:root {
    --bg: #1a1a2e;
    --bg-section: #16213e;
    --bg-card: #0f3460;
    --accent: #e94560;
    --accent2: #533483;
    --text: #e8e8e8;
    --text-muted: #8892b0;
    --text-dim: #5a6380;
    --code-bg: #0d1117;
    --border: #1e2d5a;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 20px rgba(0,0,0,.3);
    --font: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;
    --mono: "SF Mono","Cascadia Code","JetBrains Mono","Fira Code","Consolas",monospace;
}

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

html { scroll-behavior:smooth; }

body {
    font-family:var(--font);
    background:var(--bg);
    color:var(--text);
    line-height:1.6;
    font-size:16px;
    -webkit-font-smoothing:antialiased;
}

.container { max-width:1100px; margin:0 auto; padding:0 24px; }

/* Hero */
.hero {
    min-height:90vh;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    text-align:center;
    background:linear-gradient(135deg,var(--bg) 0%,var(--bg-section) 50%,#1a0a2e 100%);
    position:relative;
    overflow:hidden;
}
.hero::before {
    content:'';
    position:absolute;
    top:-50%;
    left:-50%;
    width:200%;
    height:200%;
    background:radial-gradient(circle at 30% 50%,var(--accent) 0%,transparent 30%),
               radial-gradient(circle at 70% 50%,var(--accent2) 0%,transparent 30%);
    opacity:.08;
    pointer-events:none;
}
.hero h1 {
    font-size:clamp(3rem,8vw,6rem);
    font-weight:800;
    letter-spacing:-.03em;
    background:linear-gradient(135deg,var(--text) 0%,var(--accent) 100%);
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
    background-clip:text;
    line-height:1.1;
    position:relative;
}
.hero .tagline {
    font-size:clamp(1rem,2.5vw,1.35rem);
    color:var(--text-muted);
    max-width:600px;
    margin:24px 0 40px;
    position:relative;
}
.hero .btn {
    display:inline-block;
    padding:14px 36px;
    border-radius:50px;
    background:var(--accent);
    color:#fff;
    text-decoration:none;
    font-weight:600;
    font-size:1.05rem;
    transition:transform .2s,box-shadow .2s;
    position:relative;
}
.hero .btn:hover { transform:translateY(-2px); box-shadow:0 8px 30px rgba(233,69,96,.4); }

/* Sections */
section { padding:80px 0; }
section:nth-child(even) { background:var(--bg-section); }

.section-title {
    font-size:clamp(1.6rem,4vw,2.2rem);
    font-weight:700;
    margin-bottom:16px;
    text-align:center;
}
.section-sub {
    text-align:center;
    color:var(--text-muted);
    max-width:640px;
    margin:0 auto 48px;
    font-size:1.05rem;
}

/* Philosophy */
.philosophy-grid {
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
    gap:24px;
}
.phil-item {
    background:var(--bg-card);
    padding:28px;
    border-radius:var(--radius);
    border:1px solid var(--border);
    transition:transform .25s,border-color .25s;
}
.phil-item:hover { transform:translateY(-4px); border-color:var(--accent); }
.phil-item h3 { color:var(--accent); margin-bottom:8px; font-size:1.1rem; }
.phil-item p { color:var(--text-muted); font-size:.95rem; line-height:1.5; }

/* Code */
.code-block {
    background:var(--code-bg);
    border-radius:var(--radius);
    padding:24px;
    overflow-x:auto;
    border:1px solid var(--border);
    font-family:var(--mono);
    font-size:.85rem;
    line-height:1.7;
    tab-size:4;
    position:relative;
}
.code-block .lang-label {
    position:absolute;
    top:12px;
    right:16px;
    color:var(--text-dim);
    font-size:.75rem;
    font-family:var(--font);
    text-transform:uppercase;
    letter-spacing:.05em;
}
.code-block .kw { color:#ff79c6; }
.code-block .type { color:#8be9fd; }
.code-block .fn { color:#50fa7b; }
.code-block .str { color:#f1fa8c; }
.code-block .num { color:#bd93f9; }
.code-block .cmt { color:#6272a4; font-style:italic; }
.code-block .op { color:#ff79c6; }

/* Features */
.features-grid {
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
    gap:20px;
}
.feature-card {
    background:var(--bg-card);
    border-radius:var(--radius);
    padding:28px;
    border:1px solid var(--border);
    transition:transform .25s,box-shadow .25s,border-color .25s;
    cursor:default;
}
.feature-card:hover {
    transform:translateY(-6px);
    box-shadow:0 12px 40px rgba(0,0,0,.4);
    border-color:var(--accent);
}
.feature-card .icon {
    font-size:1.75rem;
    margin-bottom:12px;
    display:block;
}
.feature-card h3 { font-size:1.1rem; margin-bottom:8px; }
.feature-card p { color:var(--text-muted); font-size:.9rem; line-height:1.5; }

/* Performance */
.perf-grid {
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(300px,1fr));
    gap:24px;
}
.perf-card {
    background:var(--bg-card);
    border-radius:var(--radius);
    padding:28px;
    border:1px solid var(--border);
}
.perf-card h3 { margin-bottom:16px; font-size:1.1rem; }
.perf-bar-track {
    background:var(--bg);
    border-radius:6px;
    height:28px;
    position:relative;
    margin-bottom:12px;
    overflow:hidden;
}
.perf-bar {
    height:100%;
    border-radius:6px;
    display:flex;
    align-items:center;
    padding-left:10px;
    font-size:.75rem;
    font-weight:600;
    font-family:var(--mono);
    color:#fff;
    transition:width .8s ease;
}
.perf-bar.accent { background:linear-gradient(90deg,var(--accent),#ff6b81); }
.perf-bar.accent2 { background:linear-gradient(90deg,var(--accent2),#7c4dff); }
.perf-bar.teal { background:linear-gradient(90deg,#0fb9b1,#20c997); }
.perf-label {
    display:flex;
    justify-content:space-between;
    color:var(--text-muted);
    font-size:.85rem;
}

/* Quick Start */
.steps { counter-reset:step; }
.step {
    display:flex;
    gap:16px;
    margin-bottom:20px;
    align-items:flex-start;
}
.step-num {
    flex-shrink:0;
    width:36px;
    height:36px;
    border-radius:50%;
    background:var(--accent);
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight:700;
    font-size:.9rem;
}
.step-body { flex:1; }
.step-body h3 { margin-bottom:6px; font-size:1rem; }
.step-body p { color:var(--text-muted); font-size:.9rem; margin-bottom:8px; }
.step-body .code-block { margin-top:8px; }

/* Architecture pipeline */
.pipeline {
    display:flex;
    align-items:center;
    justify-content:center;
    flex-wrap:wrap;
    gap:0;
    padding:24px 0;
}
.pipe-step {
    background:var(--bg-card);
    border:1px solid var(--border);
    border-radius:var(--radius-sm);
    padding:16px 24px;
    text-align:center;
    min-width:120px;
    transition:border-color .2s,transform .2s;
}
.pipe-step:hover { border-color:var(--accent); transform:translateY(-2px); }
.pipe-step .label { font-weight:600; font-size:.85rem; }
.pipe-step .sub { color:var(--text-dim); font-size:.75rem; margin-top:4px; font-family:var(--mono); }
.pipe-arrow {
    color:var(--accent);
    font-size:1.5rem;
    padding:0 8px;
    font-weight:300;
    user-select:none;
}
.pipe-row {
    display:flex;
    align-items:center;
    justify-content:center;
    flex-wrap:wrap;
}
.pipe-extra {
    text-align:center;
    margin-top:24px;
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    gap:12px;
}
.pipe-extra .pipe-step { min-width:100px; padding:12px 16px; }

/* Docs links */
.docs-links {
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
    gap:16px;
    margin-top:24px;
}
.lang-toggle {
    position:absolute;
    top:20px;
    right:24px;
    z-index:10;
}
.lang-toggle a {
    color:var(--text-muted);
    text-decoration:none;
    font-size:.85rem;
    padding:6px 14px;
    border:1px solid var(--border);
    border-radius:20px;
    transition:color .2s,border-color .2s;
}
.lang-toggle a:hover { color:var(--accent); border-color:var(--accent); }

.doc-link {
    display:block;
    background:var(--bg-card);
    border:1px solid var(--border);
    border-radius:var(--radius-sm);
    padding:20px;
    text-decoration:none;
    color:var(--text);
    transition:border-color .25s,transform .25s;
}
.doc-link:hover { border-color:var(--accent); transform:translateY(-3px); }
.doc-link.pt-link { border-color:var(--accent2); }
.doc-link.pt-link:hover { border-color:var(--accent); }
.doc-link h4 { font-size:.95rem; margin-bottom:4px; }
.doc-link p { color:var(--text-muted); font-size:.8rem; }

/* Footer */
footer {
    text-align:center;
    padding:32px 24px;
    color:var(--text-dim);
    font-size:.85rem;
    border-top:1px solid var(--border);
}
footer .ai-note { font-size:.7rem; color:var(--text-dim); opacity:.6; margin-top:8px; }

/* Fade-in animation */
.fade-in {
    opacity:0;
    transform:translateY(24px);
    transition:opacity .6s ease,transform .6s ease;
}
.fade-in.visible { opacity:1; transform:translateY(0); }

/* Responsive */
@media(max-width:768px) {
    section { padding:48px 0; }
    .hero { min-height:70vh; }
    .pipeline { flex-direction:column; }
    .pipe-arrow { transform:rotate(90deg); padding:4px 0; }
    .pipe-row { flex-direction:column; }
}
@media(max-width:480px) {
    .container { padding:0 16px; }
    .perf-grid,.features-grid,.philosophy-grid { grid-template-columns:1fr; }
    .docs-links { grid-template-columns:1fr 1fr; }
}