/* Fonts shared with the spine homepage. Loaded once here so every
   interior page inherits the same family without per-page <link> tags. */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,300;9..144,400;9..144,500;9..144,600;9..144,700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Surfaces */
    --bg: #0d1117;
    --bg-elevated: rgba(22, 25, 30, 0.88);
    --bg-soft: rgba(236, 230, 216, 0.04);
    --bg-panel: rgba(19, 22, 27, 0.78);

    /* Ink — primary text, with progressively dimmer tiers */
    --fg: #ece6d8;
    --ink-muted: rgba(236, 230, 216, 0.72);
    --ink-faint: rgba(236, 230, 216, 0.5);
    --ink-faintest: rgba(236, 230, 216, 0.12);
    --muted: var(--ink-muted);

    /* Accents — same palette as the spine page */
    --gold: #d4a76a;
    --gold-warm: #b8763a;
    --voice: #96b9cb;
    --build: #c78f7d;
    /* Backwards-compatible aliases for existing rules */
    --accent: var(--gold);
    --accent-strong: #e7b879;
    --accent-rose: var(--build);
    --accent-blue: var(--voice);

    /* Lines and rules */
    --border: rgba(236, 230, 216, 0.14);
    --border-strong: rgba(236, 230, 216, 0.28);
    --rule: rgba(236, 230, 216, 0.1);

    /* Effects */
    --shadow: 0 28px 80px rgba(0, 0, 0, 0.34);

    /* Layout */
    --max-width: 860px;
    --reading-width: 720px;
    --radius: 14px;

    /* Type — Fraunces for heads and prose, Inter for body UI,
       JetBrains Mono for technical labels and meta. */
    --serif: "Fraunces", "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
    --sans: "Inter", "Avenir Next", Avenir, "Segoe UI", system-ui, -apple-system, sans-serif;
    --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
}

/* Smooth crossfade between page navigations (Chrome/Edge 111+) */
@view-transition {
    navigation: auto;
}

* {
    box-sizing: border-box;
    min-width: 0; /* prevent flex/grid children from overflowing their container */
}

img,
video,
iframe,
audio {
    max-width: 100%;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    overflow-x: hidden;
    background: var(--bg);
    background-image:
        radial-gradient(circle at 80% 8%, rgba(184, 118, 58, 0.08), transparent 40%),
        radial-gradient(circle at 12% 92%, rgba(134, 167, 186, 0.06), transparent 40%);
    background-attachment: fixed;
    color: var(--fg);
    font-family: var(--sans);
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* The grid overlay and secondary radial gradients are removed —
   the spine page uses a quieter background and we want interior
   pages to feel like part of the same canvas. */

a {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid rgba(231, 184, 121, 0.35);
    transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, opacity 0.2s ease;
}

a:hover,
a:focus-visible {
    color: var(--accent-strong);
    border-bottom-color: rgba(231, 184, 121, 0.85);
}

:focus-visible {
    outline: 2px solid rgba(231, 184, 121, 0.8);
    outline-offset: 3px;
    border-radius: 4px;
}

header {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(18px);
    background: rgba(13, 17, 23, 0.76);
    border-bottom: 1px solid var(--rule);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.25rem;
    gap: 1rem;
}

.site-title {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    border-bottom: none;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--ink-muted);
}

.site-title-mark {
    width: 28px;
    height: 28px;
    border: 1px solid rgba(236, 230, 216, 0.5);
    display: grid;
    place-items: center;
    font-family: var(--serif);
    font-size: 16px;
    font-weight: 500;
    color: var(--fg);
    letter-spacing: 0;
    text-transform: none;
    flex-shrink: 0;
}

.site-title-name {
    color: var(--fg);
    font-family: var(--sans);
    font-weight: 600;
    font-size: 11px;
    letter-spacing: 0.06em;
}

.site-title-sub {
    color: var(--ink-muted);
    font-size: 11px;
}

.hamburger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.75rem;
    min-height: 2.75rem;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.02);
    color: var(--fg);
    font: inherit;
    font-size: 1.15rem;
    cursor: pointer;
    transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.hamburger:hover,
.hamburger:focus-visible {
    transform: translateY(-1px);
    border-color: var(--border-strong);
    background: rgba(255, 255, 255, 0.06);
}

#menu {
    display: grid;
    gap: 0.4rem;
    max-height: 0;
    overflow: hidden;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.25rem;
    transition: max-height 0.28s ease, padding-bottom 0.28s ease;
}

#menu.open {
    max-height: 16rem;
    padding-bottom: 1rem;
}

.nav-link {
    display: block;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border);
    border-bottom-width: 1px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom-style: solid;
}

.nav-link:hover,
.nav-link:focus-visible {
    background: rgba(239, 195, 127, 0.08);
}

.nav-link[aria-current="page"] {
    color: var(--accent-strong);
    border-color: var(--border-strong);
    background: rgba(231, 184, 121, 0.08);
}

.container {
    position: relative;
    z-index: 1;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 5.25rem 1.25rem 4.5rem;
}

.page-shell {
    display: grid;
    gap: 1.7rem;
}

section {
    margin: 0;
}

.hero {
    position: relative;
    padding: 2.25rem;
    border: 1px solid var(--ink-faintest);
    border-radius: var(--radius);
    background: rgba(236, 230, 216, 0.04);
    overflow: hidden;
}

.eyebrow {
    margin: 0 0 0.9rem;
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

h1,
h2,
h3,
summary,
.archive-title,
.section-heading,
.entry-title {
    font-family: var(--serif);
}

h1 {
    margin: 0;
    font-size: clamp(2.5rem, 6vw, 4.3rem);
    line-height: 0.98;
    font-weight: 600;
    letter-spacing: -0.03em;
    max-width: 12ch;
}

.tagline {
    max-width: 38rem;
    margin: 1rem 0 0;
    color: var(--muted);
    font-size: 1.08rem;
}

.intro-grid,
.archive-grid {
    display: grid;
    gap: 1.1rem;
}

.section-card,
.archive-card,
.content-panel,
.details-card {
    border: 1px solid var(--ink-faintest);
    border-radius: var(--radius);
    background: rgba(236, 230, 216, 0.04);
    transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.section-card:hover,
.archive-card:hover {
    border-color: var(--border-strong);
    background: rgba(236, 230, 216, 0.06);
    transform: translateY(-2px);
}

.section-card,
.archive-card,
.content-panel {
    padding: 1.65rem;
}

.section-card {
    display: grid;
    gap: 0.95rem;
}

.section-card p:last-child,
.archive-card p:last-child,
.content-panel p:last-child,
.details-body p:last-child {
    margin-bottom: 0;
}

.section-kicker,
.archive-meta,
.section-note,
.content-intro,
.entry-meta,
footer {
    color: var(--muted);
}

.section-kicker,
.archive-meta,
.entry-meta {
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.section-heading,
.archive-title,
.content-title {
    margin: 0;
    font-size: 1.62rem;
    line-height: 1.15;
    color: var(--fg);
}

.section-link,
.archive-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-weight: 600;
}

.section-link::after,
.archive-link::after {
    content: "->";
    font-size: 0.9em;
}

.section-link,
.archive-link,
.mode-link {
    border-bottom: none;
}

.section-card p,
.archive-card p,
.content-panel p {
    max-width: var(--reading-width);
}

.archive-list,
.content-list,
.entry-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.content-list {
    display: grid;
    gap: 1rem;
}

.content-list > li:not(.content-panel) {
    padding: 1.4rem;
    border: 1px solid var(--ink-faintest);
    border-radius: var(--radius);
    background: rgba(236, 230, 216, 0.03);
}

.content-list > li > strong:first-child {
    display: block;
    margin-bottom: 0.5rem;
    font-family: var(--serif);
    font-size: 1.35rem;
    font-weight: 600;
}

.content-list > li > ul {
    list-style: none;
    padding: 0;
    display: grid;
    gap: 0.9rem;
}

.archive-list {
    display: grid;
    gap: 1rem;
}

.archive-card {
    display: grid;
    gap: 0.6rem;
}

.content-panel {
    display: grid;
    gap: 1rem;
}

.content-panel + .content-panel {
    margin-top: 1rem;
}

.content-title {
    font-size: 1.35rem;
}

.content-intro {
    margin: 0;
    font-size: 0.98rem;
}

.entry-list {
    display: grid;
    gap: 0.9rem;
}

.details-card {
    overflow: hidden;
}

.hero-note,
.section-lede,
.archive-summary {
    max-width: 42rem;
    color: var(--muted);
}

.feature-panel {
    display: grid;
    gap: 1rem;
    padding: 1.65rem;
    border: 1px solid var(--ink-faintest);
    border-radius: var(--radius);
    background: rgba(236, 230, 216, 0.04);
}

.feature-panel h2,
.feature-panel p {
    margin: 0;
}

.section-eyebrow {
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--accent);
}

.mode-grid {
    display: grid;
    gap: 1rem;
}

.mode-card {
    --tone: var(--accent);
    position: relative;
    display: grid;
    gap: 0.9rem;
    min-height: 100%;
    padding: 1.45rem;
    border: 1px solid var(--ink-faintest);
    border-radius: var(--radius);
    background: rgba(236, 230, 216, 0.04);
    overflow: hidden;
    color: var(--fg);
}

.mode-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0), var(--tone) 20%, rgba(255, 255, 255, 0));
    opacity: 0.8;
}

.mode-card > * {
    position: relative;
    z-index: 1;
}

.mode-card h3 {
    margin: 0;
    font-size: 1.45rem;
    line-height: 1.08;
}

.mode-card p {
    margin: 0;
}

.mode-card .mode-meta {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    width: fit-content;
    padding: 0.38rem 0.72rem;
    border-radius: 999px;
    border: 1px solid var(--tone);
    font-size: 0.73rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    opacity: 0.88;
    color: var(--tone);
}

.mode-card .mode-snippet {
    font-family: var(--serif);
    font-size: 1.02rem;
    line-height: 1.55;
    color: rgba(244, 239, 231, 0.9);
}

.mode-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    margin-top: 0.25rem;
    font-weight: 700;
}

.mode-link::after {
    content: "->";
    font-size: 0.9em;
}

.tone-living {
    --tone: #f0b79d;
    background:
        radial-gradient(circle at 86% 16%, rgba(199, 143, 125, 0.18), transparent 24%),
        linear-gradient(180deg, rgba(199, 143, 125, 0.08), rgba(255, 255, 255, 0.015));
}

.tone-living .mode-link,
.tone-living .archive-link {
    color: #ffd0bd;
}

.tone-voice {
    --tone: #96b9cb;
    background:
        radial-gradient(circle at 82% 18%, rgba(134, 167, 186, 0.18), transparent 25%),
        linear-gradient(180deg, rgba(134, 167, 186, 0.08), rgba(255, 255, 255, 0.015));
}

.tone-voice .mode-link,
.tone-voice .archive-link {
    color: #c9e0eb;
}

.tone-document {
    --tone: #d8b56f;
    background:
        radial-gradient(circle at 85% 18%, rgba(216, 181, 111, 0.18), transparent 24%),
        linear-gradient(180deg, rgba(216, 181, 111, 0.09), rgba(255, 255, 255, 0.015));
}

.tone-document .mode-link,
.tone-document .archive-link {
    color: #efd7a1;
}

.tone-heritage {
    --tone: #e8d791;
    background:
        radial-gradient(circle at 84% 18%, rgba(232, 215, 145, 0.18), transparent 24%),
        linear-gradient(180deg, rgba(232, 215, 145, 0.09), rgba(255, 255, 255, 0.015));
}

.tone-heritage .mode-link,
.tone-heritage .archive-link {
    color: #f5eab9;
}

.archive-group {
    display: grid;
    gap: 1rem;
}

.archive-group + .archive-group {
    margin-top: 0.65rem;
}

.archive-card {
    gap: 0.7rem;
}

.archive-card[class*="tone-"] {
    --tone: var(--accent);
    position: relative;
    overflow: hidden;
}

.archive-card[class*="tone-"]::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 3px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0), var(--tone) 20%, rgba(255, 255, 255, 0));
    opacity: 0.9;
}

.archive-card[class*="tone-"] .archive-meta {
    color: var(--tone);
}

.archive-card p {
    margin: 0;
}

.archive-group-title {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    justify-content: space-between;
    gap: 0.6rem;
}

.archive-group-title h2,
.archive-group-title p {
    margin: 0;
}

.archive-stack {
    display: grid;
    gap: 1rem;
}

details {
    margin: 0;
}

summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.1rem 1.2rem;
    cursor: pointer;
    font-size: 1.08rem;
    font-weight: 600;
    list-style: none;
}

summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: "+";
    flex-shrink: 0;
    width: 1.75rem;
    height: 1.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--accent);
    transition: transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

details[open] summary::after {
    content: "−";
    background: rgba(231, 184, 121, 0.08);
    border-color: var(--border-strong);
}

.details-body {
    padding: 0 1.2rem 1.2rem;
    border-top: 1px solid rgba(215, 195, 160, 0.12);
}

details > :not(summary):not(.details-body) {
    margin-left: 1.2rem;
    margin-right: 1.2rem;
}

details > summary + :not(.details-body) {
    margin-top: 0;
    padding-top: 1rem;
    border-top: 1px solid rgba(215, 195, 160, 0.12);
}

p {
    margin: 0 0 1rem;
}

ul,
ol {
    margin: 0;
    padding-left: 1.2rem;
}

li + li {
    margin-top: 0.45rem;
}

.media-frame,
.pdf-link {
    margin-top: 1rem;
}

.video-wrapper {
    position: relative;
    width: 100%;
    margin-top: 1rem;
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    background: #0a0b0c;
    aspect-ratio: 16 / 9;
}

.video-wrapper iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.audio-wrapper {
    margin-top: 1rem;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: rgba(0, 0, 0, 0.16);
}

audio {
    width: 100%;
}

.prose {
    max-width: var(--reading-width);
}

.prose p,
.prose ol,
.prose ul {
    margin-bottom: 1rem;
}

.prose center {
    display: block;
    margin-bottom: 1rem;
    color: var(--muted);
}

footer {
    padding: 1.5rem 0 0;
    font-size: 0.94rem;
    text-align: center;
}

/* ── Breadcrumb ──────────────────────────────────────── */
.breadcrumb ol {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--muted);
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin: 0;
}

.breadcrumb li + li::before {
    content: "/";
    color: var(--border-strong);
    padding-right: 0.1rem;
}

.breadcrumb a {
    color: var(--muted);
    border-bottom: none;
    transition: color 0.2s ease;
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
    color: var(--accent);
    border-bottom: none;
}

.breadcrumb li[aria-current="page"] {
    color: var(--fg);
}

.page-sibling {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--muted);
    text-decoration: none;
    margin-bottom: 2.5rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.3rem 0.85rem;
    transition: border-color 0.2s, color 0.2s;
}
.page-sibling:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* ── View Switcher — Reflections / For Cooper ───────── */
.view-switcher {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none; /* Firefox */
    max-width: 100%;
    margin-top: 1.75rem;
    border: 1px solid var(--border);
    border-radius: 10px;
}

.view-switcher::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Edge */
}

.view-tab {
    display: block;
    flex: 1;
    padding: 0.5rem 1.2rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    text-align: center;
    color: var(--muted);
    background: transparent;
    border-bottom: none;
    text-decoration: none;
    transition: color 0.2s ease, background 0.2s ease;
    white-space: nowrap;
}

.view-tab + .view-tab {
    border-left: 1px solid var(--border);
}

.view-tab:hover {
    color: var(--fg);
    border-bottom-color: transparent;
    background: rgba(215, 195, 160, 0.07);
}

.view-tab.is-active,
.view-tab.is-active:hover {
    background: var(--accent);
    color: var(--bg);
    border-bottom-color: transparent;
}

@media (min-width: 720px) {
    .intro-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

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

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

@media (min-width: 860px) {
    .nav-container {
        padding-top: 1.1rem;
        padding-bottom: 1.1rem;
    }

    .hamburger {
        display: none;
    }

    #menu {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        gap: 0.6rem;
        max-height: none;
        overflow: visible;
        padding: 0 1.25rem 1rem;
    }

    .nav-link {
        padding: 0.75rem 1rem;
    }
}

@media (max-width: 719px) {
    .container {
        padding-top: 4rem;
    }

    .hero {
        padding: 1.5rem;
    }

    h1 {
        max-width: 100%;
    }

    .section-card,
    .archive-card,
    .content-panel,
    .feature-panel {
        padding: 1.2rem;
    }
}