !important;
  color: #fff !important;
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

#vtxAiLiveOrbRing.is-listening {
  opacity: 1 !important;
  animation: vtx-live-pulse 1.4s ease-in-out infinite;
  border-color: var(--accent);
}
#vtxAiLiveOrbRing.is-speaking {
  opacity: 1 !important;
  animation: vtx-live-speak 1.2s ease-in-out infinite;
  border-color: var(--success);
}
#vtxAiLiveOrbRing.is-thinking {
  opacity: 1 !important;
  animation: vtx-live-pulse 0.9s ease-in-out infinite;
  border-color: var(--warning);
}
#vtxAiLiveOrbCore.is-listening {
  animation: vtx-live-pulse 2s ease-in-out infinite;
}
#vtxAiLiveOrbCore.is-speaking {
  background: var(--success) !important;
  animation: vtx-live-speak 1.2s ease-in-out infinite;
}
#vtxAiLiveOrbCore.is-thinking {
  background: var(--warning) !important;
}
#vtxAiLiveOrbIcon.is-thinking {
  animation: vtx-live-spin 1s linear infinite;
  display: inline-block;
}

/* ═══════════════════════════════════════════════════════════
   FULL-SCREEN CLOCK
═══════════════════════════════════════════════════════════ */
.vtx-clock-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9500;
  flex-direction: column;
  background: var(--bg-page);
  opacity: 0;
  transform: scale(0.97);
  transition: opacity .3s var(--ease), transform .3s var(--ease);
}
.vtx-clock-modal.is-open { opacity: 1; transform: scale(1); }

.vtx-clock-modal::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 55% at 50% 38%, var(--accent-subtle) 0%, transparent 65%);
  pointer-events: none;
}
[data-theme="dark"] .vtx-clock-modal::before {
  background: radial-gradient(ellipse 80% 55% at 50% 38%, rgba(107,135,248,.08) 0%, transparent 65%);
}

.vtx-clock-topbar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: .5rem;
  padding: calc(.875rem + env(safe-area-inset-top, 0px)) 1rem .5rem;
  position: relative;
  z-index: 1;
}
.vtx-clock-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--r-full);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), transform var(--t-fast);
  -webkit-tap-highlight-color: transparent;
}
.vtx-clock-icon-btn:hover { background: var(--accent-subtle); color: var(--accent); }
.vtx-clock-icon-btn:active { transform: scale(0.92); }
.vtx-clock-icon-btn i { font-size: 18px; pointer-events: none; }

.vtx-clock-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 1.25rem;
  position: relative;
  z-index: 1;
}
.vtx-clock-digital, .vtx-clock-analogue {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  animation: vtx-clock-fade-in .4s var(--ease) both;
}
@keyframes vtx-clock-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Digital face ── */
.vtx-clock-digital-time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(3.25rem, 17vw, 8.5rem);
  color: var(--text-1);
  letter-spacing: -.01em;
  line-height: 1;
  display: flex;
  align-items: flex-start;
}
.vtx-clock-colon {
  animation: vtx-clock-blink 2s steps(1, end) infinite;
  margin: 0 .02em;
}
@keyframes vtx-clock-blink { 50% { opacity: .2; } }
.vtx-clock-digital-sec {
  font-size: .32em;
  opacity: .5;
  margin-left: .35rem;
  margin-top: .4em;
  font-weight: 600;
}
.vtx-clock-digital-period {
  font-size: .22em;
  opacity: .6;
  margin-left: .5rem;
  margin-top: .55em;
  letter-spacing: .12em;
  font-weight: 700;
}
.vtx-clock-date {
  margin-top: 1rem;
  font-size: .9375rem;
  color: var(--text-3);
  letter-spacing: .02em;
  text-align: center;
}

/* ── Analogue face ── */
.vtx-clock-analogue { width: 100%; }
.vtx-clock-face {
  position: relative;
  width: min(76vw, 340px);
  height: min(76vw, 340px);
  border-radius: 50%;
  margin: 0 auto;
  background:
    radial-gradient(circle at 32% 26%, rgba(255,255,255,.55) 0%, transparent 45%),
    radial-gradient(circle at 68% 76%, rgba(0,0,0,.10) 0%, transparent 55%),
    var(--bg-base);
  box-shadow:
    0 26px 54px -16px rgba(0,0,0,.4),
    0 8px 20px -6px rgba(0,0,0,.28),
    inset 0 2px 5px rgba(255,255,255,.65),
    inset 0 -8px 16px rgba(0,0,0,.2),
    0 0 0 9px var(--bg-subtle),
    0 0 0 10px var(--border);
}
[data-theme="dark"] .vtx-clock-face {
  background:
    radial-gradient(circle at 32% 26%, rgba(255,255,255,.08) 0%, transparent 45%),
    radial-gradient(circle at 68% 76%, rgba(0,0,0,.35) 0%, transparent 55%),
    var(--bg-base);
  box-shadow:
    0 26px 54px -16px rgba(0,0,0,.65),
    0 8px 20px -6px rgba(0,0,0,.5),
    inset 0 2px 5px rgba(255,255,255,.05),
    inset 0 -8px 16px rgba(0,0,0,.45),
    0 0 0 9px var(--bg-muted),
    0 0 0 10px var(--border-strong);
}

.vtx-clock-ticks-hour, .vtx-clock-ticks-minute { position: absolute; inset: 0; }
.vtx-tick-hour, .vtx-tick-minute {
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  transform-origin: 50% 50%;
}
.vtx-tick-hour::before {
  content: '';
  display: block;
  width: 3px;
  height: 8%;
  margin-left: -0.5px;
  background: var(--text-1);
  border-radius: 2px;
}
.vtx-tick-minute::before {
  content: '';
  display: block;
  width: 1px;
  height: 4%;
  background: var(--text-4);
  border-radius: 1px;
}

.vtx-clock-numerals { position: absolute; inset: 0; }
.vtx-clock-numeral {
  position: absolute;
  transform: translate(-50%, -50%);
  font-family: var(--font);
  font-weight: 700;
  font-size: clamp(.8125rem, 3.6vw, 1.0625rem);
  color: var(--text-2);
  font-variant-numeric: tabular-nums;
  user-select: none;
}

.vtx-clock-hand {
  position: absolute;
  bottom: 50%;
  left: 50%;
  transform-origin: 50% 100%;
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(0,0,0,.3);
}
.vtx-hand-hour {
  width: 5px;
  height: 26%;
  background: var(--text-1);
  transition: transform .5s cubic-bezier(0.34, 1.1, 0.64, 1);
}
.vtx-hand-minute {
  width: 3.5px;
  height: 37%;
  background: var(--text-1);
  transition: transform .4s cubic-bezier(0.34, 1.1, 0.64, 1);
}
.vtx-hand-second {
  width: 1.5px;
  height: 42%;
  background: var(--danger);
  transition: transform .15s cubic-bezier(.4, 0, .2, 1);
}
.vtx-clock-pivot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle at 35% 30%, #fff, var(--accent) 60%, var(--accent-hover) 100%);
  box-shadow: 0 2px 6px rgba(0,0,0,.4), inset 0 -1px 2px rgba(0,0,0,.25);
  z-index: 5;
}

/* ── NOW / NEXT ── */
.vtx-clock-events {
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
  padding: 0 1.25rem calc(1.5rem + env(safe-area-inset-bottom, 0px));
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .375rem;
  position: relative;
  z-index: 1;
}
.vtx-clock-now-label {
  display: block;
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-4);
}
.vtx-clock-now-value {
  display: block;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-1);
  margin-top: .2rem;
  line-height: 1.3;
}
.vtx-clock-next-label {
  display: block;
  font-size: .625rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-4);
  margin-top: .75rem;
}
.vtx-clock-next-value {
  display: block;
  font-size: .9375rem;
  font-weight: 600;
  color: var(--text-3);
  margin-top: .15rem;
}
.vtx-clock-offline-note {
  display: flex;
  align-items: center;
  gap: .375rem;
  font-size: .6875rem;
  color: var(--warning-text);
  background: var(--warning-subtle);
  border: 1px solid var(--warning-border);
  padding: .3rem .625rem;
  border-radius: var(--r-full);
  margin-top: .625rem;
}
.vtx-clock-offline-note i { font-size: 13px; }