:root {
    --sans:
        "Inter Tight", -apple-system, BlinkMacSystemFont,
        "Segoe UI", Helvetica, Arial, sans-serif;
    --serif:
        "Inter Tight", -apple-system, BlinkMacSystemFont,
        "Segoe UI", Helvetica, Arial, sans-serif;
    --mono:
        "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo,
        Consolas, monospace;
}

/* Palette: Cobalt (default) — kiln glaze blue */
html[data-theme="cobalt"] {
    --ink: #11161d;
    --ink-soft: #2a3140;
    --paper: #f3f4f7;
    --paper-2: #e8eaf0;
    --border: #cdd1dc;
    --border-soft: #dfe2eb;
    --muted: #5e6577;
    --rust: #2c5cad; /* accent */
    --rust-deep: #1d4080;
}
/* Palette: Forge — hot-metal yellow on dark slate */
html[data-theme="forge"] {
    --ink: #f3ede0;
    --ink-soft: #cfc8b8;
    --paper: #161513;
    --paper-2: #1f1d1a;
    --border: #2e2b25;
    --border-soft: #25231f;
    --muted: #8a8478;
    --rust: #d8b34a;
    --rust-deep: #f0cf6a;
}
/* Palette: Slate — quiet neutral, no warm bias */
html[data-theme="slate"] {
    --ink: #181a1c;
    --ink-soft: #353a3f;
    --paper: #f4f5f5;
    --paper-2: #e9eaea;
    --border: #d2d4d4;
    --border-soft: #e0e1e1;
    --muted: #65696e;
    --rust: #2f6b56; /* deep teal accent */
    --rust-deep: #1e4a3b;
}
/* Palette: Mulberry — purple-leaning, warm but not orange */
html[data-theme="mulberry"] {
    --ink: #1b1419;
    --ink-soft: #3a2e36;
    --paper: #f5f1f3;
    --paper-2: #ece6ea;
    --border: #d8cfd5;
    --border-soft: #e3dde0;
    --muted: #6c5e66;
    --rust: #84305f;
    --rust-deep: #5e1f43;
}
/* Palette: Graphite — black + white + a tiny brick accent */
html[data-theme="graphite"] {
    --ink: #0f0f0f;
    --ink-soft: #2a2a2a;
    --paper: #fbfbfa;
    --paper-2: #efefee;
    --border: #d4d4d2;
    --border-soft: #e2e2e0;
    --muted: #6a6a68;
    --rust: #8d2a1e;
    --rust-deep: #5e1a12;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}
html,
body {
    margin: 0;
    padding: 0;
}
body {
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
a {
    color: var(--rust-deep);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
}
a:hover {
    color: var(--rust);
}
code {
    font-family: var(--mono);
    font-size: 0.88em;
    background: var(--paper-2);
    padding: 1px 5px;
}

.wrap {
    max-width: 920px;
    margin: 0 auto;
    padding: 0 28px;
}

/* ── UTILITIES ── */
.section {
    padding: 56px 0;
    border-bottom: 1px solid var(--border);
}
.section--hero {
    padding: 72px 0 56px;
    position: relative;
    overflow: hidden;
}
.section--alt {
    background: var(--paper-2);
}
.section--tight {
    padding: 36px 0;
}

.type-eyebrow {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.type-eyebrow b {
    color: var(--rust);
    font-weight: 500;
}

.type-h1 {
    font-family: var(--serif);
    font-weight: 600;
    font-size: clamp(34px, 5.2vw, 52px);
    line-height: 1.08;
    letter-spacing: -0.018em;
    margin: 14px 0 18px;
    max-width: 18ch;
    text-wrap: balance;
}
.type-h1 em {
    font-style: normal;
    font-weight: 600;
    color: var(--rust);
}

.type-h2 {
    font-family: var(--serif);
    font-weight: 600;
    font-size: 24px;
    margin: 0 0 10px;
    letter-spacing: -0.01em;
}

.type-lede {
    font-size: 18px;
    color: var(--ink-soft);
    max-width: 58ch;
    margin: 0 0 26px;
    text-wrap: pretty;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}
@media (max-width: 700px) {
    .grid-2 {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}

/* ── STAMP ── */
.stamp-alpha {
    position: absolute;
    top: 60px;
    left: 50%;
    transform: translateX(-50%) rotate(12deg);
    font-family: var(--sans);
    font-weight: 900;
    font-size: clamp(60px, 12vw, 140px);
    color: #d93025;
    opacity: 0.15;
    pointer-events: none;
    user-select: none;
    z-index: 0;
    letter-spacing: 0.05em;
    white-space: nowrap;
    padding: 0.2em 0.5em;
    border: 0.15em double #d93025;
    text-transform: uppercase;
    border-radius: 4px;
}

/* ── TABLES ── */
.table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    background: var(--paper);
    margin: 16px 0;
}
table.data {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--mono);
    font-size: 13px;
    text-align: left;
}
table.data th {
    background: var(--paper-2);
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 11px;
}
table.data td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-soft);
    color: var(--ink-soft);
}
table.data tr:last-child td {
    border-bottom: none;
}
table.data .bold {
    color: var(--ink);
    font-weight: 600;
}
table.data .accent {
    color: var(--rust);
}

/* ── NAV ── */
header.site {
    border-bottom: 1px solid var(--border);
    background: var(--paper);
}
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--serif);
    font-weight: 600;
    font-size: 19px;
    color: var(--ink);
    text-decoration: none;
    letter-spacing: -0.005em;
}
.brand .mark {
    width: 18px;
    height: 16px;
    flex: none;
    color: var(--rust);
}
.brand .mark svg {
    display: block;
    width: 100%;
    height: 100%;
    fill: currentColor;
}
.nav ul {
    list-style: none;
    display: flex;
    gap: 24px;
    margin: 0;
    padding: 0;
    font-family: var(--mono);
    font-size: 13px;
}
.nav ul a {
    color: var(--ink-soft);
    text-decoration: none;
}
.nav ul a:hover {
    color: var(--rust);
}
@media (max-width: 560px) {
    .nav ul li.hide-sm {
        display: none;
    }
}

/* ── HERO ── */
.hero-cta {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    font-family: var(--mono);
    font-size: 13px;
}
.hero-cta a {
    color: var(--ink);
    text-decoration: none;
    border-bottom: 1px solid var(--ink);
    padding-bottom: 2px;
}
.hero-cta a:hover {
    color: var(--rust);
    border-color: var(--rust);
}
.hero-cta a.muted {
    color: var(--muted);
    border-color: var(--border);
}
.hero-cta a.muted:hover {
    color: var(--ink);
    border-color: var(--ink);
}

/* ── FEATURES ── */
.feat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 40px;
}
@media (max-width: 640px) {
    .feat-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}
.feat h3 {
    font-family: var(--serif);
    font-weight: 600;
    font-size: 17.5px;
    margin: 0 0 6px;
    letter-spacing: -0.005em;
}
.feat h3 .num {
    font-family: var(--mono);
    font-size: 11.5px;
    color: var(--rust);
    margin-right: 10px;
    font-weight: 500;
    letter-spacing: 0.04em;
    vertical-align: 2px;
}
.feat p {
    font-size: 15.5px;
    color: var(--ink-soft);
    margin: 0;
    max-width: 44ch;
    text-wrap: pretty;
}

/* ── CODE PANEL ── */
.grid-asymmetric {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
}
@media (max-width: 760px) {
    .grid-asymmetric {
        grid-template-columns: 1fr;
    }
}

.links-list {
    font-family: var(--mono);
    font-size: 12.5px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

pre.term {
    background: #1a1714;
    color: #e8e0cf;
    font-family: var(--mono);
    font-size: 13px;
    line-height: 1.6;
    margin: 0;
    padding: 16px 18px;
    overflow-x: auto;
    border: 1px solid #1a1714;
}
pre.term .c {
    color: #6e6757;
}
pre.term .k {
    color: #d8a55b;
}
pre.term .g {
    color: #93b079;
}
pre.term .p {
    color: #c97f4e;
}
pre.term .m {
    color: #807a6c;
}
pre.term .b {
    color: #6fa8d6;
    font-weight: 600;
}
pre.term .r {
    color: #e06c5d;
    font-weight: 600;
}
pre.term .div {
    display: block;
    border-top: 1px dashed #2e2a24;
    margin: 10px 0;
}

/* ── STRIP ── */
.strip {
    padding: 36px 0;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    gap: 28px;
    flex-wrap: wrap;
    align-items: baseline;
    font-family: var(--mono);
    font-size: 12.5px;
    color: var(--muted);
}
.strip .pills span {
    display: inline-block;
    margin-right: 4px;
    color: var(--ink-soft);
}
.strip .pills span::after {
    content: "·";
    color: var(--border);
    margin-left: 6px;
}
.strip .pills span:last-child::after {
    content: "";
}

footer.foot {
    padding: 28px 0 48px;
    font-family: var(--mono);
    font-size: 12px;
    color: var(--muted);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}
footer.foot a {
    color: var(--muted);
    text-decoration: none;
}
footer.foot a:hover {
    color: var(--rust);
}

/* ── THEME SWITCHER ── */
.theme-switch {
    position: fixed;
    bottom: 18px;
    right: 18px;
    background: var(--paper);
    border: 1px solid var(--border);
    padding: 8px 10px;
    display: flex;
    gap: 6px;
    align-items: center;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--muted);
    z-index: 30;
    box-shadow: 0 4px 16px -8px rgba(0, 0, 0, 0.15);
}
.theme-switch span.lbl {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-right: 4px;
}
.theme-switch button {
    width: 18px;
    height: 18px;
    border: 1px solid var(--border);
    background: var(--swatch, #888);
    cursor: pointer;
    padding: 0;
    position: relative;
    transition: transform 0.12s ease;
}
.theme-switch button:hover {
    transform: scale(1.1);
}
.theme-switch button[aria-pressed="true"]::after {
    content: "";
    position: absolute;
    inset: -3px;
    border: 1px solid var(--ink);
}
.theme-switch button[data-t="cobalt"] {
    --swatch: #2c5cad;
}
.theme-switch button[data-t="forge"] {
    --swatch: #d8b34a;
}
.theme-switch button[data-t="slate"] {
    --swatch: #2f6b56;
}
.theme-switch button[data-t="mulberry"] {
    --swatch: #84305f;
}
.theme-switch button[data-t="graphite"] {
    --swatch: #8d2a1e;
}

/* ── STATUS ── */
.status-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}
@media (max-width: 700px) {
    .status-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}
.status-list-header {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
    margin: 0 0 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}
.status-list {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 15px;
}
.status-list li {
    padding: 7px 0 7px 18px;
    position: relative;
    color: var(--ink-soft);
    border-bottom: 1px dotted var(--border-soft);
    line-height: 1.5;
}
.status-list li:last-child {
    border-bottom: none;
}
.status-list li::before {
    content: "+";
    position: absolute;
    left: 0;
    top: 7px;
    font-family: var(--mono);
    color: var(--rust);
    font-size: 13px;
}
.status-list.todo li::before {
    content: "·";
    color: var(--muted);
}
.status-list li b {
    color: var(--ink);
    font-weight: 600;
}