:root {
  --bg: #0a0e1a;
  --bg-2: #0f1525;
  --card: #131c30;
  --card-hover: #182338;
  --text: #e8edf7;
  --muted: #8896b0;
  --border: #1e2a44;
  --accent: #3b82f6;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --grad-1: #3b82f6;
  --grad-2: #8b5cf6;
  --green: #10b981;
  --orange: #f59e0b;
  --radius: 14px;
}

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

body {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }

/* Nav */
#nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 960px; margin: 0 auto; padding: 0 20px;
  height: 56px; display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
  font-weight: 800; font-size: 1.1rem; color: var(--text); text-decoration: none;
  display: flex; align-items: center; gap: 6px;
}
.logo-icon { font-size: 1.2rem; }
.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-gh {
  border: 1px solid var(--border); padding: 6px 14px; border-radius: 8px;
}
.nav-gh:hover { border-color: var(--accent); color: var(--accent-light); }
.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.3rem; cursor: pointer; }

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  #nav.open .nav-links {
    display: flex; flex-direction: column; position: absolute; top: 56px; left: 0; right: 0;
    background: var(--bg-2); padding: 12px 20px; gap: 14px;
    border-bottom: 1px solid var(--border);
  }
}

/* Hero */
.hero { padding: 80px 0 60px; text-align: center; }
.hero-badge {
  display: inline-block; padding: 6px 16px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--card);
  font-size: 13px; color: var(--muted); margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2rem, 6vw, 3.2rem);
  font-weight: 800; line-height: 1.15; margin-bottom: 16px;
}
.grad {
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  max-width: 560px; margin: 0 auto 32px;
  font-size: 1.05rem; color: var(--muted);
}
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block; padding: 12px 28px; border-radius: 10px;
  font-weight: 600; font-size: 15px; text-decoration: none;
  transition: all 0.2s; cursor: pointer; border: none;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 4px 14px var(--accent-glow);
}
.btn-primary:hover { background: #2563eb; transform: translateY(-1px); }
.btn-ghost {
  border: 1px solid var(--border); color: var(--text); background: transparent;
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-light); }

.hero-stats {
  display: flex; gap: 40px; justify-content: center; margin-top: 48px;
  flex-wrap: wrap;
}
.hero-stats > div { text-align: center; }
.hero-stats b {
  display: block; font-size: 1.8rem; font-weight: 800;
  background: linear-gradient(135deg, var(--grad-1), var(--grad-2));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-stats span { font-size: 13px; color: var(--muted); }

/* Section titles */
.sec-title {
  font-size: 1.8rem; font-weight: 700; text-align: center; margin-bottom: 8px;
}
.sec-sub {
  text-align: center; color: var(--muted); margin-bottom: 40px; font-size: 1rem;
}

/* Pain */
.pain { padding: 60px 0; }
.pain-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
.pain-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; transition: background 0.2s;
}
.pain-card:hover { background: var(--card-hover); }
.pain-icon { font-size: 1.8rem; margin-bottom: 10px; }
.pain-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.pain-card p { color: var(--muted); font-size: 14px; }

/* Solution / Architecture */
.solution { padding: 60px 0; }
.arch-flow {
  display: flex; align-items: stretch; gap: 8px; flex-wrap: wrap;
  justify-content: center; margin: 32px 0;
}
.arch-node {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 16px; text-align: center; width: 150px; transition: all 0.2s;
}
.arch-node:hover { border-color: var(--accent); box-shadow: 0 0 20px var(--accent-glow); }
.arch-emoji { font-size: 1.8rem; margin-bottom: 8px; }
.arch-node h4 { font-size: 14px; margin-bottom: 4px; }
.arch-node p { font-size: 12px; color: var(--muted); }
.arch-ports { margin-top: 8px; display: flex; flex-direction: column; gap: 2px; }
.arch-ports span {
  font-size: 11px; font-family: monospace; color: var(--accent-light);
  background: rgba(59,130,246,0.1); border-radius: 4px; padding: 1px 6px;
}
.arch-arrow {
  display: flex; align-items: center; font-size: 1.4rem; color: var(--accent);
  font-weight: 700;
}

@media (max-width: 700px) {
  .arch-arrow { display: none; }
  .arch-flow { flex-direction: column; }
  .arch-node { width: 100%; }
}

.callout {
  background: var(--accent-glow); border: 1px solid rgba(59,130,246,0.3);
  border-radius: var(--radius); padding: 16px 20px;
  display: flex; gap: 12px; align-items: flex-start; margin-top: 24px;
}
.callout-icon { font-size: 1.3rem; flex-shrink: 0; }
.callout p { font-size: 14px; color: var(--text); }
.callout code {
  background: rgba(59,130,246,0.2); padding: 1px 6px; border-radius: 4px;
  font-family: monospace; font-size: 13px;
}

/* Features */
.features { padding: 60px 0; }
.feat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.feat-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; transition: all 0.2s;
}
.feat-card:hover { background: var(--card-hover); border-color: rgba(59,130,246,0.4); }
.feat-emoji { font-size: 1.6rem; margin-bottom: 10px; }
.feat-card h3 { font-size: 1rem; margin-bottom: 6px; }
.feat-card p { font-size: 14px; color: var(--muted); }
.feat-card code {
  background: rgba(59,130,246,0.15); padding: 1px 5px; border-radius: 4px;
  font-family: monospace; font-size: 12px; color: var(--accent-light);
}

/* Deploy */
.deploy { padding: 60px 0; }
.deploy-steps { display: flex; flex-direction: column; gap: 20px; max-width: 680px; margin: 0 auto; }
.step { display: flex; gap: 16px; align-items: flex-start; }
.step-num {
  width: 36px; height: 36px; border-radius: 50%; flex-shrink: 0;
  background: var(--accent); color: #fff; font-weight: 700;
  display: flex; align-items: center; justify-content: center; font-size: 1rem;
}
.step-body h3 { font-size: 1.1rem; margin-bottom: 6px; }
.step-body p { color: var(--muted); font-size: 14px; }
.step-body code {
  background: rgba(59,130,246,0.15); padding: 1px 5px; border-radius: 4px;
  font-family: monospace; color: var(--accent-light); font-size: 13px;
}
.step pre {
  margin-top: 10px; background: #0a0a0f; border: 1px solid var(--border);
  border-radius: 10px; padding: 14px 16px; overflow-x: auto;
  font-family: monospace; font-size: 13px; color: #a8f0c4;
  white-space: pre;
}

.port-table { max-width: 560px; margin: 40px auto 0; }
.port-table h3 { text-align: center; margin-bottom: 16px; font-size: 1.1rem; }
.port-row {
  display: flex; gap: 16px; align-items: center; padding: 12px 16px;
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  margin-bottom: 8px;
}
.port-num {
  font-family: monospace; font-weight: 700; font-size: 1.1rem;
  min-width: 56px; text-align: center; color: var(--text);
}
.port-num.highlight { color: var(--green); }
.port-num.warn { color: var(--orange); }
.port-desc { font-size: 14px; color: var(--muted); }

/* Changelog */
.changelog { padding: 60px 0; }
.changelog-list { max-width: 600px; margin: 0 auto 24px; }
.cl-item {
  display: grid; grid-template-columns: 80px 80px 1fr; gap: 16px;
  padding: 14px 0; border-bottom: 1px solid var(--border);
  align-items: center;
}
.cl-version { font-weight: 700; color: var(--accent-light); font-size: 14px; }
.cl-date { font-size: 13px; color: var(--muted); }
.cl-content { font-size: 14px; color: var(--text); }
@media (max-width: 560px) {
  .cl-item { grid-template-columns: 1fr; gap: 4px; }
}
.changelog .btn { display: block; margin: 0 auto; width: fit-content; }

/* FAQ */
.faq { padding: 60px 0 40px; }
.faq-list { max-width: 680px; margin: 0 auto; }
.faq-item {
  background: var(--card); border: 1px solid var(--border); border-radius: 10px;
  padding: 0; margin-bottom: 10px; overflow: hidden;
}
.faq-item summary {
  padding: 16px 20px; cursor: pointer; font-weight: 600; font-size: 15px;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
.faq-item summary::after { content: '＋'; font-size: 1.2rem; color: var(--muted); }
.faq-item[open] summary::after { content: '－'; }
.faq-item[open] summary { border-bottom: 1px solid var(--border); }
.faq-item p { padding: 16px 20px; color: var(--muted); font-size: 14px; }
.faq-item code {
  background: rgba(59,130,246,0.15); padding: 1px 5px; border-radius: 4px;
  font-family: monospace; font-size: 13px; color: var(--accent-light);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border); padding: 40px 0 20px; margin-top: 40px;
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: flex-start;
  flex-wrap: wrap; gap: 20px;
}
.footer-brand { font-weight: 800; font-size: 1.1rem; }
.footer-brand p { font-size: 13px; color: var(--muted); font-weight: 400; margin-top: 4px; }
.footer-links { display: flex; gap: 20px; align-items: center; }
.footer-links a { color: var(--muted); text-decoration: none; font-size: 14px; }
.footer-links a:hover { color: var(--accent-light); }
.footer-note {
  margin-top: 20px; font-size: 12px; color: var(--muted);
  text-align: center; opacity: 0.7;
}