:root {
    --bg: #07111f;
    --bg-glow: #13233d;
    --surface: #0d1729;
    --surface-2: #13233d;
    --text: #f5f7ff;
    --muted: #8ea2c6;
    --accent: #5eead4;
    --accent-2: #7c93ff;
    --border: rgba(255, 255, 255, 0.08);
    --topbar-bg: rgba(7, 17, 31, 0.76);
    --surface-soft: rgba(255, 255, 255, 0.04);
    --surface-card-start: rgba(255, 255, 255, 0.06);
    --surface-card-end: rgba(255, 255, 255, 0.03);
    --button-ghost-bg: rgba(255, 255, 255, 0.04);
    --button-ghost-hover: rgba(255, 255, 255, 0.05);
    --nav-hover-bg: rgba(94, 234, 212, 0.12);
    --nav-hover-border: rgba(94, 234, 212, 0.25);
    --avatar-border: rgba(94, 234, 212, 0.38);
    --external-border: rgba(124, 147, 255, 0.35);
    --external-bg: rgba(124, 147, 255, 0.14);
    --external-text: #c7d4ff;
    --external-hover-bg: rgba(124, 147, 255, 0.2);
    --external-hover-text: #eef2ff;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.28);
    --card-wave-a: rgba(94, 234, 212, 0.16);
    --card-wave-b: rgba(124, 147, 255, 0.12);
    --sidebar-bg: linear-gradient(180deg, rgba(13, 23, 41, 0.96), rgba(13, 23, 41, 0.9));
}

html[data-theme="light"] {
    --bg: #f4f7fb;
    --bg-glow: #dce9ff;
    --surface: #ffffff;
    --surface-2: #edf3ff;
    --text: #122033;
    --muted: #596b86;
    --accent: #0f766e;
    --accent-2: #2563eb;
    --border: rgba(18, 32, 51, 0.12);
    --topbar-bg: rgba(244, 247, 251, 0.82);
    --surface-soft: rgba(255, 255, 255, 0.78);
    --surface-card-start: rgba(255, 255, 255, 0.96);
    --surface-card-end: rgba(237, 243, 255, 0.88);
    --button-ghost-bg: rgba(18, 32, 51, 0.04);
    --button-ghost-hover: rgba(18, 32, 51, 0.07);
    --nav-hover-bg: rgba(15, 118, 110, 0.1);
    --nav-hover-border: rgba(15, 118, 110, 0.22);
    --avatar-border: rgba(15, 118, 110, 0.28);
    --external-border: rgba(37, 99, 235, 0.24);
    --external-bg: rgba(37, 99, 235, 0.08);
    --external-text: #1d4ed8;
    --external-hover-bg: rgba(37, 99, 235, 0.12);
    --external-hover-text: #1e3a8a;
    --shadow: 0 18px 50px rgba(15, 23, 42, 0.12);
    --card-wave-a: rgba(15, 118, 110, 0.14);
    --card-wave-b: rgba(37, 99, 235, 0.11);
    --sidebar-bg: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(244, 247, 251, 0.92));
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Inter, "Segoe UI", Roboto, sans-serif;
    background: radial-gradient(circle at top left, var(--bg-glow), var(--bg) 55%);
    color: var(--text);
    line-height: 1.6;
    position: relative;
    isolation: isolate;
    transition: background 180ms ease, color 180ms ease;
}

body > *:not(.site-ambient-canvas) {
    position: relative;
    z-index: 1;
}

.site-ambient-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    pointer-events: none;
    z-index: -1;
    opacity: 0.17;
}

html[data-theme="light"] .site-ambient-canvas {
    opacity: 0.28;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(1200px, calc(100% - 2rem));
    margin: 0 auto;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(16px);
    background: var(--topbar-bg);
    border-bottom: 1px solid var(--border);
    transition: background 180ms ease, border-color 180ms ease;
}

.topbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 0;
}

.topbar-panel {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    margin-left: auto;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
}

.brand-avatar {
    width: 34px;
    height: 34px;
    border-radius: 999px;
    object-fit: cover;
    border: 1px solid var(--avatar-border);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
}

.nav {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    color: var(--muted);
}

.theme-toggle,
.nav-toggle {
    height: 42px;
    border-radius: 0.7rem;
    border: 1px solid var(--border);
    background: var(--button-ghost-bg);
    color: var(--text);
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.theme-toggle:hover,
.nav-toggle:hover {
    background: var(--button-ghost-hover);
}

.theme-toggle {
    display: inline-flex;
    width: 36px;
    min-width: 36px;
    height: 36px;
    padding: 0;
    font: inherit;
    font-weight: 600;
    border-radius: 999px;
}

.theme-toggle-label {
    line-height: 1;
    font-size: 0.95rem;
}

.nav-toggle {
    display: none;
    width: 42px;
    flex-direction: column;
    gap: 0.28rem;
}

.nav-toggle-line {
    width: 16px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
}

.nav a {
    padding: 0.45rem 0.7rem;
    border-radius: 999px;
    border: 1px solid transparent;
    transition: all 160ms ease;
}

.nav a:hover,
.nav a.active {
    color: var(--text);
    background: var(--nav-hover-bg);
    border-color: var(--nav-hover-border);
}

.docs-shell {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    align-items: stretch;
    gap: 1rem;
    width: min(1400px, calc(100% - 2rem));
    margin: 1.2rem auto 3rem;
}

.sidebar {
    display: flex;
    flex-direction: column;
    align-self: stretch;
    background: var(--sidebar-bg);
    border: 1px solid var(--border);
    border-radius: 1.1rem;
    padding: 1rem;
    height: auto;
    min-height: calc(100vh - 140px);
    position: sticky;
    top: 88px;
}

.sidebar-title {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: 0.9rem;
    font-weight: 700;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-bottom: 1rem;
}

.sidebar-menu-link {
    border: 1px solid transparent;
    background: transparent;
    color: var(--muted);
    text-align: left;
    padding: 0.7rem 0.8rem;
    border-radius: 0.8rem;
    transition: all 160ms ease;
}

.sidebar-menu-link:hover {
    background: var(--button-ghost-hover);
    color: var(--text);
}

.sidebar-menu-link.active {
    background: var(--nav-hover-bg);
    border-color: var(--nav-hover-border);
    color: var(--text);
}

.sidebar-dropdown {
    margin-bottom: 1rem;
    border: 1px solid var(--border);
    border-radius: 0.9rem;
    background: var(--surface-card-end);
    padding: 0.55rem 0.65rem;
}

.sidebar-dropdown summary {
    cursor: pointer;
    color: var(--text);
    font-weight: 600;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-dropdown summary::-webkit-details-marker {
    display: none;
}

.sidebar-dropdown summary::after {
    content: "▸";
    color: var(--muted);
    transform: rotate(0deg);
    transition: transform 160ms ease;
}

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

.sidebar-card {
    padding: 0.9rem;
    border-radius: 0.9rem;
    background: linear-gradient(145deg, var(--surface-card-start), var(--surface-card-end));
    border: 1px solid var(--border);
}

.sidebar-card h3 {
    margin: 0 0 0.35rem;
    font-size: 1rem;
}

.sidebar-card p {
    margin: 0;
    color: var(--muted);
    font-size: 0.95rem;
}

.sidebar-links-stack {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    margin-top: 0.6rem;
}

.sidebar-links-stack a {
    color: var(--muted);
    font-size: 0.95rem;
    transition: color 160ms ease;
}

.sidebar-links-stack a:hover,
.sidebar-links-stack a.active {
    color: var(--text);
}

.sidebar-project-links a.active {
    background: var(--nav-hover-bg);
    border: 1px solid var(--nav-hover-border);
    border-radius: 0.65rem;
    padding: 0.45rem 0.55rem;
}

.sidebar-project-links {
    max-height: 240px;
    overflow: auto;
    padding-right: 0.2rem;
}

.sidebar-spacer {
    flex: 1;
}

.sidebar-external {
    margin-top: 0.8rem;
    border: 1px solid var(--external-border);
    background: var(--external-bg);
    color: var(--external-text);
    padding: 0.6rem 0.75rem;
    border-radius: 0.75rem;
    font-weight: 600;
    text-align: center;
}

.sidebar-external:hover {
    color: var(--external-hover-text);
    background: var(--external-hover-bg);
}

.content {
    min-width: 0;
}

main {
    padding: 0 0 4rem;
}

.docs-shell .content > main {
    padding: 0;
}

.docs-shell .content > main.container {
    width: 100%;
    margin: 0;
}

.card {
    background: linear-gradient(145deg, var(--surface-card-start), var(--surface-card-end));
    border: 1px solid var(--border);
    border-radius: 1.2rem;
    padding: 1.4rem;
    box-shadow: var(--shadow);
}

.card,
.docs-hero,
.panel,
.hero-card,
.content-card,
.metric-card,
.extranet-option-card,
.sidebar-card,
.faq-item,
.info-item {
    position: relative;
    overflow: hidden;
}

.card-ambient-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    pointer-events: none;
    z-index: 0;
    opacity: 0.64;
}

html[data-theme="light"] .card-ambient-canvas {
    opacity: 0.50;
}

.card-ambient-canvas {
    position: absolute !important;
}

.card > *:not(.card-ambient-canvas),
.docs-hero > *:not(.card-ambient-canvas),
.panel > *:not(.card-ambient-canvas),
.hero-card > *:not(.card-ambient-canvas),
.content-card > *:not(.card-ambient-canvas),
.metric-card > *:not(.card-ambient-canvas),
.extranet-option-card > *:not(.card-ambient-canvas),
.sidebar-card > *:not(.card-ambient-canvas),
.faq-item > *:not(.card-ambient-canvas),
.info-item > *:not(.card-ambient-canvas) {
    position: relative;
    z-index: 1;
}

.card > .card-ambient-canvas,
.docs-hero > .card-ambient-canvas,
.panel > .card-ambient-canvas,
.hero-card > .card-ambient-canvas,
.content-card > .card-ambient-canvas,
.metric-card > .card-ambient-canvas,
.extranet-option-card > .card-ambient-canvas,
.sidebar-card > .card-ambient-canvas,
.faq-item > .card-ambient-canvas,
.info-item > .card-ambient-canvas {
    z-index: 0;
}

.btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    padding: 0.8rem 1rem;
    border-radius: 999px;
    font-weight: 600;
    border: 0;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    color: #04111d;
}

.btn-secondary {
    border: 1px solid var(--border);
    background: var(--button-ghost-bg);
    color: var(--text);
}

.back-to-top {
    position: fixed;
    right: 1.1rem;
    bottom: 1.1rem;
    z-index: 20;
    border: 1px solid var(--nav-hover-border);
    background: var(--topbar-bg);
    color: var(--text);
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1;
    width: 2.8rem;
    height: 2.8rem;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease;
    cursor: pointer;
}

html[data-theme="light"] .back-to-top {
    background: rgba(15, 23, 42, 0.9);
    border-color: rgba(148, 163, 184, 0.42);
    color: #f8fbff;
}

.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

@media (max-width: 640px) {
    .docs-shell {
        grid-template-columns: 1fr;
    }

    .topbar .container {
        flex-wrap: wrap;
        gap: 0.7rem;
    }

    .topbar-panel {
        width: 100%;
        justify-content: flex-end;
        flex-wrap: wrap;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .nav {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0.35rem;
        padding-top: 0.3rem;
        flex-wrap: nowrap;
    }

    .nav.is-open {
        display: flex;
    }

    .nav a {
        border-radius: 0.7rem;
        padding: 0.6rem 0.75rem;
    }

    .sidebar {
        position: static;
        height: auto;
        overflow: visible;
    }

    .back-to-top {
        right: 0.85rem;
        bottom: 0.85rem;
    }
}