/* ICL Landing Page - Modern Dark Theme */

:root {
  --bg-primary: #0a0f0f;
  --bg-secondary: #0f1515;
  --bg-card: #141c1c;
  --bg-elevated: #1a2424;
  --text-primary: #e8eeee;
  --text-secondary: #9aacac;
  --text-muted: #6a7a7a;
  --accent: #14b8a6;
  --accent-light: #5eead4;
  --accent-glow: rgba(20, 184, 166, 0.35);
  --border: #243333;
  --border-light: #324444;
  --code-bg: #0a1010;
  --success: #22c55e;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', Consolas, monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

a {
  color: var(--accent-light);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

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

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

.nav-github {
  background: var(--bg-elevated);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
}

/* Hero */
.hero {
  position: relative;
  padding: 8rem 0 5rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent);
  pointer-events: none;
}

/* Floating Parentheses Canvas */
#parens-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-top: 1.5rem;
  line-height: 1.6;
}

.hero-lisps {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  font-family: var(--font-mono);
}

/* Hero Terminal Preview */
.hero-terminal {
  margin-top: 3rem;
  background: #1e1e2e;
  border: 1px solid #444;
  border-radius: var(--radius);
  overflow: hidden;
  text-align: left;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255,255,255,0.05);
}

.terminal-header {
  background: #2a2a3a;
  padding: 0.75rem 1rem;
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid #444;
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27ca40; }

.terminal-body {
  padding: 1rem 1.25rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: #e0e0e0;
  background: #1e1e2e;
  overflow-x: auto;
}

.terminal-body .prompt {
  color: var(--success);
}

.terminal-body .comment {
  color: var(--text-muted);
}

.terminal-body .string {
  color: #a5d6ff;
}

.terminal-body .result {
  color: var(--accent-light);
}

.terminal-body .cursor {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.hero-badges img {
  height: 20px;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  color: white;
}

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

.btn-ghost:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border-color: var(--border-light);
}

.btn-small {
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  background: var(--accent);
  color: white;
  border-radius: 8px;
}

.btn-small:hover {
  background: var(--accent-light);
  color: white;
}

.btn-icon {
  font-size: 1.1rem;
}

/* Section Titles */
.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.02em;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Modes Section */
.modes {
  padding: 6rem 0;
  background: var(--bg-secondary);
}

.modes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.mode-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all 0.3s;
}

.mode-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.mode-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.mode-icon {
  font-size: 1.5rem;
}

.mode-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.mode-demo {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
}

.mode-demo img {
  width: 100%;
  display: block;
}

.mode-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.mode-cmd {
  display: inline-block;
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--success);
}

/* Emacs placeholder */
.emacs-demo {
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.emacs-placeholder {
  padding: 1.5rem;
  width: 100%;
}

.emacs-placeholder pre {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.emacs-comment {
  color: var(--text-muted);
}

.emacs-fn {
  color: var(--accent-light);
}

/* Showcase Section */
.showcase {
  padding: 6rem 0;
}

.showcase-item {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: center;
}

.showcase-content h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.showcase-content p {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.showcase-content code {
  display: inline-block;
  background: var(--code-bg);
  border: 1px solid var(--border);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--success);
}

.showcase-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}

.showcase-media img {
  width: 100%;
  display: block;
}

/* Features Section */
.features {
  padding: 6rem 0;
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 3rem;
}

.feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: border-color 0.2s;
}

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

.feature-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.feature h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Install Section */
.install {
  padding: 6rem 0;
}

.install-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.install-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.install-card h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.install-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.install-card pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
}

.install-card code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-primary);
}

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

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-logo {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
}

.footer-tagline {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-copyright {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 1024px) {
  .modes-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

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

  .install-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
  }

  .showcase-item {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 8rem 0 4rem;
  }

  .nav-links a:not(.nav-github) {
    display: none;
  }

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

  .footer-content {
    flex-direction: column;
    gap: 1.5rem;
    text-align: center;
  }

  .footer-brand {
    flex-direction: column;
    gap: 0.5rem;
  }
}