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

:root {
    --bg-main: #ffffff;
    --bg-surface: #f8f8fa;
    --bg-code: #f4f4f8;
    --text-primary: #1a1a2e;
    --text-secondary: #6b7280;
    --text-dim: #9ca3af;
    --accent: #1a1a2e;
    --accent-hover: #000000;
    --accent-light: rgba(139, 92, 246, 0.08);
    --green: #059669;
    --border: #e5e7eb;
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

html { scroll-behavior: smooth; overflow-x: hidden; }

body {
    font-family: var(--font-display);
    background: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ═══════════ NAV ═══════════ */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    padding: 0.85rem 2rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.nav-logo-img { height: 120px; vertical-align: middle; background: transparent !important; border: none !important; box-shadow: none !important; padding: 0 !important; border-radius: 0 !important; }

.nav-right { display: flex; gap: 1.5rem; align-items: center; }

.nav-right a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.15s;
}
.nav-right a:hover { color: var(--text-primary); text-decoration: none; }
.nav-right a.btn-accent { color: #fff; }
.nav-right a.btn-accent:hover { color: #fff; }

.nav-lang { font-size: 0.85rem; color: var(--text-dim); }
.nav-lang a { color: var(--text-dim); }
.nav-lang a.active { color: var(--accent); font-weight: 600; }

.btn {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.15s;
    border: none;
    cursor: pointer;
}

.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: var(--accent-hover); text-decoration: none; }

.btn-outline {
    border: 1px solid var(--border);
    color: var(--text-secondary);
    background: transparent;
}
.btn-outline:hover { border-color: var(--accent); color: var(--text-primary); text-decoration: none; }

/* ═══════════ SECTIONS ═══════════ */
section {
    padding: 5rem 2rem;
    max-width: 960px;
    margin: 0 auto;
    overflow-x: hidden;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.6rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 560px;
}

/* ═══════════ HERO ═══════════ */
.hero {
    padding-top: 11rem;
    padding-bottom: 6rem;
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.4rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero .subtitle {
    color: var(--text-secondary);
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

.hero-buttons { display: flex; gap: 0.8rem; justify-content: center; }

/* ═══════════ PILLARS ═══════════ */
.pillars {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding-top: 3rem;
    padding-bottom: 3rem;
}

.pillar h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.pillar p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ═══════════ ARCHITECTURE ═══════════ */
.arch-diagram {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    margin: 1.8rem 0;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    overflow-x: auto;
}

.arch-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.arch-box {
    padding: 0.45rem 0.9rem;
    border-radius: 6px;
    white-space: nowrap;
    border: 1px solid var(--border);
    background: var(--bg-main);
    color: var(--text-secondary);
}

.arch-box.proxy { color: var(--accent); border-color: rgba(139, 92, 246, 0.3); background: var(--accent-light); }
.arch-box.serve { color: var(--green); border-color: rgba(5, 150, 105, 0.25); background: rgba(5, 150, 105, 0.06); }
.arch-box.kv { color: #d97706; border-color: rgba(217, 119, 6, 0.25); background: rgba(217, 119, 6, 0.06); }

.arch-arrow { color: var(--text-dim); }

.arch-note {
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 0.95rem;
    margin-top: 1rem;
}

/* ═══════════ PRODUCT CARDS ═══════════ */
.products-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.8rem;
    margin-top: 1.8rem;
}

.product-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.8rem;
}

.product-name {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent);
}

.product-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-left: 0.8rem;
}

.product-header {
    display: flex;
    align-items: baseline;
    gap: 0.6rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.product-stats {
    display: flex;
    gap: 0.6rem;
    margin: 0.8rem 0;
    flex-wrap: wrap;
}

.stat {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 0.3rem 0.7rem;
    border-radius: 6px;
    background: var(--bg-main);
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.stat strong { color: var(--green); font-weight: 600; }

.product-code-wrapper { margin: 1rem 0; position: relative; }

.product-code-wrapper pre {
    max-height: 200px;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.product-code-wrapper.expanded pre { max-height: none; }

.code-toggle {
    display: block;
    width: 100%;
    padding: 0.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-top: none;
    border-radius: 0 0 8px 8px;
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    cursor: pointer;
    text-align: center;
}
.code-toggle:hover { background: var(--bg-code); }

.product-actions { margin-top: 0.8rem; }

.products-note {
    color: var(--text-dim);
    font-size: 0.9rem;
    text-align: center;
    margin-top: 1.8rem;
}

/* ═══════════ CODE BLOCKS ═══════════ */
pre {
    background: var(--bg-code);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.2rem 1.4rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    line-height: 1.65;
    color: var(--text-primary);
    tab-size: 4;
    max-width: 100%;
}

.kw { color: #7c3aed; }
.fn { color: #2563eb; }
.str { color: #059669; }
.num { color: #d97706; }
.cm { color: #9ca3af; }
.ty { color: #db2777; }
.op { color: #6b7280; }

/* ═══════════ BENCHMARKS ═══════════ */
.bench-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    margin-top: 1.8rem;
}

.bench-card {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    text-align: center;
}

.bench-number {
    font-family: var(--font-mono);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--green);
    line-height: 1.2;
}

.bench-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 0.3rem;
}

.bench-sublabel {
    color: var(--text-dim);
    font-size: 0.78rem;
}

/* ═══════════ LEARN ═══════════ */
.learn-steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.8rem;
    margin-top: 1.8rem;
}

.step-label {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}

.learn-buttons {
    display: flex;
    gap: 0.8rem;
    margin-top: 2rem;
    flex-wrap: wrap;
    align-items: center;
}

.coming-soon {
    color: var(--text-dim);
    font-size: 0.85rem;
    font-style: italic;
}

/* ═══════════ STORY ═══════════ */
.story-text {
    color: var(--text-secondary);
    font-size: 0.98rem;
    line-height: 1.85;
    max-width: 640px;
}

.story-text p { margin-bottom: 1rem; }

.bootstrap-diagram {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1.8rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    text-align: center;
}

.bootstrap-diagram .flow { color: var(--text-primary); margin-bottom: 0.4rem; }
.bootstrap-diagram .note { color: var(--text-dim); font-size: 0.8rem; }

/* ═══════════ CONTRIBUTE ═══════════ */
.contribute-text {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 560px;
    margin-bottom: 1.5rem;
}

.contribute-buttons { display: flex; gap: 0.8rem; flex-wrap: wrap; }

/* ═══════════ TRIAL ═══════════ */
.trial-box {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2.5rem;
    text-align: center;
}

.trial-box pre { text-align: left; max-width: 460px; margin: 1.2rem auto; }

.trial-note { color: var(--text-dim); font-size: 0.88rem; margin-top: 0.8rem; }

/* ═══════════ FOOTER ═══════════ */
footer {
    border-top: 1px solid var(--border);
    padding: 3rem 2rem 2rem;
    max-width: 960px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h4 {
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.6rem;
}

.footer-col a {
    display: block;
    color: var(--text-dim);
    font-size: 0.88rem;
    padding: 0.2rem 0;
}
.footer-col a:hover { color: var(--text-secondary); }

.footer-bottom {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.82rem;
    line-height: 1.8;
}

/* ═══════════ RESPONSIVE ═══════════ */
@media (max-width: 768px) {
    nav { padding: 0.7rem 1rem; max-width: 100vw; }
    .nav-logo { font-size: 1.5rem; }
    .nav-right { gap: 0.8rem; }
    .nav-right a:not(.nav-lang) { display: none; }
    .nav-right .nav-lang { display: inline; }

    .hero { padding-top: 7rem; padding-bottom: 3rem; }
    .hero h1 { font-size: 2.2rem; }
    .hero .subtitle { font-size: 1rem; }
    .hero-buttons { flex-direction: column; align-items: stretch; }
    .hero-buttons .btn { width: 100%; text-align: center; }

    section { padding: 3rem 1.2rem; }
    .section-title { font-size: 1.5rem; }
    .section-subtitle { font-size: 0.95rem; }

    .pillars { grid-template-columns: 1fr; gap: 1.5rem; }

    .arch-diagram { padding: 1.2rem; font-size: 0.78rem; }
    .arch-row { flex-direction: column; align-items: flex-start; gap: 0.3rem; }
    .arch-arrow { display: none; }

    .products-grid { gap: 1.2rem; }
    .product-card { padding: 1.2rem; }
    .product-header { flex-direction: column; gap: 0.3rem; }
    .product-stats { gap: 0.4rem; }
    .product-code-wrapper pre { font-size: 0.75rem; max-height: 160px; }

    pre { font-size: 0.75rem; overflow-x: auto; -webkit-overflow-scrolling: touch; max-width: 100%; }

    .product-code-wrapper { overflow-x: auto; max-width: 100%; }

    .bench-grid { grid-template-columns: 1fr; gap: 0.8rem; }
    .bench-card { padding: 1rem; }
    .bench-number { font-size: 1.4rem; }

    .learn-steps pre { font-size: 0.75rem; }
    .learn-buttons { flex-direction: column; align-items: stretch; }
    .learn-buttons .btn { width: 100%; text-align: center; }

    .story-text { font-size: 0.92rem; }
    .bootstrap-diagram { font-size: 0.78rem; padding: 1rem; }

    .trial-box { padding: 1.5rem; }
    .trial-box pre { font-size: 0.75rem; }

    .contribute-buttons { flex-direction: column; align-items: stretch; }
    .contribute-buttons .btn { width: 100%; text-align: center; }

    .footer-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.8rem; }
    .nav-logo { font-size: 1.3rem; }

    .bench-number { font-size: 1.2rem; }

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

    .arch-box { font-size: 0.75rem; padding: 0.35rem 0.7rem; }
}