:root {
    color-scheme: light dark;
    --bg: #f5f6fa;
    --surface: #ffffff;
    --surface-2: #eef0f6;
    --text: #1f2430;
    --muted: #5b6472;
    --accent: #4f46e5;
    --accent-2: #7c3aed;
    --ok: #047857;
    --ok-bg: #ecfdf5;
    --ok-border: #a7f3d0;
    --warn: #dc2626;
    --warn-bg: rgba(220, 38, 38, 0.06);
    --warn-border: rgba(220, 38, 38, 0.3);
    --border: #e4e7ee;
    --shadow: 0 10px 30px rgba(31, 36, 48, 0.07);
}

:root[data-theme="dark"] {
    --bg: #0f1117;
    --surface: #171a22;
    --surface-2: #1e222d;
    --text: #e6e8ee;
    --muted: #9aa3b2;
    --accent: #8b93ff;
    --accent-2: #b79bff;
    --ok: #6ee7b7;
    --ok-bg: rgba(16, 185, 129, 0.08);
    --ok-border: rgba(110, 231, 183, 0.35);
    --warn: #f87171;
    --warn-bg: rgba(248, 113, 113, 0.08);
    --warn-border: rgba(248, 113, 113, 0.35);
    --border: #262b38;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

    * {
        transition: none !important;
    }
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
}

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

.skip-link {
    position: absolute;
    left: 16px;
    top: -60px;
    z-index: 100;
    background: var(--surface);
    color: var(--text);
    padding: 10px 16px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: top 0.2s ease;
}

.skip-link:focus {
    top: 12px;
}

/* ---------- Top bar ---------- */
.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px clamp(16px, 4vw, 32px);
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.topbar-brand {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
    text-decoration: none;
    white-space: nowrap;
}

.topbar-brand span {
    color: var(--muted);
    font-weight: 500;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    font-size: 1.05rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.theme-toggle:hover {
    border-color: var(--accent);
}

.theme-toggle:active {
    transform: scale(0.94);
}

:root[data-theme="dark"] .icon-sun { display: inline; }
:root[data-theme="dark"] .icon-moon { display: none; }
:root[data-theme="light"] .icon-sun { display: none; }
:root[data-theme="light"] .icon-moon { display: inline; }

/* ---------- Layout ---------- */
.layout {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 clamp(16px, 4vw, 32px);
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

/* Let children shrink below their content minimum so wide descendants
   (e.g. the services table) scroll inside their wrapper on small screens
   instead of stretching the whole page. */
.layout > main,
.layout > aside {
    min-width: 0;
}

@media (min-width: 1024px) {
    .layout {
        grid-template-columns: minmax(0, 1fr) 250px;
        align-items: start;
    }

    .layout > main {
        order: 1;
    }

    .layout > aside {
        order: 2;
    }
}

/* Single-column layout for pages without a table of contents */
.layout.narrow {
    max-width: 800px;
    grid-template-columns: minmax(0, 1fr);
}

/* ---------- Hero ---------- */
.hero {
    padding: clamp(36px, 7vw, 72px) 0 28px;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    max-width: 100%;
    overflow-wrap: anywhere;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    background: color-mix(in srgb, var(--accent) 10%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 18px;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.hero h1 .gradient {
    background: linear-gradient(120deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    max-width: 560px;
    margin: 0 auto;
    color: var(--muted);
    font-size: 1.05rem;
}

.hero-meta {
    margin-top: 18px;
    font-size: 0.9rem;
    color: var(--muted);
}

/* ---------- Sub navigation (between related pages) ---------- */
.subnav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin: -8px 0 36px;
}

.subnav a {
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--muted);
    transition: color 0.15s ease, border-color 0.15s ease;
}

.subnav a:hover {
    color: var(--text);
    border-color: var(--accent);
}

.subnav a.current {
    color: var(--accent);
    border-color: color-mix(in srgb, var(--accent) 40%, transparent);
    background: color-mix(in srgb, var(--accent) 8%, transparent);
}

/* ---------- Quick facts ---------- */
.facts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
    margin: 8px 0 36px;
}

.fact {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px 18px;
    box-shadow: var(--shadow);
}

.fact strong {
    display: block;
    font-size: 0.98rem;
    margin-bottom: 2px;
}

.fact span {
    font-size: 0.85rem;
    color: var(--muted);
}

.fact-icon {
    font-size: 1.2rem;
    display: block;
    margin-bottom: 8px;
}

/* ---------- Callouts ---------- */
.summary {
    background: var(--ok-bg);
    border: 1px solid var(--ok-border);
    border-left: 5px solid var(--ok);
    border-radius: 12px;
    padding: 18px 20px;
    margin-bottom: 36px;
}

.summary strong {
    color: var(--ok);
}

.notice {
    background: color-mix(in srgb, var(--accent-2) 7%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent-2) 30%, transparent);
    border-left: 5px solid var(--accent-2);
    border-radius: 12px;
    padding: 18px 20px;
    margin-bottom: 36px;
}

.notice strong {
    color: var(--accent-2);
}

.warn {
    background: var(--warn-bg);
    border: 1px solid var(--warn-border);
    border-left: 5px solid var(--warn);
    border-radius: 12px;
    padding: 16px 18px;
    margin: 14px 0;
}

.warn strong {
    color: var(--warn);
}

/* ---------- Big call-to-action ---------- */
.cta-card {
    text-align: center;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: clamp(24px, 5vw, 40px);
    box-shadow: var(--shadow);
    margin-bottom: 36px;
}

.cta-card h2 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.cta-card > p {
    color: var(--muted);
    margin-bottom: 22px;
}

.btn-mail {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.05rem;
    padding: 16px 28px;
    border-radius: 14px;
    box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 35%, transparent);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-mail:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 26px color-mix(in srgb, var(--accent) 45%, transparent);
}

.cta-alt {
    margin-top: 16px;
    font-size: 0.92rem;
    color: var(--muted);
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font: inherit;
    font-size: 0.88rem;
    color: var(--accent);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 5px 12px;
    cursor: pointer;
    transition: border-color 0.15s ease;
}

.copy-btn:hover {
    border-color: var(--accent);
}

/* ---------- Steps ---------- */
.steps {
    list-style: none;
    counter-reset: step;
    margin: 0 0 12px;
    padding: 0;
}

.steps li {
    counter-increment: step;
    position: relative;
    padding: 0 0 20px 52px;
    color: var(--muted);
}

.steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: -2px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: color-mix(in srgb, var(--accent) 12%, transparent);
    color: var(--accent);
    font-weight: 700;
    border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
}

.steps li::after {
    content: '';
    position: absolute;
    left: 16px;
    top: 36px;
    bottom: 2px;
    width: 2px;
    background: var(--border);
}

.steps li:last-child {
    padding-bottom: 0;
}

.steps li:last-child::after {
    display: none;
}

/* ---------- Table ---------- */
.table-wrap {
    overflow-x: auto;
    margin: 0 0 12px;
    border: 1px solid var(--border);
    border-radius: 12px;
}

.svc {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    min-width: 560px;
}

.svc th,
.svc td {
    text-align: left;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
    color: var(--muted);
}

.svc th {
    background: var(--surface-2);
    color: var(--text);
    font-weight: 700;
    white-space: nowrap;
}

.svc tr:last-child td {
    border-bottom: none;
}

.svc td strong {
    color: var(--text);
}

/* ---------- Table of contents ---------- */
.toc {
    margin-bottom: 36px;
}

.toc-aside {
    display: none;
}

.toc-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: var(--shadow);
}

.toc-card summary {
    list-style: none;
    cursor: pointer;
    padding: 16px 20px;
    font-weight: 700;
    user-select: none;
}

.toc-card summary::-webkit-details-marker {
    display: none;
}

.toc-card summary::after {
    content: '▸';
    float: right;
    color: var(--muted);
    transition: transform 0.2s ease;
}

.toc-card[open] summary::after {
    transform: rotate(90deg);
}

.toc ol {
    list-style: none;
    counter-reset: toc;
    padding: 4px 20px 18px;
}

.toc li {
    counter-increment: toc;
}

.toc a {
    display: flex;
    gap: 10px;
    align-items: baseline;
    padding: 7px 10px;
    margin: 1px -10px;
    border-radius: 8px;
    text-decoration: none;
    color: var(--muted);
    font-size: 0.95rem;
    transition: background 0.15s ease, color 0.15s ease;
}

.toc a::before {
    content: counter(toc, decimal-leading-zero);
    font-size: 0.75rem;
    font-variant-numeric: tabular-nums;
    color: var(--accent);
}

.toc a:hover {
    background: var(--surface-2);
    color: var(--text);
}

.toc a.active {
    color: var(--text);
    font-weight: 600;
    background: var(--surface-2);
}

@media (min-width: 1024px) {
    .toc-nav {
        display: none;
    }

    .toc-aside {
        display: block;
        position: sticky;
        top: 76px;
        margin-bottom: 0;
    }

    .toc-card summary {
        pointer-events: none;
        padding-bottom: 6px;
    }

    .toc-card summary::after {
        display: none;
    }

    .toc ol {
        padding: 0 14px 12px;
    }
}

/* ---------- Document ---------- */
.doc {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: clamp(24px, 5vw, 48px);
    box-shadow: var(--shadow);
    margin-bottom: 36px;
}

.doc section {
    scroll-margin-top: 84px;
    padding-top: 28px;
    margin-top: 8px;
    border-top: 1px solid var(--border);
}

.doc section:first-of-type {
    border-top: none;
    margin-top: 0;
    padding-top: 0;
}

.doc h2 {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 12px;
    display: flex;
    align-items: baseline;
    gap: 10px;
}

.doc h2 .anchor {
    font-size: 1rem;
    text-decoration: none;
    color: var(--muted);
    opacity: 0;
    transition: opacity 0.15s ease;
}

.doc h2:hover .anchor,
.doc h2 .anchor:focus-visible {
    opacity: 1;
}

.doc h3 {
    font-size: 1.05rem;
    margin: 20px 0 8px;
}

.doc code,
.cta-alt strong {
    overflow-wrap: anywhere;
}

.doc p {
    color: var(--muted);
    margin-bottom: 12px;
}

.doc p strong,
.doc li strong,
.doc td strong,
.steps li strong {
    color: var(--text);
}

.doc ul {
    margin: 0 0 12px 22px;
    color: var(--muted);
}

.doc li {
    margin-bottom: 6px;
}

.doc li::marker {
    color: var(--accent);
}

.doc .note {
    background: var(--surface-2);
    border-radius: 10px;
    padding: 14px 16px;
    margin: 14px 0;
    font-size: 0.95rem;
}

/* ---------- Contact ---------- */
.contact {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    border-radius: 18px;
    padding: clamp(28px, 5vw, 44px);
    text-align: center;
    box-shadow: var(--shadow);
    margin-bottom: 36px;
}

.contact h2 {
    font-size: 1.4rem;
    margin-bottom: 6px;
}

.contact > p {
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 22px;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    max-width: 640px;
    margin: 0 auto;
}

.contact-card {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 12px;
    padding: 14px 16px;
    font-size: 0.95rem;
}

.contact-card .label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 4px;
}

.contact-card a {
    color: #fff;
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.4);
    overflow-wrap: anywhere;
}

.contact-card a:hover {
    border-bottom-color: #fff;
}

/* ---------- Footer ---------- */
.footer {
    text-align: center;
    padding: 8px 16px 48px;
    color: var(--muted);
    font-size: 0.88rem;
}

.footer .privacy-note {
    margin-bottom: 8px;
    opacity: 0.85;
}

/* ---------- Print ---------- */
@media print {
    .topbar,
    .toc,
    .theme-toggle,
    .skip-link,
    .anchor,
    .subnav,
    .copy-btn {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .doc,
    .facts,
    .summary,
    .notice,
    .warn,
    .cta-card,
    .table-wrap,
    .contact {
        box-shadow: none;
        border: 1px solid #ddd;
    }

    .contact,
    .btn-mail {
        background: #fff;
        color: #000;
    }

    .contact > p,
    .contact-card .label,
    .cta-card > p,
    .cta-alt {
        color: #444;
    }

    .contact-card,
    .cta-card {
        background: #fff;
        border-color: #ddd;
    }

    .contact-card a,
    .btn-mail {
        color: #000;
    }

    .doc section {
        break-inside: avoid-page;
    }
}