/* /zero — Unbound Zero API landing. Standalone: no Bootstrap. Brand tokens match landing.css. */
:root {
    --accent: #ff7045;
    --accent-ink: #c4471f;          /* accent as text on light surfaces (AA) */
    --accent-display: #e85a30;      /* accent as large bold text: closer to the brand orange, AA for large text */
    --bg: #ffffff;
    --surface: #f6f6f7;
    --ink: #16161a;
    --ink-2: rgba(0, 0, 0, 0.72);
    --ink-3: rgba(0, 0, 0, 0.56);
    --line: rgba(0, 0, 0, 0.10);
    --line-strong: rgba(0, 0, 0, 0.18);
    --code-bg: #16161a;
    --code-ink: #e9e9ee;
    --bar: #c9c9cf;
    --figure-bg: #a9a9a9;           /* the cover's studio grey */
    --radius: 10px;
    --sans: 'Work Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
    --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root {
        --accent-ink: #ff8a64;
        --accent-display: #ff7045;
        --bg: #0f0f12;
        --surface: #18181c;
        --ink: #ececf1;
        --ink-2: rgba(255, 255, 255, 0.74);
        --ink-3: rgba(255, 255, 255, 0.56);
        --line: rgba(255, 255, 255, 0.10);
        --line-strong: rgba(255, 255, 255, 0.20);
        --code-bg: #1b1b20;
        --bar: #4a4a52;
        color-scheme: dark;
    }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font: 400 16px/1.6 var(--sans);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }

code {
    font-family: var(--mono);
    font-size: 0.875em;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: 0.05em 0.35em;
}

h1, h2, h3 { margin: 0; letter-spacing: -0.02em; }
h2 { font-size: 1.75rem; font-weight: 600; margin-bottom: 0.75rem; }
h3 { font-size: 1rem; font-weight: 600; margin: 2rem 0 0.6rem; letter-spacing: 0; }

.z-wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }
.z-wrap-wide { max-width: 1280px; }
.z-muted { color: var(--ink-2); }
.z-break { word-break: break-all; }

/* ── Top bar ─────────────────────────────────────────── */
.z-top {
    position: sticky; top: 0; z-index: 10;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
}
.z-top-row { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.z-brand { display: flex; align-items: center; gap: 8px; font-weight: 600; text-decoration: none; }
.z-nav { display: flex; align-items: center; gap: 20px; font-size: 0.9rem; }
.z-nav a:not(.z-btn) { color: var(--ink-2); text-decoration: none; }
.z-nav a:not(.z-btn):hover { color: var(--ink); }

/* ── Buttons ─────────────────────────────────────────── */
.z-btn {
    display: inline-flex; align-items: center; justify-content: center;
    min-height: 44px; padding: 0 20px;
    font: 500 0.95rem/1 var(--sans);
    color: var(--bg); background: var(--ink);
    border: 1px solid var(--ink); border-radius: 8px;
    text-decoration: none; cursor: pointer;
    transition: opacity 0.15s;
}
.z-btn:hover { opacity: 0.86; }
.z-btn-ghost { color: var(--ink); background: transparent; border-color: var(--line-strong); }
.z-btn-ghost:hover { opacity: 1; background: var(--surface); }
.z-btn-sm { min-height: 34px; padding: 0 14px; font-size: 0.85rem; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Cover ───────────────────────────────────────────── */
/* The first screen, like a title slide: full width, everything centered, on a studio
   grey lit softly from behind the model. Fixed light colors in both themes — it's the
   3D view's backdrop, not a page surface. */
.z-cover {
    --ink: #111114;
    display: flex; flex-direction: column; align-items: center;
    height: calc(100svh - 56px); min-height: 600px; max-height: 1080px;
    padding: clamp(32px, 8vh, 112px) 24px 0;
    background: radial-gradient(ellipse 60% 55% at 50% 72%, #bdbdbd, var(--figure-bg) 70%, #9c9c9c);
    color: var(--ink);
    text-align: center;
    overflow: hidden;
}
.z-cover-text { max-width: 1120px; }
.z-eyebrow {
    margin: 0 0 20px;
    font: 500 0.8rem/1 var(--mono);
    letter-spacing: 0.12em; text-transform: uppercase;
    color: rgba(0, 0, 0, 0.62);
}
.z-cover h1 {
    /* Bounded by height too, so a short screen still leaves the render room. */
    font-size: clamp(2.25rem, min(5vw, 7.5vh), 4.5rem); line-height: 1.04; font-weight: 600;
    letter-spacing: -0.03em;
    text-wrap: balance;
}
.z-lead { font-size: clamp(1.05rem, 1.6vw, 1.3rem); color: rgba(0, 0, 0, 0.74); max-width: 34em; margin: 20px auto 32px; text-wrap: balance; }
.z-cta, .z-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.z-cta { justify-content: center; }
.z-cover .z-btn { color: #fff; background: var(--ink); border-color: var(--ink); }
.z-cover .z-btn-ghost { color: var(--ink); background: transparent; border-color: rgba(0, 0, 0, 0.35); }
.z-cover .z-btn-ghost:hover { background: rgba(255, 255, 255, 0.2); }

/* The live 3D view (client/zero/main.js) fills what the text leaves. Vertical
   swipes still scroll the page; horizontal drags turn the model. */
.z-cover-figure {
    display: flex; flex-direction: column;
    flex: 1; min-height: 0; width: 100%; max-width: 1280px;
    margin: clamp(8px, 2vh, 24px) 0 0;
    touch-action: pan-y;
    cursor: grab;
}
.z-cover-figure.is-dragging { cursor: grabbing; }
.z-viewer-canvas { display: block; flex: 1; min-height: 0; width: 100%; opacity: 0; transition: opacity 0.8s ease; }
.z-viewer-canvas.is-ready { opacity: 1; }
.z-viewer-caption {
    margin: 0; padding: 8px 0 clamp(12px, 3vh, 28px); min-height: 1em;
    pointer-events: none;
    font: 500 0.72rem/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase;
    color: rgba(0, 0, 0, 0.55);
}

/* ── Sections ────────────────────────────────────────── */
.z-section { padding-top: 96px; }

.z-steps { list-style: none; counter-reset: step; padding: 0; margin: 24px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.z-steps li { counter-increment: step; border-top: 2px solid var(--ink); padding-top: 16px; }
.z-steps li::before { content: counter(step, decimal-leading-zero); font: 500 0.8rem/1 var(--mono); color: var(--ink-3); }
.z-steps h3 { margin: 10px 0 6px; font-size: 1.1rem; }
.z-steps p { margin: 0 0 12px; color: var(--ink-2); }
.z-quote { font-style: italic; }

/* Best for: three use cases side by side, a thin accent rule over each. */
.z-best { list-style: none; padding: 0; margin: 24px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.z-best li { border-top: 2px solid var(--accent); padding-top: 16px; }
.z-best-icon {
    display: flex; justify-content: center;
    margin-bottom: 14px;
}
.z-best-icon svg {
    width: 48px; height: 48px;
    fill: none; stroke: #fff; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round;
}
.z-best-icon .z-fill { fill: #fff; stroke: none; }
.z-best h3 { margin: 0 0 6px; font-size: 1.1rem; }
.z-best p { margin: 0; color: var(--ink-2); }
.z-arrow { font-weight: 500; color: var(--accent-ink); text-decoration: none; }
.z-arrow::after { content: ' \2192'; }
.z-arrow:hover { text-decoration: underline; }

/* ── Tabs ────────────────────────────────────────────── */
.z-tabs { display: flex; gap: 4px; margin: 32px 0 0; border-bottom: 1px solid var(--line); }
.z-tabs [role="tab"] {
    appearance: none; background: none; border: 0; cursor: pointer;
    font: 500 0.95rem/1 var(--sans); color: var(--ink-3);
    padding: 14px 16px; margin-bottom: -1px;
    border-bottom: 2px solid transparent;
}
.z-tabs [role="tab"]:hover { color: var(--ink); }
.z-tabs [role="tab"][aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.z-panel { padding-top: 8px; }
.z-panel > p:first-child { margin-top: 24px; }

/* ── Code ────────────────────────────────────────────── */
.z-code {
    margin: 0; padding: 16px 18px;
    background: var(--code-bg); color: var(--code-ink);
    border-radius: var(--radius);
    font: 400 0.82rem/1.65 var(--mono);
    overflow-x: auto;
}
.z-code code { background: none; border: 0; padding: 0; font-size: inherit; color: inherit; }
.z-code-file { max-height: 420px; overflow: auto; white-space: pre-wrap; }
.z-copy {
    position: absolute; top: 8px; right: 8px;
    font: 500 0.75rem/1 var(--sans); color: var(--code-ink);
    background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 6px; padding: 6px 10px; cursor: pointer;
}
.z-copy:hover { background: rgba(255, 255, 255, 0.16); }
.z-code-shell { position: relative; }
.z-note { font-size: 0.875rem; color: var(--ink-3); margin: 8px 0 0; }

/* ── Tables ──────────────────────────────────────────── */
.z-table-wrap { overflow-x: auto; }
.z-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.z-table th { text-align: left; font: 500 0.75rem/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-3); padding: 0 16px 10px 0; border-bottom: 1px solid var(--line-strong); }
.z-table td { padding: 10px 16px 10px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.z-table td:first-child { white-space: nowrap; width: 1%; }

.z-list { margin: 0; padding-left: 1.2em; color: var(--ink-2); }
.z-list li { margin: 4px 0; }

/* ── Comparison ──────────────────────────────────────── */
.z-charts { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; margin-top: 32px; }
.z-chart { margin: 0; }
.z-chart figcaption { font-weight: 600; margin-bottom: 12px; }
.z-bars { width: 100%; border-collapse: separate; border-spacing: 0 2px; }
.z-bars th { width: 9.5em; padding-right: 12px; text-align: left; font-weight: 400; font-size: 0.875rem; color: var(--ink-2); white-space: nowrap; }
.z-bars td { display: flex; align-items: center; gap: 10px; height: 34px; }
.z-bar {
    /* The longest bar leaves room for its value label. */
    display: block; height: 22px; width: calc(var(--pct) * 0.75);
    background: var(--bar);
    border-radius: 0 4px 4px 0;   /* anchored to the baseline, rounded at the data end */
}
.z-val { font: 500 0.82rem/1 var(--mono); color: var(--ink-2); white-space: nowrap; }
.is-ours th { color: var(--ink); font-weight: 600; }
.is-ours .z-bar { background: var(--accent); }
.is-ours .z-val { color: var(--ink); }
.z-val.is-pending { color: var(--ink-3); font-style: italic; }
.z-flag { margin-top: 24px; font-size: 0.8rem; color: var(--ink-3); }

/* The free offer under the charts: one line, the number in the accent. */
.z-free {
    display: flex; flex-wrap: wrap; align-items: center; gap: 8px 24px;
    margin-top: 40px; padding: 24px 28px;
    background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
}
.z-free-head { margin: 0; font-size: 1.35rem; font-weight: 600; letter-spacing: -0.01em; }
.z-free-head strong { color: var(--accent-display); font-weight: 700; }
.z-free-sub { margin: 0; color: var(--ink-3); flex: 1; }
/* Models a month on each plan: one quiet row under the free offer, wrapping on phones. */
.z-plans {
    flex-basis: 100%; display: flex; flex-wrap: wrap; gap: 6px 24px;
    margin: 8px 0 0; padding: 16px 0 0; list-style: none;
    border-top: 1px solid var(--line); font-size: 0.92rem; color: var(--ink-2);
}
.z-plan-name { color: var(--ink); font-weight: 600; margin-right: 4px; }
.z-plans strong { color: var(--ink); font-weight: 700; }
.z-plan-price { color: var(--ink-3); margin-left: 4px; font-size: 0.85em; }
.z-plans a { color: var(--ink-2); }
@media (max-width: 760px) {
    .z-free { padding: 20px; }
    .z-free-sub { flex-basis: 100%; }
}

/* ── Footer ──────────────────────────────────────────── */
.z-footer { margin-top: 120px; border-top: 1px solid var(--line); font-size: 0.85rem; color: var(--ink-3); }
.z-footer-row { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; padding-top: 24px; padding-bottom: 32px; }
.z-footer nav { display: flex; gap: 20px; }
.z-footer a { text-decoration: none; }
.z-footer a:hover { color: var(--ink); }

/* ── Narrow screens ──────────────────────────────────── */
@media (max-width: 760px) {
    .z-wrap { padding: 0 16px; }
    .z-steps, .z-charts, .z-best { grid-template-columns: 1fr; }
    .z-section { padding-top: 72px; }
    .z-nav a:not(.z-btn) { display: none; }
    .z-bars th { width: 8.5em; }
    /* No room beside the code: give the copy button its own strip. */
    .z-code-shell .z-code { padding-top: 44px; }
    .z-table td:first-child { white-space: normal; width: 40%; }
    .z-table td:first-child code { word-break: break-all; }
}