:root {
    --bg: #f8fafc;
    --bg-elev: #ffffff;
    --ink: #0f172a;
    --muted: #64748b;
    --line: #e2e8f0;
    --pine: #2563eb;
    --pine-strong: #1d4ed8;
    --copper: #2563eb;
    --copper-soft: #eff6ff;
    --ok: #146338;
    --danger: #8d2424;
    --shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
    --radius: 16px;
    --font: "Segoe UI", system-ui, -apple-system, sans-serif;
    --serif: "Segoe UI", system-ui, -apple-system, sans-serif;
    --mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
    --header-h: 64px;
    --bs-body-font-family: var(--font);
    --bs-body-color: var(--ink);
    --bs-body-bg: var(--bg);
    --bs-primary: var(--pine);
    --bs-link-color: var(--copper);
    --bs-border-color: var(--line);
}

html[data-theme="dark"] {
    --bg: #0b1220;
    --bg-elev: #111827;
    --ink: #e5eefb;
    --muted: #94a3b8;
    --line: #243044;
    --pine: #60a5fa;
    --pine-strong: #93c5fd;
    --copper: #60a5fa;
    --copper-soft: #172554;
    --ok: #8ed0a8;
    --danger: #f0a0a0;
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font);
    line-height: 1.6;
}
img { max-width: 100%; height: auto; }
a { color: var(--copper); }
a:hover { color: var(--pine-strong); }
h1, h2, h3 { font-family: var(--font); line-height: 1.25; letter-spacing: -0.02em; font-weight: 800; }
:focus-visible { outline: 3px solid var(--copper); outline-offset: 2px; }
.skip-link {
    position: absolute; left: 1rem; top: -4rem; background: var(--pine); color: #fff; padding: 0.5rem 0.8rem; z-index: 20;
}
.skip-link:focus { top: 0.5rem; color: #fff; }
.container { width: min(1120px, calc(100% - 2rem)); margin-inline: auto; }
.eyebrow {
    margin: 0 0 0.35rem;
    font-family: var(--font);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--pine);
}
.eyebrow a { color: inherit; text-decoration: none; }
.meta { margin: 0 0 0.35rem; color: var(--muted); font-size: 0.82rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: color-mix(in srgb, var(--bg-elev) 92%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.header-bar {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas: "brand nav tools";
    gap: 1rem 1.5rem;
    align-items: center;
    min-height: var(--header-h);
}
.header-bar-minimal {
    grid-template-columns: 1fr auto;
    grid-template-areas: "brand tools";
}
.header-bar-minimal .site-nav { display: none; }
.brand { grid-area: brand; }
.site-nav { grid-area: nav; }
.header-tools { grid-area: tools; }
.brand { display: inline-flex; gap: 0.65rem; align-items: center; color: var(--ink); text-decoration: none; font-weight: 800; font-size: 1.15rem; }
.brand img { border-radius: 10px; }
.site-nav { min-width: 0; }
.nav-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.1rem; align-items: center; }
.nav-links > a, .nav-panel > summary {
    color: var(--ink);
    text-decoration: none;
    font-weight: 650;
    padding: 0.35rem 0.55rem;
    border-radius: 999px;
    white-space: nowrap;
    cursor: pointer;
    list-style: none;
}
.nav-links > a:hover, .nav-panel > summary:hover { background: color-mix(in srgb, var(--pine) 10%, transparent); }
.nav-panel { position: relative; }
.nav-panel > summary::-webkit-details-marker { display: none; }
.nav-panel-list {
    position: absolute;
    top: calc(100% + 0.35rem);
    right: 0;
    min-width: 220px;
    display: grid;
    gap: 0.15rem;
    padding: 0.55rem;
    background: var(--bg-elev);
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: var(--shadow);
    z-index: 12;
}
.nav-panel-list a {
    color: var(--ink);
    text-decoration: none;
    font-weight: 650;
    padding: 0.45rem 0.6rem;
    border-radius: 10px;
}
.nav-panel-list a:hover { background: color-mix(in srgb, var(--pine) 10%, transparent); }
.header-tools { display: flex; align-items: center; gap: 0.25rem; }
.header-search {
    display: flex;
    width: min(280px, 34vw);
    background: var(--bg-elev);
    border: 1px solid var(--line);
    border-radius: 999px;
    overflow: hidden;
}
.header-search input, .nav-search input { border: 0; background: transparent; color: var(--ink); padding: 0.55rem 0.9rem; }
.header-search input { width: 100%; }
.header-search button, .icon-button {
    border: 0;
    background: transparent;
    color: var(--ink);
    min-width: 44px;
    min-height: 44px;
    display: inline-grid;
    place-items: center;
    border-radius: 12px;
    cursor: pointer;
    text-decoration: none;
}
.icon-button:hover { background: color-mix(in srgb, var(--pine) 8%, transparent); color: var(--pine); }
.menu-toggle, .nav-search { display: none; }
.nav-search { gap: 0.4rem; width: 100%; }
.nav-search input { flex: 1; border: 1px solid var(--line); border-radius: 999px; background: var(--bg-elev); }

.hero { padding: 2.4rem 0 0.5rem; }
.hero-center {
    padding: 3.2rem 0 1.4rem;
    text-align: center;
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(240px, 0.8fr); gap: 1.5rem; align-items: stretch; }
.hero h1 { font-size: clamp(2.3rem, 5vw, 3.6rem); max-width: 16ch; margin: 0 0 0.7rem; }
.hero-center h1 {
    max-width: none;
    width: 100%;
    margin: 0 auto 0.65rem;
    text-align: center;
    font-size: clamp(2rem, 4.8vw, 3.1rem);
}
.hero-center .lede {
    max-width: 40ch;
    margin: 0 auto;
    font-size: 1.05rem;
}
.lede { font-size: 1.12rem; max-width: 62ch; color: var(--muted); margin-top: 0; }
.hero-search { display: flex; gap: 0.5rem; max-width: 640px; margin-top: 1.25rem; }
.hero-search-pill {
    position: relative;
    align-items: center;
    max-width: 560px;
    margin: 1.6rem auto 0;
    background: var(--bg-elev);
    border: 1px solid var(--line);
    border-radius: 999px;
    box-shadow: var(--shadow);
    padding: 0.15rem 0.15rem 0.15rem 1rem;
}
.hero-search-pill > i { color: var(--muted); flex: 0 0 auto; }
.hero-search-pill input {
    border: 0 !important;
    background: transparent !important;
    box-shadow: none;
    padding: 0.9rem 1rem;
}
.hero-search input, .tool-input, .tool-output, .form-control, textarea, select {
    width: 100%; border: 1px solid var(--line); background: var(--bg-elev); color: var(--ink); border-radius: 12px; padding: 0.75rem 0.9rem;
}
textarea.tool-input, textarea.tool-output { min-height: 220px; font-family: var(--mono); font-size: 0.92rem; }
.hero-panel, .form-panel {
    background: var(--bg-elev);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.15rem 1.25rem;
}
.hero-panel h2 { margin: 0 0 0.8rem; font-size: 1.25rem; }
.fact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; }
.fact-list li { display: grid; gap: 0.1rem; padding-top: 0.7rem; border-top: 1px solid var(--line); }
.fact-list li:first-child { padding-top: 0; border-top: 0; }
.fact-list strong { font-size: 1.15rem; }
.fact-list span { color: var(--muted); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem; border-radius: 999px; padding: 0.65rem 1rem; min-height: 44px; border: 1px solid transparent; text-decoration: none; font-weight: 700; cursor: pointer; }
.btn-primary { background: var(--pine); color: #fff; }
html[data-theme="dark"] .btn-primary { color: #10211c; }
.btn-outline { background: var(--bg-elev); border-color: var(--line); color: var(--ink); }

.section { padding: 1.6rem 0 0.4rem; }
.section-tight { padding-top: 0.6rem; }
.home-category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}
.home-category-card {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1.25rem 1.3rem;
    background: var(--bg-elev);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.home-category-card:hover {
    border-color: color-mix(in srgb, var(--pine) 35%, var(--line));
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.08);
    color: inherit;
}
.home-category-icon {
    width: 48px;
    height: 48px;
    flex: 0 0 auto;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: var(--copper-soft);
    color: var(--pine);
    font-size: 1.25rem;
}
.home-category-copy { display: grid; gap: 0.2rem; min-width: 0; }
.home-category-copy strong { font-size: 1.15rem; font-weight: 800; }
.home-category-copy span { color: var(--muted); font-size: 0.95rem; }
.home-more-cats {
    margin: 1rem 0 0;
    text-align: center;
    color: var(--muted);
    font-size: 0.95rem;
}
.ad-reserve {
    margin: 0.4rem 0 0.2rem;
    min-height: 140px;
    border: 1px dashed var(--line);
    border-radius: 14px;
    background: color-mix(in srgb, var(--bg-elev) 70%, var(--bg));
    padding: 1.1rem 1.2rem 1.4rem;
    text-align: center;
    color: var(--muted);
}
.ad-reserve .ad-label {
    margin-bottom: 0.55rem;
    letter-spacing: 0.08em;
}
.ad-reserve p:last-child { margin: 0; font-size: 0.95rem; }
.page { padding-bottom: 2.8rem; }
.page-head { padding: 0.3rem 0 1.15rem; margin-bottom: 1.3rem; border-bottom: 1px solid var(--line); }
.page-head h1 { margin: 0.15rem 0 0.45rem; font-size: clamp(2rem, 4vw, 3rem); }
.page-head .lede { margin-bottom: 0; }
.section-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 1rem;
    margin: 0 0 1rem;
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--line);
}
.section-head h2, .section-head h3 { margin: 0; }
.section-link { font-weight: 700; text-decoration: none; white-space: nowrap; }
.catalog-group { margin-top: 1.6rem; }
.related-band { margin-top: 2rem; }

.card-grid, .tool-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.tool-card, .info-card, .tool-panel, .prose, .admin-card {
    background: var(--bg-elev);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.tool-card { position: relative; display: flex; }
.tool-card a { display: flex; flex-direction: column; gap: 0.15rem; flex: 1; padding: 1.1rem 3rem 1.05rem 1.1rem; color: inherit; text-decoration: none; }
.tool-card h3, .info-card h2, .info-card h3 { margin: 0.15rem 0 0.35rem; font-size: 1.25rem; }
.tool-card p, .info-card p { color: var(--muted); }
.tool-card .meta { margin-bottom: 0; }
.tool-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 12px; background: var(--copper-soft); color: var(--copper); margin-bottom: 0.7rem; }
.fav-button { position: absolute; top: 0.45rem; right: 0.45rem; border: 0; background: transparent; color: var(--muted); min-width: 44px; min-height: 44px; }
.fav-button[aria-pressed="true"] { color: var(--copper); }
.info-card { padding: 1.15rem 1.2rem 1.2rem; display: flex; flex-direction: column; }
.info-card p:last-child { margin-bottom: 0; }
.category-card h3 { margin-top: 0.2rem; }

.tool-layout, .page { display: block; }
.tool-panel { padding: 0; overflow: hidden; margin-bottom: 1.4rem; }
.tool-toolbar {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    flex-wrap: wrap;
    align-items: center;
    margin: 0;
    padding: 0.8rem 1rem;
    background: color-mix(in srgb, var(--bg) 55%, var(--bg-elev));
    border-bottom: 1px solid var(--line);
}
.tool-actions, .tool-utilities, .preset-row { display: flex; flex-wrap: wrap; gap: 0.45rem; align-items: center; }
.tool-body { padding: 1rem; display: grid; gap: 0.85rem; }
.tool-body > p, .tool-body .split > p { margin: 0; }
.tool-status { min-height: 1.5rem; margin: 0; font-weight: 700; }
.tool-status.is-error { color: var(--danger); }
.tool-status.is-ok { color: var(--ok); }
fieldset { border: 1px solid var(--line); border-radius: 12px; margin: 0; padding: 0.75rem 1rem; }
fieldset label { margin-right: 0.85rem; }

.doc-layout { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 1.25rem; align-items: start; }
.doc-nav {
    position: sticky;
    top: calc(var(--header-h) + 12px);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 0.2rem 0 0.2rem 0.15rem;
}
.doc-nav a { color: var(--ink); text-decoration: none; font-weight: 650; font-size: 0.92rem; }
.doc-nav a:hover { color: var(--pine); }
.prose { padding: 0.3rem 1.25rem 1.2rem; }
.page > .prose, .page > .form-panel { max-width: 760px; }
.prose h2, .prose h3 { margin-top: 0.2rem; }
.prose h2 { font-size: 1.45rem; }
.doc-block { scroll-margin-top: calc(var(--header-h) + 16px); padding: 1.15rem 0 0.2rem; }
.doc-block + .doc-block { border-top: 1px solid var(--line); margin-top: 0.4rem; }
.prose > h2 { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.prose pre { overflow: auto; background: var(--bg); padding: 0.8rem; border-radius: 12px; }
.example-grid { display: grid; gap: 1rem; }
.error-list { margin: 0; padding-left: 1.1rem; }
.error-list li { margin: 0.45rem 0; }
.split, .field-grid { display: grid; gap: 0.8rem; }
.field-grid { grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); }

.site-footer { border-top: 1px solid var(--line); margin-top: 2.5rem; background: color-mix(in srgb, var(--bg-elev) 70%, var(--bg)); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 1.5rem; padding-top: 2rem; }
.footer-grid h2 { font-size: 0.78rem; font-family: var(--font); letter-spacing: 0.08em; text-transform: uppercase; margin-top: 0; }
.footer-grid p { color: var(--muted); }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin: 0.3rem 0; }
.footer-grid a { color: var(--ink); text-decoration: none; font-weight: 650; }
.footer-note { color: var(--muted); font-size: 0.92rem; border-top: 1px solid var(--line); margin-top: 1.2rem; padding: 0.9rem 0 1rem; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0 0 0.7rem; margin: 0; color: var(--muted); font-size: 0.92rem; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 0.4rem; }
.banner { padding: 0.8rem 1rem; border-radius: 12px; margin: 0 0 1rem; background: var(--bg-elev); border: 1px solid var(--line); }
.banner-ok { background: color-mix(in srgb, var(--ok) 15%, var(--bg-elev)); }
.banner-error { background: color-mix(in srgb, var(--danger) 12%, var(--bg-elev)); }
.consent { position: sticky; bottom: 0; z-index: 15; padding: 0.75rem; }
.consent-card { width: min(860px, 100%); margin: 0 auto; background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem; box-shadow: var(--shadow); }
.consent-actions, .admin-top { display: flex; gap: 0.75rem; align-items: center; flex-wrap: wrap; }
.ad-slot { margin: 0 0 1rem; min-height: 120px; border: 1px dashed var(--line); border-radius: 12px; padding: 0.5rem; text-align: center; }
.ad-label { font-size: 0.75rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); margin: 0 0 0.4rem; }
.ad-frame { min-height: 90px; }
.diff-table { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 0.9rem; }
.diff-table td { padding: 0.2rem 0.4rem; vertical-align: top; }
.diff-delete { background: color-mix(in srgb, var(--danger) 16%, transparent); }
.diff-insert { background: color-mix(in srgb, var(--ok) 16%, transparent); }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 0.7rem; }
.stat { background: var(--bg); border-radius: 12px; padding: 0.7rem; }
.stat strong { display: block; font-size: 1.3rem; }
.device-band { background: var(--bg-elev); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.local-lists { display: grid; grid-template-columns: 1fr 1fr; }
.local-lists > div { padding: 1.1rem 1.2rem 1.2rem; }
.local-lists > div + div { border-left: 1px solid var(--line); }
.local-lists h3 { margin: 0 0 0.6rem; font-size: 1.15rem; }
.local-lists ul { list-style: none; padding: 0; margin: 0; }
.local-lists li { padding: 0.4rem 0; border-bottom: 1px solid var(--line); }
.local-lists li:last-child { border-bottom: 0; }
.form-panel { display: grid; gap: 0.8rem; }
.form-panel p { margin: 0; }
.admin-shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.admin-side { background: var(--bg-elev); border-right: 1px solid var(--line); padding: 1rem; }
.admin-side a { display: block; color: var(--ink); text-decoration: none; padding: 0.45rem 0; font-weight: 650; }
.admin-main { padding: 1.2rem; }
.admin-card { padding: 1rem; margin-bottom: 1rem; }
.table-wrap { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; }
table.data th, table.data td { text-align: left; padding: 0.55rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.honeypot { position: absolute; left: -9999px; }
.file-list { display: grid; gap: 0.45rem; }
.file-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    align-items: center;
    justify-content: space-between;
    padding: 0.65rem 0.8rem;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--bg);
}
.file-row .btn { min-height: 36px; padding: 0.35rem 0.75rem; }
.image-preview {
    display: grid;
    place-items: center;
    min-height: 0;
    padding: 0.4rem 0;
}
.image-preview:empty { display: none; }
.image-preview canvas {
    max-width: 100%;
    height: auto;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--bg);
}

@media (min-width: 720px) {
    .card-grid, .tool-grid, .example-grid, .home-category-grid { grid-template-columns: 1fr 1fr; }
    .split { grid-template-columns: 1fr 1fr; }
    .home-category-card:last-child:nth-child(odd) {
        grid-column: 1 / -1;
        max-width: calc(50% - 0.5rem);
        justify-self: center;
        width: 100%;
    }
}
@media (min-width: 1040px) {
    .tool-grid { grid-template-columns: 1fr 1fr 1fr; }
    .card-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
    .hero-grid, .doc-layout, .footer-grid { grid-template-columns: 1fr; }
    .doc-nav { position: static; flex-direction: row; flex-wrap: wrap; gap: 0.45rem 0.9rem; padding-bottom: 0.7rem; border-bottom: 1px solid var(--line); }
}
@media (max-width: 800px) {
    .header-bar,
    .header-bar-minimal {
        grid-template-columns: 1fr auto;
        grid-template-areas: "brand tools";
    }
    .menu-toggle { display: inline-grid; place-items: center; }
    .header-search { display: none; }
    .site-nav,
    .header-bar-minimal .site-nav { display: none; grid-area: auto; grid-column: 1 / -1; grid-row: 2; padding-bottom: 0.9rem; }
    .site-nav.is-open,
    .header-bar-minimal .site-nav.is-open { display: grid; gap: 0.7rem; }
    .nav-search { display: flex; }
    .nav-links { flex-direction: column; align-items: stretch; }
    .nav-links > a, .nav-panel > summary { padding: 0.55rem 0.2rem; border-radius: 0; border-bottom: 1px solid var(--line); }
    .nav-panel-list { position: static; box-shadow: none; border: 0; padding: 0.2rem 0 0.6rem 0.7rem; min-width: 0; }
    .local-lists { grid-template-columns: 1fr; }
    .local-lists > div + div { border-left: 0; border-top: 1px solid var(--line); }
    .admin-shell { display: block; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-center { padding: 2.2rem 0 1rem; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; animation: none !important; }
}