@import url('https://api.fontshare.com/v2/css?f[]=general-sans@500,600,400,700,300,200&display=swap');

:root {
    --bg: #050505;
    --paper: #0b0c0b;
    --ink: #f6f3ea;
    --muted: rgba(246, 243, 234, 0.72);
    --faint: rgba(246, 243, 234, 0.48);
    --line: rgba(246, 243, 234, 0.16);
    --line-strong: rgba(246, 243, 234, 0.32);
    --gold: #d5b875;
    --green: #8ebf9a;
    --danger: #d88a78;
    --font-main: 'General Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-main);
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    background:
        linear-gradient(180deg, rgba(213, 184, 117, 0.08), transparent 320px),
        radial-gradient(circle at 50% -10%, rgba(142, 191, 154, 0.16), transparent 38%),
        var(--bg);
    color: var(--ink);
    letter-spacing: 0;
}

a {
    color: inherit;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px clamp(18px, 4vw, 54px);
    border-bottom: 1px solid rgba(246, 243, 234, 0.1);
    background: rgba(5, 5, 5, 0.82);
    backdrop-filter: blur(18px);
}

.logo-link {
    display: inline-flex;
    align-items: center;
}

.logo-link img {
    width: auto;
    height: 34px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0 16px;
    border: 1px solid rgba(246, 243, 234, 0.18);
    border-radius: 999px;
    color: var(--ink);
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.04);
}

.nav-link.secondary {
    color: var(--muted);
}

.page-shell {
    width: min(100%, 920px);
    margin: 0 auto;
    padding: 46px clamp(18px, 5vw, 44px) 80px;
}

.hero {
    padding: 28px 0 36px;
    border-bottom: 1px solid var(--line);
}

.eyebrow {
    margin: 0 0 18px;
    color: var(--gold);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

h1,
h2,
h3 {
    margin: 0;
    font-weight: 500;
    letter-spacing: 0;
}

h1 {
    max-width: 760px;
    font-size: clamp(42px, 9vw, 82px);
    line-height: 0.98;
}

.lede {
    max-width: 720px;
    margin: 24px 0 0;
    color: var(--muted);
    font-size: clamp(18px, 4vw, 24px);
    line-height: 1.45;
}

.article {
    padding-top: 20px;
}

.article section {
    padding: 34px 0;
    border-bottom: 1px solid var(--line);
}

.article h2 {
    margin-bottom: 18px;
    color: var(--ink);
    font-size: clamp(25px, 6vw, 40px);
    line-height: 1.08;
}

.article h3 {
    margin: 28px 0 12px;
    color: var(--ink);
    font-size: 18px;
    line-height: 1.2;
}

p,
li {
    color: var(--muted);
    font-size: 16px;
    line-height: 1.74;
}

p {
    margin: 0 0 16px;
}

strong {
    color: var(--ink);
    font-weight: 650;
}

ul,
ol {
    margin: 14px 0 0;
    padding-left: 22px;
}

li {
    margin: 9px 0;
}

.quote-line {
    margin-top: 18px;
    color: var(--ink);
    font-size: 19px;
}

.compact-list li {
    margin: 7px 0;
}

.guide-shell {
    width: min(100%, 1040px);
}

.guide-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 18px;
}

.guide-grid.two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.guide-card,
.guide-table div {
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
}

.guide-card {
    padding: 16px;
}

.guide-card span,
.guide-table strong {
    color: var(--gold);
    display: block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.guide-card h3 {
    margin: 0 0 9px;
}

.guide-card p,
.guide-card li {
    font-size: 15px;
    line-height: 1.55;
}

.guide-card ul {
    margin-top: 8px;
}

.guide-table {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.guide-table div {
    display: grid;
    gap: 8px;
    grid-template-columns: 190px minmax(0, 1fr);
    padding: 14px 16px;
}

.guide-table strong {
    margin: 0;
}

.guide-table span {
    color: var(--muted);
    line-height: 1.55;
}

.manual-states {
    margin-top: 20px;
}

.manual-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-top: 20px;
    padding: 18px;
    border: 1px solid rgba(213, 184, 117, 0.3);
    border-radius: 18px;
    background: rgba(213, 184, 117, 0.08);
}

.manual-cta span {
    display: block;
    margin-bottom: 6px;
    color: var(--gold);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.manual-cta p {
    margin: 0;
    font-size: 15px;
    line-height: 1.55;
}

.manual-cta .nav-link {
    flex: 0 0 auto;
}

.system-diagram {
    margin: 24px 0 8px;
    padding: 18px;
    border: 1px solid rgba(213, 184, 117, 0.26);
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.02));
}

.diagram-title {
    margin: 0 0 16px;
    color: var(--faint);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-align: center;
    text-transform: uppercase;
}

.flow {
    display: grid;
    gap: 10px;
}

.flow-card {
    position: relative;
    padding: 16px 16px 15px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(5, 5, 5, 0.6);
}

.compact-diagram {
    max-width: 720px;
}

.flow-card.primary {
    border-color: rgba(213, 184, 117, 0.42);
}

.flow-card.quant {
    border-style: dashed;
    border-color: rgba(142, 191, 154, 0.52);
}

.flow-card.risk {
    border-color: rgba(216, 138, 120, 0.38);
}

.flow-kicker {
    display: block;
    margin-bottom: 5px;
    color: var(--gold);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.flow-name {
    display: block;
    color: var(--ink);
    font-size: 18px;
    font-weight: 650;
    line-height: 1.25;
}

.flow-detail {
    display: block;
    margin-top: 6px;
    color: var(--faint);
    font-size: 13px;
    line-height: 1.45;
}

.arrow {
    color: var(--line-strong);
    font-size: 22px;
    line-height: 1;
    text-align: center;
}

.side-input {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 10px 0;
}

.side-label {
    margin: 0;
    color: var(--faint);
    font-size: 13px;
    line-height: 1.5;
    text-align: center;
}

.return-loop {
    margin-top: 12px;
    padding: 14px;
    border: 1px dashed rgba(246, 243, 234, 0.22);
    border-radius: 14px;
    color: var(--faint);
    font-size: 13px;
    line-height: 1.55;
    text-align: center;
}

.final-line {
    color: var(--ink);
    font-size: 22px;
    line-height: 1.35;
}

@media (max-width: 620px) {
    .site-header {
        padding: 12px 16px;
    }

    .logo-link img {
        height: 27px;
    }

    .nav-links {
        gap: 7px;
    }

    .nav-link {
        min-height: 36px;
        padding: 0 12px;
        font-size: 12px;
    }

    .page-shell {
        padding-top: 28px;
    }

    .hero {
        padding-top: 18px;
    }

    .article section {
        padding: 28px 0;
    }

    .guide-grid,
    .guide-grid.two {
        grid-template-columns: 1fr;
    }

    .guide-table div {
        grid-template-columns: 1fr;
    }

    .manual-cta {
        align-items: flex-start;
        flex-direction: column;
    }

    p,
    li {
        font-size: 15px;
        line-height: 1.72;
    }

    .system-diagram {
        margin-left: -4px;
        margin-right: -4px;
        padding: 12px;
        border-radius: 18px;
    }

    .flow-card {
        padding: 14px;
        border-radius: 14px;
    }

    .flow-name {
        font-size: 16px;
    }

    .flow-detail {
        font-size: 12.5px;
    }
}