/* ============================================================
   RETROBOARD — DESIGN SYSTEM
   Dark glassmorphism aesthetic with neon purple + cyan accents
   ============================================================ */

/* ------------------------------------------------------------
   1. CUSTOM PROPERTIES
   ------------------------------------------------------------ */
:root {
  /* Colours */
  --color-bg:           #0a0a0f;
  --color-surface:      #111118;
  --color-surface-2:    #1a1a28;
  --color-surface-3:    #22223a;

  --color-primary:      #8b5cf6;
  --color-primary-dark: #6d28d9;
  --color-primary-light:#a78bfa;

  --color-accent:       #06b6d4;
  --color-accent-dark:  #0891b2;
  --color-accent-light: #22d3ee;

  --color-success:      #34d399;
  --color-warning:      #fbbf24;
  --color-danger:       #f87171;
  --color-pink:         #f472b6;

  --color-text:         #f1f5f9;
  --color-text-muted:   #94a3b8;
  --color-text-dim:     #475569;

  --color-border:       rgba(255, 255, 255, 0.07);
  --color-border-hover: rgba(139, 92, 246, 0.4);

  /* Spacing */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Radius */
  --radius-sm: 6px;
  --radius:    12px;
  --radius-lg: 20px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:      0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow:         0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg:      0 8px 32px rgba(0, 0, 0, 0.6);
  --shadow-primary: 0 0 24px rgba(139, 92, 246, 0.35);
  --shadow-accent:  0 0 24px rgba(6, 182, 212, 0.3);

  /* Glass effect */
  --glass-bg:     rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur:   blur(12px);

  /* Typography */
  --font-sans: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition:        250ms ease;
  --transition-slow:   400ms ease;

  /* Z-index scale */
  --z-base:    0;
  --z-raised:  10;
  --z-overlay: 100;
  --z-modal:   200;
  --z-toast:   300;
  --z-nav:     400;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-light);
}

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

input, button, textarea, select {
  font: inherit;
}

ul, ol {
  list-style: none;
}

/* ------------------------------------------------------------
   3. TYPOGRAPHY SCALE
   ------------------------------------------------------------ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.2rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
  color: var(--color-text-muted);
  line-height: 1.7;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-muted   { color: var(--color-text-muted); }
.text-dim     { color: var(--color-text-dim); }
.text-primary { color: var(--color-primary-light); }
.text-accent  { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-danger  { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }

.text-sm  { font-size: 0.875rem; }
.text-xs  { font-size: 0.75rem; }
.text-lg  { font-size: 1.125rem; }
.text-xl  { font-size: 1.25rem; }

.font-mono { font-family: var(--font-mono); }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

/* ------------------------------------------------------------
   4. GLASS EFFECT
   ------------------------------------------------------------ */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
}

.glass-dark {
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.glass-card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-primary);
}

/* ------------------------------------------------------------
   5. GLOW UTILITIES
   ------------------------------------------------------------ */
.glow {
  text-shadow: 0 0 20px rgba(139, 92, 246, 0.8),
               0 0 40px rgba(139, 92, 246, 0.4);
}

.glow-accent {
  text-shadow: 0 0 20px rgba(6, 182, 212, 0.8),
               0 0 40px rgba(6, 182, 212, 0.4);
}

.glow-box {
  box-shadow: 0 0 0 1px rgba(139, 92, 246, 0.5),
              0 0 20px rgba(139, 92, 246, 0.3),
              0 0 40px rgba(139, 92, 246, 0.1);
}

.glow-box-accent {
  box-shadow: 0 0 0 1px rgba(6, 182, 212, 0.5),
              0 0 20px rgba(6, 182, 212, 0.3),
              0 0 40px rgba(6, 182, 212, 0.1);
}

/* ------------------------------------------------------------
   6. BUTTONS
   ------------------------------------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.65rem 1.4rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
  letter-spacing: 0.01em;
}

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

/* Primary — purple gradient */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(139, 92, 246, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.55);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(0);
}

/* Ghost — transparent outlined */
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  background: var(--glass-bg);
  border-color: var(--color-border-hover);
  color: var(--color-text);
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.2);
}

/* Accent — cyan */
.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(6, 182, 212, 0.35);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.5);
  color: #fff;
}

/* Danger */
.btn-danger {
  background: transparent;
  color: var(--color-danger);
  border: 1px solid rgba(248, 113, 113, 0.3);
}

.btn-danger:hover {
  background: rgba(248, 113, 113, 0.1);
  border-color: var(--color-danger);
}

/* Icon button */
.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius);
  background: var(--glass-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  background: var(--color-surface-2);
  border-color: var(--color-border-hover);
  color: var(--color-text);
}

/* Button sizes */
.btn-sm {
  padding: 0.4rem 1rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.85rem 2rem;
  font-size: 1.0625rem;
}

.btn-full {
  width: 100%;
}

/* ------------------------------------------------------------
   7. BADGES
   ------------------------------------------------------------ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* Phase badges */
.badge-reflect  { background: rgba(139, 92, 246, 0.18); color: #a78bfa; border: 1px solid rgba(139, 92, 246, 0.3); }
.badge-group    { background: rgba(6, 182, 212, 0.15);  color: #22d3ee; border: 1px solid rgba(6, 182, 212, 0.3); }
.badge-vote     { background: rgba(251, 191, 36, 0.15); color: #fcd34d; border: 1px solid rgba(251, 191, 36, 0.3); }
.badge-discuss  { background: rgba(244, 114, 182, 0.15); color: #f9a8d4; border: 1px solid rgba(244, 114, 182, 0.3); }
.badge-done     { background: rgba(52, 211, 153, 0.15); color: #6ee7b7; border: 1px solid rgba(52, 211, 153, 0.3); }

/* Template badges */
.badge-ssc     { background: rgba(52, 211, 153, 0.12); color: #6ee7b7; border: 1px solid rgba(52, 211, 153, 0.25); }
.badge-msg     { background: rgba(248, 113, 113, 0.12); color: #fca5a5; border: 1px solid rgba(248, 113, 113, 0.25); }
.badge-4ls     { background: rgba(6, 182, 212, 0.12);  color: #67e8f9; border: 1px solid rgba(6, 182, 212, 0.25); }
.badge-sail    { background: rgba(251, 191, 36, 0.12); color: #fde68a; border: 1px solid rgba(251, 191, 36, 0.25); }
.badge-pd      { background: rgba(139, 92, 246, 0.12); color: #c4b5fd; border: 1px solid rgba(139, 92, 246, 0.25); }
.badge-custom  { background: rgba(244, 114, 182, 0.12); color: #fbcfe8; border: 1px solid rgba(244, 114, 182, 0.25); }

/* Neutral badge */
.badge-muted   { background: rgba(148, 163, 184, 0.1); color: var(--color-text-muted); border: 1px solid rgba(148, 163, 184, 0.15); }

/* ------------------------------------------------------------
   8. AVATAR
   ------------------------------------------------------------ */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  font-weight: 700;
  letter-spacing: 0;
  flex-shrink: 0;
  border: 2px solid var(--color-bg);
}

.avatar-sm  { width: 28px; height: 28px; font-size: 0.65rem; }
.avatar-md  { width: 36px; height: 36px; font-size: 0.8rem; }
.avatar-lg  { width: 44px; height: 44px; font-size: 0.95rem; }
.avatar-xl  { width: 56px; height: 56px; font-size: 1.1rem; }

/* Avatar colour variants */
.avatar-purple  { background: rgba(139, 92, 246, 0.25); color: #a78bfa; border-color: rgba(139, 92, 246, 0.4); }
.avatar-cyan    { background: rgba(6, 182, 212, 0.2);   color: #22d3ee; border-color: rgba(6, 182, 212, 0.35); }
.avatar-green   { background: rgba(52, 211, 153, 0.2);  color: #34d399; border-color: rgba(52, 211, 153, 0.35); }
.avatar-pink    { background: rgba(244, 114, 182, 0.2); color: #f472b6; border-color: rgba(244, 114, 182, 0.35); }
.avatar-yellow  { background: rgba(251, 191, 36, 0.2);  color: #fbbf24; border-color: rgba(251, 191, 36, 0.35); }
.avatar-red     { background: rgba(248, 113, 113, 0.2); color: #f87171; border-color: rgba(248, 113, 113, 0.35); }

/* Avatar group (overlapping) */
.avatar-group {
  display: flex;
  flex-direction: row-reverse;
}

.avatar-group .avatar {
  margin-left: -10px;
  transition: margin var(--transition-fast);
}

.avatar-group:hover .avatar {
  margin-left: -4px;
}

/* ------------------------------------------------------------
   9. CHIP / TAG
   ------------------------------------------------------------ */
.chip {
  display: inline-block;
  padding: 2px 8px;
  font-size: 0.72rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  background: var(--color-surface-3);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  white-space: nowrap;
}

/* ------------------------------------------------------------
   10. FORM INPUTS
   ------------------------------------------------------------ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
}

.form-label-muted {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.form-control {
  width: 100%;
  padding: 0.65rem 1rem;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-control::placeholder {
  color: var(--color-text-dim);
}

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.form-control-lg {
  padding: 0.85rem 1.2rem;
  font-size: 1.0625rem;
  border-radius: var(--radius-lg);
}

.form-control-mono {
  font-family: var(--font-mono);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

textarea.form-control {
  resize: vertical;
  min-height: 80px;
}

/* Checkbox */
.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.form-check-input {
  width: 18px;
  height: 18px;
  appearance: none;
  border: 2px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-surface-2);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  position: relative;
}

.form-check-input:checked {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.form-check-input:checked::after {
  content: '✓';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: white;
  font-weight: 700;
}

.form-check-label {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  cursor: pointer;
}

/* Toggle switch */
.form-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.toggle-track {
  width: 44px;
  height: 24px;
  background: var(--color-surface-3);
  border-radius: var(--radius-full);
  position: relative;
  cursor: pointer;
  transition: background var(--transition-fast);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.toggle-track.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.toggle-thumb {
  width: 18px;
  height: 18px;
  background: white;
  border-radius: var(--radius-full);
  position: absolute;
  top: 2px;
  left: 3px;
  transition: transform var(--transition-fast);
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.toggle-track.active .toggle-thumb {
  transform: translateX(20px);
}

/* Password strength bar */
.strength-bar {
  display: flex;
  gap: 3px;
  margin-top: var(--space-1);
}

.strength-segment {
  flex: 1;
  height: 3px;
  border-radius: var(--radius-full);
  background: var(--color-surface-3);
  transition: background var(--transition);
}

.strength-segment.weak    { background: var(--color-danger); }
.strength-segment.fair    { background: var(--color-warning); }
.strength-segment.good    { background: var(--color-accent); }
.strength-segment.strong  { background: var(--color-success); }

/* ── Toggle switch ──────────────────────────────────────────── */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-switch .slider {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background: var(--color-surface-3, #2a2a38);
  border: 1px solid var(--color-border);
  transition: background var(--transition-fast);
  cursor: pointer;
}

.toggle-switch .slider::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  left: 2px;
  top: 50%;
  transform: translateY(-50%);
  border-radius: 50%;
  background: var(--color-text-dim);
  transition: all var(--transition-fast);
}

.toggle-switch input:checked + .slider {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.toggle-switch input:checked + .slider::before {
  left: calc(100% - 18px);
  background: white;
}

/* Divider */
.form-divider {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  color: var(--color-text-dim);
  font-size: 0.8125rem;
}

.form-divider::before,
.form-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

/* ------------------------------------------------------------
   11. CARD
   ------------------------------------------------------------ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition);
}

.card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-primary);
  transform: translateY(-2px);
}

.card-sm {
  padding: var(--space-4);
  border-radius: var(--radius);
}

/* ------------------------------------------------------------
   12. SECTION UTILITIES
   ------------------------------------------------------------ */
.section {
  padding: var(--space-16) 0;
}

.section-sm {
  padding: var(--space-10) 0;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-narrow {
  max-width: 800px;
}

.container-wide {
  max-width: 1400px;
}

/* Grid */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .container { padding: 0 var(--space-4); }
  .section { padding: var(--space-10) 0; }
}

/* Flex helpers */
.flex          { display: flex; }
.flex-center   { display: flex; align-items: center; justify-content: center; }
.flex-between  { display: flex; align-items: center; justify-content: space-between; }
.flex-gap-2    { gap: var(--space-2); }
.flex-gap-3    { gap: var(--space-3); }
.flex-gap-4    { gap: var(--space-4); }

/* ------------------------------------------------------------
   13. ANIMATIONS / KEYFRAMES
   ------------------------------------------------------------ */

/* Floating y-oscillation for 3D objects + decorative elements */
@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  33%       { transform: translateY(-8px) rotate(0.5deg); }
  66%       { transform: translateY(4px) rotate(-0.3deg); }
}

/* Fade + slide up entrance */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Subtle fade in */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Neon pulse for timer end / alerts */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 8px rgba(248, 113, 113, 0.4); }
  50%       { box-shadow: 0 0 32px rgba(248, 113, 113, 0.9), 0 0 60px rgba(248, 113, 113, 0.4); }
}

/* Spin (loading states) */
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Gradient shimmer (skeleton loading) */
@keyframes shimmer {
  from { background-position: -200% 0; }
  to   { background-position:  200% 0; }
}

/* Entrance animation class */
.animate-fade-in    { animation: fadeIn 0.4s ease forwards; }
.animate-fade-in-up { animation: fadeInUp 0.5s ease forwards; }
.animate-float      { animation: float 4s ease-in-out infinite; }
.animate-pulse-glow { animation: pulse-glow 0.8s ease-in-out infinite; }
.animate-spin       { animation: spin-slow 1.5s linear infinite; }

/* Stagger helper — add delay via inline style or nth-child */
.stagger-1 { animation-delay: 0.05s; }
.stagger-2 { animation-delay: 0.1s; }
.stagger-3 { animation-delay: 0.15s; }
.stagger-4 { animation-delay: 0.2s; }
.stagger-5 { animation-delay: 0.25s; }
.stagger-6 { animation-delay: 0.3s; }

/* Initial hidden state for scroll-triggered animations */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ------------------------------------------------------------
   14. CUSTOM SCROLLBAR
   ------------------------------------------------------------ */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-surface-3);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-dark);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-surface-3) transparent;
}

/* ------------------------------------------------------------
   15. TOOLTIPS
   ------------------------------------------------------------ */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%) scale(0.85);
  background: var(--color-surface-3);
  color: var(--color-text);
  font-size: 0.75rem;
  white-space: nowrap;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  pointer-events: none;
  opacity: 0;
  transition: all var(--transition-fast);
  z-index: var(--z-toast);
}

[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* ------------------------------------------------------------
   16. NOTIFICATION / TOAST
   ------------------------------------------------------------ */
.toast {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-toast);
  animation: fadeInUp 0.3s ease;
  pointer-events: none;
}

.toast-success { background: rgba(52, 211, 153, 0.15); border: 1px solid rgba(52, 211, 153, 0.4); color: var(--color-success); }
.toast-error   { background: rgba(248, 113, 113, 0.15); border: 1px solid rgba(248, 113, 113, 0.4); color: var(--color-danger); }
.toast-info    { background: rgba(139, 92, 246, 0.15); border: 1px solid rgba(139, 92, 246, 0.4); color: var(--color-primary-light); }

/* ------------------------------------------------------------
   17. UTILITY CLASSES
   ------------------------------------------------------------ */
.hidden   { display: none !important; }
.sr-only  { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.relative { position: relative; }
.absolute { position: absolute; }
.inset-0  { inset: 0; }
.w-full   { width: 100%; }
.h-full   { height: 100%; }

/* Spacing */
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* Text align */
.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* Opacity */
.opacity-50 { opacity: 0.5; }
.opacity-70 { opacity: 0.7; }