/* ===== CSS Variables (Fresh/Clean Theme) ===== */
:root {
  --color-primary: #4a9eff;
  --color-primary-light: #e8f2ff;
  --color-primary-dark: #2b7de9;
  --color-accent: #ff6b6b;
  --color-bg: #ffffff;
  --color-bg-soft: #f8fafb;
  --color-bg-muted: #f0f4f8;
  --color-text: #2c3e50;
  --color-text-light: #6a7c8e;
  --color-text-muted: #94a3b8;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-code-bg: #f6f8fa;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --max-width: 1200px;
  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

img {
  max-width: 100%;
  display: block;
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-primary-dark);
}

/* ===== Header / Navigation ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
}

.header-inner {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
}

.logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.logo span {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-light);
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

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

.nav-github svg {
  width: 20px;
  height: 20px;
}

/* ===== Hero Section ===== */
.hero {
  text-align: center;
  padding: 80px 24px 60px;
  background: linear-gradient(180deg, var(--color-bg-soft) 0%, var(--color-bg) 100%);
}

.hero-logo {
  width: 120px;
  height: 120px;
  margin: 0 auto 24px;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.hero-badges img {
  display: inline-block;
  height: 22px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(74, 158, 255, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(74, 158, 255, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* ===== Features Section ===== */
.features {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px;
}

.features h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  background: var(--color-bg);
  transition: all 0.25s ease;
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===== Compatibility Table Section ===== */
.compatibility {
  background: var(--color-bg-soft);
  padding: 80px 24px;
}

.compatibility-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.compatibility h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 48px;
}

.compat-table {
  max-width: 600px;
  margin: 0 auto;
  border-collapse: collapse;
  width: 100%;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.compat-table th,
.compat-table td {
  padding: 12px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.compat-table th {
  background: var(--color-bg-muted);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.compat-table td {
  font-size: 0.95rem;
}

.compat-table tr:last-child td {
  border-bottom: none;
}

/* ===== Examples Section ===== */
.examples {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px;
}

.examples h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.examples .subtitle {
  text-align: center;
  color: var(--color-text-light);
  margin-bottom: 48px;
}

.code-example {
  max-width: 800px;
  margin: 0 auto;
  background: #1e293b;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: #0f172a;
}

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

.code-dot.red { background: #ef4444; }
.code-dot.yellow { background: #f59e0b; }
.code-dot.green { background: #10b981; }

.code-example pre {
  padding: 20px 24px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.7;
}

.code-example code {
  background: transparent;
  color: #e2e8f0;
  padding: 0;
  border-radius: 0;
  font-size: inherit;
}

/* Syntax colors */
.code-example .kw { color: #c084fc; }
.code-example .fn { color: #60a5fa; }
.code-example .str { color: #86efac; }
.code-example .cm { color: #64748b; }
.code-example .mac { color: #fbbf24; }
.code-example .ty { color: #67e8f9; }

/* ===== Projects Section ===== */
.projects {
  background: var(--color-bg-soft);
  padding: 80px 24px;
}

.projects-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.projects h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 48px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.project-card {
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
  background: var(--color-bg);
  transition: all 0.2s ease;
}

.project-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.project-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.project-card h3 a {
  color: var(--color-text);
}

.project-card h3 a:hover {
  color: var(--color-primary);
}

.project-card p {
  color: var(--color-text-light);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--color-border-light);
  padding: 32px 24px;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--color-text-light);
}

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

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 12px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero .tagline {
    font-size: 1.05rem;
  }

  .nav-links {
    gap: 4px;
  }

  .nav-links a {
    padding: 6px 10px;
    font-size: 0.9rem;
  }

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

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

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