/* ============================================================
   VARIABLES
   ============================================================ */
:root {
  --bg-base: #0d1117;
  --bg-surface: #161b27;
  --bg-elevated: #1e2535;
  --bg-card: #161d2e;

  --accent: #00d4aa;
  --accent-dim: rgba(0, 212, 170, 0.12);
  --accent-glow: rgba(0, 212, 170, 0.07);
  --accent-border: rgba(0, 212, 170, 0.28);

  --text-primary: #e4e8f0;
  --text-secondary: #7e8da0;
  --text-muted: #4a5568;
  --text-code: #9ecfbf;

  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --transition: 180ms ease;
  --transition-slow: 320ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: 1100px;
  margin-inline: auto;
  padding-inline: 1.5rem;
}

/* ============================================================
   SECTION LABELS & TITLES
   ============================================================ */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 54ch;
  margin-bottom: 3rem;
}

/* ============================================================
   GLASS CARD
   ============================================================ */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: opacity 0.5s ease, transform 0.5s ease, border-color var(--transition), box-shadow var(--transition);
}

.glass-card:hover {
  border-color: var(--accent-border);
  box-shadow: 0 0 28px var(--accent-glow), 0 4px 24px rgba(0,0,0,0.3);
  transform: translateY(-2px);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6875rem 1.375rem;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #06120f;
}

.btn-primary:hover {
  background: #00e8bb;
  box-shadow: 0 0 20px rgba(0, 212, 170, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

.btn-outline:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.navbar__logo {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.02em;
}

.navbar__logo span {
  color: var(--text-muted);
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.navbar__links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.navbar__links .nav-cta {
  color: var(--accent);
  border: 1px solid var(--accent-border);
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  transition: background var(--transition), color var(--transition);
}

.navbar__links .nav-cta:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  padding: 7rem 0 5rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -5%, rgba(0, 212, 170, 0.11) 0%, transparent 60%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  max-width: 760px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3125rem 0.875rem;
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 1.75rem;
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.hero__headline {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero__accent {
  color: var(--accent);
}

.hero__subtext {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 52ch;
  margin-bottom: 2.25rem;
  line-height: 1.7;
}

.hero__subtext code {
  color: var(--text-code);
  background: var(--bg-elevated);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

.hero__install {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--text-code);
  margin-bottom: 2rem;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.hero__install:hover {
  border-color: var(--accent-border);
  background: var(--bg-card);
}

.hero__install-prefix {
  color: var(--text-muted);
  user-select: none;
}

.hero__copy {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0;
  line-height: 1;
  transition: color var(--transition);
  font-family: var(--font-mono);
}

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

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ============================================================
   WHY SECTION
   ============================================================ */
.why {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

@media (max-width: 720px) {
  .why-grid {
    grid-template-columns: 1fr;
  }
}

.why-card {
  padding: 1.75rem;
}

.why-card__pills {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.625rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.pill--future {
  background: rgba(248, 113, 113, 0.12);
  color: #f87171;
  border: 1px solid rgba(248, 113, 113, 0.25);
}

.pill--cont {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--accent-border);
}

.pill-arrow {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.why-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.875rem;
  color: var(--text-primary);
}

.why-card__problem {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.625rem;
  padding-left: 0.875rem;
  border-left: 2px solid rgba(248, 113, 113, 0.4);
  line-height: 1.6;
}

.why-card__solution {
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding-left: 0.875rem;
  border-left: 2px solid var(--accent-border);
  line-height: 1.6;
}

.why-card__solution code, .why-card__problem code {
  color: var(--text-code);
  background: var(--bg-elevated);
  padding: 0.1em 0.3em;
  border-radius: 3px;
}

/* ============================================================
   FEATURES
   ============================================================ */
.features {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.feature-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.feature-card code {
  color: var(--text-code);
}

/* ============================================================
   CODE SHOWCASE
   ============================================================ */
.showcase {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.showcase__panel {
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.showcase__panel:hover {
  transform: none;
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  padding: 0 0.5rem;
  gap: 0;
  background: var(--bg-elevated);
}

.tab-btn {
  background: none;
  border: none;
  padding: 0.875rem 1.25rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  position: relative;
  transition: color var(--transition);
  white-space: nowrap;
}

.tab-btn::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}

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

.tab-btn.active {
  color: var(--accent);
}

.tab-btn.active::after {
  transform: scaleX(1);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.tab-panel pre {
  margin: 0 !important;
  padding: 1.75rem !important;
  background: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  font-size: 0.875rem !important;
  line-height: 1.7 !important;
  overflow-x: auto;
}

/* Override Prism tomorrow theme background */
.tab-panel pre[class*="language-"] {
  background: transparent !important;
}

/* ============================================================
   GET STARTED
   ============================================================ */
.get-started {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.step {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

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

.step:nth-child(2) { transition-delay: 0.08s; }
.step:nth-child(3) { transition-delay: 0.16s; }

.step__number {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--accent-dim);
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: 0.25rem;
}

.step__content {
  flex: 1;
}

.step__content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.625rem;
  color: var(--text-primary);
}

.step__content pre {
  background: var(--bg-elevated) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius-md) !important;
  padding: 1rem 1.25rem !important;
  font-size: 0.875rem !important;
  line-height: 1.6 !important;
  overflow-x: auto;
  margin: 0 !important;
}

.get-started__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer__logo {
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--accent);
}

.footer__version {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 0.125rem 0.5rem;
  border-radius: 100px;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.footer__tagline {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ============================================================
   SCROLL-REVEAL
   ============================================================ */
.glass-card {
  opacity: 0;
  transform: translateY(16px);
}

.glass-card.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
  .hero {
    padding: 4.5rem 0 3.5rem;
  }

  .hero__headline {
    font-size: 2.25rem;
  }

  .navbar__links {
    gap: 1rem;
  }

  .navbar__links a:not(.nav-cta):not(:last-child) {
    display: none;
  }

  .why-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .step {
    flex-direction: column;
    gap: 0.75rem;
  }
}

@media (max-width: 480px) {
  .tabs {
    overflow-x: auto;
  }

  .hero__install {
    font-size: 0.85rem;
  }
}

/* ============================================================
   PRISM OVERRIDES
   ============================================================ */
code[class*="language-"],
pre[class*="language-"] {
  font-family: var(--font-mono) !important;
}