/**
 * ============================================
 * AI Agency Framework — MAIN STYLESHEET
 * ============================================
 * Component Classes | BEM Naming | Layout System
 * ============================================
 */

@import url('./tokens.css');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Space+Grotesk:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ============================================
   1. BASE RESET & GLOBALS
   ============================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

html.lenis,
html.lenis body {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

.lenis.lenis-stopped {
  overflow: hidden;
}

.lenis.lenis-smooth iframe {
  pointer-events: none;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--duration-medium) var(--ease-smooth),
              color var(--duration-medium) var(--ease-smooth);
  overflow-x: hidden;
}

/* Selection */
::selection {
  background-color: var(--accent-primary);
  color: var(--color-space-500);
}

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-space-200);
  border-radius: var(--radius-full);
}

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

/* ============================================
   2. TYPOGRAPHY SYSTEM
   ============================================ */

/* Headlines — Space Grotesk */
.headline {
  font-family: var(--font-headline);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tighter);
  color: var(--text-primary);
}

.headline--display {
  font-size: var(--text-display);
  line-height: var(--leading-none);
  letter-spacing: var(--tracking-tighter);
}

.headline--6xl {
  font-size: var(--text-6xl);
}

.headline--5xl {
  font-size: var(--text-5xl);
}

.headline--4xl {
  font-size: var(--text-4xl);
}

.headline--3xl {
  font-size: var(--text-3xl);
  line-height: var(--leading-snug);
}

.headline--2xl {
  font-size: var(--text-2xl);
  line-height: var(--leading-snug);
}

.headline--xl {
  font-size: var(--text-xl);
  line-height: var(--leading-snug);
  font-weight: var(--weight-semibold);
}

.headline--lg {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
}

/* Body — Inter */
.body {
  font-family: var(--font-body);
  color: var(--text-primary);
}

.body--lg {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
}

.body--base {
  font-size: var(--text-base);
  line-height: var(--leading-normal);
}

.body--sm {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.body--xs {
  font-size: var(--text-xs);
  line-height: var(--leading-normal);
}

/* Mono — JetBrains Mono (for data/code) */
.mono {
  font-family: var(--font-mono);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
}

.mono--lg {
  font-size: var(--text-lg);
}

.mono--base {
  font-size: var(--text-sm);
  text-transform: uppercase;
}

.mono--sm {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--text-tertiary);
}

/* Eyebrow Label */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
}

/* Accent Text Gradient */
.text-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gradient--animated {
  background: linear-gradient(
    90deg,
    var(--color-cyan-500),
    var(--gradient-neural-2),
    var(--gradient-neural-3),
    var(--color-cyan-500)
  );
  background-size: 300% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ============================================
   3. LAYOUT SYSTEM
   ============================================ */

/* Container */
.container {
  width: 100%;
  max-width: var(--content-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--section-px);
  padding-right: var(--section-px);
}

.container--narrow {
  max-width: var(--content-narrow);
}

.container--wide {
  max-width: var(--content-wide);
}

.container--full {
  max-width: 100%;
  padding-left: var(--section-px);
  padding-right: var(--section-px);
}

/* Section */
.section {
  position: relative;
  min-height: var(--section-min-height);
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.section--auto {
  min-height: auto;
}

.section--small {
  min-height: 50vh;
}

.section--dark {
  background-color: var(--bg-primary);
}

.section--light {
  background-color: var(--bg-secondary);
}

.section--gradient {
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

/* Grid */
.grid {
  display: grid;
  gap: var(--grid-gap);
}

.grid--12 {
  grid-template-columns: repeat(var(--grid-columns), 1fr);
}

.grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Flex */
.flex {
  display: flex;
}

.flex--col {
  flex-direction: column;
}

.flex--wrap {
  flex-wrap: wrap;
}

.flex--center {
  justify-content: center;
  align-items: center;
}

.flex--between {
  justify-content: space-between;
  align-items: center;
}

/* ============================================
   4. PROGRESS INDICATOR
   ============================================ */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-cyan-500), var(--gradient-neural-2));
  box-shadow: var(--glow-sm);
  z-index: var(--z-progress);
  transition: width 0.1s linear;
  pointer-events: none;
}

.progress-bar--complete {
  opacity: 0;
  transition: opacity 0.3s ease 0.5s;
}

/* ============================================
   5. NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  z-index: var(--z-fixed);
  transition: height var(--duration-medium) var(--ease-cinematic),
              background-color var(--duration-medium) var(--ease-smooth),
              backdrop-filter var(--duration-medium) var(--ease-smooth),
              box-shadow var(--duration-medium) var(--ease-smooth);
}

.nav--transparent {
  background-color: transparent;
}

.nav--solid {
  height: var(--header-height-scrolled);
  background-color: var(--bg-overlay);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  box-shadow: var(--shadow-sm);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: 0 var(--section-px);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text-primary);
}

.nav__logo {
  width: 32px;
  height: 32px;
}

.nav__logo-text {
  font-family: var(--font-headline);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav__link {
  position: relative;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--space-2) 0;
  transition: color var(--duration-normal) var(--ease-smooth);
  overflow: hidden;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--accent-primary);
  transform: translateX(-101%);
  transition: transform var(--duration-medium) var(--ease-cinematic);
}

.nav__link:hover {
  color: var(--text-primary);
}

.nav__link:hover::after {
  transform: translateX(0);
}

.nav__link--active {
  color: var(--accent-primary);
}

.nav__link--active::after {
  transform: translateX(0);
  background: linear-gradient(90deg, var(--color-cyan-500), var(--gradient-neural-2));
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Mobile Menu Toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  background: none;
  border: none;
  cursor: pointer;
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform var(--duration-normal) var(--ease-cinematic),
              opacity var(--duration-normal) var(--ease-cinematic);
}

.nav__toggle--active .nav__toggle-bar:first-child {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle--active .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav__toggle--active .nav__toggle-bar:last-child {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-8);
    background-color: var(--bg-overlay);
    backdrop-filter: var(--backdrop-blur);
    transform: translateX(100%);
    transition: transform var(--duration-slow) var(--ease-cinematic);
  }

  .nav__links--open {
    transform: translateX(0);
  }

  .nav__link {
    font-size: var(--text-2xl);
    font-family: var(--font-headline);
  }
}

/* ============================================
   6. BUTTONS
   ============================================ */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  border: none;
  border-radius: var(--button-radius);
  cursor: pointer;
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-cinematic),
              box-shadow var(--duration-normal) var(--ease-smooth);
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* Button Sizes */
.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn--md {
  padding: var(--space-3) var(--space-6);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn--xl {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
}

/* Primary Button */
.btn--primary {
  background: var(--accent-gradient);
  color: var(--color-space-500);
  box-shadow: var(--shadow-sm);
}

.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transform: translateX(-100%);
  transition: transform var(--duration-medium) var(--ease-cinematic);
}

.btn--primary:hover {
  transform: scale(1.02);
  box-shadow: var(--glow-md);
}

.btn--primary:hover::before {
  transform: translateX(100%);
}

.btn--primary:active {
  transform: scale(0.98);
}

/* Secondary Button */
.btn--secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-default);
}

.btn--secondary::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--color-cyan-500), var(--gradient-neural-2));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-smooth);
}

.btn--secondary:hover {
  border-color: transparent;
  transform: scale(1.02);
  box-shadow: var(--glow-sm);
}

.btn--secondary:hover::before {
  opacity: 1;
}

/* Ghost Button */
.btn--ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn--ghost:hover {
  color: var(--text-primary);
  background-color: var(--surface-hover);
}

/* Glow Pulse Animation */
@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 8px var(--accent-glow), 0 0 16px rgba(0, 240, 255, 0.1);
  }
  50% {
    box-shadow: 0 0 16px var(--accent-glow), 0 0 32px rgba(0, 240, 255, 0.2);
  }
}

.btn--glow {
  animation: glowPulse 3s ease-in-out infinite;
}

/* Button with Icon */
.btn__icon {
  width: 18px;
  height: 18px;
  transition: transform var(--duration-normal) var(--ease-cinematic);
}

.btn:hover .btn__icon--right {
  transform: translateX(4px);
}

.btn:hover .btn__icon--left {
  transform: translateX(-4px);
}

/* Magnetic Button Modifier */
.btn--magnetic {
  transition: transform 0.15s ease-out;
}

/* ============================================
   7. CARDS
   ============================================ */
.card {
  position: relative;
  background: var(--surface-glass);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  border: 1px solid var(--border-default);
  border-radius: var(--card-radius);
  padding: var(--space-6);
  overflow: hidden;
  transition: transform var(--duration-medium) var(--ease-cinematic),
              border-color var(--duration-medium) var(--ease-smooth),
              box-shadow var(--duration-medium) var(--ease-smooth);
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: radial-gradient(
    600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(0, 240, 255, 0.15),
    transparent 40%
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--duration-medium) var(--ease-smooth);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-elevated);
}

.card:hover::before {
  opacity: 1;
}

/* Card Variants */
.card--feature {
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.card--article {
  padding: 0;
  overflow: hidden;
}

.card--article .card__image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.card--article .card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-cinematic);
}

.card--article:hover .card__image img {
  transform: scale(1.05);
}

.card--article .card__content {
  padding: var(--space-6);
}

.card--stat {
  text-align: center;
  padding: var(--space-10);
}

.card--glass {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* Card Elements */
.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-active);
  border-radius: var(--radius-md);
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
}

.card__title {
  font-family: var(--font-headline);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.card__description {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
}

/* ============================================
   8. FORM ELEMENTS
   ============================================ */
.input {
  width: 100%;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--text-primary);
  background: var(--surface-glass);
  border: 1px solid var(--border-default);
  border-radius: var(--input-radius);
  padding: var(--space-3) var(--space-4);
  outline: none;
  transition: border-color var(--duration-normal) var(--ease-smooth),
              box-shadow var(--duration-normal) var(--ease-smooth),
              background-color var(--duration-normal) var(--ease-smooth);
}

.input::placeholder {
  color: var(--text-muted);
}

.input:hover {
  border-color: var(--border-hover);
}

.input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.1);
  background-color: var(--surface-hover);
}

/* Input Sizes */
.input--sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

.input--lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
}

/* ============================================
   9. BADGES & TAGS
   ============================================ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--badge-radius);
  border: 1px solid var(--border-default);
}

.badge--accent {
  background: var(--accent-gradient);
  color: var(--color-space-500);
  border-color: transparent;
}

.badge--outline {
  background: transparent;
  color: var(--accent-primary);
  border-color: var(--border-active);
}

.badge--subtle {
  background: var(--surface-active);
  color: var(--text-secondary);
  border-color: transparent;
}

/* ============================================
   10. DIVIDERS
   ============================================ */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--border-default),
    transparent
  );
  border: none;
}

.divider--accent {
  background: linear-gradient(
    90deg,
    transparent,
    var(--accent-primary),
    transparent
  );
  height: 2px;
}

.divider--short {
  width: 60px;
  margin: 0 auto;
  background: var(--accent-primary);
}

/* ============================================
   11. ANIMATED ELEMENTS
   ============================================ */

/* Line Reveal */
.line-reveal {
  position: relative;
  overflow: hidden;
}

.line-reveal::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  transform-origin: right;
}

/* Glow Line */
.glow-line {
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--accent-primary) 20%,
    var(--gradient-neural-2) 50%,
    var(--accent-primary) 80%,
    transparent 100%
  );
  box-shadow: var(--glow-sm);
}

/* Dot Pattern Background */
.dot-pattern {
  background-image: radial-gradient(
    circle,
    var(--border-default) 1px,
    transparent 1px
  );
  background-size: 24px 24px;
}

/* Grid Pattern Background */
.grid-pattern {
  background-image:
    linear-gradient(var(--border-default) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-default) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Floating Animation */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

/* Pulse Ring */
@keyframes pulseRing {
  0% {
    transform: scale(0.8);
    opacity: 1;
  }
  100% {
    transform: scale(2);
    opacity: 0;
  }
}

.pulse-ring {
  position: relative;
}

.pulse-ring::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  border: 2px solid var(--accent-primary);
  animation: pulseRing 2s ease-out infinite;
}

/* ============================================
   12. UTILITY CLASSES
   ============================================ */

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

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-primary); }

/* Spacing Utilities */
.mt-0 { margin-top: var(--space-0); }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }
.mt-20 { margin-top: var(--space-20); }
.mt-24 { margin-top: var(--space-24); }
.mt-32 { margin-top: var(--space-32); }

.mb-0 { margin-bottom: var(--space-0); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }
.mb-20 { margin-bottom: var(--space-20); }
.mb-24 { margin-bottom: var(--space-24); }
.mb-32 { margin-bottom: var(--space-32); }

/* Visibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* GPU Acceleration */
.gpu {
  transform: translateZ(0);
  will-change: transform;
}

/* ============================================
   13. CURSOR SYSTEM
   ============================================ */
.cursor-glow {
  position: fixed;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(0, 240, 255, 0.08) 0%,
    transparent 70%
  );
  pointer-events: none;
  z-index: var(--z-max);
  transform: translate(-50%, -50%);
  transition: opacity 0.3s ease;
  mix-blend-mode: screen;
}

.cursor-glow--hidden {
  opacity: 0;
}

/* ============================================
   14. LOADING STATES
   ============================================ */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-secondary) 25%,
    var(--bg-tertiary) 50%,
    var(--bg-secondary) 75%
  );
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

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

/* ============================================
   15. TOOLTIP
   ============================================ */
.tooltip {
  position: relative;
}

.tooltip__content {
  position: absolute;
  bottom: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-smooth),
              transform var(--duration-normal) var(--ease-cinematic);
  z-index: var(--z-tooltip);
}

.tooltip:hover .tooltip__content {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}