:root {
    --bg: #ede8f5;
    --bg-1: #e0d9ee;
    --surface: #f7f4fd;
    --ink: #1a1320;
    --muted: #7a6d8a;
    --accent: #6d28d9;
    --accent-soft: #a78bfa;
    --border: rgba(26, 19, 32, 0.82);
    --border-soft: rgba(26, 19, 32, 0.13);
    --rule: 1.5px solid rgba(26, 19, 32, 0.82);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
}

body {
    font-family: "Space Grotesk", "Helvetica Neue", Arial, sans-serif;
    color: var(--ink);
    background-color: var(--bg);
    line-height: 1.55;
}

a {
    color: inherit;
}

main {
    width: min(1080px, 92vw);
    margin: 0 auto;
    padding: 1.5rem 0 5rem;
}

/* ── Banner ───────────────────────────────────────── */

.banner-wrap {
    margin-top: 1.5rem;
    border: var(--rule);
    overflow: hidden;
    line-height: 0;
}

.banner-wrap img {
    width: 100%;
    height: auto;
    display: block;
}

/* ── Topbar ───────────────────────────────────────── */

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--bg);
    border-bottom: var(--rule);
}

.topbar-inner {
    width: min(1080px, 92vw);
    margin: 0 auto;
    padding: 0.85rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.brand {
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: 0.12em;
    text-decoration: none;
    text-transform: uppercase;
    color: var(--ink);
}

.brand::before {
    content: "⬡ ";
    color: var(--accent);
    font-style: normal;
    letter-spacing: 0;
}

.nav-links {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.35rem 0.7rem;
    border: 1px solid transparent;
    color: var(--muted);
    transition: border-color 0.15s, color 0.15s;
}

.nav-links a:hover {
    border-color: var(--border);
    color: var(--ink);
}

/* ── Cards ────────────────────────────────────────── */

.card {
    border: var(--rule);
    background: var(--surface);
}

/* ── Hero ─────────────────────────────────────────── */

.hero {
    display: grid;
    grid-template-columns: 1.35fr 1fr;
    gap: 0;
    margin-top: 2rem;
    border: var(--rule);
}

.hero-copy {
    padding: 2.4rem 2rem;
    border: none;
    border-right: var(--rule);
}

.hero-panel {
    padding: 1.6rem;
    border: none;
    background: var(--bg-1);
    display: grid;
    gap: 0;
    align-content: start;
}

.chip {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--muted);
    padding: 0.25rem 0.65rem;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 0.9rem;
}

.chip::before {
    content: "— ";
    color: var(--accent);
    font-weight: 400;
}

h1,
h2,
h3 {
    line-height: 1.05;
    margin-top: 0;
}

h1 {
    margin: 0 0 0.75rem;
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -0.025em;
}

.hero p {
    margin: 0;
    color: var(--muted);
    max-width: 52ch;
    font-size: 0.98rem;
}

.cta {
    margin-top: 1.8rem;
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.5rem;
    padding: 0 1.1rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-decoration: none;
    text-transform: uppercase;
    border: var(--rule);
    transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.button.primary {
    background: var(--accent);
    color: var(--surface);
    border-color: var(--accent);
}

.button.primary:hover {
    background: var(--ink);
    border-color: var(--ink);
}

.button.secondary {
    background: transparent;
    color: var(--ink);
}

.button.secondary:hover {
    background: var(--ink);
    color: var(--surface);
}

/* ── Metrics ──────────────────────────────────────── */

.metric {
    padding: 1.3rem 1.4rem;
    border-bottom: var(--rule);
}

.metric:last-child {
    border-bottom: none;
}

.metric strong {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
    display: block;
    letter-spacing: -0.03em;
    color: var(--accent);
}

.metric span {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    margin-top: 0.3rem;
    display: block;
}

/* ── Sections ─────────────────────────────────────── */

.section {
    margin-top: 1.5rem;
    padding: 0;
}

.section-header {
    padding: 1.2rem 1.6rem;
    border-bottom: var(--rule);
    display: flex;
    align-items: baseline;
    gap: 1rem;
}

.section-index {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    min-width: 2.4rem;
}

.section-title {
    margin: 0;
    font-size: clamp(1.25rem, 2.2vw, 1.75rem);
    font-weight: 800;
    letter-spacing: -0.01em;
}

.section-body {
    padding: 1.4rem 1.6rem;
}

.section-lead {
    color: var(--muted);
    margin: 0 0 1.4rem;
    font-size: 0.93rem;
    max-width: 64ch;
}

/* ── Features grid ────────────────────────────────── */

.grid {
    display: grid;
    gap: 0;
}

.grid.features {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: var(--rule);
}

.feature {
    padding: 1.2rem;
    border-right: var(--rule);
}

.feature:last-child {
    border-right: none;
}

.feature-label {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.feature h3 {
    font-size: 0.98rem;
    font-weight: 800;
    margin-bottom: 0.4rem;
    letter-spacing: -0.01em;
}

.feature p {
    margin: 0;
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.55;
}

/* ── Architecture flow ────────────────────────────── */

.arch-flow {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: var(--rule);
    gap: 0;
}

.arch-step {
    padding: 1.3rem 1.2rem;
    border-right: var(--rule);
    position: relative;
}

.arch-step:last-child {
    border-right: none;
}

.arch-step::after {
    content: "→";
    position: absolute;
    right: -0.85rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    font-weight: 800;
    color: var(--accent-soft);
    z-index: 1;
    pointer-events: none;
}

.arch-step:last-child::after {
    display: none;
}

.arch-num {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.4rem;
}

.arch-step h3 {
    font-size: 0.95rem;
    font-weight: 800;
    margin-bottom: 0.35rem;
}

.arch-step p {
    margin: 0;
    color: var(--muted);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* ── Code block ───────────────────────────────────── */

.code {
    font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
    background: var(--ink);
    color: #ede8f5;
    border: var(--rule);
    padding: 1.2rem;
    overflow-x: auto;
    font-size: 0.86rem;
    line-height: 1.7;
}

.code pre {
    margin: 0;
}

.code .cmt {
    color: var(--accent-soft);
}

/* ── Stack table ──────────────────────────────────── */

.table-wrap {
    overflow-x: auto;
    border: var(--rule);
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 420px;
    background: var(--surface);
}

th,
td {
    padding: 0.65rem 1rem;
    text-align: left;
    border-bottom: 1.5px solid var(--border-soft);
    font-size: 0.86rem;
}

th {
    color: var(--muted);
    font-weight: 700;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: var(--bg-1);
    border-bottom: var(--rule);
}

tr:last-child td {
    border-bottom: none;
}

td code {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.82em;
    background: var(--bg-1);
    border: 1px solid var(--border-soft);
    padding: 0.1em 0.38em;
    color: var(--accent);
}

/* ── Note ─────────────────────────────────────────── */

.note {
    margin-top: 1rem;
    color: var(--muted);
    font-size: 0.83rem;
}

.note code {
    font-family: "JetBrains Mono", monospace;
    background: var(--bg-1);
    border: 1px solid var(--border-soft);
    padding: 0.1em 0.4em;
    font-size: 0.85em;
    color: var(--ink);
}

/* ── Lifecycle strip ──────────────────────────────── */

.lifecycle {
    display: flex;
    border-top: var(--rule);
    overflow: hidden;
}

.lc-stage {
    flex: 1;
    padding: 0.9rem 1rem;
    border-right: var(--rule);
    text-align: center;
    position: relative;
}

.lc-stage:last-child {
    border-right: none;
}

.lc-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-bottom: 0.5rem;
    background: var(--muted);
}

.lc-dot.born    { background: #a78bfa; }
.lc-dot.active  { background: #6d28d9; }
.lc-dot.dormant { background: #c4b5fd; }
.lc-dot.archive { background: #7a6d8a; }
.lc-dot.dead    { background: #1a1320; }

.lc-name {
    display: block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink);
}

.lc-desc {
    display: block;
    font-size: 0.72rem;
    color: var(--muted);
    margin-top: 0.2rem;
    line-height: 1.4;
}

/* ── Footer ───────────────────────────────────────── */

.footer {
    margin-top: 3rem;
    padding-top: 1.2rem;
    border-top: var(--rule);
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.footer a {
    color: var(--ink);
    text-decoration: none;
    border-bottom: 1px solid var(--border-soft);
    transition: color 0.15s, border-color 0.15s;
}

.footer a:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.footer-mark {
    color: var(--accent);
    font-size: 1rem;
}

/* ── Responsive ───────────────────────────────────── */

@media (max-width: 860px) {
    .hero {
        grid-template-columns: 1fr;
    }

    .hero-copy {
        border-right: none;
        border-bottom: var(--rule);
    }

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

    .feature {
        border-right: none;
        border-bottom: var(--rule);
    }

    .feature:last-child {
        border-bottom: none;
    }

    .arch-flow {
        grid-template-columns: 1fr;
    }

    .arch-step {
        border-right: none;
        border-bottom: var(--rule);
    }

    .arch-step:last-child {
        border-bottom: none;
    }

    .arch-step::after {
        content: "↓";
        right: auto;
        left: 1rem;
        top: auto;
        bottom: -0.9rem;
        transform: none;
    }

    .lifecycle {
        flex-direction: column;
    }

    .lc-stage {
        border-right: none;
        border-bottom: var(--rule);
        text-align: left;
        display: flex;
        align-items: center;
        gap: 0.8rem;
        padding: 0.7rem 1rem;
    }

    .lc-stage:last-child {
        border-bottom: none;
    }

    .lc-dot {
        margin-bottom: 0;
        flex-shrink: 0;
    }

    .footer {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}