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

:root {
  --c-bg: #060e16;
  --c-bg-2: #0d1b2a;
  --c-bg-3: #1e2e3b;
  --c-border: #2a3f50;
  --c-text: #e8edf2;
  --c-muted: #8a9baa;
  --c-accent: #00b8d9;
  --c-accent-hi: #00e5ff;
  --c-accent-lo: #003d4d;
  --c-green: #22c55e;
  --c-red: #ef4444;
  --f-sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --f-mono: 'IBM Plex Mono', ui-monospace, 'Courier New', monospace;
  --r: 0.5rem;
}

html { scroll-behavior: smooth; }
body { background: var(--c-bg); color: var(--c-text); font-family: var(--f-sans); line-height: 1.65; font-size: 16px; }
a { color: var(--c-accent); text-decoration: none; }
a:hover { color: var(--c-accent-hi); text-decoration: underline; }
code, pre { font-family: var(--f-mono); }
img { max-width: 100%; height: auto; display: block; }
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; }
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: 1.15rem; }

/* ===== NAV ===== */
.nav { background: rgba(6, 14, 22, 0.95); border-bottom: 1px solid var(--c-border); position: sticky; top: 0; z-index: 100; backdrop-filter: blur(8px); }
.nav-inner { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; display: flex; align-items: center; gap: 1.5rem; height: 60px; }
.nav-logo { display: flex; align-items: center; gap: 0.6rem; font-size: 1.1rem; font-weight: 700; color: var(--c-text); flex-shrink: 0; }
.nav-logo svg { flex-shrink: 0; }
.nav-logo:hover { text-decoration: none; color: var(--c-accent-hi); }
.nav-links { display: flex; align-items: center; gap: 0.25rem; flex: 1; }
.nav-link { padding: 0.4rem 0.75rem; border-radius: var(--r); font-size: 0.9rem; color: var(--c-muted); transition: color 0.15s, background 0.15s; }
.nav-link:hover { color: var(--c-text); background: var(--c-bg-3); text-decoration: none; }
.nav-link.active { color: var(--c-accent); }
.nav-toggle { display: none; background: none; border: 1px solid var(--c-border); color: var(--c-text); padding: 0.35rem 0.65rem; border-radius: var(--r); cursor: pointer; margin-left: auto; font-size: 1rem; }

/* ===== BUTTONS ===== */
.btn-primary { background: var(--c-accent); color: #000; font-weight: 700; padding: 0.75rem 1.5rem; border-radius: var(--r); display: inline-block; transition: background 0.15s, transform 0.1s; }
.btn-primary:hover { background: var(--c-accent-hi); text-decoration: none; transform: translateY(-1px); }
.btn-secondary { border: 2px solid var(--c-accent); color: var(--c-accent); font-weight: 600; padding: 0.65rem 1.4rem; border-radius: var(--r); display: inline-block; transition: background 0.15s; }
.btn-secondary:hover { background: rgba(0,184,217,0.1); text-decoration: none; }
.btn-outline { border: 1px solid var(--c-border); color: var(--c-text); padding: 0.6rem 1.2rem; border-radius: var(--r); display: inline-block; transition: border-color 0.15s; }
.btn-outline:hover { border-color: var(--c-accent); text-decoration: none; }

/* ===== HERO ===== */
.hero { padding: 4rem 1.5rem 3rem; background: linear-gradient(160deg, #060e16 0%, #0d1b2a 50%, #001a26 100%); border-bottom: 1px solid var(--c-border); }
.hero-inner { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1.1fr; gap: 3rem; align-items: center; }
.hero-title { font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.1; margin-bottom: 1rem; background: linear-gradient(135deg, #fff 0%, #80e8f5 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-sub { font-size: 1.15rem; color: var(--c-muted); margin-bottom: 2rem; max-width: 520px; }
.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.hero-stats { display: flex; gap: 2rem; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat .num { font-size: 1.5rem; font-weight: 800; color: var(--c-accent); }
.stat .lbl { font-size: 0.78rem; color: var(--c-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.hero-visual img { border-radius: 10px; border: 1px solid rgba(0,184,217,0.25); box-shadow: 0 16px 48px rgba(0,0,0,0.6), 0 0 0 1px rgba(0,184,217,0.1); }

/* ===== SECTIONS ===== */
.section { padding: 4rem 1.5rem; }
.section-dark { background: var(--c-bg-2); border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }
.section-cta { background: linear-gradient(135deg, #001a26, #0d1b2a); border-top: 1px solid var(--c-border); padding: 5rem 1.5rem; }
.section-cta h2 { margin-bottom: 1.5rem; font-size: clamp(1.5rem, 3vw, 2.25rem); }
.container { max-width: 1100px; margin: 0 auto; }
.section-title { margin-bottom: 0.75rem; }
.section-sub { color: var(--c-muted); margin-bottom: 2rem; max-width: 680px; }

/* ===== FEATURE GRID ===== */
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; margin-top: 2rem; }
.feature-card { background: var(--c-bg-2); border: 1px solid var(--c-border); border-radius: 10px; padding: 1.75rem; transition: border-color 0.2s; }
.feature-card:hover { border-color: var(--c-accent); }
.feature-icon { font-size: 2rem; margin-bottom: 1rem; }
.feature-card h3 { color: var(--c-accent); margin-bottom: 0.5rem; }
.feature-card p { color: var(--c-muted); font-size: 0.95rem; }

/* ===== TWO-COL ===== */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
.two-col h2 { margin-bottom: 1rem; }
.two-col p { color: var(--c-muted); margin-bottom: 1rem; }
.two-col strong { color: var(--c-text); }
.two-col .btn-outline { margin-top: 0.5rem; }

/* ===== ARCH DIAGRAM ===== */
.arch-diagram { display: flex; flex-direction: column; gap: 1rem; }
.arch-box { border: 1px solid var(--c-border); border-radius: 8px; padding: 1.25rem; }
.arch-bad { border-color: rgba(239,68,68,0.3); background: rgba(239,68,68,0.04); }
.arch-good { border-color: rgba(0,184,217,0.4); background: rgba(0,184,217,0.06); }
.arch-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--c-muted); margin-bottom: 0.75rem; }
.arch-flow { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; font-family: var(--f-mono); font-size: 0.9rem; }
.arch-node { background: var(--c-bg-3); border: 1px solid var(--c-border); border-radius: 4px; padding: 0.5rem 0.75rem; text-align: center; }
.arch-node-red { border-color: rgba(239,68,68,0.4); }
.arch-node-blue { border-color: rgba(0,184,217,0.5); color: var(--c-accent-hi); }
.arch-node small { display: block; font-size: 0.75rem; color: var(--c-muted); }
.arch-arrow { color: var(--c-muted); }
.arch-result { margin-top: 0.75rem; font-size: 0.85rem; font-family: var(--f-mono); padding-left: 0.5rem; }
.arch-result-bad { color: var(--c-red); }
.arch-result-good { color: var(--c-green); }

/* ===== SCREENSHOTS ===== */
.screenshot-hero { margin: 1.5rem 0; }
.screenshot-hero img { border-radius: 10px; border: 1px solid rgba(0,184,217,0.2); box-shadow: 0 8px 32px rgba(0,0,0,0.5); width: 100%; }
.screenshot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem; margin-top: 1.25rem; }
.screenshot-item img { border-radius: 8px; border: 1px solid var(--c-border); width: 100%; transition: border-color 0.2s; }
.screenshot-item img:hover { border-color: var(--c-accent); }
.screenshot-item p { text-align: center; font-size: 0.8rem; color: var(--c-muted); margin-top: 0.5rem; }

/* ===== TERMINAL ===== */
.terminal { background: #06111a; border: 1px solid var(--c-border); border-radius: 10px; padding: 1.75rem; font-family: var(--f-mono); font-size: 0.875rem; line-height: 1.8; overflow-x: auto; white-space: pre; margin-top: 1.5rem; }
.terminal .prompt { color: var(--c-accent); display: block; }
.terminal .output { color: var(--c-muted); display: block; }
.terminal .hl { color: var(--c-accent-hi); }
.terminal br { display: none; }

/* ===== PLUGIN STACK ===== */
.stack { max-width: 720px; margin: 2rem auto 0; }
.stack-layer { background: rgba(0,184,217,0.07); border: 1px solid rgba(0,184,217,0.25); border-radius: 8px; padding: 1rem 1.25rem; }
.stack-layer-core { background: rgba(0,184,217,0.14); border-color: rgba(0,184,217,0.5); }
.stack-layer-oss { background: rgba(0,184,217,0.07); }
.stack-name { font-weight: 700; font-size: 1rem; margin-bottom: 0.25rem; }
.stack-name a { color: var(--c-text); }
.stack-name a:hover { color: var(--c-accent-hi); text-decoration: none; }
.stack-desc { font-size: 0.875rem; color: var(--c-muted); }
.stack-desc strong { color: var(--c-accent); }
.stack-arrow { text-align: center; color: var(--c-muted); font-size: 1.25rem; padding: 0.25rem 0; }
.stack-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* ===== PERF TABLE ===== */
.perf-table-wrap { overflow-x: auto; margin-top: 1.5rem; }
.perf-table { width: 100%; border-collapse: collapse; }
.perf-table th { background: var(--c-bg-3); color: var(--c-muted); text-align: left; padding: 0.75rem 1rem; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; }
.perf-table td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--c-border); font-size: 0.95rem; }
.perf-table td.val { font-family: var(--f-mono); color: var(--c-accent-hi); font-weight: 600; }
.perf-table tr:last-child td { border-bottom: none; }
.perf-table tr:hover td { background: rgba(255,255,255,0.02); }

/* ===== FOUNDATIONS ===== */
.foundations-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.5rem; margin-top: 2rem; }
.foundation-card { background: var(--c-bg-2); border: 1px solid var(--c-border); border-radius: 10px; padding: 1.75rem; }
.foundation-card h3 { color: var(--c-accent); margin-bottom: 0.5rem; }
.foundation-card p { color: var(--c-muted); font-size: 0.95rem; }

/* ===== DOCS LAYOUT ===== */
.doc-layout { display: grid; grid-template-columns: 260px 1fr; gap: 0; min-height: calc(100vh - 120px); max-width: 1200px; margin: 0 auto; }
.doc-sidebar { padding: 2rem 1rem 2rem 1.5rem; border-right: 1px solid var(--c-border); position: sticky; top: 60px; height: calc(100vh - 60px); overflow-y: auto; }
.doc-nav-heading { font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--c-muted); padding: 0.75rem 0.5rem 0.4rem; }
.doc-nav-group { margin-bottom: 0.5rem; }
.doc-nav-section { margin-bottom: 0.5rem; }
.doc-nav-link { display: block; padding: 0.4rem 0.6rem; border-radius: 5px; font-size: 0.9rem; color: var(--c-muted); transition: color 0.15s, background 0.15s; }
.doc-nav-link:hover { color: var(--c-text); background: var(--c-bg-3); text-decoration: none; }
.doc-nav-link.active { color: var(--c-accent); background: rgba(0,184,217,0.1); }
.doc-content { padding: 2.5rem 3rem; max-width: 860px; }
.doc-description { color: var(--c-muted); font-size: 1.1rem; border-left: 3px solid var(--c-accent); padding-left: 1rem; margin: 1rem 0 2rem; }

/* ===== DOC BODY MARKDOWN ===== */
.doc-body h1 { display: none; }
.doc-body h2 { margin: 2.5rem 0 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--c-border); font-size: 1.5rem; }
.doc-body h3 { margin: 2rem 0 0.75rem; font-size: 1.15rem; color: var(--c-accent-hi); }
.doc-body p { margin-bottom: 1rem; color: var(--c-muted); }
.doc-body strong { color: var(--c-text); }
.doc-body ul, .doc-body ol { padding-left: 1.5rem; margin-bottom: 1rem; }
.doc-body li { margin-bottom: 0.4rem; color: var(--c-muted); }
.doc-body li strong { color: var(--c-text); }
.doc-body pre { background: #06111a; border: 1px solid var(--c-border); border-radius: 8px; padding: 1.25rem; overflow-x: auto; margin: 1rem 0; font-size: 0.875rem; line-height: 1.7; }
.doc-body code { background: rgba(0,184,217,0.1); padding: 0.15em 0.4em; border-radius: 3px; font-size: 0.9em; }
.doc-body pre code { background: none; padding: 0; }
.doc-body table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: 0.9rem; }
.doc-body th { background: var(--c-bg-3); color: var(--c-muted); text-align: left; padding: 0.6rem 0.9rem; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
.doc-body td { padding: 0.6rem 0.9rem; border-bottom: 1px solid var(--c-border); }
.doc-body tr:last-child td { border-bottom: none; }
.doc-body blockquote { border-left: 3px solid var(--c-accent-lo); background: var(--c-bg-2); padding: 1rem 1.25rem; margin: 1rem 0; border-radius: 0 8px 8px 0; }
.doc-body blockquote p { margin: 0; }
.doc-list { list-style: none; padding: 0; margin-top: 1rem; }
.doc-list li { padding: 0.75rem 0; border-bottom: 1px solid var(--c-border); }
.doc-list li:last-child { border-bottom: none; }

/* ===== FOOTER ===== */
.footer { background: var(--c-bg-2); border-top: 1px solid var(--c-border); padding: 2rem 1.5rem; }
.footer-inner { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.footer-brand { font-weight: 600; }
.footer-links { display: flex; gap: 1.5rem; font-size: 0.9rem; }
.footer-meta { font-size: 0.85rem; color: var(--c-muted); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .two-col { grid-template-columns: 1fr; }
  .stack-row { grid-template-columns: 1fr; }
  .screenshot-grid { grid-template-columns: 1fr 1fr; }
  .doc-layout { grid-template-columns: 1fr; }
  .doc-sidebar { position: static; height: auto; border-right: none; border-bottom: 1px solid var(--c-border); padding: 1rem 1.5rem; }
  .doc-content { padding: 1.5rem; }
}

@media (max-width: 600px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: var(--c-bg); border-bottom: 1px solid var(--c-border); padding: 0.5rem; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .screenshot-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 1rem; }
  .footer-inner { flex-direction: column; text-align: center; }
}