/* ============================================================
   Free Claude Code Gateway — style.css
   Cyber-terminal aesthetic: deep space + electric cyan
   ============================================================ */

/* ---------- Custom Properties ---------- */
:root {
  --bg: #000000;
  --bg-secondary: #0a0a0a;
  --bg-card: #111111;
  --bg-code: #18181b;
  --border: #27272a;
  --border-accent: #3f3f46;
  --text: #fafafa;
  --text-muted: #a1a1aa;
  --text-code: #e4e4e7;
  --accent: #ffffff;
  --accent-hover: #d4d4d8;
  --accent-glow: rgba(255, 255, 255, 0.05);
  --accent-glow-strong: rgba(255, 255, 255, 0.1);
  --accent-green: #10b981;
  --accent-yellow: #f59e0b;
  --accent-purple: #8b5cf6;
  --radius: 8px;
  --radius-lg: 12px;
  --nav-height: 64px;
  --font-body: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --glow-sm: 0 4px 12px rgba(0, 0, 0, 0.1);
  --glow-md: 0 8px 24px rgba(0, 0, 0, 0.15);
  --glow-lg: 0 12px 32px rgba(0, 0, 0, 0.2);
}

[data-theme="light"] {
  --bg: #ffffff;
  --bg-secondary: #fafafa;
  --bg-card: #ffffff;
  --bg-code: #f4f4f5;
  --border: #e4e4e7;
  --border-accent: #d4d4d8;
  --text: #09090b;
  --text-muted: #71717a;
  --text-code: #18181b;
  --accent: #000000;
  --accent-hover: #27272a;
  --accent-glow: rgba(0, 0, 0, 0.03);
  --accent-glow-strong: rgba(0, 0, 0, 0.06);
  --glow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --glow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --glow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #ffffff;
    --bg-secondary: #fafafa;
    --bg-card: #ffffff;
    --bg-code: #f4f4f5;
    --border: #e4e4e7;
    --border-accent: #d4d4d8;
    --text: #09090b;
    --text-muted: #71717a;
    --text-code: #18181b;
    --accent: #000000;
    --accent-hover: #27272a;
    --accent-glow: rgba(0, 0, 0, 0.03);
    --accent-glow-strong: rgba(0, 0, 0, 0.06);
    --glow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --glow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --glow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  }
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  margin: 0;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition), color var(--transition);
  overflow-x: hidden;
}

/* Animated grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

[data-theme="light"] body::before {
  background-image:
    linear-gradient(rgba(2, 132, 199, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(2, 132, 199, 0.05) 1px, transparent 1px);
}

h1, h2, h3, h4 {
  line-height: 1.2;
  margin-top: 0;
  font-family: var(--font-mono);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--text);
  position: relative;
  text-align: center;
}

h2::after {
  content: '';
  display: block;
  width: 3rem;
  height: 2px;
  background: var(--accent);
  margin-top: 0.75rem;
  margin-left: auto;
  margin-right: auto;
  box-shadow: var(--glow-sm);
  border-radius: 2px;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

p {
  margin: 0 0 1rem;
  color: var(--text-muted);
}

p:last-child {
  margin-bottom: 0;
}

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

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

code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--bg-code);
  color: var(--text-code);
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid var(--border);
}

ul, ol {
  margin: 0;
  padding: 0;
}

img {
  max-width: 100%;
  height: auto;
}

/* ---------- Focus ---------- */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
  box-shadow: var(--glow-sm);
}

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--accent);
  color: #000;
  padding: 8px 16px;
  border-radius: var(--radius);
  z-index: 9999;
  font-weight: 700;
  font-family: var(--font-mono);
  transition: top var(--transition);
}

.skip-link:focus {
  top: 1rem;
}

/* ---------- Screen-reader only ---------- */
.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;
}

/* ---------- Layout ---------- */
section {
  padding: 5rem 0;
  position: relative;
  z-index: 1;
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s cubic-bezier(0.4,0,0.2,1), transform 0.6s cubic-bezier(0.4,0,0.2,1);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }
.reveal-delay-5 { transition-delay: 0.40s; }
.reveal-delay-6 { transition-delay: 0.48s; }

/* ---------- Navigation ---------- */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(3, 7, 18, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

[data-theme="light"] header {
  background: rgba(240, 246, 255, 0.9);
}

header.nav--scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 1px 0 var(--border), 0 4px 32px rgba(0, 212, 255, 0.06);
}

nav {
  height: var(--nav-height);
}

.nav-inner {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  gap: 1rem;
}

.nav-logo {
  font-weight: 700;
  font-size: 0.95rem;
  font-family: var(--font-mono);
  color: var(--accent);
  white-space: nowrap;
  letter-spacing: 0.04em;
  text-shadow: var(--glow-sm);
}

.nav-logo::before {
  content: '> ';
  opacity: 0.5;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.125rem;
  list-style: none;
  flex-wrap: nowrap;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  font-family: var(--font-body);
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition), box-shadow var(--transition);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-glow);
  box-shadow: inset 0 0 0 1px var(--border);
}

.nav-github {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.star-count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-yellow);
  background: rgba(255, 215, 0, 0.08);
  border: 1px solid rgba(255, 215, 0, 0.2);
  padding: 2px 8px;
  border-radius: 100px;
}

.theme-toggle {
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  flex-shrink: 0;
  touch-action: manipulation;
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 100px;
  box-shadow: var(--glow-sm);
}

.theme-toggle__track {
  position: relative;
  display: flex;
  align-items: center;
  width: 52px;
  height: 28px;
  border-radius: 100px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.3);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.theme-toggle:hover .theme-toggle__track {
  border-color: var(--accent);
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.3), var(--glow-sm);
}

/* Thumb slides right in dark mode (default), left in light mode */
.theme-toggle__thumb {
  position: absolute;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1e3a5f, #0a1628);
  border: 1px solid var(--border-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  transition: transform var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition);
  box-shadow: 0 1px 4px rgba(0,0,0,0.4), 0 0 8px rgba(0,212,255,0.15);
}

/* Thumb sits right in dark mode, left in light mode */
[data-theme="dark"] .theme-toggle__thumb,
:root:not([data-theme="light"]) .theme-toggle__thumb {
  transform: translateX(24px);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .theme-toggle__thumb {
    transform: translateX(0);
  }
}

[data-theme="light"] .theme-toggle__thumb {
  transform: translateX(0);
  background: linear-gradient(135deg, #fff8e1, #fffde7);
  border-color: #bfdbfe;
  color: #d97706;
  box-shadow: 0 1px 4px rgba(0,0,0,0.15), 0 0 8px rgba(2,132,199,0.12);
}

[data-theme="light"] .theme-toggle__track {
  background: #e4eeff;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

/* Show sun when in dark mode (click will go to light), moon when in light mode */
.icon-sun { display: block; }
.icon-moon { display: none; }

[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

.hamburger {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px 8px;
  align-items: center;
  justify-content: center;
  touch-action: manipulation;
  transition: color var(--transition), border-color var(--transition), box-shadow var(--transition);
  flex-shrink: 0;
}

.hamburger:hover {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: var(--glow-sm);
}

/* ---------- Mobile menu ---------- */
.mobile-menu {
  display: none;
  position: absolute;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(6, 13, 31, 0.98);
  border-top: 1px solid var(--border);
  padding: 1rem 24px;
  backdrop-filter: blur(20px);
}

[data-theme="light"] .mobile-menu {
  background: rgba(228, 238, 255, 0.98);
}

.mobile-menu.open {
  display: block;
  animation: slideDown 0.2s cubic-bezier(0.4,0,0.2,1);
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-menu a {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font-body);
  padding: 10px 12px;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
  letter-spacing: -0.01em;
}

.mobile-menu a:hover {
  color: var(--accent);
  background: var(--accent-glow);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.875rem;
  font-family: var(--font-mono);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  touch-action: manipulation;
  white-space: nowrap;
  letter-spacing: 0.04em;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.06) 50%, transparent 100%);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

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

.btn:hover {
  transform: translateY(-2px);
}

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

.btn-primary {
  background: var(--text);
  color: var(--bg);
  box-shadow: var(--glow-sm);
}

.btn-primary:hover {
  background: var(--text-muted);
  color: var(--bg);
  box-shadow: var(--glow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: inset 0 0 0 0 var(--accent-glow);
}

.btn-secondary:hover {
  background: var(--accent-glow);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--glow-sm);
}

.btn-buy {
  background: var(--text);
  color: var(--bg);
  padding: 14px 32px;
  font-size: 0.95rem;
  box-shadow: var(--glow-md);
  border: 1px solid transparent;
}

.btn-buy:hover {
  background: var(--text-muted);
  color: var(--bg);
  box-shadow: var(--glow-lg);
}

/* ---------- Hero ---------- */
#hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
}

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.55;
}

#hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
  z-index: 1;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  position: relative;
  z-index: 2;
  padding: 4rem 24px;
  margin-top: auto;
  margin-bottom: auto;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  padding: 6px 14px;
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 100px;
  background: rgba(0, 212, 255, 0.06);
  animation: pulseGlow 3s ease-in-out infinite;
}

.hero-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0); }
  50% { box-shadow: 0 0 16px rgba(0, 212, 255, 0.15); }
}

#hero h1 {
  font-size: clamp(2rem, 8vw, 5rem);
  font-weight: 800;
  word-break: break-word;
  line-height: 1.05;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
  font-family: var(--font-mono);
}

.hero-title-main {
  display: block;
  background: linear-gradient(135deg, #ffffff 0%, var(--accent) 60%, #a855f7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 32px rgba(0, 212, 255, 0.25));
}

[data-theme="light"] .hero-title-main {
  background: linear-gradient(135deg, #0a1628 0%, var(--accent) 60%, #7c3aed 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 1.5rem;
  line-height: 1.7;
  font-family: var(--font-body);
}

.hero-badge {
  display: inline-block;
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 100px;
  padding: 7px 18px;
  font-size: 0.8rem;
  color: var(--accent);
  margin-bottom: 2.5rem;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
  background: rgba(0, 212, 255, 0.05);
  box-shadow: inset 0 0 20px rgba(0, 212, 255, 0.04);
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 3.5rem;
}

.ascii-diagram {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  overflow-x: auto;
  text-align: left;
  color: var(--text-code);
  margin: 0 auto 2.5rem;
  max-width: 100%;
  line-height: 1.5;
  white-space: pre;
  box-shadow: var(--glow-sm), inset 0 0 40px rgba(0, 212, 255, 0.03);
  position: relative;
}

.ascii-diagram::before {
  content: '● ● ●';
  position: absolute;
  top: 10px;
  left: 14px;
  font-size: 0.6rem;
  color: var(--border-accent);
  letter-spacing: 4px;
}

.hero-badges-row {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
  filter: brightness(1.1);
}

.hero-stars {
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: var(--accent-yellow);
  min-height: 1.5rem;
  text-shadow: 0 0 12px rgba(255, 215, 0, 0.4);
}

/* ---------- Features ---------- */
#features {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.features-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.25rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1 1 280px;
  max-width: 360px;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--glow-md);
}

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

.feature-icon {
  width: 36px;
  height: 36px;
  color: var(--accent);
  margin: 0 auto 1rem;
  display: block;
  filter: drop-shadow(0 0 6px rgba(0, 212, 255, 0.4));
}

.feature-card h3 {
  color: var(--text);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}

.feature-card p {
  font-size: 0.875rem;
  line-height: 1.65;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2.5rem;
}

.badge {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 5px 14px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  transition: border-color var(--transition), color var(--transition), box-shadow var(--transition);
  letter-spacing: 0.04em;
}

.badge:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--glow-sm);
}

/* ---------- How It Works ---------- */
.steps-list {
  list-style: none;
  padding: 0;
  counter-reset: steps;
  max-width: 640px;
  margin: 0 auto;
}

.steps-list li {
  counter-increment: steps;
  padding-left: 3.5rem;
  position: relative;
  margin-bottom: 2rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.steps-list li::before {
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  color: var(--text);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  box-shadow: var(--glow-sm);
  z-index: 1;
}

.steps-list li:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 0.95rem;
  top: 2.25rem;
  height: calc(100% - 0.5rem);
  width: 2px;
  background: var(--border);
  z-index: 0;
}

.steps-list li code {
  font-size: 0.82em;
}

.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 3rem 0 0;
}

.flow-node {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.75rem;
  text-align: center;
  min-width: 150px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text);
  font-size: 0.875rem;
  line-height: 1.4;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.flow-node:hover {
  border-color: var(--border-accent);
  box-shadow: var(--glow-md);
}

.flow-node small {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 400;
  margin-top: 4px;
}

.flow-node--gateway {
  border-color: var(--accent);
  background: var(--accent-glow);
  color: var(--accent);
  box-shadow: var(--glow-sm);
}

.flow-arrow {
  font-size: 1.25rem;
  color: var(--accent);
  font-weight: 300;
  opacity: 0.7;
  text-shadow: var(--glow-sm);
}

/* ---------- Providers ---------- */
#providers {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.providers-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.provider-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1 1 280px;
  max-width: 360px;
}

.provider-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.provider-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--glow-sm);
}

.provider-card:hover::after {
  opacity: 1;
}

.provider-card h3 {
  color: var(--text);
  margin-bottom: 0.375rem;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
}

.provider-card p {
  font-size: 0.8rem;
  margin: 0;
}

.provider-url {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-code);
  background: var(--bg-code);
  padding: 3px 8px;
  border-radius: 4px;
  display: inline-block;
  margin: 0.375rem 0 0.5rem;
  word-break: break-all;
  border: 1px solid var(--border);
}

.providers-note {
  margin-top: 2rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: center;
  font-style: italic;
}

/* ---------- Quick Start ---------- */
#quick-start .section-inner {
  max-width: 800px;
}

.step-label {
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--accent);
  margin: 2rem 0 0.75rem;
  letter-spacing: 0.04em;
}

.step-label:first-of-type {
  margin-top: 0;
}

.code-block-wrapper {
  position: relative;
  margin: 1.5rem 0;
}

.code-block-wrapper pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 3.5rem 1.5rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  overflow-x: auto;
  color: var(--text-code);
  margin: 0;
  line-height: 1.75;
  box-shadow: inset 0 0 20px rgba(0, 212, 255, 0.02);
}

.code-block-wrapper pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
  color: inherit;
  border: none;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px;
  cursor: pointer;
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
  touch-action: manipulation;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.copy-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-glow);
  box-shadow: var(--glow-sm);
}

.copy-btn.copied {
  color: var(--accent-green);
  border-color: var(--accent-green);
  background: rgba(0, 255, 163, 0.06);
  box-shadow: 0 0 12px rgba(0, 255, 163, 0.2);
}

/* ---------- Tabs ---------- */
.tabs {
  display: inline-flex;
  gap: 4px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
  margin-bottom: 1.5rem;
}

.tab-btn {
  background: none;
  border: none;
  padding: 6px 16px;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-family: var(--font-body);
  font-weight: 500;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
  margin-bottom: 0;
  letter-spacing: -0.01em;
}

.tab-btn:hover {
  color: var(--text);
  background: var(--accent-glow);
}

.tab-btn.active {
  color: var(--bg);
  background: var(--text);
  box-shadow: var(--glow-sm);
  text-shadow: none;
}

.tab-panel {
  margin-bottom: 1rem;
}

.tab-panel.hidden {
  display: none;
}

.quickstart-note {
  margin-top: 1.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-align: center;
}

/* ---------- Responsible Use ---------- */
#responsible-use {
  background: var(--bg);
}

.responsible-use-section {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin: 0 auto;
  max-width: 800px;
  box-shadow: var(--glow-sm);
  position: relative;
  overflow: hidden;
}

.responsible-use-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.responsible-use-section h2 {
  margin-bottom: 1.25rem;
}

.responsible-use-section > p {
  font-size: 0.9375rem;
  margin-bottom: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.buy-section {
  margin: 2rem 0;
  text-align: center;
  padding: 2rem;
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.buy-note {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.disclaimer {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  opacity: 0.6;
  font-family: var(--font-mono);
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  padding: 0;
}

.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 2rem 0;
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-item dt {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.75rem;
}

.faq-item dd {
  margin: 0;
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
}

/* ---------- Footer ---------- */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  justify-content: center;
}

.footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
}

.footer-col h4 {
  font-size: 0.7rem;
  font-weight: 600;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

.footer-col a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.footer-col a:hover {
  color: var(--accent);
}

.footer-col--wide {
  grid-column: 1 / -1;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  text-align: center;
}

.footer-disclaimer {
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.5;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
}

.footer-credit {
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.5;
  margin: 0;
  font-family: var(--font-mono);
}

/* ---------- Global transition overrides ---------- */
a, button, .feature-card, .provider-card, .badge, header {
  transition:
    background-color var(--transition),
    color var(--transition),
    border-color var(--transition),
    transform var(--transition),
    opacity var(--transition),
    box-shadow var(--transition);
}

/* ---------- Responsive: Tablet (max 1024px) ---------- */
@media (max-width: 1024px) {
  .nav-links li:not(:last-child) a:not(.nav-github) {
    display: none;
  }
}

/* ---------- Responsive: Tablet (max 900px) — show hamburger ---------- */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }
}

/* ---------- Responsive: Mobile (max 768px) ---------- */
@media (max-width: 768px) {  section {
    padding: 3.5rem 0;
  }

  #hero {
    justify-content: flex-start;
    padding-top: calc(var(--nav-height) + 3rem);
    min-height: auto;
    padding-bottom: 3rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 320px;
  }

  .ascii-diagram {
    font-size: 0.6rem;
    padding: 1.25rem 1rem;
  }

  .features-grid, .providers-grid {
    flex-direction: column;
    align-items: center;
  }

  .feature-card, .provider-card {
    max-width: 100%;
    width: 100%;
  }

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

  .flow-arrow {
    transform: rotate(90deg);
  }

  .responsible-use-section {
    padding: 1.5rem;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }

  .footer-col--wide {
    grid-column: 1 / -1;
  }
}

@media (max-width: 480px) {
  .footer-inner {
    grid-template-columns: 1fr;
  }

  h2 {
    font-size: 1.5rem;
  }

  .section-inner {
    padding: 0 16px;
  }

  .ascii-diagram::before {
    display: none;
  }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}