:root {
    --canvas: #f6f3ec;
    --paper: #fffdf8;
    --ink: #24231f;
    --body: #5d5a52;
    --muted: #817c70;
    --line: #ded8ca;
    --soft: #ece5d6;
    --primary: #9c5c2f;
    --primary-dark: #70401f;
    --mint: #d8e6da;
    --blue: #dbe5ef;
    --rose: #ead8d1;
    --radius: 18px;
    --shadow: 0 18px 45px rgba(54, 43, 28, 0.08);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--canvas);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
}

a {
    color: inherit;
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 72px;
    padding: 14px clamp(18px, 4vw, 56px);
    background: rgba(246, 243, 236, 0.94);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(16px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 750;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    color: #fff;
    background: var(--ink);
    border-radius: 12px;
    letter-spacing: 0.04em;
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.primary-nav a,
.nav-toggle,
.button,
.text-link,
.card-link {
    min-height: 44px;
}

.primary-nav a {
    display: inline-flex;
    align-items: center;
    padding: 10px 14px;
    color: var(--body);
    border-radius: 999px;
    text-decoration: none;
}

.primary-nav a.active,
.primary-nav a:focus-visible {
    color: var(--ink);
    background: var(--soft);
    outline: none;
}

.nav-toggle {
    display: none;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 0 16px;
    background: var(--paper);
    color: var(--ink);
}

main {
    padding: 0 clamp(18px, 4vw, 56px) 80px;
}

.hero-grid,
.page-hero,
.section,
.split-band,
.evidence-band,
.matrix-band,
.related-block {
    max-width: 1180px;
    margin: 0 auto;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(280px, 0.98fr);
    gap: clamp(24px, 5vw, 72px);
    align-items: center;
    padding: clamp(48px, 8vw, 100px) 0 64px;
}

.hero-copy h1,
.page-hero h1 {
    max-width: 850px;
    margin: 0;
    font-size: clamp(2.45rem, 7vw, 5.7rem);
    line-height: 0.96;
    letter-spacing: -0.055em;
}

.hero-copy p:not(.eyebrow),
.page-hero p:not(.eyebrow),
.section-heading p,
.split-band p,
.evidence-band p,
.matrix-band p {
    color: var(--body);
    font-size: clamp(1rem, 1.4vw, 1.12rem);
}

.eyebrow {
    margin: 0 0 14px;
    color: var(--primary-dark);
    font-size: 0.78rem;
    font-weight: 760;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 28px;
}

.button,
.text-link,
.card-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

.button {
    padding: 12px 20px;
    color: #fff;
    background: var(--primary);
    border-radius: 12px;
    font-weight: 700;
}

.text-link,
.card-link {
    color: var(--primary-dark);
    font-weight: 700;
}

.image-panel {
    margin: 0;
    overflow: hidden;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 28px;
    box-shadow: var(--shadow);
}

.image-panel img {
    width: 100%;
    height: 420px;
    object-fit: cover;
}

.image-panel.small img {
    height: 300px;
}

.image-panel figcaption {
    padding: 10px 16px;
    color: var(--muted);
    font-size: 0.84rem;
}

.section {
    padding: 72px 0;
}

.section.compact {
    padding: 36px 0;
}

.section-heading {
    max-width: 720px;
    margin-bottom: 28px;
}

.section-heading h2,
.split-band h2,
.evidence-band h2,
.matrix-band h2,
.related-block h2 {
    margin: 0;
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.05;
    letter-spacing: -0.04em;
}

.card-grid,
.skill-grid,
.glossary-grid,
.related-grid,
.matrix-grid {
    display: grid;
    gap: 18px;
}

.card-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

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

.matrix-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.info-card,
.skill-card,
.glossary-card,
.related-card,
.pathway-card,
.step-card,
.note-stack article,
.matrix-grid article,
.question-box,
details {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}

.info-card,
.skill-card,
.glossary-card,
.note-stack article,
.matrix-grid article,
.question-box {
    padding: 22px;
}

.info-card h3,
.skill-card h2,
.glossary-card h2,
.pathway-card h2,
.step-card h2,
.matrix-grid h3,
.note-stack h3 {
    margin: 0 0 10px;
    line-height: 1.18;
}

.info-card p,
.skill-card p,
.glossary-card p,
.pathway-card p,
.step-card p,
.matrix-grid p,
.note-stack p {
    color: var(--body);
}

.tag-list,
.check-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 18px 0;
    padding: 0;
    list-style: none;
}

.tag-list li,
.check-list li {
    padding: 6px 10px;
    background: var(--blue);
    border-radius: 999px;
    color: var(--ink);
    font-size: 0.88rem;
}

.check-list li {
    background: var(--mint);
}

.split-band,
.matrix-band,
.evidence-band {
    display: grid;
    gap: 24px;
    align-items: center;
    margin-top: 24px;
    margin-bottom: 40px;
    padding: clamp(28px, 5vw, 48px);
    background: var(--soft);
    border-radius: 30px;
}

.split-band,
.matrix-band {
    grid-template-columns: 0.9fr 1.1fr;
}

.evidence-band {
    grid-template-columns: 0.95fr 1.05fr;
}

.evidence-band.reverse {
    grid-template-columns: 1.05fr 0.95fr;
}

.note-stack {
    display: grid;
    gap: 16px;
}

.page-hero {
    padding: 52px 0 28px;
}

.breadcrumbs {
    max-width: 1180px;
    margin: 24px auto 0;
    color: var(--muted);
    font-size: 0.94rem;
}

.breadcrumbs a {
    color: var(--primary-dark);
    text-decoration: none;
}

.toc {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.toc a {
    padding: 10px 14px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 999px;
    text-decoration: none;
}

.pathway-list {
    display: grid;
    gap: 18px;
}

.pathway-card {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.9fr);
    gap: 24px;
    padding: 26px;
}

.question-box {
    background: var(--blue);
}

.question-box ul {
    margin: 0;
    padding-left: 20px;
}

.timeline-section {
    display: grid;
    gap: 16px;
}

.step-card {
    display: grid;
    grid-template-columns: 74px minmax(0, 1fr);
    gap: 18px;
    padding: 22px;
}

.step-number {
    display: grid;
    width: 58px;
    height: 58px;
    place-items: center;
    color: #fff;
    background: var(--ink);
    border-radius: 18px;
    font-size: 1.4rem;
    font-weight: 800;
}

.accordion-list {
    display: grid;
    gap: 12px;
}

details {
    padding: 18px 20px;
}

summary {
    cursor: pointer;
    font-weight: 750;
}

details p {
    color: var(--body);
}

.related-block {
    padding: 52px 0 0;
}

.related-card {
    min-height: 92px;
    padding: 22px;
    background: var(--ink);
    color: #fff;
    border-radius: var(--radius);
    font-size: 1.1rem;
}

.site-footer {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 24px;
    padding: 36px clamp(18px, 4vw, 56px);
    color: #eee9dd;
    background: var(--ink);
}

.site-footer p {
    max-width: 620px;
    color: #c9c1b1;
}

.site-footer nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-content: start;
}

.site-footer a {
    color: #fff;
    text-decoration: none;
}

@media (max-width: 1100px) {
    .card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 780px) {
    .site-header {
        align-items: flex-start;
    }

    .nav-toggle {
        display: inline-flex;
        align-items: center;
    }

    .primary-nav {
        position: absolute;
        top: 72px;
        right: 18px;
        left: 18px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 14px;
        background: var(--paper);
        border: 1px solid var(--line);
        border-radius: 18px;
        box-shadow: var(--shadow);
    }

    .primary-nav.open {
        display: flex;
    }

    .hero-grid,
    .split-band,
    .matrix-band,
    .evidence-band,
    .evidence-band.reverse,
    .pathway-card,
    .site-footer {
        grid-template-columns: 1fr;
    }

    .card-grid,
    .skill-grid,
    .glossary-grid,
    .matrix-grid,
    .related-grid {
        grid-template-columns: 1fr;
    }

    .image-panel img,
    .image-panel.small img {
        height: 260px;
    }
}