/* =========================================================================
   amhriset — shared design system
   Used by every public-facing page (landing, product, legal, utility).
   Light + dark aware, no framework dependency.
   ========================================================================= */

/* ---------------------------------------------------------------- tokens */
:root {
    /* Neutral ramp */
    --bg: #ffffff;
    --bg-subtle: #f7f8fb;
    --bg-sunken: #eef1f6;
    --surface: #ffffff;
    --surface-2: #f9fafc;
    --border: #e4e8ef;
    --border-strong: #d3d9e3;

    --text: #0d1220;
    --text-secondary: #4a5567;
    --text-muted: #737f93;
    --text-inverse: #ffffff;

    /* Brand — amhriset indigo/violet */
    --brand: #4f46e5;
    --brand-hover: #4338ca;
    --brand-soft: #eef0ff;
    --brand-border: #d5d8ff;
    --brand-text: #3730a3;

    /* Product accents */
    --childcare: #0ea5a5;
    --childcare-soft: #e6faf8;
    --childcare-text: #0f766e;
    --sipintar: #16a34a;
    --sipintar-soft: #e9f9ee;
    --sipintar-text: #15803d;

    /* Semantic */
    --danger: #dc2626;
    --danger-soft: #fef2f2;
    --danger-border: #fecaca;
    --danger-text: #991b1b;
    --warning: #d97706;
    --warning-soft: #fffbeb;
    --warning-border: #fde68a;
    --warning-text: #92400e;
    --success: #16a34a;
    --success-soft: #f0fdf4;
    --success-border: #bbf7d0;
    --success-text: #166534;

    /* Ink surfaces (hero / footer) */
    --ink: #0b1020;
    --ink-2: #131a30;
    --ink-border: #232c47;
    --ink-text: #e7eaf3;
    --ink-muted: #98a3bd;

    /* Shape & depth */
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-pill: 999px;

    --shadow-xs: 0 1px 2px rgba(13, 18, 32, .05);
    --shadow-sm: 0 1px 3px rgba(13, 18, 32, .06), 0 1px 2px rgba(13, 18, 32, .04);
    --shadow: 0 4px 16px rgba(13, 18, 32, .07), 0 1px 3px rgba(13, 18, 32, .05);
    --shadow-lg: 0 18px 48px -12px rgba(13, 18, 32, .18), 0 4px 12px rgba(13, 18, 32, .06);

    /* Type */
    --font: 'Plus Jakarta Sans', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

    /* Layout */
    --container: 1180px;
    --container-narrow: 780px;
    --nav-h: 68px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b1020;
        --bg-subtle: #0f1526;
        --bg-sunken: #0a0e1b;
        --surface: #141b2e;
        --surface-2: #1a2237;
        --border: #253052;
        --border-strong: #33406a;

        --text: #eef1f8;
        --text-secondary: #b3bdd4;
        --text-muted: #8590ab;

        --brand: #818cf8;
        --brand-hover: #a5b0fb;
        --brand-soft: #1b2247;
        --brand-border: #2e3970;
        --brand-text: #c7cdfe;

        --childcare: #2dd4bf;
        --childcare-soft: #0f2c2c;
        --childcare-text: #7ff0e2;
        --sipintar: #4ade80;
        --sipintar-soft: #102a1a;
        --sipintar-text: #a5f3bd;

        --danger-soft: #2a1416;
        --danger-border: #5a2226;
        --danger-text: #fca5a5;
        --warning-soft: #2a2010;
        --warning-border: #5c451a;
        --warning-text: #fcd34d;
        --success-soft: #10261a;
        --success-border: #1e5136;
        --success-text: #86efac;

        --shadow-xs: 0 1px 2px rgba(0, 0, 0, .4);
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, .45);
        --shadow: 0 4px 16px rgba(0, 0, 0, .45);
        --shadow-lg: 0 18px 48px -12px rgba(0, 0, 0, .6);
    }
}

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

* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-h) + 16px);
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    font-feature-settings: 'cv11', 'ss01';
}

img,
svg,
video {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: var(--brand);
    text-decoration: none;
}

a:hover {
    color: var(--brand-hover);
}

ul,
ol {
    list-style: none;
}

button {
    font: inherit;
    color: inherit;
    background: none;
    border: 0;
    cursor: pointer;
}

:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 3px;
    border-radius: 4px;
}

::selection {
    background: var(--brand);
    color: #fff;
}

/* ------------------------------------------------------------ typography */
h1,
h2,
h3,
h4 {
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -.022em;
    color: var(--text);
    text-wrap: balance;
}

h1 {
    font-size: clamp(2.1rem, 1.35rem + 3.2vw, 3.75rem);
    font-weight: 800;
    letter-spacing: -.034em;
}

h2 {
    font-size: clamp(1.6rem, 1.15rem + 1.9vw, 2.5rem);
    letter-spacing: -.028em;
}

h3 {
    font-size: clamp(1.13rem, 1rem + .5vw, 1.35rem);
}

h4 {
    font-size: 1.02rem;
}

p {
    text-wrap: pretty;
}

.lead {
    font-size: clamp(1.03rem, .97rem + .3vw, 1.19rem);
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 66ch;
}

.muted {
    color: var(--text-muted);
}

.small {
    font-size: .875rem;
}

.tabular {
    font-variant-numeric: tabular-nums;
}

/* --------------------------------------------------------------- layout */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: clamp(18px, 4vw, 32px);
}

.container-narrow {
    max-width: var(--container-narrow);
}

.section {
    padding-block: clamp(56px, 8vw, 104px);
}

.section-tight {
    padding-block: clamp(40px, 5vw, 64px);
}

.section-subtle {
    background: var(--bg-subtle);
}

.stack>*+* {
    margin-top: var(--stack, 16px);
}

.grid {
    display: grid;
    gap: clamp(16px, 2.2vw, 26px);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 265px), 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 205px), 1fr));
}

.center {
    text-align: center;
}

.center .lead,
.center .section-head p {
    margin-inline: auto;
}

.row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

/* ------------------------------------------------------------ section head */
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .09em;
    text-transform: uppercase;
    color: var(--brand);
    margin-bottom: 14px;
}

.eyebrow::before {
    content: '';
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: currentColor;
    opacity: .5;
}

.center .eyebrow::before {
    display: none;
}

.section-head {
    max-width: 68ch;
    margin-bottom: clamp(32px, 4vw, 52px);
}

.section-head p {
    margin-top: 14px;
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* -------------------------------------------------------------- navbar */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color .25s ease, box-shadow .25s ease;
}

.nav[data-scrolled='true'] {
    border-bottom-color: var(--border);
    box-shadow: var(--shadow-xs);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    height: var(--nav-h);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.06rem;
    letter-spacing: -.03em;
    color: var(--text);
}

.brand:hover {
    color: var(--text);
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border-radius: 9px;
    background: linear-gradient(135deg, var(--brand), #7c3aed);
    color: #fff;
    font-size: .82rem;
    font-weight: 800;
    letter-spacing: -.04em;
    box-shadow: 0 2px 8px color-mix(in srgb, var(--brand) 40%, transparent);
}

.brand-mark img {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

.brand-sub {
    color: var(--text-muted);
    font-weight: 600;
}

/* Holds the links and the CTA on one row. Without an explicit display here
   it falls back to `block` on desktop and the CTA drops below the links —
   the mobile rule below then flips it to a stacked column on purpose. */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 18px;
}

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

.nav-links a {
    display: block;
    padding: 8px 13px;
    border-radius: var(--radius-sm);
    font-size: .925rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: color .18s ease, background-color .18s ease;
}

.nav-links a:hover {
    color: var(--text);
    background: var(--bg-sunken);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    place-items: center;
}

.nav-toggle:hover {
    background: var(--bg-sunken);
}

@media (max-width: 860px) {
    .nav-toggle {
        display: grid;
    }

    .nav-menu {
        position: absolute;
        left: 0;
        right: 0;
        top: var(--nav-h);
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 14px clamp(18px, 4vw, 32px) 22px;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow);
    }

    .nav-menu[data-open='true'] {
        display: flex;
    }

    .nav-menu .nav-links {
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
    }

    .nav-menu .nav-links a {
        padding: 11px 12px;
    }

    .nav-menu .nav-actions {
        margin-top: 8px;
    }

    .nav-menu .btn {
        width: 100%;
        justify-content: center;
    }
}

/* -------------------------------------------------------------- buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    padding: 12px 22px;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    font-size: .95rem;
    font-weight: 700;
    letter-spacing: -.01em;
    line-height: 1.2;
    white-space: nowrap;
    cursor: pointer;
    transition: transform .16s cubic-bezier(.34, 1.4, .64, 1), background-color .18s ease, border-color .18s ease, box-shadow .18s ease, color .18s ease;
}

.btn:active {
    transform: translateY(1px) scale(.99);
}

.btn-sm {
    padding: 8px 16px;
    font-size: .875rem;
}

.btn-lg {
    padding: 15px 30px;
    font-size: 1.01rem;
}

.btn-primary {
    background: var(--brand);
    color: #fff;
    box-shadow: 0 6px 20px -6px color-mix(in srgb, var(--brand) 65%, transparent);
}

.btn-primary:hover {
    background: var(--brand-hover);
    color: #fff;
    box-shadow: 0 10px 26px -6px color-mix(in srgb, var(--brand) 70%, transparent);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
    background: var(--bg-sunken);
    color: var(--text);
    transform: translateY(-1px);
}

.btn-ghost {
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-sunken);
    color: var(--text);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
    box-shadow: 0 6px 20px -6px color-mix(in srgb, var(--danger) 65%, transparent);
}

.btn-danger:hover {
    background: #b91c1c;
    color: #fff;
    transform: translateY(-1px);
}

/* On ink (dark hero) surfaces */
.on-ink .btn-primary {
    background: #fff;
    color: var(--ink);
    box-shadow: 0 8px 24px -8px rgba(0, 0, 0, .6);
}

.on-ink .btn-primary:hover {
    background: #eef1f8;
    color: var(--ink);
}

.on-ink .btn-secondary {
    background: rgba(255, 255, 255, .07);
    border-color: rgba(255, 255, 255, .22);
    color: #fff;
    backdrop-filter: blur(8px);
}

.on-ink .btn-secondary:hover {
    background: rgba(255, 255, 255, .14);
    color: #fff;
}

.btn[disabled],
.btn[aria-disabled='true'] {
    opacity: .5;
    pointer-events: none;
}

/* ---------------------------------------------------------------- cards */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: clamp(22px, 2.6vw, 30px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform .28s cubic-bezier(.2, .8, .3, 1), box-shadow .28s ease, border-color .28s ease;
}

.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-strong);
}

.card>h3 {
    margin-bottom: 10px;
}

.card>p {
    color: var(--text-secondary);
}

.card-accent::before {
    content: '';
    position: absolute;
    inset: 0 0 auto;
    height: 3px;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    background: linear-gradient(90deg, var(--accent, var(--brand)), transparent);
    opacity: 0;
    transition: opacity .3s ease;
}

.card-hover:hover.card-accent::before {
    opacity: 1;
}

.card-icon {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    margin-bottom: 18px;
    border-radius: 13px;
    font-size: 1.4rem;
    background: var(--accent-soft, var(--brand-soft));
    color: var(--accent, var(--brand));
    border: 1px solid color-mix(in srgb, var(--accent, var(--brand)) 22%, transparent);
}

.card-footer {
    margin-top: auto;
    padding-top: 22px;
}

/* ----------------------------------------------------------- chips/badges */
.chip {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 13px;
    border-radius: var(--radius-pill);
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: -.005em;
    background: var(--bg-sunken);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.chip-brand {
    background: var(--brand-soft);
    color: var(--brand-text);
    border-color: var(--brand-border);
}

.chip-childcare {
    background: var(--childcare-soft);
    color: var(--childcare-text);
    border-color: color-mix(in srgb, var(--childcare) 28%, transparent);
}

.chip-sipintar {
    background: var(--sipintar-soft);
    color: var(--sipintar-text);
    border-color: color-mix(in srgb, var(--sipintar) 28%, transparent);
}

.chip-ink {
    background: rgba(255, 255, 255, .06);
    border-color: rgba(255, 255, 255, .16);
    color: var(--ink-text);
    backdrop-filter: blur(8px);
}

.chip-dot::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 0 3px color-mix(in srgb, currentColor 22%, transparent);
}

/* ----------------------------------------------------------------- hero */
.hero {
    position: relative;
    isolation: isolate;
    padding-block: clamp(64px, 9vw, 118px);
    background: var(--ink);
    color: var(--ink-text);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: -30% -10% auto;
    height: 90%;
    z-index: -2;
    background:
        radial-gradient(48% 60% at 22% 18%, color-mix(in srgb, var(--brand) 42%, transparent) 0%, transparent 62%),
        radial-gradient(42% 55% at 82% 8%, rgba(124, 58, 237, .32) 0%, transparent 60%);
    filter: blur(6px);
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(80% 70% at 50% 0%, #000 0%, transparent 78%);
    -webkit-mask-image: radial-gradient(80% 70% at 50% 0%, #000 0%, transparent 78%);
}

.hero h1 {
    color: #fff;
    max-width: 17ch;
}

.hero .lead {
    color: var(--ink-muted);
    margin-top: 20px;
    max-width: 60ch;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

.hero-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 34px;
}

.hero-split {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: clamp(32px, 5vw, 64px);
    align-items: center;
}

@media (max-width: 940px) {
    .hero-split {
        grid-template-columns: 1fr;
    }
}

/* Page header (lighter hero for legal / utility pages) */
.page-head {
    position: relative;
    padding-block: clamp(44px, 6vw, 76px);
    background: var(--bg-subtle);
    border-bottom: 1px solid var(--border);
}

.page-head h1 {
    font-size: clamp(1.85rem, 1.3rem + 2.2vw, 2.85rem);
}

.page-head p {
    margin-top: 14px;
    color: var(--text-secondary);
    max-width: 62ch;
}

/* ---------------------------------------------------------------- stats */
.stat {
    padding: 24px 22px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
    text-align: center;
    transition: transform .25s ease, box-shadow .25s ease;
}

.stat:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.stat-value {
    font-size: clamp(1.75rem, 1.4rem + 1.4vw, 2.35rem);
    font-weight: 800;
    letter-spacing: -.035em;
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
    background: linear-gradient(135deg, var(--brand), #a855f7);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.stat-label {
    margin-top: 6px;
    font-size: .88rem;
    font-weight: 600;
    color: var(--text-muted);
}

.on-ink .stat {
    background: rgba(255, 255, 255, .045);
    border-color: rgba(255, 255, 255, .1);
    backdrop-filter: blur(10px);
}

.on-ink .stat-value {
    background: none;
    -webkit-background-clip: initial;
    background-clip: initial;
    color: #fff;
}

.on-ink .stat-label {
    color: var(--ink-muted);
}

/* --------------------------------------------------------------- lists */
.list-check {
    display: grid;
    gap: 11px;
}

.list-check li {
    position: relative;
    padding-left: 30px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* The tick is drawn from `currentColor` rather than an SVG data URI so a
   `--check` override actually recolours the mark, border, and fill together. */
.list-check li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: .28em;
    display: grid;
    place-items: center;
    width: 19px;
    height: 19px;
    border-radius: 50%;
    font-size: .7rem;
    font-weight: 800;
    line-height: 1;
    color: var(--check, var(--success));
    background: color-mix(in srgb, var(--check, var(--success)) 12%, transparent);
    border: 1px solid color-mix(in srgb, var(--check, var(--success)) 32%, transparent);
}

.list-check strong {
    color: var(--text);
    font-weight: 700;
}

/* Numbered steps */
.steps {
    counter-reset: step;
    display: grid;
    gap: clamp(16px, 2.2vw, 24px);
}

.step {
    position: relative;
    counter-increment: step;
    padding: 26px 24px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.step::before {
    content: counter(step);
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    margin-bottom: 16px;
    border-radius: 11px;
    background: linear-gradient(135deg, var(--brand), #7c3aed);
    color: #fff;
    font-size: .95rem;
    font-weight: 800;
    box-shadow: 0 4px 12px -3px color-mix(in srgb, var(--brand) 60%, transparent);
}

.step h3 {
    margin-bottom: 8px;
}

.step p {
    color: var(--text-secondary);
    font-size: .95rem;
}

/* ------------------------------------------------------------ data rows */
.spec {
    display: grid;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--surface);
}

.spec-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
    justify-content: space-between;
    align-items: baseline;
    padding: 14px 18px;
}

.spec-row+.spec-row {
    border-top: 1px solid var(--border);
}

.spec-key {
    font-size: .9rem;
    font-weight: 600;
    color: var(--text-muted);
}

.spec-val {
    font-weight: 700;
    color: var(--text);
    font-variant-numeric: tabular-nums;
}

/* ---------------------------------------------------------------- CTA */
.cta-panel {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    padding: clamp(38px, 5.5vw, 68px) clamp(24px, 4vw, 56px);
    border-radius: var(--radius-xl);
    background: var(--ink);
    color: var(--ink-text);
    text-align: center;
}

.cta-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(58% 90% at 15% 0%, color-mix(in srgb, var(--brand) 48%, transparent) 0%, transparent 60%),
        radial-gradient(50% 80% at 88% 100%, rgba(168, 85, 247, .34) 0%, transparent 62%);
}

.cta-panel h2 {
    color: #fff;
}

.cta-panel p {
    margin: 16px auto 0;
    max-width: 60ch;
    color: var(--ink-muted);
}

.cta-panel .hero-actions {
    justify-content: center;
}

/* ---------------------------------------------------------- prose (legal) */
.prose {
    max-width: 72ch;
    color: var(--text-secondary);
    font-size: 1.02rem;
    line-height: 1.78;
}

.prose>*+* {
    margin-top: 1.1em;
}

.prose h2 {
    margin-top: 2.2em;
    font-size: clamp(1.25rem, 1.1rem + .7vw, 1.55rem);
    color: var(--text);
    scroll-margin-top: calc(var(--nav-h) + 20px);
}

.prose h2:first-child {
    margin-top: 0;
}

.prose h3 {
    margin-top: 1.7em;
    font-size: 1.08rem;
    color: var(--text);
}

.prose strong {
    color: var(--text);
    font-weight: 700;
}

.prose a {
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1.5px;
}

.prose ul,
.prose ol {
    display: grid;
    gap: 9px;
    padding-left: 4px;
}

.prose ul li,
.prose ol li {
    position: relative;
    padding-left: 24px;
}

.prose ul li::before {
    content: '';
    position: absolute;
    left: 6px;
    top: .72em;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--brand);
    opacity: .65;
}

.prose ol {
    counter-reset: li;
}

.prose ol li {
    counter-increment: li;
}

.prose ol li::before {
    content: counter(li) '.';
    position: absolute;
    left: 0;
    font-weight: 700;
    color: var(--brand);
    font-variant-numeric: tabular-nums;
}

.prose hr {
    margin-block: 2.4em;
    border: 0;
    border-top: 1px solid var(--border);
}

/* Table of contents rail */
.doc-layout {
    display: grid;
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(28px, 5vw, 64px);
    align-items: start;
}

@media (max-width: 940px) {
    .doc-layout {
        grid-template-columns: 1fr;
    }

    .toc {
        display: none;
    }
}

.toc {
    position: sticky;
    top: calc(var(--nav-h) + 28px);
}

.toc-title {
    font-size: .74rem;
    font-weight: 800;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.toc ul {
    display: grid;
    gap: 1px;
    border-left: 2px solid var(--border);
}

.toc a {
    display: block;
    padding: 7px 0 7px 14px;
    margin-left: -2px;
    border-left: 2px solid transparent;
    font-size: .885rem;
    font-weight: 600;
    color: var(--text-muted);
    line-height: 1.4;
    transition: color .18s ease, border-color .18s ease;
}

.toc a:hover,
.toc a[aria-current='true'] {
    color: var(--brand);
    border-left-color: var(--brand);
}

/* --------------------------------------------------------------- notes */
.note {
    display: flex;
    gap: 14px;
    padding: 17px 19px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface-2);
    color: var(--text-secondary);
    font-size: .95rem;
    line-height: 1.6;
}

.note strong {
    display: block;
    margin-bottom: 3px;
    color: var(--text);
    font-weight: 700;
}

.note-icon {
    flex: none;
    font-size: 1.15rem;
    line-height: 1.35;
}

.note-danger {
    background: var(--danger-soft);
    border-color: var(--danger-border);
    color: var(--danger-text);
}

.note-danger strong {
    color: var(--danger-text);
}

.note-warning {
    background: var(--warning-soft);
    border-color: var(--warning-border);
    color: var(--warning-text);
}

.note-warning strong {
    color: var(--warning-text);
}

.note-success {
    background: var(--success-soft);
    border-color: var(--success-border);
    color: var(--success-text);
}

.note-success strong {
    color: var(--success-text);
}

/* ---------------------------------------------------------------- forms */
.form-field {
    display: grid;
    gap: 7px;
}

.form-field+.form-field {
    margin-top: 18px;
}

.form-label {
    font-size: .9rem;
    font-weight: 700;
    color: var(--text);
}

.form-hint {
    font-size: .84rem;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    font: inherit;
    font-size: .97rem;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    transition: border-color .18s ease, box-shadow .18s ease;
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 3.5px color-mix(in srgb, var(--brand) 16%, transparent);
}

.form-control[aria-invalid='true'] {
    border-color: var(--danger);
}

.form-error {
    font-size: .85rem;
    font-weight: 600;
    color: var(--danger);
}

.form-check {
    display: flex;
    align-items: flex-start;
    gap: 11px;
    font-size: .93rem;
    color: var(--text-secondary);
    line-height: 1.55;
    cursor: pointer;
}

.form-check input {
    flex: none;
    width: 18px;
    height: 18px;
    margin-top: 2px;
    accent-color: var(--brand);
    cursor: pointer;
}

/* --------------------------------------------------------------- footer */
.footer {
    padding-block: clamp(44px, 5vw, 64px) 28px;
    background: var(--bg-subtle);
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.6fr) repeat(auto-fit, minmax(140px, 1fr));
    gap: clamp(28px, 4vw, 56px);
}

.footer-about p {
    margin-top: 14px;
    max-width: 42ch;
    font-size: .93rem;
    color: var(--text-muted);
}

.footer h4 {
    font-size: .76rem;
    font-weight: 800;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.footer-links {
    display: grid;
    gap: 9px;
}

.footer-links a {
    font-size: .93rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--brand);
}

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 24px;
    justify-content: space-between;
    align-items: center;
    margin-top: clamp(32px, 4vw, 48px);
    padding-top: 24px;
    border-top: 1px solid var(--border);
    font-size: .88rem;
    color: var(--text-muted);
}

/* --------------------------------------------------------- scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity .7s cubic-bezier(.2, .8, .3, 1), transform .7s cubic-bezier(.2, .8, .3, 1);
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {

    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* ------------------------------------------------------------- utilities */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: 8px;
    left: 8px;
    z-index: 200;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    background: var(--brand);
    color: #fff;
    font-weight: 700;
    transform: translateY(-160%);
    transition: transform .2s ease;
}

.skip-link:focus {
    transform: none;
    color: #fff;
}

.mt-0 {
    margin-top: 0 !important;
}

.mt-2 {
    margin-top: 8px;
}

.mt-3 {
    margin-top: 16px;
}

.mt-4 {
    margin-top: 24px;
}

.mt-5 {
    margin-top: 32px;
}

.mt-6 {
    margin-top: 48px;
}