:root {
    --ink: #0f172a;
    --muted: #475569;
    --paper: #f8fafc;
    --panel: #ffffff;
    --line: #e2e8f0;
    --line-strong: #cbd5e1;
    --navy: #2563eb;
    --navy-hover: #1d4ed8;
    --hero: #0f172a;
    --hero-muted: #cbd5e1;
    --bar: rgba(2, 6, 23, 0.78);
    --max: 68rem;
    --measure: 38rem;
}

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

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 1.0625rem;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; }

.wrap {
    width: min(calc(100% - 2.5rem), var(--max));
    margin-inline: auto;
}

::selection {
    background: #dbeafe;
    color: var(--ink);
}

.site-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 40;
    background: var(--bar);
    border-bottom: 1px solid rgba(148, 163, 184, 0.18);
    backdrop-filter: saturate(1.2) blur(12px);
    color: #e2e8f0;
}

.bar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    min-height: 4.25rem;
}

.wordmark {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.wordmark img {
    height: 26px;
    width: auto;
}

.nav-toggle {
    display: none;
    font: inherit;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: none;
    border: 0;
    padding: 0.4rem 0;
    cursor: pointer;
    color: #e2e8f0;
}

#nav-on {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.75rem;
}

.site-nav a {
    text-decoration: none;
    font-size: 0.9rem;
    color: #cbd5e1;
}

.site-nav a:hover,
.site-nav a.is-on { color: #fff; }

.site-nav .btn,
.site-nav .btn:hover,
.site-nav .btn.is-on {
    color: #fff;
    padding: 0.55rem 0.95rem;
    font-size: 0.82rem;
}

button.btn {
    font: inherit;
    cursor: pointer;
}

button.btn:disabled {
    opacity: 0.55;
    cursor: wait;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.35rem;
    background: var(--navy);
    color: #fff;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.01em;
    border: 1px solid var(--navy);
    border-radius: 0.5rem;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn:hover { background: var(--navy-hover); border-color: var(--navy-hover); }

.btn-ghost {
    background: transparent;
    color: inherit;
    border-color: currentColor;
}

.btn-ghost:hover {
    background: #fff;
    color: var(--ink);
    border-color: #fff;
}

.btn-light {
    background: #fff;
    color: var(--ink);
    border-color: #fff;
}

.btn-light:hover {
    background: transparent;
    color: #fff;
}

.hero,
.page-hero {
    position: relative;
    isolation: isolate;
    background: var(--hero);
    color: #fff;
}

.hero::before,
.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -2;
    background: url("../hero-bg.png") center / cover no-repeat;
    opacity: 0.6;
}

.hero::after,
.page-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(to bottom, rgba(15, 23, 42, 0.7), rgba(15, 23, 42, 0.55) 45%, rgba(15, 23, 42, 0.92));
}

.hero { padding: 8.75rem 0 6rem; }

.hero .kicker,
.page-hero .kicker {
    color: #93c5fd;
    margin-bottom: 1.5rem;
}

.hero h1,
.page-hero h1 {
    font-weight: 700;
    letter-spacing: -0.03em;
}

.hero h1 {
    font-size: clamp(2.4rem, 5.4vw, 4.1rem);
    line-height: 1.1;
    max-width: 16ch;
    margin: 0 0 1.5rem;
}

.hero .lead,
.page-hero .lead {
    color: var(--hero-muted);
}

.hero .lead {
    max-width: 36rem;
    font-size: 1.15rem;
    margin: 0 0 2.25rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem 1.25rem;
    align-items: center;
}

.hero-actions a:not(.btn) {
    color: var(--hero-muted);
    text-decoration: none;
    font-size: 0.95rem;
    border-bottom: 1px solid #64748b;
    padding-bottom: 0.1rem;
}

.hero-actions a:not(.btn):hover { color: #fff; border-color: #fff; }

.kicker {
    margin: 0;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--navy);
}

.page-hero {
    padding: 8rem 0 3.5rem;
}

.page-hero h1 {
    font-size: clamp(2.1rem, 4vw, 3.2rem);
    line-height: 1.15;
    max-width: 18ch;
    margin: 0.85rem 0 1.1rem;
}

.page-hero .lead {
    max-width: var(--measure);
    margin: 0;
    font-size: 1.15rem;
}

.section { padding: 5rem 0; }

.section-head {
    max-width: 36rem;
    margin-bottom: 3rem;
}

.section-head.wide { max-width: none; }

.section-head h2,
.block h2 {
    font-weight: 700;
    font-size: clamp(1.7rem, 2.6vw, 2.2rem);
    line-height: 1.2;
    letter-spacing: -0.025em;
    margin: 0.4rem 0 0.85rem;
}

.section-head p,
.prose-p {
    margin: 0;
    color: var(--muted);
}

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.trio,
.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 1px solid var(--line);
}

.card,
.step {
    padding: 1.75rem 1.6rem 1.9rem 0;
    border-bottom: 1px solid var(--line);
}

.trio .card + .card,
.steps .step + .step {
    padding-left: 1.6rem;
    border-left: 1px solid var(--line);
}

.num {
    display: block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--navy);
    margin-bottom: 1rem;
}

.card h3,
.step h3,
.block h3 {
    font-weight: 650;
    font-size: 1.25rem;
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin: 0 0 0.65rem;
}

.card p,
.step p,
.block p,
.feature p {
    margin: 0;
    color: var(--muted);
    font-size: 0.98rem;
}

.rail {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    padding: 1.15rem 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    font-size: 0.92rem;
}

.rail span { color: var(--muted); }

.rail strong {
    font-weight: 600;
    color: var(--ink);
}

.band {
    background: var(--panel);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.ink-band {
    background: var(--hero);
    color: #f8fafc;
    padding: 5rem 0;
}

.ink-band h2 {
    font-weight: 700;
    font-size: clamp(1.8rem, 3vw, 2.3rem);
    letter-spacing: -0.025em;
    max-width: 16ch;
    margin: 0 0 0.9rem;
}

.ink-band p {
    max-width: 34rem;
    color: #94a3b8;
    margin: 0 0 1.75rem;
}

.ink-band .text-link {
    color: #e2e8f0;
    border-color: #475569;
}

.ink-band .text-link:hover { border-color: #fff; }

.ink-band .btn + p { margin-top: 1.4rem; }

.list {
    list-style: none;
    margin: 1.25rem 0 0;
    padding: 0;
}

.list li {
    padding: 0.7rem 0;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.98rem;
}

.list li:last-child { border-bottom: 1px solid var(--line); }

.figure {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 0.75rem;
    padding: 1.25rem 1.35rem;
}

.figure .cap {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--navy);
    margin-bottom: 0.85rem;
}

.figure pre {
    margin: 0;
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.82rem;
    line-height: 1.7;
    color: var(--ink);
    white-space: pre-wrap;
}

.figure .note {
    margin-top: 0.9rem;
    font-size: 0.85rem;
    color: var(--muted);
}

.flow {
    margin: 0;
    padding: 0;
    list-style: none;
}

.flow li {
    padding: 0.75rem 0;
    border-top: 1px solid var(--line);
    font-size: 0.95rem;
}

.flow li:last-child { border-bottom: 1px solid var(--line); }

.features {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2.5rem 2rem;
}

.feature h3 {
    font-size: 0.95rem;
    font-weight: 650;
    margin: 0 0 0.45rem;
}

.matrix {
    width: 100%;
    border-collapse: collapse;
}

.matrix th,
.matrix td {
    text-align: left;
    vertical-align: top;
    padding: 1rem 1rem 1rem 0;
    border-top: 1px solid var(--line);
    font-size: 0.92rem;
}

.matrix th {
    font-weight: 650;
    width: 34%;
}

.matrix td { color: var(--muted); }

.matrix .cov {
    display: block;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--navy);
    margin-top: 0.35rem;
    font-weight: 600;
}

.docs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    border-top: 1px solid var(--line);
}

.doc {
    padding: 1.4rem 1.4rem 1.4rem 0;
    border-bottom: 1px solid var(--line);
}

.docs .doc:nth-child(even) {
    padding-left: 1.4rem;
    border-left: 1px solid var(--line);
}

.doc h3 {
    font-size: 1rem;
    font-weight: 650;
    margin: 0 0 0.35rem;
}

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

.why p {
    margin: 0;
    padding: 1.1rem 0;
    border-top: 1px solid var(--line);
    color: var(--muted);
}

.why p:last-child { border-bottom: 1px solid var(--line); }

.values {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 2rem;
}

.values h3 {
    font-weight: 650;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
    margin: 0 0 0.5rem;
}

.values p {
    margin: 0;
    color: var(--muted);
    font-size: 0.98rem;
}

.form {
    max-width: 36rem;
}

label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 0.4rem;
}

.field { margin-bottom: 1.15rem; }

.row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

input, select, textarea {
    width: 100%;
    font: inherit;
    color: var(--ink);
    background: var(--panel);
    border: 1px solid var(--line-strong);
    padding: 0.7rem 0.8rem;
    border-radius: 0.5rem;
    appearance: none;
    -webkit-appearance: none;
}

select {
    background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%), linear-gradient(135deg, var(--muted) 50%, transparent 50%);
    background-position: calc(100% - 16px) calc(50% - 2px), calc(100% - 11px) calc(50% - 2px);
    background-size: 5px 5px, 5px 5px;
    background-repeat: no-repeat;
    padding-right: 2rem;
}

input:focus, select:focus, textarea:focus {
    outline: 2px solid #93c5fd;
    outline-offset: 1px;
    border-color: var(--navy);
}

.hp { position: absolute; left: -9999px; }

.form-status { margin-top: 1rem; font-size: 0.95rem; }
.form-status.ok { color: #047857; }
.form-status.err { color: #b91c1c; }
.form-status:not(.ok):not(.err) { display: none; }

.posts { display: grid; gap: 1.25rem; }

.post {
    display: block;
    text-decoration: none;
    padding: 2rem 2.15rem;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 0.75rem;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
    transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.post:hover {
    border-color: #bfdbfe;
    box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
}

.post:hover h2 { color: var(--navy); }

.post .meta {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--navy);
    margin-bottom: 0.7rem;
}

.post h2 {
    font-weight: 700;
    font-size: clamp(1.35rem, 2vw, 1.7rem);
    line-height: 1.25;
    letter-spacing: -0.02em;
    margin: 0 0 0.7rem;
}

.post p { margin: 0; color: var(--muted); font-size: 0.98rem; }

.post .more {
    display: inline-block;
    margin-top: 1.15rem;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--navy);
}

.article {
    position: relative;
    padding: 8rem 0 5rem;
}

.article::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4.5rem;
    background:
        linear-gradient(to bottom, rgba(15, 23, 42, 0.72), rgba(15, 23, 42, 0.92)),
        url("../hero-bg.png") center / cover no-repeat;
}

.article-head { max-width: 40rem; margin-bottom: 2.5rem; }

.article-head .meta {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--navy);
}

.article-head .meta a { text-decoration: none; }

.article-head h1 {
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 2.7rem);
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin: 0.7rem 0 1rem;
}

.article-head .stand { color: var(--muted); font-size: 1.15rem; margin: 0; }

.prose {
    max-width: 40rem;
}

.prose p { margin: 0 0 1.15rem; }

.prose h2 {
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.02em;
    margin: 2.4rem 0 0.8rem;
}

.prose h3 {
    font-size: 1.05rem;
    font-weight: 650;
    margin: 1.8rem 0 0.55rem;
}

.prose ul, .prose ol { margin: 0 0 1.15rem; padding-left: 1.2rem; color: var(--muted); }

.prose li { margin-bottom: 0.35rem; }

.prose ol {
    list-style: none;
    padding-left: 0;
    counter-reset: step;
}

.prose ol li {
    counter-increment: step;
    position: relative;
    padding-left: 2.4rem;
    margin-bottom: 0.85rem;
}

.prose ol li::before {
    content: counter(step, decimal-leading-zero);
    position: absolute;
    left: 0;
    top: 0.2rem;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--navy);
}

.prose code {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.88em;
}

.line {
    margin: 1.6rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    font-weight: 600;
    font-size: 1.05rem;
}

.highlight {
    margin: 0 0 2rem;
    padding: 1.35rem 0;
    border-top: 2px solid var(--navy);
    border-bottom: 1px solid var(--line);
}

.highlight .big {
    font-size: 1.35rem;
    font-weight: 700;
    margin: 0 0 0.45rem;
}

.highlight p { margin: 0; }

.prose pre {
    background: var(--hero);
    color: #e2e8f0;
    padding: 1.1rem 1.2rem;
    overflow-x: auto;
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.78rem;
    line-height: 1.55;
    margin: 0 0 1.2rem;
    border-radius: 0.75rem;
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 1.5rem 0;
}

.stat {
    border-top: 1px solid var(--line);
    padding-top: 0.7rem;
}

.stat b {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--ink);
}

.stat span {
    display: block;
    font-size: 0.8rem;
    color: var(--muted);
    margin-top: 0.25rem;
}

.callout {
    border-left: 3px solid var(--navy);
    padding: 0.2rem 0 0.2rem 1.1rem;
    margin: 1.6rem 0;
}

.back {
    display: inline-block;
    margin-top: 2.5rem;
    font-size: 0.9rem;
    color: var(--navy);
    text-decoration: none;
    border-bottom: 1px solid #bfdbfe;
}

.back:hover { border-color: var(--navy); }

.text-link {
    color: var(--navy);
    text-decoration: none;
    border-bottom: 1px solid #bfdbfe;
}

.text-link:hover { border-color: var(--navy); }

.site-foot {
    background: #020617;
    color: #94a3b8;
    border-top: 0;
    padding: 3.5rem 0 2.5rem;
}

.foot-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2.5rem;
}

.foot-brand p {
    max-width: 22rem;
    color: #94a3b8;
    font-size: 0.95rem;
    margin: 0.9rem 0 0;
}

.site-foot h4 {
    margin: 0 0 0.8rem;
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-weight: 600;
    color: #fff;
}

.site-foot ul { list-style: none; margin: 0; padding: 0; }

.site-foot li { margin-bottom: 0.4rem; }

.site-foot a {
    text-decoration: none;
    color: #94a3b8;
    font-size: 0.92rem;
}

.site-foot a:hover { color: #fff; }

.legal {
    margin-top: 2.5rem;
    padding-top: 1.2rem;
    border-top: 1px solid #1e293b;
    font-size: 0.8rem;
    color: #64748b;
}

@media (max-width: 860px) {
    .nav-toggle { display: block; }

    .site-nav {
        display: none;
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 0.5rem 1.25rem 1.1rem;
        background: #020617;
        border-bottom: 1px solid #1e293b;
    }

    #nav-on:checked ~ .bar-inner .site-nav { display: flex; }

    .site-nav a {
        display: block;
        width: 100%;
        padding: 0.7rem 0;
        border-bottom: 1px solid #1e293b;
    }

    .site-nav .btn {
        width: auto;
        margin-top: 0.8rem;
        border-bottom: 0;
    }

    .split,
    .trio,
    .steps,
    .features,
    .docs,
    .values,
    .row-2,
    .foot-grid,
    .stats { grid-template-columns: 1fr; }

    .trio .card + .card,
    .steps .step + .step,
    .docs .doc:nth-child(even) {
        padding-left: 0;
        border-left: 0;
    }

    .rail { flex-direction: column; gap: 0.65rem; }

    .hero { padding: 7.25rem 0 4rem; }
    .page-hero { padding: 6.75rem 0 3rem; }
    .article { padding: 6.75rem 0 4rem; }
}