/* exts.dev — Design System v2: Focused Precision */

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

/* Colors & Variables */
:root {
  /* Background with depth */
  --bg-primary: #050505;
  --bg-secondary: #0a0a0a;
  --bg-card: #0f0f0f;
  --bg-card-hover: #141414;

  /* Text hierarchy */
  --text-primary: #fafafa;
  --text-secondary: #a0a0a0;
  --text-muted: #505050;

  /* Accent: Lime Neon */
  --accent: #BEFF00;
  --accent-dim: #9acc00;
  --accent-glow: rgba(190, 255, 0, 0.12);
  --accent-glow-strong: rgba(190, 255, 0, 0.25);

  /* Borders */
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --border-accent: rgba(190, 255, 0, 0.3);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 5rem;
  --space-4xl: 8rem;

  /* Container */
  --container-max: 1100px;
  --container-padding: 1.5rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-normal: 300ms var(--ease-out);
  --transition-slow: 500ms var(--ease-out);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* Typography */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Geist', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Noise texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 1000;
}

h1, h2, h3, h4 {
  font-family: 'Satoshi', sans-serif;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  letter-spacing: -0.03em;
}

h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }

code, .mono {
  font-family: 'Geist Mono', 'SF Mono', Consolas, monospace;
}

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

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

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

/* Layout */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(5, 5, 5, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__logo {
  font-family: 'Geist Mono', monospace;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
}

.header__logo:hover {
  color: var(--accent);
}

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

.header__link {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

/* Hero */
.hero {
  padding: var(--space-4xl) 0 var(--space-3xl);
  text-align: center;
  position: relative;
}

/* Hero gradient glow */
.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.6;
}

.hero__title {
  margin-bottom: var(--space-lg);
  position: relative;
  animation: fadeInUp 0.8s var(--ease-out) both;
}

.hero__subtitle {
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 420px;
  margin: 0 auto;
  animation: fadeInUp 0.8s var(--ease-out) 0.1s both;
}

/* Filters */
.filters {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s var(--ease-out) 0.2s both;
}

.filter-btn {
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  font-family: 'Geist', sans-serif;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-secondary);
}

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-primary);
  font-weight: 600;
}

/* Grid */
.grid {
  display: grid;
  gap: var(--space-md);
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

/* Card */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-normal);
  text-decoration: none;
  display: block;
  position: relative;
  overflow: hidden;
}

/* Card glow effect on hover */
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, var(--accent-glow) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  transform: translateY(-4px);
}

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

.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-md);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: var(--bg-secondary);
  position: relative;
  z-index: 1;
  object-fit: contain;
}

.card__title {
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
  position: relative;
  z-index: 1;
}

.card__category {
  color: var(--accent);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
  z-index: 1;
}

.card__description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-top: var(--space-sm);
  line-height: 1.5;
  position: relative;
  z-index: 1;
}

.card--coming-soon {
  opacity: 0.4;
  cursor: default;
}

.card--coming-soon:hover {
  transform: none;
  border-color: var(--border);
  background: var(--bg-card);
}

.card--coming-soon:hover::before {
  opacity: 0;
}

/* Staggered animation for cards */
.grid .card:nth-child(1) { animation: fadeInUp 0.6s var(--ease-out) 0.3s both; }
.grid .card:nth-child(2) { animation: fadeInUp 0.6s var(--ease-out) 0.4s both; }
.grid .card:nth-child(3) { animation: fadeInUp 0.6s var(--ease-out) 0.5s both; }
.grid .card:nth-child(4) { animation: fadeInUp 0.6s var(--ease-out) 0.6s both; }

/* Extension Page */
.ext-hero {
  padding: var(--space-3xl) 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.ext-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 300px;
  background: radial-gradient(ellipse at 30% 0%, var(--accent-glow) 0%, transparent 50%);
  pointer-events: none;
}

.ext-hero__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  position: relative;
}

@media (min-width: 768px) {
  .ext-hero__inner {
    flex-direction: row;
    align-items: center;
    gap: var(--space-2xl);
  }
}

.ext-hero__icon {
  width: 88px;
  height: 88px;
  border-radius: var(--radius-xl);
  object-fit: contain;
  flex-shrink: 0;
  background: var(--bg-card);
  box-shadow: 0 0 60px var(--accent-glow-strong);
  animation: fadeInUp 0.6s var(--ease-out) both;
}

.ext-hero__content {
  flex: 1;
  animation: fadeInUp 0.6s var(--ease-out) 0.1s both;
}

.ext-hero__title {
  margin-bottom: var(--space-sm);
}

.ext-hero__tagline {
  color: var(--text-secondary);
  font-size: 1.125rem;
  margin-bottom: var(--space-lg);
}

.ext-hero__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-md);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  font-family: 'Geist', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  position: relative;
}

.btn--primary {
  background: var(--accent);
  color: var(--bg-primary);
  box-shadow: 0 0 20px var(--accent-glow-strong);
}

.btn--primary:hover {
  background: var(--text-primary);
  color: var(--bg-primary);
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

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

.btn--secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Sections */
.section {
  padding: var(--space-3xl) 0;
}

.section + .section {
  border-top: 1px solid var(--border);
}

.section__title {
  color: var(--text-muted);
  font-family: 'Geist Mono', monospace;
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-lg);
}

.section__content {
  color: var(--text-secondary);
  max-width: 560px;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.section__content p + p {
  margin-top: var(--space-md);
}

.section__content strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Features */
.features {
  display: grid;
  gap: var(--space-sm);
}

.feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
}

.feature__check {
  color: var(--accent);
  flex-shrink: 0;
  font-size: 1rem;
}

.feature__text {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Footer */
.footer {
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--border);
  margin-top: var(--space-3xl);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  text-align: center;
}

@media (min-width: 768px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

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

.footer__links {
  display: flex;
  gap: var(--space-lg);
}

.footer__link {
  color: var(--text-muted);
  font-size: 0.8125rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

/* Legal Pages */
.legal {
  padding: var(--space-3xl) 0;
  max-width: 680px;
  margin: 0 auto;
}

.legal h1 {
  margin-bottom: var(--space-xl);
  font-size: 2.5rem;
}

.legal h2 {
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  font-size: 1.25rem;
}

.legal p {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.legal ul {
  color: var(--text-secondary);
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
}

.legal li {
  margin-bottom: var(--space-sm);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.legal code {
  background: var(--bg-card);
  padding: 0.125em 0.375em;
  border-radius: 4px;
  font-size: 0.85em;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}