:root {
    color-scheme: light;
    --bg: #eef2f5;
    --panel: #0e1620;
    --panel-2: #192532;
    --text: #20262d;
    --muted: #5f6c79;
    --line: #cfd8e3;
    --card: #ffffff;
    --accent: #ff6000;
    --accent-2: #ff8f47;
    --brand-navy: #202d3b;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: "Montserrat", "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.45;
    background:
        radial-gradient(circle at 0 0, rgba(255, 96, 0, 0.08), transparent 32%),
        radial-gradient(circle at 95% 100%, rgba(32, 45, 59, 0.12), transparent 28%),
        var(--bg);
    color: var(--text);
}

.layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    min-height: 100vh;
}

.sidebar {
    background:
        linear-gradient(160deg, rgba(255, 96, 0, 0.14), transparent 45%),
        linear-gradient(180deg, var(--panel), var(--panel-2));
    color: #fff;
    border-right: 1px solid #0b1220;
    padding: 20px 16px 22px 16px;
    overflow-y: auto;
}

.brand {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    margin-bottom: 18px;
}

.brand img {
    width: 190px;
    max-width: 100%;
}

.brand-tag {
    margin-top: 8px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: #9fb0c2;
}

.menu {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.menu-group {
    margin-top: 10px;
    margin-bottom: 6px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #84a2bf;
}

.menu a {
    color: #cbd5e1;
    text-decoration: none;
    padding: 8px 10px;
    font-size: 14px;
    border-radius: 8px;
    display: block;
    border: 1px solid transparent;
    line-height: 1.25;
    overflow-wrap: anywhere;
}

.menu a:hover,
.menu a.active {
    background: rgba(255, 96, 0, 0.18);
    border-color: rgba(255, 143, 71, 0.45);
    color: #fff;
}

.main {
    padding: 26px 30px;
}

.header h1 {
    margin: 0 0 6px 0;
    font-size: 30px;
    letter-spacing: -0.015em;
    color: #1a2533;
}

.subtitle {
    color: var(--muted);
    font-size: 13px;
}

.content {
    margin-top: 20px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 18px 20px;
    box-shadow:
        0 10px 22px rgba(17, 24, 39, 0.08),
        0 1px 0 rgba(255, 255, 255, 0.55) inset;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
}

.overview-intro {
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 14px;
    background:
        linear-gradient(180deg, rgba(255, 96, 0, 0.05), transparent 50%),
        linear-gradient(165deg, #ffffff, #f8fbfe);
}

.overview-intro h2 {
    margin: 0 0 8px 0;
    font-size: 22px;
    color: #1a2533;
}

.overview-intro p {
    margin: 0 0 10px 0;
    color: var(--muted);
}

.overview-list {
    margin: 0;
    padding-left: 18px;
    color: #243447;
}

.overview-list li {
    margin: 4px 0;
}

.card {
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 14px 14px 13px 14px;
    background:
        linear-gradient(180deg, rgba(255, 96, 0, 0.07), transparent 35%),
        linear-gradient(165deg, #ffffff, #f8fbfe);
}

.card h3 {
    margin: 0 0 7px 0;
    font-size: 16px;
    color: #1b2736;
}

.card p {
    margin: 0;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.4;
}

.btn-row {
    margin-top: 12px;
    display: flex;
    gap: 8px;
}

.btn {
    display: inline-block;
    font-size: 12px;
    text-decoration: none;
    border: 1px solid var(--line);
    padding: 8px 10px;
    border-radius: 8px;
    color: var(--text);
    background: #fff;
}

.btn-primary {
    border-color: rgba(255, 96, 0, 0.45);
    color: #9a3f06;
    background: linear-gradient(180deg, #fff6f0, #fffaf7);
}

.btn-primary:hover {
    background: linear-gradient(180deg, #ffeadd, #fff6ef);
}

.markdown {
    max-width: none;
    width: 100%;
}

.markdown.markdown-body {
    color: #24292f;
    background: transparent;
    font-family: "Montserrat", "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.55;
}

.markdown.markdown-body h1,
.markdown.markdown-body h2,
.markdown.markdown-body h3,
.markdown.markdown-body h4 {
    color: #1f2937;
    border-bottom: 0;
}

.markdown.markdown-body pre {
    margin: 1em 0;
    padding: 14px;
    border: 1px solid #d0d7de;
    border-radius: 10px;
    background: #f6f8fa;
    color: #1f2328;
    overflow-x: auto;
}

.markdown.markdown-body pre code {
    font-family: "SFMono-Regular", Menlo, Consolas, monospace;
    font-size: 13px;
    line-height: 1.5;
    color: #1f2328 !important;
    background: transparent;
    -webkit-text-fill-color: #1f2328;
    text-shadow: none;
}

.markdown.markdown-body :not(pre) > code {
    padding: 0.15em 0.35em;
    border-radius: 6px;
    background: rgba(175, 184, 193, 0.2);
    color: #24292f;
}

.api-shell {
    min-height: 480px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid #dde6f0;
}

@media (max-width: 980px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        border-right: none;
        border-bottom: 1px solid #0b1220;
    }
}