/* KotaDB - Liquid Glass Design System */

/* ===== Custom Properties ===== */
:root {
  /* Background colors - deeper black with blue tint */
  --color-bg: #0a0a0f;
  --color-bg-alt: #12121a;
  --color-surface: #16161f;
  
  /* Text colors */
  --color-text: #f4f4f5;
  --color-text-muted: #a1a1aa;
  
  /* Cyan accent palette */
  --color-primary: #22d3ee;
  --color-primary-hover: #67e8f9;
  --color-primary-muted: #0891b2;
  --color-primary-glow: rgba(34, 211, 238, 0.15);
  
  /* Glass effects */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 12px;
  
  /* Code blocks */
  --color-code-bg: #0f0f14;
  --color-code-text: #e5e7eb;
  --color-comment: #6b7280;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, Inter, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SF Mono", SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
  
  /* Sizing */
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 3rem;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Layout */
  --max-width: 72rem;
  --header-height: 4rem;
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  
  /* Animation */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease-out;
  --transition-slow: 300ms ease-out;
}

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

html { 
  font-size: 16px; 
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1, h2, h3, h4 { 
  font-weight: 600; 
  line-height: 1.2; 
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }

p { margin-bottom: var(--space-md); }

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

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

/* ===== Layout ===== */
.container { 
  width: 100%; 
  max-width: var(--max-width); 
  margin: 0 auto; 
  padding: 0 var(--space-lg); 
}

main { flex: 1; }

/* ===== Glass Panel Mixin ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
}

.glass-subtle {
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
}

/* ===== Header ===== */
.site-header {
  height: var(--header-height);
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container { 
  display: flex; 
  align-items: center; 
  justify-content: space-between; 
  height: 100%; 
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
}

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

.logo svg {
  height: 32px;
  width: auto;
}

.logo-text {
  letter-spacing: -0.5px;
}

.logo-text .accent {
  color: var(--color-primary);
}

/* Navigation */
.main-nav { 
  display: flex; 
  gap: var(--space-lg); 
}

.main-nav a { 
  color: var(--color-text-muted); 
  font-size: var(--font-size-sm); 
  font-weight: 500;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
}

.main-nav a:hover { 
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
}

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

/* Ambient glow behind hero */
.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, var(--color-primary-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero h1 { 
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  max-width: 38rem;
  margin: 0 auto var(--space-xl);
  line-height: 1.7;
}

.hero-actions { 
  display: flex; 
  gap: var(--space-md); 
  justify-content: center; 
  flex-wrap: wrap;
  margin-bottom: var(--space-3xl);
}

/* ===== Terminal Demo ===== */
.terminal-wrapper {
  max-width: 600px;
  margin: 0 auto;
  perspective: 1000px;
}

.terminal {
  background: var(--color-code-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: 
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 20px 50px -20px rgba(0, 0, 0, 0.5),
    0 0 100px -50px var(--color-primary-glow);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--glass-border);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
}

.terminal-dot:nth-child(1) { background: #ff5f56; }
.terminal-dot:nth-child(2) { background: #ffbd2e; }
.terminal-dot:nth-child(3) { background: #27ca40; }

.terminal-title {
  flex: 1;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.terminal-body {
  padding: var(--space-lg);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  line-height: 1.8;
  min-height: 180px;
}

.terminal-line {
  display: flex;
  align-items: flex-start;
  margin-bottom: var(--space-sm);
}

.terminal-prompt {
  color: var(--color-primary);
  margin-right: var(--space-sm);
  user-select: none;
}

.terminal-command {
  color: var(--color-text);
}

.terminal-output {
  color: var(--color-text-muted);
  padding-left: 1.2em;
}

.terminal-success {
  color: #27ca40;
}

.terminal-cursor {
  display: inline-block;
  width: 8px;
  height: 18px;
  background: var(--color-primary);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
  vertical-align: text-bottom;
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-primary { 
  background: var(--color-primary);
  color: #0a0a0f;
  box-shadow: 0 0 20px -5px var(--color-primary-glow);
}

.btn-primary:hover { 
  background: var(--color-primary-hover);
  color: #0a0a0f;
  transform: translateY(-1px);
  box-shadow: 0 0 30px -5px rgba(34, 211, 238, 0.3);
}

.btn-secondary { 
  background: var(--glass-bg);
  color: var(--color-text);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover { 
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.15);
}

/* ===== GitHub Stats Bar ===== */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  padding: var(--space-lg) var(--space-xl);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  max-width: 500px;
  margin: var(--space-2xl) auto 0;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.stat-item svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

.stat-value {
  color: var(--color-text);
  font-weight: 600;
}

.stat-item a {
  color: inherit;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.stat-item a:hover {
  color: var(--color-primary);
}

/* ===== Features Section ===== */
.features { 
  padding: var(--space-4xl) 0;
}

.features-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.features-header h2 {
  margin-bottom: var(--space-sm);
}

.features-header p {
  color: var(--color-text-muted);
  max-width: 32rem;
  margin: 0 auto;
}

.features-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); 
  gap: var(--space-lg); 
}

.feature {
  padding: var(--space-xl);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  transition: all var(--transition-base);
}

.feature:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px -20px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.feature-icon svg {
  width: 100%;
  height: 100%;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
}

.feature h3 { 
  font-size: var(--font-size-lg); 
  margin-bottom: var(--space-sm);
}

.feature p { 
  color: var(--color-text-muted); 
  font-size: var(--font-size-sm);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ===== Quick Start Section ===== */
.quickstart { 
  padding: var(--space-4xl) 0;
  background: var(--color-bg-alt);
}

.quickstart h2 { 
  text-align: center; 
  margin-bottom: var(--space-xl); 
}

.quickstart-code {
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Code Blocks ===== */
pre {
  background: var(--color-code-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-lg);
  overflow-x: auto;
  font-size: var(--font-size-sm);
}

code { 
  font-family: var(--font-mono); 
  color: var(--color-code-text); 
}

pre code { 
  display: block; 
  line-height: 1.8; 
}

.comment { color: var(--color-comment); }

:not(pre) > code {
  background: rgba(255, 255, 255, 0.06);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 4px;
  font-size: 0.9em;
}

/* ===== Footer ===== */
.site-footer { 
  padding: var(--space-xl) 0; 
  border-top: 1px solid var(--glass-border);
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-content p { 
  margin: 0; 
  color: var(--color-text-muted); 
  font-size: var(--font-size-sm); 
}

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

.footer-nav a { 
  color: var(--color-text-muted); 
  font-size: var(--font-size-sm); 
}

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

/* ===== Scroll Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}


/* ===== Creator Section ===== */
.creator {
  padding: var(--space-4xl) 0;
  background: var(--color-bg-alt);
}

.creator-content {
  text-align: center;
}

.creator-content h2 {
  margin-bottom: var(--space-sm);
}

.creator-content > p {
  color: var(--color-text-muted);
  max-width: 32rem;
  margin: 0 auto var(--space-xl);
}

.creator-ctas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
  max-width: 600px;
  margin: 0 auto;
}

.cta-card {
  display: block;
  padding: var(--space-xl);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-lg);
  text-decoration: none;
  transition: all var(--transition-base);
}

.cta-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 10px 40px -20px rgba(34, 211, 238, 0.2);
}

.cta-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.cta-card h3 {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.cta-card p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
  line-height: 1.6;
}
/* ===== Responsive ===== */
@media (max-width: 768px) {
  :root { 
    --font-size-4xl: 2.25rem; 
    --font-size-3xl: 1.75rem;
  }
  
  .hero { 
    padding: var(--space-3xl) 0; 
  }
  
  .hero::before {
    width: 400px;
    height: 300px;
  }
  
  .hero-subtitle { 
    font-size: var(--font-size-base); 
  }
  
  .stats-bar {
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-md);
  }
  
  .terminal-body {
    font-size: 12px;
    padding: var(--space-md);
  }
  
  
  .creator {
    padding: var(--space-3xl) 0;
  }
  
  .creator-ctas {
    grid-template-columns: 1fr;
  }
  .footer-content { 
    flex-direction: column; 
    text-align: center; 
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn {
    justify-content: center;
  }
}