*, *::before, *::after {
    box-sizing: border-box;
}

:root {
    --font: -apple-system, "SF Pro Display", BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    --radius-card: 28px;
    --radius-pill: 999px;
    --content-width: 860px;
    --frame-scale: 1.18;
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --frame-width: min(calc(var(--content-width) * var(--frame-scale)), calc(100vw - 2rem - var(--safe-left) - var(--safe-right)));
    --chrome-width: min(1110px, calc(100vw - 2rem - var(--safe-left) - var(--safe-right)));
    --header-radius: 20px;

    --ink: rgba(10, 10, 20, 0.88);
    --ink-dim: rgba(10, 10, 20, 0.52);
    --ink-faint: rgba(10, 10, 20, 0.30);

    --accent: #0a84ff;
    --accent-dark: #0066cc;
    --accent-glow: rgba(10, 132, 255, 0.30);

    --glass-bg: rgba(255, 255, 255, 0.10);
    --glass-border: rgba(255, 255, 255, 0.68);
    --glass-shadow:
        0 24px 64px rgba(0, 0, 0, 0.12),
        0 4px 16px rgba(0, 0, 0, 0.07);

    --page-pad-top: 6rem;
    --page-pad-bottom: 2.5rem;
}

html.display-mode-standalone body {
    --page-pad-top: 4.6rem;
    --page-pad-bottom: 1.75rem;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100%;
    background-color: #dde8f5;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    min-height: 100svh;
    min-height: 100dvh;
    position: relative;
    overflow-x: hidden;
    touch-action: manipulation;
    background:
        radial-gradient(ellipse 58% 34% at 50% 0%, rgba(255, 255, 255, 0.88) 0%, rgba(255, 255, 255, 0.38) 42%, transparent 78%),
        radial-gradient(ellipse 42% 30% at 52% 28%, rgba(255, 255, 255, 0.34) 0%, rgba(212, 236, 255, 0.22) 38%, transparent 74%),
        radial-gradient(ellipse 65% 55% at 10% 18%, #a8ccff 0%, transparent 58%),
        radial-gradient(ellipse 55% 65% at 90% 80%, #c8b4ff 0%, transparent 58%),
        radial-gradient(ellipse 75% 45% at 50% 50%, #b4e8fb 0%, transparent 62%),
        #dde8f5;
    background-size: 118% 108%, 108% 108%, 120% 120%, 125% 125%, 115% 115%, 100% 100%;
    background-attachment: fixed;
    padding-top: calc(var(--page-pad-top) + var(--safe-top));
    padding-right: calc(1rem + var(--safe-right));
    padding-bottom: calc(var(--page-pad-bottom) + var(--safe-bottom));
    padding-left: calc(1rem + var(--safe-left));
}

body[data-network="offline"] .network-online-only {
    opacity: 0.55;
    pointer-events: none;
}

body::before,
body::after {
    content: "";
    position: fixed;
    inset: auto;
    pointer-events: none;
    z-index: -1;
    filter: blur(42px);
    opacity: 0.72;
    will-change: transform, opacity;
}

body::before {
    top: 12%;
    left: -4%;
    width: 28rem;
    height: 28rem;
    border-radius: 42% 58% 57% 43% / 43% 38% 62% 57%;
    background: radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.84) 0%, rgba(203, 229, 255, 0.72) 26%, rgba(120, 183, 255, 0.30) 52%, rgba(168, 204, 255, 0.08) 76%, transparent 100%);
}

body::after {
    right: -6%;
    bottom: 4%;
    width: 32rem;
    height: 32rem;
    border-radius: 58% 42% 39% 61% / 47% 53% 47% 53%;
    background: radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.56) 0%, rgba(219, 200, 255, 0.50) 28%, rgba(178, 222, 255, 0.30) 54%, rgba(180, 232, 251, 0.08) 80%, transparent 100%);
}

.nav {
    position: fixed;
    top: calc(0.75rem + var(--safe-top));
    left: 0;
    right: 0;
    z-index: 100;
    width: var(--chrome-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    height: 4.7rem;
    border-radius: var(--header-radius);
    backdrop-filter: blur(2px) saturate(280%) brightness(1.04);
    -webkit-backdrop-filter: blur(2px) saturate(280%) brightness(1.04);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.50);
    box-shadow: var(--glass-shadow);
}

.nav-brand,
.footer-brand {
    color: var(--ink);
    text-decoration: none;
    font-weight: 700;
}

.nav-brand {
    font-size: 1rem;
    letter-spacing: -0.01em;
}

.nav-brand:hover,
.footer-brand:hover {
    opacity: 0.75;
}

.nav-sub {
    color: var(--ink-faint);
    font-size: 0.7rem;
    letter-spacing: 0.06em;
    text-decoration: none;
}

.nav-sub:hover {
    color: var(--ink-dim);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.shell {
    width: var(--frame-width);
    margin: 0 auto;
}

.page-layout {
    min-height: calc(100vh - var(--page-pad-top) - var(--page-pad-bottom));
    min-height: calc(100svh - var(--page-pad-top) - var(--page-pad-bottom) - var(--safe-top) - var(--safe-bottom));
    min-height: calc(100dvh - var(--page-pad-top) - var(--page-pad-bottom) - var(--safe-top) - var(--safe-bottom));
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.page-main {
    flex: 1;
    min-height: 0;
}

.page-main--center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-main--center > * {
    width: 100%;
}

.card {
    position: relative;
    border-radius: var(--radius-card);
    background: var(--glass-bg);
    backdrop-filter: blur(1.5px) saturate(260%) contrast(0.90) brightness(1.06);
    -webkit-backdrop-filter: blur(1.5px) saturate(260%) contrast(0.90) brightness(1.06);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.50) 0%,
        rgba(255, 255, 255, 0.14) 26%,
        transparent 52%,
        rgba(255, 255, 255, 0.06) 100%
    );
    z-index: 0;
}

.glass-rim {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    outline: 1.5px solid var(--glass-border);
    outline-offset: 1px;
    pointer-events: none;
    box-shadow:
        inset 0 1.5px 2px rgba(255, 255, 255, 0.85),
        inset 0 -1px 1px rgba(255, 255, 255, 0.28);
    z-index: 10;
}

.card-body {
    position: relative;
    z-index: 1;
    padding: 2rem;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    padding: 0.38rem 0.82rem;
    border-radius: var(--radius-pill);
    background: rgba(10, 132, 255, 0.12);
    border: 1px solid rgba(10, 132, 255, 0.22);
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1 {
    margin: 1rem 0 0;
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.04;
    letter-spacing: -0.03em;
}

.summary {
    margin-top: 1rem;
    max-width: 54rem;
    color: var(--ink-dim);
    line-height: 1.7;
    font-size: 1rem;
}

.meta {
    margin-top: 1.35rem;
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.meta-badge {
    display: inline-flex;
    align-items: center;
    min-height: 2.1rem;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.24);
    border: 1px solid rgba(255, 255, 255, 0.42);
    color: var(--ink-dim);
    font-size: 0.82rem;
    font-weight: 600;
}

.doc-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.6rem;
}

.doc-nav a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.6rem;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-pill);
    text-decoration: none;
    background: rgba(255, 255, 255, 0.24);
    border: 1px solid rgba(255, 255, 255, 0.42);
    color: var(--ink);
    font-size: 0.86rem;
    font-weight: 700;
    transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.doc-nav a:hover {
    transform: translateY(-1px);
    background: rgba(255, 255, 255, 0.34);
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

.doc-nav a.active {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 10px 26px var(--accent-glow);
}

.sections {
    display: grid;
    gap: 1rem;
    margin-top: 1.6rem;
}

.section-card {
    position: relative;
    border-radius: calc(var(--radius-card) - 10px);
    padding: 1.3rem 1.35rem 1.15rem;
    background: rgba(255, 255, 255, 0.22);
    border: 1px solid rgba(255, 255, 255, 0.44);
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.05);
}

.section-card h2 {
    margin: 0 0 0.7rem;
    font-size: 1.05rem;
    line-height: 1.35;
}

.section-card p {
    margin: 0;
    color: var(--ink-dim);
    line-height: 1.72;
    font-size: 0.95rem;
}

.section-card p + p {
    margin-top: 0.8rem;
}

.status {
    margin-top: 1.5rem;
    color: var(--ink-dim);
    font-size: 0.92rem;
    line-height: 1.6;
}

.status.error {
    color: #c63b2d;
}

.footer {
    width: var(--chrome-width);
    margin: 0 auto;
    min-height: 3.4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 2rem;
    border-radius: calc(var(--radius-card) - 8px);
    backdrop-filter: blur(2px) saturate(280%) brightness(1.04);
    -webkit-backdrop-filter: blur(2px) saturate(280%) brightness(1.04);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.50);
    box-shadow: var(--glass-shadow);
}

.footer-stack {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.24rem;
}

.footer-links {
    font-size: 0.62rem;
    color: var(--ink-dim);
    text-align: right;
    line-height: 1.4;
}

.footer-links a,
.footer-copy a {
    color: inherit;
    text-decoration: none;
}

.footer-links a:hover,
.footer-copy a:hover {
    color: var(--ink);
}

.footer-copy {
    font-size: 0.6rem;
    color: var(--ink-faint);
    text-transform: uppercase;
    letter-spacing: 0.14em;
}

@media (max-width: 760px) {
    body {
        --page-pad-top: 5.6rem;
        --page-pad-bottom: 2rem;
    }

    .nav,
    .footer {
        width: calc(100vw - 2rem - var(--safe-left) - var(--safe-right));
    }

    .shell {
        width: calc(100vw - 2rem - var(--safe-left) - var(--safe-right));
    }

    .nav,
    .footer {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .footer {
        gap: 0.75rem;
        align-items: flex-start;
        flex-direction: column;
    }

    .footer-stack {
        width: 100%;
        align-items: flex-start;
    }

    .footer-links {
        text-align: left;
    }

    .card-body {
        padding: 1.35rem;
    }

    .doc-nav {
        gap: 0.55rem;
    }

    .doc-nav a {
        width: 100%;
    }
}

@media (hover: none) and (pointer: coarse) {
    body {
        background-attachment: scroll;
    }
}

@media (display-mode: standalone) {
    .nav {
        top: calc(0.35rem + var(--safe-top));
    }

    .page-layout {
        gap: 1.5rem;
    }
}

@media (prefers-color-scheme: dark) {
    body {
        background:
            radial-gradient(ellipse 58% 34% at 50% 0%, rgba(255, 255, 255, 0.10) 0%, rgba(255, 255, 255, 0.03) 42%, transparent 78%),
            radial-gradient(ellipse 42% 30% at 52% 28%, rgba(170, 210, 255, 0.10) 0%, rgba(80, 120, 210, 0.08) 38%, transparent 74%),
            radial-gradient(ellipse 60% 50% at 10% 18%, rgba(20, 60, 140, 0.85) 0%, transparent 55%),
            radial-gradient(ellipse 55% 60% at 90% 80%, rgba(80, 30, 140, 0.80) 0%, transparent 55%),
            radial-gradient(ellipse 70% 45% at 50% 50%, rgba(10, 60, 100, 0.60) 0%, transparent 62%),
            #0b0d18;
        background-size: 118% 108%, 108% 108%, 120% 120%, 125% 125%, 115% 115%, 100% 100%;
    }

    body::before {
        background: radial-gradient(circle at 35% 35%, rgba(196, 223, 255, 0.22) 0%, rgba(93, 146, 240, 0.22) 30%, rgba(52, 96, 192, 0.12) 56%, rgba(18, 37, 88, 0.02) 78%, transparent 100%);
        opacity: 0.52;
    }

    body::after {
        background: radial-gradient(circle at 40% 40%, rgba(216, 198, 255, 0.18) 0%, rgba(126, 91, 212, 0.20) 30%, rgba(57, 120, 198, 0.14) 56%, rgba(14, 34, 84, 0.03) 80%, transparent 100%);
        opacity: 0.44;
    }

    :root {
        --ink: rgba(255, 255, 255, 0.90);
        --ink-dim: rgba(255, 255, 255, 0.55);
        --ink-faint: rgba(255, 255, 255, 0.30);
        --glass-bg: rgba(255, 255, 255, 0.07);
        --glass-border: rgba(255, 255, 255, 0.18);
        --glass-shadow:
            0 24px 64px rgba(0, 0, 0, 0.45),
            0 4px 16px rgba(0, 0, 0, 0.25);
    }

    .card::before {
        background: linear-gradient(
            135deg,
            rgba(255, 255, 255, 0.18) 0%,
            rgba(255, 255, 255, 0.06) 26%,
            transparent 52%,
            rgba(255, 255, 255, 0.03) 100%
        );
    }

    .section-card,
    .doc-nav a,
    .meta-badge {
        background: rgba(255, 255, 255, 0.10);
        border-color: rgba(255, 255, 255, 0.20);
    }

    .doc-nav a:hover {
        background: rgba(255, 255, 255, 0.14);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
    }

    .doc-nav a.active {
        color: #052e16;
        background: #22c55e;
        box-shadow: 0 10px 26px rgba(34, 197, 94, 0.24);
    }

    .status.error {
        color: #ff8a7a;
    }
}