/* PRIMVS web style — matches the iOS application's design language.
   Dark default: deep near-black #070707, warm off-white ink #F2F2EE,
   Roman Gold accent #D4A843, amber hover #FF6A2C. SF Pro system stack,
   condensed-black headers (Anton substitute), monospaced digits via
   tabular-nums. No web fonts, no JavaScript, no tracking. */

:root {
    --bg: #070707;
    --bg-elevated: #0E0E0E;
    --ink: #F2F2EE;
    --ink-prose: #D4D3CE;
    --ink-dim: #7A776E;
    --rule: rgba(212, 168, 67, 0.14);
    --rule-strong: rgba(212, 168, 67, 0.36);
    --accent: #D4A843;
    --accent-hot: #FF6A2C;
    --negative: #B85A45;

    --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;

    --max-content: 720px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--ink-prose);
    font-family: var(--font-system);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body {
    min-height: 100vh;
    font-feature-settings: "kern", "liga", "tnum";
    font-variant-numeric: tabular-nums;
}

/* ── Page bar (top) ───────────────────────────────────────────────── */

.pagebar {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: 22px 28px 18px;
    border-bottom: 1px solid var(--rule);
    background: var(--bg);
    position: sticky;
    top: 0;
    z-index: 10;
}

.pagebar .brand {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: var(--accent);
    text-transform: uppercase;
    text-decoration: none;
}

.pagebar .nav {
    display: flex;
    gap: 22px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.22em;
}

.pagebar .nav a {
    color: var(--ink-prose);
    text-decoration: none;
    text-transform: uppercase;
    transition: color 120ms ease;
}

.pagebar .nav a:hover,
.pagebar .nav a.active {
    color: var(--accent);
}

/* ── Page container ───────────────────────────────────────────────── */

main {
    max-width: var(--max-content);
    margin: 0 auto;
    padding: 56px 28px 88px;
}

/* ── Hero (index only) ────────────────────────────────────────────── */

.hero {
    margin-bottom: 56px;
}

.hero h1 {
    font-size: clamp(56px, 14vw, 120px);
    font-weight: 900;
    font-stretch: 75%;
    letter-spacing: -0.01em;
    line-height: 0.92;
    color: var(--ink);
    margin: 0 0 18px;
    text-transform: uppercase;
}

.hero .lede {
    font-size: 16px;
    font-style: italic;
    color: var(--ink);
    line-height: 1.35;
    margin: 0 0 28px;
    max-width: 560px;
}

.hero .datestamp {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.22em;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 12px;
}

.hero .tagline {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.18em;
    color: var(--ink-dim);
    text-transform: uppercase;
    margin: 0 0 12px;
}

/* ── Section labels (Anton substitute) ────────────────────────────── */

h2 {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 900;
    font-stretch: 75%;
    letter-spacing: 0.005em;
    line-height: 1;
    color: var(--ink);
    margin: 48px 0 8px;
    text-transform: uppercase;
}

h2 + p,
h2 + ul,
h2 + ol,
h2 + table {
    margin-top: 18px;
}

h3 {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--accent);
    text-transform: uppercase;
    margin: 32px 0 10px;
}

h4 {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: var(--accent);
    text-transform: uppercase;
    margin: 22px 0 8px;
}

/* ── Prose ────────────────────────────────────────────────────────── */

p {
    margin: 0 0 18px;
    color: var(--ink-prose);
}

p.small {
    font-size: 13px;
    color: var(--ink-dim);
}

strong {
    color: var(--ink);
    font-weight: 700;
}

em {
    font-style: italic;
    color: var(--ink);
}

a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid var(--rule-strong);
    transition: color 120ms ease, border-color 120ms ease;
}

a:hover {
    color: var(--accent-hot);
    border-bottom-color: var(--accent-hot);
}

hr {
    border: 0;
    border-top: 1px solid var(--rule);
    margin: 40px 0;
}

ul, ol {
    margin: 0 0 22px;
    padding-left: 22px;
}

li {
    margin-bottom: 6px;
}

li::marker {
    color: var(--accent);
}

blockquote {
    border-left: 3px solid var(--accent);
    margin: 22px 0;
    padding: 4px 0 4px 18px;
    color: var(--ink);
    font-style: italic;
    font-size: 18px;
}

code {
    font-family: "SF Mono", ui-monospace, Menlo, monospace;
    font-size: 0.88em;
    background: var(--bg-elevated);
    color: var(--ink);
    padding: 1px 6px;
    border-radius: 3px;
    border: 1px solid var(--rule);
}

/* ── Tables ───────────────────────────────────────────────────────── */

table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 28px;
    font-size: 14px;
}

th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--rule);
    vertical-align: top;
}

th {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.18em;
    color: var(--accent);
    text-transform: uppercase;
    border-bottom-color: var(--rule-strong);
}

td code {
    white-space: nowrap;
}

/* ── Footer ───────────────────────────────────────────────────────── */

footer {
    max-width: var(--max-content);
    margin: 0 auto;
    padding: 32px 28px 56px;
    border-top: 1px solid var(--rule);
    font-size: 12px;
    color: var(--ink-dim);
}

footer .footer-row {
    display: flex;
    flex-wrap: wrap;
    gap: 22px;
    margin-bottom: 14px;
}

footer .footer-row a {
    color: var(--ink-prose);
    border-bottom: none;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 11px;
    font-weight: 600;
}

footer .footer-row a:hover {
    color: var(--accent);
}

footer .meta {
    color: var(--ink-dim);
    font-size: 11px;
    letter-spacing: 0.04em;
}

/* ── Feature blocks (index) ──────────────────────────────────────── */

.feature {
    padding: 22px 0 18px;
    border-bottom: 1px solid var(--rule);
}

.feature:last-of-type {
    border-bottom: none;
}

.feature .label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.22em;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 6px;
}

.feature .title {
    font-size: 22px;
    font-weight: 800;
    color: var(--ink);
    line-height: 1.2;
    margin: 0 0 10px;
}

.feature p {
    margin: 0;
}

/* ── State indicator pill (homage to the app) ────────────────────── */

.state-tablet {
    display: inline-flex;
    align-items: baseline;
    gap: 4px;
    padding: 6px 10px;
    border: 1px solid var(--accent);
    background: rgba(212, 168, 67, 0.08);
    color: var(--accent);
    font-weight: 800;
    font-size: 13px;
    letter-spacing: 0.04em;
    line-height: 1;
    border-radius: 2px;
    font-feature-settings: "tnum";
}

/* ── Doc page header (privacy/terms/security) ────────────────────── */

.doc-meta {
    font-size: 12px;
    color: var(--ink-dim);
    margin-bottom: 18px;
    letter-spacing: 0.02em;
}

.doc-meta strong {
    color: var(--accent);
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    margin-right: 6px;
}

.doc-meta .row {
    margin-bottom: 4px;
}

/* ── Theme toggle (DARK | LIGHT, matches the app's PageBar control) ── */

.theme-toggle {
    display: inline-flex;
    gap: 6px;
    align-items: center;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    cursor: pointer;
    user-select: none;
}

.theme-toggle .opt {
    color: var(--ink-dim);
    transition: color 120ms ease;
}

.theme-toggle .opt.active {
    color: var(--accent);
}

.theme-toggle .sep {
    color: var(--rule-strong);
}

.text-size {
    display: inline-flex;
    gap: 10px;
    align-items: baseline;
    margin-left: 16px;
}

.text-size .ts-btn {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    font-family: inherit;
    font-weight: 700;
    color: var(--ink-dim);
    transition: color 120ms ease;
}

.text-size .ts-btn { font-size: 13px; }
.text-size .ts-btn.ts-plus { font-size: 17px; }

.text-size .ts-btn:hover {
    color: var(--accent);
}

.theme-toggle:hover .opt:not(.active) {
    color: var(--ink);
}

/* ── Responsive ──────────────────────────────────────────────────── */

@media (max-width: 540px) {
    .pagebar {
        padding: 18px 20px 14px;
        flex-wrap: wrap;
        gap: 14px;
    }
    .pagebar .nav {
        gap: 14px;
        flex-wrap: wrap;
    }
    main { padding: 36px 20px 56px; }
    footer { padding: 28px 20px 48px; }
    .hero { margin-bottom: 36px; }
    .hero .lede { font-size: 16px; }
    h2 { margin-top: 36px; }

    /* Tables on phone: keep within viewport. Smaller text + tighter padding +
       allow cell content to wrap (vs nowrap which forces horizontal scroll). */
    table {
        font-size: 12px;
        width: 100%;
    }
    table th,
    table td {
        padding: 7px 6px;
        word-break: normal;
        overflow-wrap: anywhere;
    }
    table code {
        font-size: 0.88em;
        word-break: break-all;
    }
}

/* ── Light mode ──────────────────────────────────────────────────── */
/* Two ways to enter light mode:
   1. The user clicks the DARK / LIGHT toggle in the PageBar, which sets
      `data-theme="light"` on <html> and persists via localStorage.
   2. If no manual preference is set, the system's `prefers-color-scheme`
      decides automatically.
   `data-theme="dark"` and `data-theme="light"` always win over the system
   preference — so the manual toggle is honored on every visit. */

[data-theme="light"] {
    --bg: #F8F4EC;
    --bg-elevated: #EFE9DC;
    --ink: #1B1B1B;
    --ink-prose: #3B3933;
    --ink-dim: #87837A;
    --accent: #B08308;
    --accent-hot: #C41E3A;
    --rule: rgba(176, 131, 8, 0.22);
    --rule-strong: rgba(176, 131, 8, 0.42);
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        --bg: #F8F4EC;
        --bg-elevated: #EFE9DC;
        --ink: #1B1B1B;
        --ink-prose: #3B3933;
        --ink-dim: #87837A;
        --accent: #B08308;
        --accent-hot: #C41E3A;
        --rule: rgba(176, 131, 8, 0.22);
        --rule-strong: rgba(176, 131, 8, 0.42);
    }
}