/* DiLink-Auto GitHub Pages — Dark theme */
:root {
  --bg: #0d1117;
  --bg-elevated: #161b22;
  --bg-card: #1c2333;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --green: #3fb950;
  --pink: #f778ba;
  --pink-hover: #ff9bce;
  --pix: #00c2a0;
  --orange: #d2991d;
  --radius: 8px;
  --max-width: 960px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 24px; }
.logo-text { font-size: 18px; font-weight: 700; letter-spacing: -0.3px; }
.topbar-actions { display: flex; align-items: center; gap: 12px; }

.lang-picker select {
  background: var(--bg-card); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 6px 10px; font-size: 13px; cursor: pointer;
  appearance: auto;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 20px; border-radius: var(--radius);
  font-size: 14px; font-weight: 600; text-decoration: none;
  cursor: pointer; border: none; transition: all 0.15s;
}
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { filter: brightness(1.1); }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--bg-card); }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); }
.btn-pink { background: var(--pink); color: #0d1117; }
.btn-pink:hover { background: var(--pink-hover); }
.btn-pix { background: var(--pix); color: #0d1117; }
.btn-pix:hover { filter: brightness(1.1); }

/* Hero */
.hero {
  padding: 72px 0 56px; text-align: center;
  background: linear-gradient(180deg, rgba(88,166,255,0.06) 0%, transparent 60%);
}
.hero-badge { display: flex; justify-content: center; gap: 8px; margin-bottom: 24px; }
.badge-version, .badge-oss {
  font-size: 12px; font-weight: 600; padding: 4px 10px;
  border-radius: 20px;
}
.badge-version { background: rgba(88,166,255,0.15); color: var(--accent); }
.badge-oss { background: rgba(63,185,80,0.15); color: var(--green); }
.hero-title { font-size: 48px; font-weight: 800; letter-spacing: -1px; margin-bottom: 12px; }
.hero-subtitle { font-size: 20px; color: var(--text-muted); margin-bottom: 8px; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-desc { font-size: 16px; color: var(--text-muted); margin-bottom: 32px; max-width: 640px; margin-left: auto; margin-right: auto; }
.hero-cta { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* Sections */
section { padding: 64px 0; }
.section-title { font-size: 28px; font-weight: 700; text-align: center; margin-bottom: 40px; }

/* Features */
.features { border-top: 1px solid var(--border); }
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px; transition: border-color 0.15s;
}
.feature-card:hover { border-color: var(--accent); }
.feature-icon { font-size: 32px; margin-bottom: 12px; }
.feature-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-muted); }

/* How it works */
.how-it-works { background: var(--bg-elevated); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.steps { display: grid; gap: 24px; max-width: 640px; margin: 0 auto; }
.step { display: flex; gap: 20px; align-items: flex-start; }
.step-number {
  flex-shrink: 0; width: 40px; height: 40px;
  background: var(--accent); color: #0d1117;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 18px;
}
.step-content h3 { font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.step-content p { font-size: 14px; color: var(--text-muted); }

/* Requirements */
.req-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 700px; margin: 0 auto; }
.req-box {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px;
}
.req-box h3 { font-size: 17px; font-weight: 600; margin-bottom: 12px; }
.req-box ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.req-box li { font-size: 14px; color: var(--text-muted); padding-left: 18px; position: relative; }
.req-box li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 700; }

/* Tech */
.tech-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px; max-width: 800px; margin: 0 auto;
}
.tech-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 20px;
  display: flex; flex-direction: column; gap: 4px;
}
.tech-label { font-size: 12px; font-weight: 600; color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px; }
.tech-value { font-size: 14px; }

/* Install */
.install { background: var(--bg-elevated); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.install-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; text-align: center; max-width: 640px; margin: 0 auto;
}
.install-card p { font-size: 15px; color: var(--text-muted); margin-bottom: 20px; }
.install-cta { margin-bottom: 24px; }
.install-build { text-align: left; }
.install-build p { font-size: 13px; color: var(--text-muted); margin-bottom: 8px; }
.install-build code {
  display: block; background: var(--bg); border: 1px solid var(--border);
  border-radius: 4px; padding: 10px 16px; font-size: 13px; font-family: 'SF Mono', 'Fira Code', monospace;
  margin-bottom: 8px;
}
.install-build-path { font-size: 13px !important; }
.install-build-path code { display: inline; padding: 2px 6px; }

/* Docs */
.docs-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px; max-width: 800px; margin: 0 auto;
}
.doc-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; text-decoration: none;
  color: var(--text); transition: border-color 0.15s;
  display: block;
}
.doc-card:hover { border-color: var(--accent); }
.doc-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.doc-card p { font-size: 13px; color: var(--text-muted); }

/* Support */
.support { text-align: center; }
.support-desc { font-size: 15px; color: var(--text-muted); max-width: 560px; margin: 0 auto 24px; }
.support-actions { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* Tested */
.tested { border-top: 1px solid var(--border); }
.tested-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px; max-width: 720px; margin: 0 auto;
}
.tested-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; text-align: center;
  display: flex; flex-direction: column; gap: 4px;
}
.tested-emoji { font-size: 28px; }
.tested-card strong { font-size: 15px; }
.tested-meta { font-size: 13px; color: var(--text-muted); }

/* Footer */
.footer {
  border-top: 1px solid var(--border); padding: 28px 0;
  font-size: 13px; color: var(--text-muted);
}
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer-right { display: flex; gap: 8px; align-items: center; }
.footer-right a { color: var(--text-muted); text-decoration: none; }
.footer-right a:hover { color: var(--accent); }
.footer-sep { color: var(--border); }

/* Responsive */
@media (max-width: 640px) {
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 17px; }
  .req-columns { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: center; }
  .topbar-inner { flex-wrap: wrap; height: auto; padding: 10px 0; gap: 8px; }
  .footer-inner { flex-direction: column; text-align: center; }
}