:root {
    --docs-bg: #f8fafc;
    --docs-bg-accent: #eef4ff;
    --docs-card: rgba(255, 255, 255, 0.88);
    --docs-card-strong: #ffffff;
    --docs-text: #0f172a;
    --docs-muted: #475569;
    --docs-border: rgba(148, 163, 184, 0.28);
    --docs-blue: #2563eb;
    --docs-cyan: #0891b2;
    --docs-green: #0f766e;
    --docs-warm: #c2410c;
    --docs-shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
    --docs-radius-xl: 28px;
    --docs-radius-lg: 20px;
    --docs-radius-md: 14px;
    --docs-max: 1120px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body.docs-page {
    margin: 0;
    min-height: 100vh;
    color: var(--docs-text);
    font-family: "Pretendard", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.16), transparent 28%),
        radial-gradient(circle at top right, rgba(8, 145, 178, 0.10), transparent 24%),
        linear-gradient(180deg, var(--docs-bg) 0%, var(--docs-bg-accent) 100%);
}

.docs-shell {
    width: min(calc(100% - 32px), var(--docs-max));
    margin: 0 auto;
}

.docs-topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    backdrop-filter: blur(14px);
    background: rgba(248, 250, 252, 0.78);
    border-bottom: 1px solid rgba(226, 232, 240, 0.78);
}

.docs-topbar-inner {
    width: min(calc(100% - 32px), var(--docs-max));
    min-height: 68px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.docs-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--docs-text);
    text-decoration: none;
    font-weight: 900;
    letter-spacing: -0.02em;
}

.docs-brand-mark {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: linear-gradient(135deg, #dbeafe, #ecfeff);
    box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.12);
}

.docs-brand-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.docs-brand-text small {
    color: var(--docs-muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.docs-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

.docs-nav a {
    padding: 10px 14px;
    border-radius: 999px;
    color: var(--docs-muted);
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    transition: background-color 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.docs-nav a:hover,
.docs-nav a.is-active {
    background: rgba(37, 99, 235, 0.1);
    color: var(--docs-blue);
    transform: translateY(-1px);
}

.docs-main {
    padding: 32px 0 72px;
}

.docs-hero {
    position: relative;
    overflow: hidden;
    padding: 32px;
    border: 1px solid var(--docs-border);
    border-radius: var(--docs-radius-xl);
    background:
        linear-gradient(135deg, rgba(255,255,255,0.96), rgba(255,255,255,0.82)),
        radial-gradient(circle at top right, rgba(59, 130, 246, 0.18), transparent 35%);
    box-shadow: var(--docs-shadow);
}

.docs-hero::after {
    content: "";
    position: absolute;
    right: -64px;
    bottom: -72px;
    width: 240px;
    height: 240px;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.12), transparent 68%);
    pointer-events: none;
}

.docs-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 34px;
    padding: 0 12px;
    border-radius: 999px;
    background: #eff6ff;
    color: var(--docs-blue);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.docs-hero h1 {
    margin: 18px 0 14px;
    font-size: clamp(32px, 4.8vw, 54px);
    line-height: 1.06;
    letter-spacing: -0.05em;
}

.docs-hero p {
    max-width: 780px;
    margin: 0;
    color: var(--docs-muted);
    font-size: 17px;
    line-height: 1.85;
}

.docs-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.docs-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 18px;
    border-radius: 999px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 800;
    transition: transform 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease;
}

.docs-button:hover {
    transform: translateY(-1px);
}

.docs-button.primary {
    color: #ffffff;
    background: linear-gradient(135deg, var(--docs-green), var(--docs-cyan));
    box-shadow: 0 18px 36px rgba(8, 145, 178, 0.20);
}

.docs-button.secondary {
    color: var(--docs-text);
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid #dbe4f0;
}

.docs-grid {
    display: grid;
    gap: 18px;
    margin-top: 24px;
}

.docs-grid.two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.docs-grid.three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.docs-card {
    padding: 22px;
    border: 1px solid var(--docs-border);
    border-radius: var(--docs-radius-lg);
    background: var(--docs-card);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.04);
    backdrop-filter: blur(10px);
}

.docs-card.strong {
    background: var(--docs-card-strong);
}

.docs-card h2,
.docs-card h3 {
    margin: 0 0 12px;
    letter-spacing: -0.03em;
}

.docs-card h2 {
    font-size: 24px;
}

.docs-card h3 {
    font-size: 18px;
}

.docs-card p,
.docs-card li {
    color: var(--docs-muted);
    font-size: 14px;
    line-height: 1.8;
}

.docs-card ul {
    margin: 0;
    padding-left: 18px;
}

.docs-card ol {
    margin: 0;
    padding-left: 18px;
}

.docs-card .eyebrow {
    margin-bottom: 10px;
    color: var(--docs-warm);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.docs-section {
    margin-top: 26px;
}

.docs-section-title {
    margin: 0 0 14px;
    font-size: 28px;
    letter-spacing: -0.04em;
}

.docs-note {
    padding: 16px 18px;
    border-radius: var(--docs-radius-md);
    background: #fff7ed;
    border: 1px solid #fed7aa;
    color: #9a3412;
    font-size: 14px;
    line-height: 1.75;
}

.docs-warning {
    padding: 18px 20px;
    border-radius: var(--docs-radius-md);
    background: #fff1f2;
    border: 1px solid #fecdd3;
    color: #9f1239;
    font-size: 14px;
    line-height: 1.75;
}

.docs-table {
    width: 100%;
    border-collapse: collapse;
}

.docs-table th,
.docs-table td {
    padding: 14px 12px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
    font-size: 14px;
    line-height: 1.7;
}

.docs-table th {
    color: var(--docs-text);
    font-weight: 800;
}

.docs-table td {
    color: var(--docs-muted);
}

.docs-footer {
    margin-top: 26px;
    color: #64748b;
    font-size: 13px;
    line-height: 1.75;
}

@media (max-width: 960px) {
    .docs-grid.two,
    .docs-grid.three {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .docs-topbar {
        position: static;
    }

    .docs-topbar-inner {
        padding: 12px 0;
        align-items: flex-start;
        flex-direction: column;
    }

    .docs-nav {
        justify-content: flex-start;
    }

    .docs-main {
        padding-top: 20px;
    }

    .docs-hero {
        padding: 24px;
    }
}