/* ── Design tokens ───────────────────────────────────────────────────── */
:root {
    --accent:        #6366f1;
    --accent-hover:  #4f46e5;
    --accent-soft:   rgba(99,102,241,.1);
    --accent2:       #38bdf8;
    --surface:       #ffffff;
    --surface-2:     #f8fafc;
    --surface-3:     #f1f5f9;
    --border:        #e2e8f0;
    --border-strong: #cbd5e1;
    --text-1:        #0f172a;
    --text-2:        #475569;
    --text-3:        #94a3b8;
    --code-bg:       #1a1b27;
    --sidebar-w:     256px;
    --toc-w:         200px;
    --navbar-h:      56px;
    --bar-h:         3px;
    --r:             8px;
}

/* ── Reset ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-1);
    background: var(--surface);
    -webkit-font-smoothing: antialiased;
}

/* ── Gradient bar ────────────────────────────────────────────────────── */
.gradient-bar {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--bar-h);
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    z-index: 200;
}

/* ── Navbar ──────────────────────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: var(--bar-h);
    left: 0; right: 0;
    height: var(--navbar-h);
    background: rgba(255,255,255,.9);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    z-index: 100;
}

.navbar-left, .navbar-right { display: flex; align-items: center; gap: .5rem; }

.logo-link { display: flex; align-items: center; }
.logo-link img { display: block; }

.divider-v {
    width: 1px;
    height: 20px;
    background: var(--border-strong);
    margin: 0 .25rem;
}

/* Icon buttons */
.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px; height: 34px;
    border-radius: 7px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-2);
    cursor: pointer;
    text-decoration: none;
    transition: background .15s, border-color .15s, color .15s;
}
.icon-btn:hover {
    background: var(--surface-2);
    border-color: var(--border-strong);
    color: var(--text-1);
}

/* ── Version dropdown ────────────────────────────────────────────────── */
.version-dropdown { position: relative; }

.version-chip {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-size: .73rem;
    font-weight: 600;
    letter-spacing: .03em;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid rgba(99,102,241,.2);
    padding: .2rem .55rem;
    border-radius: 99px;
    cursor: pointer;
    transition: background .15s, border-color .15s;
}
.version-chip:hover { background: rgba(99,102,241,.16); border-color: rgba(99,102,241,.35); }

.version-menu {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 6px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r);
    box-shadow: 0 8px 24px rgba(0,0,0,.1);
    min-width: 110px;
    list-style: none;
    overflow: hidden;
    z-index: 200;
}
.version-menu.is-open { display: block; }

.version-option {
    display: block;
    padding: .45rem .9rem;
    font-size: .8rem;
    font-weight: 500;
    color: var(--text-2);
    text-decoration: none;
    transition: background .12s, color .12s;
}
.version-option:hover { background: var(--surface-2); color: var(--text-1); }
.version-option.is-current {
    color: var(--accent);
    background: var(--accent-soft);
    font-weight: 600;
}

/* ── App shell ───────────────────────────────────────────────────────── */
.app-shell {
    display: flex;
    padding-top: calc(var(--bar-h) + var(--navbar-h));
    min-height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────────────────────── */
.sidebar {
    position: fixed;
    top:    calc(var(--bar-h) + var(--navbar-h));
    left:   0; bottom: 0;
    width:  var(--sidebar-w);
    background: var(--surface-2);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 1rem .625rem 3rem;
    transition: transform .22s cubic-bezier(.4,0,.2,1);
    z-index: 90;
}
.sidebar.is-hidden { transform: translateX(-100%); }

.sidebar::-webkit-scrollbar { width: 3px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 2px; }

/* Nav groups */
.nav-group { margin-bottom: 1.5rem; }

.nav-group-label {
    font-size: .65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .11em;
    color: var(--text-3);
    padding: 0 .625rem .4rem;
}

.nav-group ul { list-style: none; }

.nav-item {
    display: block;
    padding: .375rem .625rem;
    border-radius: 6px;
    font-size: .865rem;
    color: var(--text-2);
    text-decoration: none;
    font-weight: 450;
    transition: background .12s, color .12s;
    line-height: 1.45;
}
.nav-item:hover  { background: var(--surface-3); color: var(--text-1); }
.nav-item.is-active {
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 600;
}

/* ── Content area ────────────────────────────────────────────────────── */
.content-area {
    margin-left: var(--sidebar-w);
    margin-right: 0;
    flex: 1;
    min-width: 0;
    padding: 3rem clamp(1.25rem, 6vw, 4rem) 7rem;
    transition: margin-left .22s cubic-bezier(.4,0,.2,1), margin-right .22s cubic-bezier(.4,0,.2,1);
}
.content-area.is-wide  { margin-left: 0; }
.content-area.has-toc  { margin-right: calc(var(--toc-w) + 1.5rem); }

/* ── Prose ───────────────────────────────────────────────────────────── */
.prose { max-width: 800px; }

/* Title */
.prose h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -.025em;
    line-height: 1.2;
    color: var(--text-1);
    margin-bottom: .5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

/* Section headings */
.prose h2 {
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: -.01em;
    color: var(--text-1);
    margin-top: 2.75rem;
    margin-bottom: .875rem;
    scroll-margin-top: calc(var(--bar-h) + var(--navbar-h) + 1.5rem);
}
.prose h2::before {
    content: '';
    display: inline-block;
    width: 3px;
    height: .9em;
    background: var(--accent);
    border-radius: 2px;
    margin-right: .6rem;
    vertical-align: middle;
    position: relative;
    top: -1px;
}

/* Label-style section tags (### Endpoint, ### Params, ### Response) */
.prose h3 {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid rgba(99,102,241,.18);
    padding: .22rem .65rem;
    border-radius: 99px;
    margin-top: 1.875rem;
    margin-bottom: .625rem;
}

/* Body text */
.prose p       { color: var(--text-2); margin-bottom: .875rem; }
.prose a       { color: var(--accent); text-decoration: none; font-weight: 500; }
.prose a:hover { text-decoration: underline; }
.prose hr      { border: none; border-top: 1px solid var(--border); margin: 2rem 0; }

/* Lists */
.prose ul {
    padding-left: 1.25rem;
    margin-bottom: .875rem;
    color: var(--text-2);
}
.prose ul li { margin-bottom: .3rem; }
.prose ul li a { color: var(--accent); font-weight: 500; }

/* Inline code */
.prose :not(pre) > code {
    font-family: 'JetBrains Mono', monospace;
    font-size: .82em;
    background: var(--surface-3);
    border: 1px solid var(--border);
    color: #c0392b;
    padding: .1em .4em;
    border-radius: 4px;
}

/* ── Code blocks ─────────────────────────────────────────────────────── */
.prose pre {
    position: relative;
    background: var(--code-bg);
    border-radius: var(--r);
    margin: 1rem 0;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0,0,0,.12), 0 1px 4px rgba(0,0,0,.08);
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .5rem .875rem;
    border-bottom: 1px solid rgba(255,255,255,.06);
    background: rgba(255,255,255,.03);
    gap: .5rem;
}

.code-header-left { display: flex; align-items: center; gap: .5rem; }

/* HTTP method badges */
.method-badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: .72rem;
    font-weight: 700;
    padding: .18rem .5rem;
    border-radius: 5px;
    letter-spacing: .04em;
    flex-shrink: 0;
}
.method-get    { background: rgba(52,211,153,.18); color: #10b981; }
.method-post   { background: rgba(96,165,250,.18); color: #60a5fa; }
.method-put    { background: rgba(251,191,36,.18);  color: #fbbf24; }
.method-delete { background: rgba(248,113,113,.18); color: #f87171; }
.method-patch  { background: rgba(167,139,250,.18); color: #a78bfa; }
.method-head   { background: rgba(156,163,175,.18); color: #9ca3af; }

.lang-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: .7rem;
    color: rgba(255,255,255,.3);
    letter-spacing: .05em;
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    font-family: 'Inter', sans-serif;
    font-size: .71rem;
    font-weight: 500;
    color: rgba(255,255,255,.35);
    background: transparent;
    border: 1px solid rgba(255,255,255,.1);
    border-radius: 5px;
    padding: .22rem .55rem;
    cursor: pointer;
    transition: color .15s, border-color .15s, background .15s;
    white-space: nowrap;
    flex-shrink: 0;
}
.copy-btn:hover {
    color: rgba(255,255,255,.8);
    border-color: rgba(255,255,255,.25);
    background: rgba(255,255,255,.05);
}
.copy-btn.copied {
    color: #10b981;
    border-color: rgba(16,185,129,.3);
}

.prose pre code.hljs {
    display: block;
    padding: 1rem 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: .82rem;
    line-height: 1.75;
    overflow-x: auto;
    background: transparent;
}

/* ── Tables ──────────────────────────────────────────────────────────── */
.prose table {
    width: 100%;
    border-collapse: collapse;
    margin: .875rem 0 1.25rem;
    font-size: .875rem;
    border: 1px solid var(--border);
    border-radius: var(--r);
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,.05);
}

.prose thead tr { background: var(--surface-3); }

.prose th {
    padding: .6rem 1rem;
    text-align: left;
    font-size: .78rem;
    font-weight: 600;
    color: var(--text-1);
    letter-spacing: .01em;
    border-bottom: 1.5px solid var(--border);
    white-space: nowrap;
}

.prose td {
    padding: .6rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-2);
    vertical-align: top;
    line-height: 1.55;
}
.prose tr:last-child td  { border-bottom: none; }
.prose tbody tr:hover td { background: var(--surface-2); }

/* ── Images ──────────────────────────────────────────────────────────── */
.prose img {
    max-width: 100%;
    border-radius: var(--r);
    border: 1px solid var(--border);
    margin: 1.25rem 0;
    box-shadow: 0 4px 16px rgba(0,0,0,.08);
}

/* ── Anchor offset ───────────────────────────────────────────────────── */
.prose [id] { scroll-margin-top: calc(var(--bar-h) + var(--navbar-h) + 1.5rem); }

/* ── 404 ─────────────────────────────────────────────────────────────── */
.not-found {
    text-align: center;
    padding: 7rem 2rem;
}
.not-found h1 {
    font-size: 7rem;
    font-weight: 800;
    letter-spacing: -.06em;
    line-height: 1;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    border: none;
    margin-bottom: 1.25rem;
}
.not-found p { font-size: 1rem; color: var(--text-2); margin-bottom: 2rem; }
.not-found a {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .6rem 1.25rem;
    background: var(--accent);
    color: #fff;
    border-radius: 8px;
    font-weight: 600;
    font-size: .875rem;
    text-decoration: none;
    transition: background .15s;
}
.not-found a:hover { background: var(--accent-hover); text-decoration: none; }

/* ── Right TOC ───────────────────────────────────────────────────────── */
.page-toc {
    display: none;
    position: fixed;
    top:   calc(var(--bar-h) + var(--navbar-h) + 2.5rem);
    right: 0;
    width: var(--toc-w);
    padding: 0 1.25rem 0 0;
    max-height: calc(100vh - var(--bar-h) - var(--navbar-h) - 5rem);
    overflow-y: auto;
    z-index: 50;
}
.page-toc.is-visible { display: block; }

.page-toc::-webkit-scrollbar { width: 3px; }
.page-toc::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.toc-heading {
    font-size: .65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--text-3);
    margin-bottom: .625rem;
    padding-bottom: .5rem;
    border-bottom: 1px solid var(--border);
}

.toc-link {
    display: block;
    font-size: .82rem;
    color: var(--text-3);
    text-decoration: none;
    padding: .28rem 0;
    border-left: 2px solid transparent;
    padding-left: .625rem;
    line-height: 1.4;
    transition: color .15s, border-color .15s;
    word-break: break-word;
}
.toc-link:hover    { color: var(--text-2); }
.toc-link.is-active {
    color: var(--accent);
    border-left-color: var(--accent);
    font-weight: 500;
}

/* ── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 1280px) {
    .page-toc { display: none !important; }
    .content-area.has-toc { margin-right: 0; }
}

@media (max-width: 900px) {
    .sidebar { box-shadow: 4px 0 20px rgba(0,0,0,.08); }
    .content-area { margin-left: 0; padding: 2rem 1.25rem 5rem; }
}

@media (max-width: 520px) {
    .prose h1 { font-size: 1.4rem; }
    .prose h2 { font-size: 1.1rem; }
    .prose table { font-size: .8rem; }
    .prose th, .prose td { padding: .5rem .625rem; }
}