/* ─────────────────────────────────────────────────────────
   FontOps Documentation — Stylesheet
   Mirrors the "Architectural Utility" design system
   ───────────────────────────────────────────────────────── */

:root {
    /* Surface Hierarchy */
    --surface-lowest: #0E0E0E;
    --surface: #131313;
    --surface-low: #1B1C1C;
    --surface-container: #1F2020;
    --surface-high: #2A2A2A;
    --surface-highest: #353535;
    --surface-bright: #393939;

    /* Primary Accent */
    --primary: #A2C9FF;
    --primary-container: #3A72B0;
    --on-primary-container: #F0F4FF;

    /* Secondary */
    --secondary-container: #494949;
    --on-secondary-container: #B9B8B8;

    /* Tertiary */
    --tertiary: #F9BB59;

    /* Text */
    --text-on-surface: #E4E2E1;
    --text-variant: #C2C7D1;
    --text-meta: #8C919B;
    --text-secondary: #474747;

    /* Status */
    --success: #64C864;
    --error: #FFB4AB;
    --error-container: #93000A;

    /* Border */
    --ghost-border: rgba(71, 71, 71, 0.2);

    /* Spacing */
    --sp-xs: 4px;
    --sp-sm: 8px;
    --sp-md: 16px;
    --sp-lg: 24px;
    --sp-xl: 32px;

    /* Typography */
    --fs-specimen: 28px;
    --fs-display: 20px;
    --fs-preview: 16px;
    --fs-title: 13px;
    --fs-heading: 11px;
    --fs-body: 10px;
    --fs-caption: 9px;

    /* Doc-specific */
    --doc-max-width: 900px;
    --doc-text: 16px;
    --doc-heading: 24px;
    --doc-subheading: 18px;
    --doc-code-bg: #1a1a2e;
}

/* ═══════════════════════════════════════════════════════
   BASE STYLES
   ═══════════════════════════════════════════════════════ */

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--surface-lowest);
    color: var(--text-on-surface);
    font-size: var(--doc-text);
    line-height: 1.7;
    padding: 0;
}

.doc-container {
    max-width: var(--doc-max-width);
    margin: 0 auto;
    padding: 48px 32px;
}

/* ── Navigation Bar ─────────────────────────────────── */

.doc-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--surface);
    border-bottom: 1px solid var(--ghost-border);
    padding: 12px 32px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.doc-nav-brand {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--primary);
    text-decoration: none;
}

.doc-nav-links {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.doc-nav-links a {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-meta);
    text-decoration: none;
    padding: 4px 8px;
    border-radius: 4px;
    transition: color 0.15s, background 0.15s;
}

.doc-nav-links a:hover {
    color: var(--text-on-surface);
    background: var(--surface-high);
}

.doc-nav-links a.active {
    color: var(--primary);
    background: rgba(162, 201, 255, 0.08);
}

/* ── Typography ─────────────────────────────────────── */

h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-on-surface);
    margin-bottom: 8px;
}

h2 {
    font-size: var(--doc-heading);
    font-weight: 700;
    color: var(--text-on-surface);
    margin-top: 48px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--ghost-border);
}

h3 {
    font-size: var(--doc-subheading);
    font-weight: 600;
    color: var(--text-variant);
    margin-top: 32px;
    margin-bottom: 12px;
}

p { margin-bottom: 16px; }

a { color: var(--primary); }

.doc-subtitle {
    font-size: 18px;
    color: var(--text-meta);
    margin-bottom: 32px;
}

.doc-version {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--primary);
    background: rgba(162, 201, 255, 0.1);
    padding: 3px 10px;
    border-radius: 3px;
    margin-bottom: 16px;
}

/* ── Lists ──────────────────────────────────────────── */

ul, ol {
    margin-bottom: 16px;
    padding-left: 24px;
}

li { margin-bottom: 6px; }

/* ── Code ───────────────────────────────────────────── */

code {
    font-family: "Cascadia Code", "JetBrains Mono", "Fira Code", monospace;
    font-size: 14px;
    background: var(--surface-container);
    padding: 2px 6px;
    border-radius: 3px;
    color: var(--primary);
}

pre {
    background: var(--surface-container);
    border: 1px solid var(--ghost-border);
    border-radius: 6px;
    padding: 16px;
    margin-bottom: 16px;
    overflow-x: auto;
}

pre code {
    background: none;
    padding: 0;
    font-size: 13px;
    color: var(--text-on-surface);
}

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

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 24px;
    font-size: 14px;
}

th {
    text-align: left;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-meta);
    padding: 8px 12px;
    border-bottom: 1px solid var(--ghost-border);
}

td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--ghost-border);
    color: var(--text-variant);
}

/* ── Info Boxes ─────────────────────────────────────── */

.doc-tip, .doc-warning, .doc-note {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 14px;
    border-left: 3px solid;
}

.doc-tip {
    background: rgba(100, 200, 100, 0.06);
    border-color: var(--success);
}

.doc-warning {
    background: rgba(249, 187, 89, 0.06);
    border-color: var(--tertiary);
}

.doc-note {
    background: rgba(162, 201, 255, 0.06);
    border-color: var(--primary);
}

.doc-tip::before { content: "Tip: "; font-weight: 700; color: var(--success); }
.doc-warning::before { content: "Warning: "; font-weight: 700; color: var(--tertiary); }
.doc-note::before { content: "Note: "; font-weight: 700; color: var(--primary); }

/* ── Feature Cards (index page) ─────────────────────── */

.doc-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
    margin: 24px 0;
}

.doc-feature-card {
    background: var(--surface-container);
    border: 1px solid var(--ghost-border);
    border-radius: 8px;
    padding: 20px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, transform 0.15s;
}

.doc-feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.doc-feature-card h3 {
    margin-top: 0;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--primary);
}

.doc-feature-card p {
    font-size: 13px;
    color: var(--text-meta);
    margin-bottom: 0;
}

/* ── Steps ──────────────────────────────────────────── */

.doc-steps {
    counter-reset: step;
    list-style: none;
    padding-left: 0;
}

.doc-steps li {
    counter-increment: step;
    padding-left: 40px;
    position: relative;
    margin-bottom: 16px;
}

.doc-steps li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    top: 2px;
    width: 26px;
    height: 26px;
    background: var(--primary-container);
    color: var(--on-primary-container);
    font-size: 12px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ═══════════════════════════════════════════════════════
   UI MOCKUP COMPONENTS
   Recreate the FontOps UI look in static HTML/CSS
   ═══════════════════════════════════════════════════════ */

.mock-window {
    background: var(--surface);
    border: 1px solid var(--ghost-border);
    border-radius: 8px;
    overflow: hidden;
    margin: 24px 0;
    font-size: 11px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    position: relative;
}

.mock-titlebar {
    background: var(--surface-low);
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--text-meta);
    border-bottom: 1px solid var(--ghost-border);
}

.mock-body {
    display: flex;
    min-height: 280px;
}

/* ── Sidebar ────────────────────────────────────────── */

.mock-sidebar {
    width: 180px;
    min-width: 180px;
    background: var(--surface-low);
    border-right: 1px solid var(--ghost-border);
    display: flex;
    flex-direction: column;
    padding-top: 8px;
}

.mock-sidebar-brand {
    padding: 8px 12px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--text-meta);
    display: flex;
    align-items: center;
    gap: 8px;
}

.mock-sidebar-brand .brand-icon {
    width: 24px;
    height: 24px;
    background: var(--primary-container);
    color: var(--on-primary-container);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

.mock-nav-item {
    padding: 8px 16px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-meta);
    cursor: default;
    border-left: 3px solid transparent;
}

.mock-nav-item.active {
    background: rgba(162, 201, 255, 0.06);
    color: var(--primary);
    border-left-color: var(--primary);
}

.mock-sidebar-footer {
    margin-top: auto;
    padding: 10px 16px;
    border-top: 1px solid var(--ghost-border);
    font-size: 9px;
    color: var(--text-meta);
    display: flex;
    align-items: center;
    gap: 6px;
}

.mock-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}

.mock-dot-green { background: var(--success); }
.mock-dot-red { background: var(--error); }

/* ── Main Content ───────────────────────────────────── */

.mock-main {
    flex: 1;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow: hidden;
}

/* ── Toolbar ────────────────────────────────────────── */

.mock-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
}

.mock-search {
    background: var(--surface-container);
    border: 1px solid var(--ghost-border);
    border-radius: 4px;
    padding: 6px 10px;
    color: var(--text-meta);
    font-size: 11px;
    flex: 1;
    max-width: 300px;
}

/* ── Buttons ────────────────────────────────────────── */

.mock-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 2px;
    border-radius: 3px;
    border: none;
    cursor: default;
    white-space: nowrap;
}

.mock-btn-default {
    background: var(--secondary-container);
    color: var(--on-secondary-container);
}

.mock-btn-primary {
    background: var(--primary-container);
    color: var(--on-primary-container);
}

.mock-btn-danger {
    background: var(--error-container);
    color: var(--error);
}

.mock-btn-sm {
    padding: 3px 8px;
    font-size: 8px;
}

/* ── Pills / Filter Chips ──────────────────────────── */

.mock-pill-bar {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.mock-pill {
    padding: 3px 10px;
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 1px;
    border-radius: 12px;
    background: var(--secondary-container);
    color: var(--on-secondary-container);
    cursor: default;
}

.mock-pill.active {
    background: var(--primary-container);
    color: var(--on-primary-container);
}

/* ── Sub-tabs ───────────────────────────────────────── */

.mock-subtab-bar {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--ghost-border);
    margin-bottom: 8px;
}

.mock-subtab {
    padding: 6px 14px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-meta);
    cursor: default;
    border-bottom: 2px solid transparent;
}

.mock-subtab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* ── Cards ──────────────────────────────────────────── */

.mock-card {
    background: var(--surface-container);
    border: 1px solid var(--ghost-border);
    border-radius: 6px;
    padding: 10px 12px;
    margin-bottom: 6px;
}

.mock-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.mock-card-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-on-surface);
}

.mock-card-meta {
    font-size: 9px;
    letter-spacing: 1px;
    color: var(--text-meta);
}

.mock-card-preview {
    font-size: 20px;
    color: var(--text-variant);
    padding: 8px 0;
}

/* ── Stats / Compliance Summary ─────────────────────── */

.mock-stats {
    display: flex;
    gap: 32px;
    padding: 16px 0;
    justify-content: center;
}

.mock-stat {
    text-align: center;
}

.mock-stat-number {
    font-size: var(--fs-specimen);
    font-weight: 700;
    line-height: 1;
}

.mock-stat-number.green { color: var(--success); }
.mock-stat-number.red { color: var(--error); }
.mock-stat-number.yellow { color: var(--tertiary); }

.mock-stat-label {
    font-size: 9px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-meta);
    margin-top: 4px;
}

/* ── Progress Bar ───────────────────────────────────── */

.mock-progress {
    height: 4px;
    background: var(--surface-high);
    border-radius: 2px;
    overflow: hidden;
    margin: 8px 0;
}

.mock-progress-fill {
    height: 100%;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--success) 0%, var(--success) var(--fill), var(--error) var(--fill), var(--error) 100%);
}

/* ── List Rows ──────────────────────────────────────── */

.mock-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-bottom: 1px solid var(--ghost-border);
    font-size: 11px;
}

.mock-row:last-child { border-bottom: none; }

.mock-row-icon {
    font-size: 12px;
}

.mock-row-name {
    font-weight: 600;
    color: var(--text-on-surface);
}

.mock-row-detail {
    color: var(--text-meta);
    font-size: 10px;
}

.mock-row-spacer { flex: 1; }

/* ── Badges / Tags ──────────────────────────────────── */

.mock-badge {
    display: inline-block;
    padding: 1px 6px;
    font-size: 8px;
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 3px;
}

.mock-badge-primary {
    background: rgba(162, 201, 255, 0.15);
    color: var(--primary);
}

.mock-badge-success {
    background: rgba(100, 200, 100, 0.15);
    color: var(--success);
}

.mock-badge-error {
    background: rgba(255, 180, 171, 0.15);
    color: var(--error);
}

.mock-badge-warning {
    background: rgba(249, 187, 89, 0.15);
    color: var(--tertiary);
}

/* ── Status Indicators ──────────────────────────────── */

.mock-status-compliant { color: var(--success); }
.mock-status-noncompliant { color: var(--error); }
.mock-status-ignored { color: var(--tertiary); }

/* ── Form Fields (mockup) ───────────────────────────── */

.mock-field {
    background: var(--surface-container);
    border: 1px solid var(--ghost-border);
    border-radius: 4px;
    padding: 6px 10px;
    color: var(--text-on-surface);
    font-size: 11px;
    width: 100%;
}

.mock-field-label {
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-meta);
    margin-bottom: 4px;
}

.mock-slider {
    height: 4px;
    background: var(--surface-high);
    border-radius: 2px;
    position: relative;
    margin: 8px 0;
}

.mock-slider-thumb {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    top: -4px;
}

/* ── Callout Annotations ────────────────────────────── */

.mock-callout {
    position: absolute;
    width: 22px;
    height: 22px;
    background: var(--primary);
    color: var(--surface);
    font-size: 11px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    box-shadow: 0 0 0 2px var(--surface);
}

.mock-legend {
    margin-top: 16px;
    padding: 12px 16px;
    background: var(--surface-container);
    border-radius: 6px;
    font-size: 13px;
}

.mock-legend dt {
    display: inline-flex;
    width: 22px;
    height: 22px;
    background: var(--primary);
    color: var(--surface);
    font-size: 11px;
    font-weight: 700;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    margin-right: 8px;
    vertical-align: middle;
}

.mock-legend dd {
    display: inline;
    color: var(--text-variant);
    margin-bottom: 8px;
}

.mock-legend dd::after {
    content: "";
    display: block;
    margin-bottom: 6px;
}

/* ── Section header (selected border accent) ─────────── */

.mock-selected {
    border-left: 3px solid var(--primary) !important;
    background: var(--surface-container) !important;
}

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

.doc-footer {
    margin-top: 64px;
    padding-top: 24px;
    border-top: 1px solid var(--ghost-border);
    font-size: 12px;
    color: var(--text-meta);
    text-align: center;
}

/* ── Changelog-specific ─────────────────────────────── */

.changelog-version {
    margin-top: 40px;
}

.changelog-version h2 {
    display: flex;
    align-items: center;
    gap: 12px;
}

.changelog-date {
    font-size: 13px;
    font-weight: 400;
    color: var(--text-meta);
}

.changelog-tag {
    display: inline-block;
    padding: 2px 8px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1px;
    border-radius: 3px;
    margin-bottom: 8px;
}

.changelog-added { background: rgba(100, 200, 100, 0.15); color: var(--success); }
.changelog-changed { background: rgba(162, 201, 255, 0.15); color: var(--primary); }
.changelog-fixed { background: rgba(249, 187, 89, 0.15); color: var(--tertiary); }
.changelog-removed { background: rgba(255, 180, 171, 0.15); color: var(--error); }

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

@media (max-width: 700px) {
    .doc-container { padding: 24px 16px; }
    .mock-sidebar { width: 48px; min-width: 48px; }
    .mock-nav-item { font-size: 0; padding: 8px; text-align: center; }
    .mock-sidebar-brand span { display: none; }
    .doc-features { grid-template-columns: 1fr; }
    .mock-stats { gap: 16px; }
}