:root {
    --bg: oklch(0.15 0.014 286);
    --bg-raised: oklch(0.18 0.015 286);
    --bg-card: oklch(0.16 0.014 286);
    --bg-sunken: oklch(0.12 0.014 286);
    --border: oklch(0.3 0.02 286 / 0.4);
    --border-strong: oklch(0.4 0.03 286 / 0.6);
    --text: oklch(0.93 0.008 286);
    --text-muted: oklch(0.72 0.01 286);
    --text-dim: oklch(0.55 0.01 286);
    --accent: oklch(0.72 0.15 286);
    --accent-strong: oklch(0.78 0.15 286);
    --accent-contrast: oklch(0.15 0.02 286);
    --danger: oklch(0.7 0.16 25);
    --danger-bg: oklch(0.25 0.06 25 / 0.35);
    --danger-border: oklch(0.5 0.15 25 / 0.5);
    --font-sans: 'IBM Plex Sans', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
}

a { color: var(--accent-strong); text-decoration: none; }
a:hover { color: oklch(0.85 0.16 286); text-decoration: underline; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* Nav */
.site-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 26px; height: 26px; display: block; }
.brand-name { font-family: var(--font-mono); font-size: 18px; font-weight: 600; color: var(--text); }
.brand-name .accent { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 14px; font-family: var(--font-mono); }
.nav-links a:not(.btn) { color: var(--text-muted); }
.nav-links a:not(.btn):hover { color: var(--text); }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 24px; border-radius: 4px; font-weight: 600; font-size: 14.5px;
    font-family: var(--font-sans); border: 1px solid transparent; cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover { background: var(--accent-strong); }
.btn-outline { border-color: var(--border-strong); color: var(--text); background: transparent; }
.btn-outline:hover { background: oklch(1 0 0 / 0.05); }
.btn-sm { padding: 8px 16px; font-size: 13px; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* Cards / grid */
.card { background: var(--bg-raised); border: 1px solid var(--border); border-radius: 8px; }
.card-pad { padding: 32px; }
.grid { display: grid; gap: 20px; }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) {
    .grid-cols-3, .grid-cols-2 { grid-template-columns: 1fr; }
}
.tile-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
@media (max-width: 860px) {
    .tile-grid { grid-template-columns: 1fr; }
}
.tile { background: var(--bg-card); padding: 28px; display: flex; flex-direction: column; gap: 14px; }
.tile-icon { width: 38px; height: 38px; border: 1px solid var(--border-strong); border-radius: 4px; display: flex; align-items: center; justify-content: center; }

/* Section header */
.section-header {
    display: flex; align-items: baseline; justify-content: space-between;
    margin-bottom: 32px; border-bottom: 1px solid var(--border); padding-bottom: 16px;
}
.section-header h2 { font-size: 26px; font-weight: 700; margin: 0; letter-spacing: -0.01em; }
.section-header .meta { font-family: var(--font-mono); font-size: 13px; color: var(--text-dim); }
.section { padding: 8px 0 56px; }

/* Code window */
.code-window { background: var(--bg-raised); border: 1px solid var(--border-strong); border-radius: 8px; overflow: hidden; }
.code-window-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--bg-sunken); }
.code-dot { width: 10px; height: 10px; border-radius: 50%; background: oklch(0.55 0.02 286); }
.code-window-title { font-family: var(--font-mono); font-size: 12.5px; color: var(--text-dim); margin-left: 8px; }
.code-window-body { padding: 24px; font-family: var(--font-mono); font-size: 13.5px; line-height: 1.75; }
.tok-kw { color: oklch(0.65 0.12 300); }
.tok-str { color: oklch(0.72 0.14 286); }
.tok-num { color: oklch(0.75 0.15 60); }
.tok-type { color: oklch(0.85 0.008 286); }
.tok-com { color: oklch(0.55 0.02 286); }
.tok-prompt { color: var(--accent); }

/* Pill */
.pill {
    display: inline-flex; align-items: center; gap: 8px;
    font-family: var(--font-mono); font-size: 12.5px; color: var(--accent);
    border: 1px solid var(--border-strong); padding: 6px 12px; border-radius: 20px;
}
.pill-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); }

/* Forms */
.field { margin-bottom: 20px; }
.label { display: block; font-size: 14px; font-weight: 500; color: var(--text-muted); margin-bottom: 6px; }
.input, select.input {
    width: 100%; padding: 10px 14px; border: 1px solid var(--border-strong); border-radius: 6px;
    background: var(--bg-sunken); color: var(--text); font-family: var(--font-sans); font-size: 14px;
}
.input:focus { outline: none; border-color: var(--accent); }
.hint { font-size: 12.5px; color: var(--text-dim); margin-top: 4px; }
.alert-error { padding: 12px 14px; font-size: 13.5px; border-radius: 6px; background: var(--danger-bg); border: 1px solid var(--danger-border); color: var(--danger); }
.hidden { display: none !important; }

/* Badge */
.badge {
    display: inline-flex; align-items: center; gap: 6px;
    font-family: var(--font-mono); font-size: 11.5px; font-weight: 600;
    padding: 4px 10px; border-radius: 12px; text-transform: uppercase; letter-spacing: 0.03em;
    border: 1px solid var(--border-strong);
}
.badge-free { color: var(--accent); }
.badge-locked { color: var(--text-dim); }

/* Tool panel */
.tool-panel { display: flex; flex-direction: column; gap: 16px; }
.tool-panel .btn { align-self: flex-start; margin-top: auto; }

.tool-row { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 28px 32px; display: flex; align-items: center; gap: 24px; }
.tool-icon-box { width: 64px; height: 64px; flex-shrink: 0; border: 1px solid var(--border-strong); border-radius: 8px; display: flex; align-items: center; justify-content: center; background: var(--bg-sunken); }
.tool-endpoints { display: flex; flex-wrap: wrap; gap: 8px 20px; font-family: var(--font-mono); font-size: 12.5px; color: var(--text-dim); }
.method-get { color: var(--accent); font-weight: 600; }
.method-post { color: var(--danger); font-weight: 600; }

/* API reference table */
.api-table { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.api-table-row {
    display: grid; grid-template-columns: 70px 1fr 2fr; gap: 16px;
    padding: 16px 24px; align-items: center; border-bottom: 1px solid var(--border);
    font-family: var(--font-mono); font-size: 13px;
}
.api-table-row:last-child { border-bottom: none; }
.api-table-row.head {
    padding: 14px 24px; font-size: 12px; color: var(--text-dim);
    text-transform: uppercase; letter-spacing: 0.03em;
}
.api-desc { font-family: var(--font-sans); font-size: 13.5px; color: var(--text-muted); }
@media (max-width: 700px) {
    .tool-row { flex-wrap: wrap; }
    .api-table-row { grid-template-columns: 56px 1fr; }
    .api-table-row span:nth-child(3) { grid-column: 1 / -1; }
}

/* Icon button (circular) */
.icon-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--border-strong);
    background: transparent; color: var(--text); cursor: pointer; font-size: 16px;
}
.icon-btn:hover { background: oklch(1 0 0 / 0.05); }

/* Spinner */
.spinner { width: 22px; height: 22px; border: 2.5px solid var(--border-strong); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Footer */
.site-footer {
    border-top: 1px solid var(--border); padding: 32px 24px;
    display: flex; align-items: center; justify-content: space-between;
    font-family: var(--font-mono); font-size: 13px; color: var(--text-dim);
    max-width: 1120px; margin: 0 auto;
}

/* Hero */
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }
.hero-canvas-wrap {
    position: absolute; top: -40px; right: -80px; bottom: -40px; left: 55%;
    overflow: hidden; z-index: 0; pointer-events: none;
    mask-image: linear-gradient(to bottom, transparent, black 15%, black 85%, transparent);
}
.stat-row { display: flex; gap: 32px; font-family: var(--font-mono); font-size: 13px; color: var(--text-dim); }
.stat-row strong { display: block; color: var(--text); font-weight: 600; }
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
.cursor-blink {
    display: inline-block; width: 8px; height: 16px; background: var(--accent);
    margin-left: 2px; vertical-align: middle; animation: blink 1s step-end infinite;
}

/* Quickstart */
.quickstart-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: center; }

/* Workspace */
.workspace-layout { display: flex; align-items: flex-start; gap: 32px; }
.workspace-sidebar { width: 200px; flex-shrink: 0; }
.workspace-nav { display: flex; flex-direction: column; gap: 4px; }
.workspace-nav a { display: block; padding: 10px 14px; border-radius: 6px; font-size: 14.5px; color: var(--text-muted); }
.workspace-nav a:hover { background: oklch(1 0 0 / 0.05); color: var(--text); text-decoration: none; }
.workspace-nav a.active { background: var(--bg-card); color: var(--text); font-weight: 600; border: 1px solid var(--border); }
.workspace-content { flex-grow: 1; min-width: 0; }
@media (max-width: 760px) {
    .workspace-layout { flex-direction: column; }
    .workspace-sidebar { width: 100%; }
    .workspace-nav { flex-direction: row; flex-wrap: wrap; }
}

/* Document list rows */
.doc-row {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px; background: var(--bg-raised); border: 1px solid var(--border); border-radius: 8px;
}
.doc-row + .doc-row { margin-top: 12px; }
.doc-icon {
    width: 40px; height: 40px; border-radius: 6px; background: oklch(0.3 0.1 25 / 0.2);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.empty-state { text-align: center; padding: 48px 0; color: var(--text-dim); }

@media (max-width: 860px) {
    .hero-grid, .quickstart-grid, .tool-grid { grid-template-columns: 1fr !important; }
}