/* ============ Design tokens (brandbook) ============ */
:root {
  --color-primary: #1d4ed8;
  --color-primary-hover: #1e40af;
  --color-accent: #0f766e;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --color-warning: #d97706;

  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 64px;

  --radius-sm: 6px; --radius-md: 12px; --radius-lg: 20px; --radius-full: 999px;

  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 4px 12px rgba(15,23,42,.08);
  --shadow-lg: 0 12px 32px rgba(15,23,42,.12);

  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;

  --max-width: 1180px;
  --header-h: 64px;
}

[data-theme="dark"] {
  --color-bg: #0b1120;
  --color-surface: #111a2e;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-border: #1e293b;
  --color-primary: #5b8bff;
  --color-primary-hover: #7ea1ff;
  --color-accent: #2dd4bf;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow-md: 0 4px 12px rgba(0,0,0,.5);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.6);
}

/* ============ Base ============ */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; font-family: var(--font-sans); color: var(--color-text);
  background: var(--color-bg); line-height: 1.6; font-size: 16px;
  transition: background .25s, color .25s;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }
.muted { color: var(--color-text-muted); font-size: .9em; }
.small { font-size: .82em; }
code, pre { font-family: var(--font-mono); font-size: .92em; }
pre { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); overflow-x: auto; }
.skip-link { position: absolute; left: -999px; top: 0; background: var(--color-primary); color: #fff; padding: 8px 16px; border-radius: 0 0 8px 0; z-index: 100; }
.skip-link:focus { left: 0; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-4); }

/* ============ Buttons ============ */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: var(--radius-sm); font-size: .95em; font-weight: 600; border: 1px solid transparent; cursor: pointer; transition: transform .15s, box-shadow .15s, background .15s; text-decoration: none; }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); color: #fff; }
.btn-outline { border-color: var(--color-border); color: var(--color-text); background: transparent; }
.btn-ghost { color: var(--color-primary); background: transparent; }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: .85em; }
.btn-xs { padding: 4px 8px; font-size: .78em; }
.btn-block { width: 100%; justify-content: center; }
.is-disabled { opacity: .5; pointer-events: none; }

/* ============ Header ============ */
.site-header { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--color-surface) 85%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--color-border); }
.header-inner { display: flex; align-items: center; gap: var(--space-5); height: var(--header-h); }
.logo { display: flex; align-items: center; gap: 10px; color: var(--color-text); font-weight: 700; font-size: 1.05em; }
.logo-mark { width: 36px; height: 36px; border-radius: 10px; background: var(--color-primary); color: #fff; display: grid; place-items: center; font-weight: 800; }
.main-nav { display: flex; gap: var(--space-1); flex-wrap: wrap; }
.main-nav a { padding: 8px 12px; border-radius: var(--radius-sm); color: var(--color-text-muted); font-weight: 500; }
.main-nav a:hover { color: var(--color-text); background: color-mix(in srgb, var(--color-primary) 8%, transparent); }
.main-nav a.is-active { color: var(--color-primary); background: color-mix(in srgb, var(--color-primary) 10%, transparent); }
.header-actions { margin-left: auto; display: flex; align-items: center; gap: var(--space-3); }
.search-form { display: flex; align-items: center; }
.search-form input { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-full); padding: 8px 16px; width: 180px; color: var(--color-text); font: inherit; outline: none; transition: border-color .15s, width .3s; }
.search-form input:focus { border-color: var(--color-primary); width: 240px; }
.theme-toggle { background: none; border: none; cursor: pointer; color: var(--color-text-muted); padding: 8px; border-radius: var(--radius-sm); }
.theme-toggle:hover { color: var(--color-text); background: color-mix(in srgb, var(--color-border) 40%, transparent); }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ============ Hero ============ */
.hero { padding: var(--space-7) 0 var(--space-6); }
.hero .container { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--space-6); align-items: center; }
.hero__badge { display: inline-block; background: color-mix(in srgb, var(--color-primary) 12%, transparent); color: var(--color-primary); padding: 6px 14px; border-radius: var(--radius-full); font-size: .85em; font-weight: 600; margin-bottom: var(--space-3); }
.hero__title { font-size: clamp(1.8rem, 4vw, 2.9rem); line-height: 1.12; margin: 0 0 var(--space-4); font-weight: 800; letter-spacing: -.02em; }
.hero__subtitle { color: var(--color-text-muted); font-size: 1.1rem; margin: 0; max-width: 34em; }
.hero__stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
.hero-stat { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); text-align: center; box-shadow: var(--shadow-sm); }
.hero-stat span { display: block; font-size: 1.6rem; font-weight: 800; color: var(--color-primary); }
.hero-stat { color: var(--color-text-muted); font-size: .8em; text-transform: uppercase; letter-spacing: .05em; }

/* ============ Category chips ============ */
.categories-strip { padding-bottom: var(--space-5); }
.cat-chips { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.cat-chip { display: inline-flex; align-items: center; gap: 8px; padding: 10px 16px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-full); color: var(--color-text); font-weight: 500; transition: transform .15s, box-shadow .15s, border-color .15s; }
.cat-chip:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--color-primary); color: var(--color-text); }
.cat-chip em { background: var(--color-accent); color: #fff; border-radius: var(--radius-full); font-style: normal; font-size: .75em; padding: 2px 8px; }

/* ============ Cards grid ============ */
.section-page, .news-section { padding: var(--space-6) 0 var(--space-7); }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-5); }
.section-head h2 { margin: 0; font-size: 1.5rem; font-weight: 800; }
.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5); }
.card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; display: flex; flex-direction: column; transition: transform .2s, box-shadow .2s; box-shadow: var(--shadow-sm); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card-media img { width: 100%; aspect-ratio: 16/9; object-fit: cover; filter: blur(0); }
.card-media img[data-lazy] { filter: blur(8px); transform: scale(1.02); }
.card-body { padding: var(--space-4) var(--space-5) var(--space-5); display: flex; flex-direction: column; flex: 1; }
.card-meta { display: flex; align-items: center; gap: 10px; font-size: .82em; color: var(--color-text-muted); margin-bottom: var(--space-3); }
.badge { display: inline-block; padding: 3px 10px; border-radius: var(--radius-full); font-size: .75em; font-weight: 600; background: color-mix(in srgb, var(--color-accent) 12%, transparent); color: var(--color-accent); }
.badge--tag { background: color-mix(in srgb, var(--color-primary) 10%, transparent); color: var(--color-primary); }
.badge--published, .badge--active, .badge--approved { background: color-mix(in srgb, var(--color-success) 14%, transparent); color: var(--color-success); }
.badge--draft, .badge--pending, .badge--blocked { background: color-mix(in srgb, var(--color-warning) 14%, transparent); color: var(--color-warning); }
.badge--archived, .badge--revoked { background: color-mix(in srgb, var(--color-text-muted) 14%, transparent); color: var(--color-text-muted); }
.card-title { margin: 0 0 8px; font-size: 1.18rem; line-height: 1.3; }
.card-title a { color: var(--color-text); }
.card-title a:hover { color: var(--color-primary); }
.card-excerpt { color: var(--color-text-muted); margin: 0 0 var(--space-4); flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-footer { display: flex; align-items: center; justify-content: space-between; }
.link-more { font-weight: 600; font-size: .9em; }
.empty-state { text-align: center; color: var(--color-text-muted); padding: var(--space-7) 0; }
.page-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; margin: var(--space-5) 0 var(--space-3); }
.page-lead { color: var(--color-text-muted); max-width: 42em; margin: 0 0 var(--space-6); }

/* ============ Pagination ============ */
.pagination { display: flex; align-items: center; gap: var(--space-4); justify-content: center; margin-top: var(--space-6); }
.page-indicator { color: var(--color-text-muted); }

/* ============ Article page ============ */
.breadcrumbs { display: flex; gap: 8px; align-items: center; font-size: .85em; color: var(--color-text-muted); padding: var(--space-5) 0 var(--space-3); flex-wrap: wrap; }
.article-page { padding-bottom: var(--space-8); }
.article-head { max-width: 820px; margin: 0 auto var(--space-6); text-align: center; }
.article-title { font-size: clamp(1.7rem, 3.4vw, 2.6rem); line-height: 1.15; font-weight: 800; margin: 0 0 var(--space-4); }
.article-lead { color: var(--color-text-muted); font-size: 1.13rem; margin: 0 0 var(--space-4); }
.article-meta { display: flex; align-items: center; gap: 14px; justify-content: center; flex-wrap: wrap; font-size: .85em; color: var(--color-text-muted); }
.avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--color-accent); color: #fff; display: grid; place-items: center; font-weight: 700; }
.article-layout { display: grid; grid-template-columns: 240px 1fr; gap: var(--space-6); align-items: start; max-width: 1000px; margin: 0 auto; }
.toc { position: sticky; top: calc(var(--header-h) + 20px); font-size: .85em; }
.toc-title { font-weight: 700; margin-bottom: 8px; color: var(--color-text); }
.toc a { display: block; padding: 5px 0 5px 12px; border-left: 2px solid var(--color-border); color: var(--color-text-muted); }
.toc a:hover, .toc a.is-active { color: var(--color-primary); border-left-color: var(--color-primary); }
.toc a.lvl-2 { padding-left: 24px; }
.article-hero-img { margin: 0 0 var(--space-5); border-radius: var(--radius-md); overflow: hidden; }
.prose { font-size: 1.06rem; }
.prose h2 { font-size: 1.55rem; margin: var(--space-6) 0 var(--space-3); font-weight: 800; scroll-margin-top: calc(var(--header-h) + 20px); }
.prose h3 { font-size: 1.25rem; margin: var(--space-5) 0 var(--space-2); font-weight: 700; scroll-margin-top: calc(var(--header-h) + 20px); }
.prose p { margin: 0 0 var(--space-4); }
.prose blockquote { border-left: 3px solid var(--color-primary); margin: var(--space-5) 0; padding: var(--space-3) var(--space-5); background: color-mix(in srgb, var(--color-primary) 6%, transparent); border-radius: 0 var(--radius-md) var(--radius-md) 0; font-style: italic; }
.prose ul, .prose ol { padding-left: var(--space-5); margin-bottom: var(--space-4); }
.prose img { border-radius: var(--radius-md); margin: var(--space-4) 0; }
.tag-row { display: flex; gap: 10px; flex-wrap: wrap; margin: var(--space-5) 0; }
.share-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; padding: var(--space-4) 0; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); margin-bottom: var(--space-6); }
.share-btn { padding: 8px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-sm); font-size: .88em; cursor: pointer; background: var(--color-surface); color: var(--color-text); }
.share-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.comments { margin-top: var(--space-6); }
.comment { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); margin-bottom: var(--space-3); }
.comment time { display: block; font-size: .8em; }
.comment p { margin: 8px 0 0; }
.comment-form { display: grid; gap: var(--space-3); margin-top: var(--space-4); }
.comment-form input, .comment-form textarea { font: inherit; padding: 10px 14px; border-radius: var(--radius-sm); border: 1px solid var(--color-border); background: var(--color-surface); color: var(--color-text); width: 100%; }
.comment-form button { justify-self: start; }
.form-ok { color: var(--color-success); font-size: .9em; }
.related { margin-top: var(--space-7); }
.related h2 { margin-bottom: var(--space-4); }

/* ============ Footer ============ */
.site-footer { background: var(--color-surface); border-top: 1px solid var(--color-border); padding-top: var(--space-6); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 2fr 1fr; gap: var(--space-6); padding-bottom: var(--space-5); }
.footer-links { display: grid; gap: 8px; align-content: start; }
.footer-links a, .footer-contacts { color: var(--color-text-muted); font-size: .92em; }
.social-links { display: flex; gap: 14px; margin-top: var(--space-2); }
.footer-bottom { display: flex; justify-content: space-between; border-top: 1px solid var(--color-border); padding: var(--space-4) 0 var(--space-5); color: var(--color-text-muted); font-size: .85em; }

/* ============ Error / forms ============ */
.error-404 { text-align: center; padding: var(--space-8) 0; }
.error-code { font-size: 6rem; font-weight: 800; color: var(--color-primary); line-height: 1; }
.auth-box { max-width: 420px; margin: var(--space-7) auto; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-6); box-shadow: var(--shadow-md); }
.form-stack { display: grid; gap: var(--space-4); }
.form-stack label { display: grid; gap: 6px; font-weight: 500; font-size: .92em; }
.form-stack input, .form-stack select, .form-stack textarea { font: inherit; padding: 10px 14px; border-radius: var(--radius-sm); border: 1px solid var(--color-border); background: var(--color-surface); color: var(--color-text); }
.form-stack input:focus, .form-stack select:focus, .form-stack textarea:focus { outline: none; border-color: var(--color-primary); }
.check { display: flex; align-items: center; gap: 8px; font-weight: 400; }
.check input { width: auto; }
.form-error, .form-ok { font-size: .9em; }
.form-error { color: var(--color-danger); }
.form-actions { display: flex; gap: var(--space-3); justify-content: flex-end; margin-top: var(--space-2); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.editor { font-family: var(--font-mono); font-size: .9em; }

/* ============ Cookie banner ============ */
.cookie-banner { position: fixed; bottom: var(--space-4); left: var(--space-4); right: var(--space-4); max-width: 640px; margin: 0 auto; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); box-shadow: var(--shadow-lg); padding: var(--space-4); z-index: 90; display: flex; flex-direction: column; gap: var(--space-3); transform: translateY(200%); transition: transform .4s ease; }
.cookie-banner.is-visible { transform: translateY(0); }
.cookie-banner p { margin: 0; font-size: .9em; }
.cookie-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* ============ Reading progress & to-top ============ */
.reading-progress { position: fixed; top: 0; left: 0; height: 3px; background: var(--color-primary); width: 0; z-index: 100; transition: width .1s linear; }
.to-top { position: fixed; bottom: var(--space-5); right: var(--space-5); width: 44px; height: 44px; border-radius: 50%; border: none; background: var(--color-primary); color: #fff; font-size: 1.2rem; cursor: pointer; opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s; box-shadow: var(--shadow-lg); z-index: 80; }
.to-top.is-visible { opacity: 1; pointer-events: auto; }
.to-top:hover { transform: translateY(-2px); }

/* ============ Admin ============ */
.admin-body { background: var(--color-bg); }
.admin-shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.admin-side { background: var(--color-surface); border-right: 1px solid var(--color-border); padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-4); position: sticky; top: 0; height: 100vh; }
.admin-brand a { font-weight: 800; font-size: 1.05em; color: var(--color-text); }
.admin-nav { display: grid; gap: 2px; }
.admin-nav a { padding: 9px 12px; border-radius: var(--radius-sm); color: var(--color-text-muted); font-weight: 500; }
.admin-nav a:hover { color: var(--color-text); background: color-mix(in srgb, var(--color-primary) 8%, transparent); }
.admin-side-foot { margin-top: auto; display: grid; gap: 8px; }
.admin-main { padding: var(--space-5) var(--space-6) var(--space-8); }
.admin-topbar h1 { margin: 0 0 var(--space-4); font-size: 1.4rem; font-weight: 800; }
.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: var(--space-4); font-size: .92em; }
.alert-ok { background: color-mix(in srgb, var(--color-success) 12%, transparent); color: var(--color-success); }
.alert-err { background: color-mix(in srgb, var(--color-danger) 12%, transparent); color: var(--color-danger); }
.toolbar { display: flex; gap: var(--space-3); align-items: center; margin-bottom: var(--space-4); flex-wrap: wrap; }
.inline-form { display: flex; gap: 8px; align-items: center; }
.inline-form input, .inline-form select, .inline-form button { font: inherit; padding: 8px 12px; border-radius: var(--radius-sm); border: 1px solid var(--color-border); background: var(--color-surface); color: var(--color-text); }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: var(--space-4); margin-bottom: var(--space-5); }
.stat-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); font-size: .85em; color: var(--color-text-muted); box-shadow: var(--shadow-sm); }
.stat-num { display: block; font-size: 1.8rem; font-weight: 800; color: var(--color-text); margin-bottom: 4px; }
.stat-card.is-warn { border-color: var(--color-warning); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
.panel { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-5); box-shadow: var(--shadow-sm); }
.panel h2 { margin: 0 0 var(--space-4); font-size: 1.1rem; }
.table { width: 100%; border-collapse: collapse; font-size: .92em; }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--color-border); vertical-align: middle; }
.table th { color: var(--color-text-muted); font-weight: 600; font-size: .82em; text-transform: uppercase; letter-spacing: .04em; }
.row-actions { display: flex; gap: 6px; align-items: center; justify-content: flex-end; }
.perm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 20px; margin-bottom: var(--space-4); }
.tag-manager { display: flex; gap: 10px; flex-wrap: wrap; }
.media-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--space-4); }
.media-item { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; margin: 0; }
.media-item img { width: 100%; aspect-ratio: 3/2; object-fit: cover; }
.media-item figcaption { padding: var(--space-3); }
.media-item code { font-size: .72em; word-break: break-all; display: block; margin-bottom: 8px; color: var(--color-text-muted); }
.log-row { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-sm); padding: 10px 14px; margin-bottom: 8px; font-size: .9em; }
.log-row.is-high, .log-row.is-critical { border-left: 3px solid var(--color-danger); }
.log-details { margin-top: 4px; }
.log-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.log-list li { font-size: .88em; padding: 8px 10px; border-radius: var(--radius-sm); background: var(--color-bg); border-left: 3px solid var(--color-border); }
.log-list li.ok { border-left-color: var(--color-success); }
.log-list li.fail { border-left-color: var(--color-danger); }

/* ============ Breakpoints (mobile-first overrides) ============ */
@media (min-width: 768px) and (max-width: 1023px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .toc { position: static; }
  .hero .container { grid-template-columns: 1fr; }
}
@media (max-width: 767px) {
  .cards-grid { grid-template-columns: 1fr; }
  .hero .container { grid-template-columns: 1fr; }
  .hero__stats { grid-template-columns: repeat(3, 1fr); }
  .main-nav { display: none; }
  .header-inner { gap: var(--space-3); }
  .search-form input { width: 120px; }
  .search-form input:focus { width: 150px; }
  .article-layout { grid-template-columns: 1fr; }
  .toc { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .perm-grid { grid-template-columns: 1fr; }
  .admin-shell { grid-template-columns: 1fr; }
  .admin-side { position: static; height: auto; }
}