/* ==========================================================================
   AI News PL — design tokens
   ========================================================================== */
:root {
  --bg: #0b1220;
  --bg-elevated: #111b2e;
  --bg-card: #0f1a2c;
  --border: #223049;
  --border-soft: #1a2438;
  --text: #e9edf2;
  --text-muted: #8792a3;
  --text-faint: #5c6a80;
  --accent: #00c2d1;
  --accent-dim: #0a4a52;
  --accent-2: #ff8a3d;
  --accent-2-dim: #4a2f16;
  --radius: 3px;
  --maxw: 1240px;

  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(var(--border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.25;
  mask-image: radial-gradient(ellipse 80% 50% at 50% 0%, #000 0%, transparent 70%);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(11, 18, 32, 0.92);
  backdrop-filter: blur(8px);
  z-index: 50;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}
.brand-mark {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
}
.brand small {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: 0.08em;
}
.nav-tags {
  display: flex;
  gap: 22px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}
.nav-tags a { transition: color 0.15s; }
.nav-tags a:hover, .nav-tags a.is-active { color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--border);
}
.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.hero-eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px 2px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 50% { opacity: 0.35; } }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.15;
  margin: 0 0 14px;
  max-width: 18ch;
  font-weight: 600;
}
.hero p {
  color: var(--text-muted);
  max-width: 56ch;
  margin: 0;
  font-size: 1.02rem;
}

/* ---------- Layout with ad rails ---------- */
.layout {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr) 160px;
  gap: 28px;
  padding: 40px 0 80px;
  align-items: start;
}
.rail {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.ad-slot {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 16px 0;
}
.ad-slot.small { min-height: 220px; }

/* ---------- Article grid ---------- */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin: 0 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s, transform 0.15s;
  display: flex;
  flex-direction: column;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.card-media {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--bg-elevated);
}
.card-media svg { width: 100%; height: 100%; transition: transform 0.25s; }
.card:hover .card-media svg { transform: scale(1.03); }
.card-media::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1.5px solid var(--accent);
  opacity: 0;
  transform: scale(0.96);
  transition: opacity 0.15s, transform 0.15s;
  pointer-events: none;
}
.card-media::after {
  content: attr(data-tag);
  position: absolute;
  left: 10px;
  bottom: 10px;
  background: var(--accent);
  color: #04191c;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  padding: 2px 7px;
  letter-spacing: 0.03em;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.15s, transform 0.15s;
}
.card:hover .card-media::before,
.card:hover .card-media::after {
  opacity: 1;
  transform: none;
}
.card-body {
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.card-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-faint);
  display: flex;
  gap: 10px;
  align-items: center;
}
.card-meta .cat {
  color: var(--accent-2);
}
.card h3 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  line-height: 1.35;
  margin: 0;
  font-weight: 600;
}
.card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
  flex: 1;
}
.card-source {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-faint);
  padding-top: 8px;
  border-top: 1px solid var(--border-soft);
}

/* ---------- Article page ---------- */
.article-header { padding: 40px 0 20px; }
.back-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 24px;
}
.article-header .card-meta { margin-bottom: 14px; }
.article-header h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  line-height: 1.2;
  margin: 0 0 16px;
  max-width: 24ch;
}
.article-hero-media {
  aspect-ratio: 21/9;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 24px 0 8px;
  background: var(--bg-elevated);
}
.article-hero-media svg { width: 100%; height: 100%; }
.article-body {
  max-width: 70ch;
  font-size: 1.05rem;
}
.article-body p { margin: 0 0 20px; color: #d3d9e2; }
.source-box {
  margin: 32px 0;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  font-size: 0.88rem;
  color: var(--text-muted);
  max-width: 70ch;
}
.source-box a { color: var(--accent); }
.article-tags {
  display: flex;
  gap: 8px;
  margin: 28px 0;
  flex-wrap: wrap;
}
.tag-pill {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text-muted);
}

/* ---------- Banner ad (horizontal, between sections) ---------- */
.ad-banner {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 36px 0;
}

/* ---------- Hero grid (featured + secondary) ---------- */
.hero-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 20px;
  padding: 32px 0 0;
}
.hero-feature {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.hero-feature .card-media { aspect-ratio: 16/11; }
.hero-feature .card-body { padding: 22px 24px 26px; }
.hero-feature h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  line-height: 1.28;
  margin: 0;
  font-weight: 600;
}
.hero-side {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.hero-side-item {
  display: flex;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  flex: 1;
  align-items: center;
}
.hero-side-item .thumb {
  width: 84px;
  height: 84px;
  flex-shrink: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elevated);
}
.hero-side-item .thumb svg { width: 100%; height: 100%; }
.hero-side-item h3 {
  font-family: var(--font-display);
  font-size: 0.92rem;
  line-height: 1.3;
  margin: 0 0 4px;
  font-weight: 600;
}
.hero-side-item .card-meta { margin-bottom: 4px; }

/* ---------- Category sections ---------- */
.category-section { margin: 44px 0; }
.category-heading {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.category-heading::before {
  content: "";
  width: 4px;
  height: 18px;
  background: var(--accent);
  display: inline-block;
}
.category-heading h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 0;
  font-weight: 600;
}
.category-heading .see-all {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- More-news continuous list ---------- */
.more-list { margin: 44px 0 0; }
.more-list-item {
  display: flex;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border-soft);
  align-items: center;
}
.more-list-item .thumb {
  width: 96px;
  height: 64px;
  flex-shrink: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-elevated);
}
.more-list-item .thumb svg { width: 100%; height: 100%; }
.more-list-item h4 {
  font-family: var(--font-display);
  font-size: 0.94rem;
  line-height: 1.3;
  margin: 0 0 4px;
  font-weight: 600;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .rail { display: none; }
  .grid { grid-template-columns: 1fr; }
  .hero-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .hero-side-item { flex-direction: row; }
  .more-list-item .thumb { width: 72px; height: 52px; }
}
@media (max-width: 560px) {
  .nav-tags { display: none; }
  .hero { padding: 36px 0 28px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* Focus visibility */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}