:root {
    --ink-950: #08172d;
    --ink-900: #0b1f3a;
    --ink-700: #1f3b5c;
    --ink-600: #31546f;
    --ink-500: #4b647a;
    --ink-400: #6f8495;
    --blue-800: #1748ad;
    --blue-700: #1e5ad7;
    --blue-600: #2b6fff;
    --blue-100: #e6f1ff;
    --blue-50: #f5faff;
    --green-800: #087443;
    --green-100: #e9f9f0;
    --amber-800: #975a00;
    --amber-100: #fff5dc;
    --border: #d7e6fb;
    --surface: #ffffff;
    --surface-subtle: #f7fbff;
    --shadow: 0 18px 40px rgba(14, 34, 69, 0.12);
    --radius-lg: 18px;
    --radius-md: 14px;
    --radius-sm: 10px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-width: 320px;
    color: var(--ink-900);
    background:
        radial-gradient(1000px 560px at -10% -18%, #d9ecff 0%, transparent 62%),
        radial-gradient(820px 620px at 110% -10%, #e6f2ff 0%, transparent 58%),
        linear-gradient(180deg, #f6fbff 0%, #ffffff 76%);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.65;
}

body::before {
    content: "";
    position: fixed;
    z-index: -1;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(to right, rgba(30, 90, 215, 0.045) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(30, 90, 215, 0.045) 1px, transparent 1px);
    background-size: 48px 48px;
}

a {
    color: var(--blue-800);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 3px solid #ffbf47;
    outline-offset: 3px;
}

code {
    padding: 0.12em 0.34em;
    border: 1px solid #cfe0f5;
    border-radius: 5px;
    color: var(--ink-700);
    background: #f2f7fd;
    font: 0.9em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    overflow-wrap: anywhere;
}

.skip-link {
    position: absolute;
    z-index: 10;
    top: 8px;
    left: 8px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    color: #ffffff;
    background: var(--ink-950);
    transform: translateY(-150%);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    position: relative;
    z-index: 2;
    border-bottom: 1px solid rgba(215, 230, 251, 0.85);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
}

.site-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    max-width: 1180px;
    margin: 0 auto;
    padding: 14px 24px;
}

.brand {
    display: inline-flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 10px;
    color: var(--ink-900);
    font-size: 1.1rem;
    font-weight: 750;
    letter-spacing: 0.02em;
    text-decoration: none;
}

.brand-mark {
    width: 14px;
    height: 14px;
    border-radius: 5px;
    background: linear-gradient(135deg, var(--blue-600), #72a9ff);
    box-shadow: 0 6px 12px rgba(43, 111, 255, 0.35);
}

.nav-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 4px;
    flex-wrap: wrap;
}

.nav-links a {
    padding: 6px 9px;
    border-radius: 7px;
    color: var(--ink-600);
    font-size: 0.85rem;
    text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--blue-800);
    background: var(--blue-100);
}

.page-shell {
    width: min(1120px, calc(100% - 48px));
    margin: 0 auto;
    padding: 40px 0 64px;
}

.hero {
    display: grid;
    gap: 14px;
    margin-bottom: 28px;
    padding: 38px 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.97), rgba(242, 248, 255, 0.97));
    box-shadow: var(--shadow);
}

.eyebrow,
.section-kicker {
    color: var(--blue-700);
    font-size: 0.76rem;
    font-weight: 750;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1 {
    max-width: 760px;
    margin: 0;
    color: var(--ink-950);
    font-size: clamp(2rem, 4.2vw, 3.4rem);
    letter-spacing: -0.035em;
    line-height: 1.1;
}

.hero-lede {
    max-width: 760px;
    margin: 0;
    color: var(--ink-600);
    font-size: clamp(1rem, 1.8vw, 1.16rem);
}

.hero-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 4px;
}

.hero-badges span {
    padding: 5px 11px;
    border: 1px solid #c6dcfa;
    border-radius: 999px;
    color: var(--blue-800);
    background: var(--blue-100);
    font-size: 0.82rem;
    font-weight: 700;
}

.content-layout {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
    gap: 26px;
}

.toc {
    position: sticky;
    top: 20px;
    display: grid;
    gap: 4px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.86);
}

.toc-title {
    margin: 0 0 7px;
    color: var(--ink-900);
    font-size: 0.82rem;
    font-weight: 750;
}

.toc a {
    padding: 5px 7px;
    border-radius: 6px;
    color: var(--ink-600);
    font-size: 0.83rem;
    line-height: 1.4;
    text-decoration: none;
}

.toc a:hover {
    color: var(--blue-800);
    background: var(--blue-50);
}

.content-column {
    display: grid;
    gap: 18px;
    min-width: 0;
}

.notice,
.card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    box-shadow: 0 10px 26px rgba(15, 36, 72, 0.07);
}

.notice {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 22px 24px;
}

.notice-icon {
    display: grid;
    flex: 0 0 auto;
    width: 30px;
    height: 30px;
    place-items: center;
    border-radius: 50%;
    color: var(--green-800);
    background: var(--green-100);
    font-weight: 800;
}

.notice h2,
.card h2 {
    margin: 0;
    color: var(--ink-950);
    font-size: clamp(1.18rem, 2vw, 1.45rem);
    line-height: 1.3;
}

.notice p,
.card > p {
    margin: 8px 0 0;
    color: var(--ink-600);
}

.card {
    scroll-margin-top: 20px;
    padding: 28px;
}

.card h2 {
    margin-top: 5px;
}

.muted {
    color: var(--ink-500) !important;
    font-size: 0.9rem;
}

.fact-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-top: 20px;
}

.fact {
    display: grid;
    align-content: start;
    gap: 7px;
    padding: 15px;
    border: 1px solid #e1ecf9;
    border-radius: var(--radius-md);
    background: var(--surface-subtle);
}

.fact-label {
    color: var(--blue-700);
    font-size: 0.76rem;
    font-weight: 750;
    letter-spacing: 0.06em;
}

.fact strong {
    color: var(--ink-900);
    font-size: 0.94rem;
    line-height: 1.4;
}

.fact p,
.storage-row p {
    margin: 0;
    color: var(--ink-500);
    font-size: 0.86rem;
    line-height: 1.5;
}

.table-wrap {
    margin-top: 20px;
    overflow-x: auto;
    border: 1px solid #dce9f8;
    border-radius: var(--radius-md);
}

table {
    width: 100%;
    min-width: 650px;
    border-collapse: collapse;
    background: var(--surface);
    font-size: 0.9rem;
}

caption {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

th,
td {
    padding: 13px 14px;
    border-bottom: 1px solid #e4edf7;
    text-align: left;
    vertical-align: top;
}

thead th {
    color: var(--ink-700);
    background: var(--surface-subtle);
    font-size: 0.8rem;
}

tbody tr:last-child th,
tbody tr:last-child td {
    border-bottom: 0;
}

tbody th {
    width: 21%;
    color: var(--ink-900);
    font-weight: 700;
}

td {
    color: var(--ink-600);
}

.status-no,
.status-unknown {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 750;
    white-space: nowrap;
}

.status-no {
    color: var(--green-800);
    background: var(--green-100);
}

.status-unknown {
    color: var(--amber-800);
    background: var(--amber-100);
}

.callout {
    margin: 18px 0 0 !important;
    padding: 14px 16px;
    border-left: 4px solid #f3b64b;
    color: var(--ink-700) !important;
    background: #fffaf0;
    font-size: 0.89rem;
}

.storage-list {
    display: grid;
    gap: 1px;
    margin-top: 20px;
    overflow: hidden;
    border: 1px solid #e1ecf9;
    border-radius: var(--radius-md);
}

.storage-row {
    display: grid;
    grid-template-columns: 100px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
    padding: 15px;
    background: var(--surface-subtle);
}

.storage-row + .storage-row {
    border-top: 1px solid #e1ecf9;
}

.storage-row strong {
    display: block;
    margin-bottom: 3px;
    color: var(--ink-900);
    font-size: 0.94rem;
}

.storage-state {
    display: inline-flex;
    justify-content: center;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 750;
    white-space: nowrap;
}

.state-off {
    color: var(--green-800);
    background: var(--green-100);
}

.state-memory {
    color: var(--blue-800);
    background: var(--blue-100);
}

.state-browser {
    color: var(--amber-800);
    background: var(--amber-100);
}

.diagnostics-card {
    background: linear-gradient(145deg, #ffffff 0%, #f7fbff 100%);
}

.diagnostic-action {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.button {
    min-height: 44px;
    padding: 9px 16px;
    border: 1px solid var(--blue-700);
    border-radius: var(--radius-sm);
    color: #ffffff;
    background: var(--blue-700);
    box-shadow: 0 7px 14px rgba(30, 90, 215, 0.2);
    cursor: pointer;
    font: inherit;
    font-size: 0.92rem;
    font-weight: 750;
}

.button:hover {
    border-color: var(--blue-800);
    background: var(--blue-800);
}

.button:active {
    transform: translateY(1px);
}

.button-help {
    flex: 1 1 280px;
    margin: 0;
    color: var(--ink-500);
    font-size: 0.84rem;
}

.action-status {
    margin: 12px 0 0;
    padding: 9px 12px;
    border-radius: 7px;
    color: var(--green-800);
    background: var(--green-100);
    font-size: 0.86rem;
}

.action-status.error {
    color: #a33128;
    background: #fff0ee;
}

.rules {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #e1ecf9;
}

.rules summary {
    color: var(--blue-800);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 750;
}

.rules ul {
    display: grid;
    gap: 7px;
    margin: 12px 0 0;
    padding-left: 21px;
    color: var(--ink-600);
    font-size: 0.88rem;
}

.text-link {
    display: inline-flex;
    gap: 7px;
    align-items: center;
    margin-top: 16px;
    font-weight: 750;
    text-decoration: none;
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    max-width: 1120px;
    margin: 0 auto;
    padding: 22px 24px 34px;
    border-top: 1px solid var(--border);
    color: var(--ink-500);
    font-size: 0.8rem;
}

.site-footer p {
    margin: 0;
}

.noscript-note {
    position: fixed;
    right: 16px;
    bottom: 16px;
    left: 16px;
    z-index: 5;
    max-width: 680px;
    margin: auto;
    padding: 12px 15px;
    border: 1px solid #f3b64b;
    border-radius: var(--radius-sm);
    color: var(--amber-800);
    background: var(--amber-100);
    box-shadow: var(--shadow);
}

@media (max-width: 900px) {
    .site-nav {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }

    .nav-links {
        justify-content: flex-start;
    }

    .content-layout {
        grid-template-columns: 1fr;
    }

    .toc {
        position: static;
        grid-template-columns: repeat(5, minmax(0, 1fr));
        align-items: center;
        gap: 3px;
    }

    .toc-title {
        grid-column: 1 / -1;
        margin-bottom: 2px;
    }
}

@media (max-width: 650px) {
    .page-shell {
        width: min(100% - 28px, 1120px);
        padding-top: 22px;
        padding-bottom: 42px;
    }

    .site-nav {
        padding: 12px 14px;
    }

    .nav-links a {
        padding: 5px 6px;
        font-size: 0.78rem;
    }

    .hero {
        margin-bottom: 18px;
        padding: 27px 22px;
    }

    .card {
        padding: 22px 18px;
    }

    .notice {
        padding: 18px;
    }

    .fact-grid {
        grid-template-columns: 1fr;
    }

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

    .toc-title {
        grid-column: 1 / -1;
    }

    .storage-row {
        grid-template-columns: 1fr;
        gap: 7px;
    }

    .storage-state {
        width: max-content;
    }

    .diagnostic-action {
        align-items: stretch;
        flex-direction: column;
    }

    .button {
        width: 100%;
    }

    .site-footer {
        align-items: flex-start;
        flex-direction: column;
        padding-right: 14px;
        padding-left: 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}

@media (forced-colors: active) {
    .brand-mark {
        background: CanvasText;
        box-shadow: none;
    }

    .button,
    .nav-links a.active {
        border: 1px solid ButtonText;
    }

    .button {
        color: ButtonText;
        background: ButtonFace;
    }
}