/* ============================================================
   AI Design Trends 2026 — Shared Stylesheet
   ============================================================ */

/* ── Tokens ─────────────────────────────────────────────────── */
:root {
  --dark:       #0F0F1A;
  --dark2:      #1A1A2E;
  --accent:     #4F46E5;
  --accent2:    #818CF8;
  --accent-lt:  #EEF2FF;
  --mid:        #374151;
  --muted:      #6B7280;
  --rule:       #E5E7EB;
  --light:      #F9FAFB;
  --white:      #FFFFFF;
  --success:    #10B981;
  --nav-h:      64px;
  --max-w:      1080px;
  --radius:     10px;
  --shadow:     0 4px 24px rgba(0,0,0,0.08);
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--white);
  color: var(--mid);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Navigation ─────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
}
.nav-inner {
  max-width: var(--max-w);
  width: 100%;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  font-size: 13px;
  font-weight: 700;
  color: var(--dark2);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-logo-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  flex-wrap: wrap;
}
.nav-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-lt);
  text-decoration: none;
}
.nav-badge {
  font-size: 10px;
  font-weight: 700;
  background: var(--accent);
  color: white;
  padding: 2px 7px;
  border-radius: 20px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav-cta {
  background: #FF6B35 !important;
  color: white !important;
  font-size: 13px !important;
  font-weight: 600 !important;
  padding: 8px 16px !important;
  border-radius: 7px !important;
  transition: background 0.15s !important;
  text-decoration: none !important;
  margin-left: 16px !important;
}
.nav-cta:hover { background: #E85A25 !important; }

/* ── Page wrapper ────────────────────────────────────────────── */
.page { max-width: var(--max-w); margin: 0 auto; padding: 0 32px; }

/* ── Hero (index) ────────────────────────────────────────────── */
.hero {
  background: var(--dark2);
  min-height: 92vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 60% 40%, rgba(79,70,229,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.hero-accent-bar {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent2) 100%);
}
.hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 32px;
  position: relative;
  z-index: 1;
}
.hero-eyebrow {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent2);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-eyebrow::before {
  content: "";
  width: 24px; height: 2px;
  background: var(--accent2);
  display: block;
}
.hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero h1 span { color: var(--accent2); }
.hero-sub {
  font-size: 18px;
  color: #C7D2FE;
  margin-bottom: 12px;
  font-weight: 400;
  max-width: 540px;
}
.hero-meta {
  font-size: 12px;
  color: #6B7280;
  margin-bottom: 52px;
}
.hero-stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 52px;
}
.stat-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 20px 24px;
  min-width: 160px;
  transition: border-color 0.2s, background 0.2s;
}
.stat-card:hover {
  border-color: rgba(79,70,229,0.4);
  background: rgba(79,70,229,0.08);
}
.stat-num {
  font-size: 32px;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.1;
  display: block;
}
.stat-label {
  font-size: 11px;
  color: #FFFFFF;
  margin-top: 4px;
  line-height: 1.4;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #FF6B35;
  color: white;
  font-size: 14px;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: 8px;
  transition: background 0.15s, transform 0.15s;
}
.hero-cta:hover {
  background: #E85A25;
  text-decoration: none;
  transform: translateY(-1px);
}

/* ── Section nav cards ───────────────────────────────────────── */
.section-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  padding: 60px 0;
}
.section-card {
  background: var(--light);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
  color: inherit;
}
.section-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  text-decoration: none;
}
.section-card-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.section-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--dark2);
  line-height: 1.3;
}
.section-card-desc {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

/* ── Page headers ────────────────────────────────────────────── */
.page-hero {
  background: var(--dark2);
  padding: 72px 0 52px;
  margin-bottom: 52px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 20% 50%, rgba(79,70,229,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero-bar {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent2) 100%);
}
.page-hero-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
  position: relative;
  z-index: 1;
}
.page-hero-eyebrow {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent2);
  margin-bottom: 12px;
}
.page-hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 12px;
}
.page-hero p {
  font-size: 16px;
  color: #C7D2FE;
  max-width: 560px;
}

/* ── Content typography ──────────────────────────────────────── */
.content h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--dark2);
  margin: 52px 0 8px;
  letter-spacing: -0.01em;
  scroll-margin-top: calc(var(--nav-h) + 16px);
}
.content h2:first-child { margin-top: 0; }
.content h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  margin: 28px 0 8px;
}
.content p {
  font-size: 15px;
  color: var(--mid);
  margin-bottom: 14px;
  max-width: 680px;
}
.content hr {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 40px 0;
}

/* ── Lists ───────────────────────────────────────────────────── */
.content ul {
  list-style: none;
  padding: 0;
  margin: 12px 0 20px;
}
.content ul li {
  padding: 6px 0 6px 22px;
  position: relative;
  font-size: 14.5px;
  color: var(--mid);
  line-height: 1.55;
}
.content ul li::before {
  content: "▸";
  position: absolute;
  left: 4px;
  color: var(--accent);
  font-size: 10px;
  top: 9px;
}

/* ── Exec summary bullets ────────────────────────────────────── */
.exec-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.exec-list li {
  padding: 14px 18px 14px 56px;
  border-bottom: 1px solid var(--rule);
  position: relative;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mid);
}
.exec-list li:first-child { border-top: 1px solid var(--rule); }
.exec-list li:last-child { border-bottom: none; }
.exec-list .num {
  position: absolute;
  left: 16px;
  top: 14px;
  width: 26px; height: 26px;
  background: var(--accent-lt);
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Callout ─────────────────────────────────────────────────── */
.callout {
  background: var(--accent-lt);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
  margin: 20px 0;
  font-size: 14.5px;
  color: var(--dark2);
  line-height: 1.6;
}
.callout strong { color: var(--accent); }

/* ── Tables ──────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; margin: 20px 0 28px; border-radius: var(--radius); border: 1px solid var(--rule); }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
thead tr { background: var(--accent-lt); }
thead th {
  padding: 12px 16px;
  text-align: left;
  color: var(--accent);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}
tbody tr:nth-child(odd)  { background: var(--white); }
tbody tr:nth-child(even) { background: var(--light); }
tbody td {
  padding: 10px 16px;
  border-top: 1px solid var(--rule);
  vertical-align: top;
  line-height: 1.5;
}
tbody td:first-child { font-weight: 600; color: var(--dark2); }

/* ── Charts ──────────────────────────────────────────────────── */
.chart-block {
  background: var(--light);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 28px;
  margin: 28px 0;
}
.chart-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--dark2);
  margin-bottom: 20px;
}
.chart-caption {
  font-size: 11.5px;
  color: var(--muted);
  font-style: italic;
  margin-top: 14px;
  text-align: center;
}

/* Horizontal bar chart */
.hbar { display: flex; flex-direction: column; gap: 10px; }
.hbar-row { display: flex; align-items: center; gap: 12px; }
.hbar-label { font-size: 12.5px; color: var(--mid); min-width: 160px; text-align: right; flex-shrink: 0; }
.hbar-track { flex: 1; background: #E0E7FF; border-radius: 4px; height: 20px; overflow: hidden; }
.hbar-fill { height: 100%; border-radius: 4px; background: var(--accent); }
.hbar-fill.dim { background: var(--accent2); }
.hbar-val { font-size: 12px; font-weight: 700; color: var(--mid); min-width: 36px; }

/* Comparison bars */
.cbar { display: flex; flex-direction: column; gap: 18px; }
.cbar-group-label { font-size: 13px; font-weight: 700; color: var(--dark2); margin-bottom: 6px; }
.cbar-row { display: flex; align-items: center; gap: 10px; }
.cbar-year { font-size: 11px; color: var(--muted); min-width: 36px; }
.cbar-track { flex: 1; background: #E0E7FF; border-radius: 3px; height: 14px; overflow: hidden; }
.cbar-fill-24 { height: 100%; background: #C7D2FE; border-radius: 3px; }
.cbar-fill-26 { height: 100%; background: var(--accent); border-radius: 3px; }
.cbar-val { font-size: 11px; font-weight: 700; color: var(--mid); min-width: 32px; }

/* Skills chart */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; margin: 12px 0; }
.skill-card { background: var(--white); border: 1px solid var(--rule); border-radius: 8px; padding: 14px 16px; }
.skill-name { font-size: 12.5px; font-weight: 700; color: var(--dark2); margin-bottom: 10px; }
.skill-row { display: flex; align-items: center; gap: 8px; margin-bottom: 5px; }
.skill-year { font-size: 10.5px; color: var(--muted); min-width: 32px; }
.skill-track { flex: 1; background: #E5E7EB; border-radius: 3px; height: 8px; overflow: hidden; }
.skill-bar-24 { height: 100%; background: #C7D2FE; border-radius: 3px; }
.skill-bar-26 { height: 100%; background: var(--accent); border-radius: 3px; }
.skill-score { font-size: 10px; color: var(--muted); min-width: 26px; }
.skill-delta { font-size: 10.5px; font-weight: 700; color: var(--success); }

/* Chart legend */
.chart-legend { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 16px; }
.legend-item { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }
.legend-dot { width: 10px; height: 10px; border-radius: 2px; flex-shrink: 0; }

/* ── Trend cards (trends page) ───────────────────────────────── */
.trend-section {
  padding: 52px 0;
  border-bottom: 1px solid var(--rule);
  scroll-margin-top: calc(var(--nav-h) + 16px);
}
.trend-section:last-child { border-bottom: none; }
.trend-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-lt);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
}
.trend-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--dark2);
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.trend-intro {
  font-size: 15.5px;
  color: var(--mid);
  margin-bottom: 20px;
  max-width: 680px;
  line-height: 1.65;
}

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  background: var(--dark);
  color: #6B7280;
  padding: 48px 0;
  margin-top: 80px;
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
}
.footer-brand {
  font-size: 13px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 6px;
}
.footer-sub { font-size: 12px; }
.footer-links { display: flex; flex-direction: column; gap: 6px; }
.footer-links a { font-size: 12px; color: #6B7280; }
.footer-links a:hover { color: var(--accent2); }
.footer-updated {
  font-size: 11px;
  color: #4B5563;
  margin-top: 24px;
  border-top: 1px solid #1F2937;
  padding-top: 16px;
  max-width: var(--max-w);
  margin: 24px auto 0;
  padding-left: 32px;
  padding-right: 32px;
}

/* ── Sources page ────────────────────────────────────────────── */
.source-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
  display: flex;
  gap: 16px;
}
.source-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  min-width: 28px;
  padding-top: 2px;
}
.source-body {}
.source-org { font-size: 13px; font-weight: 700; color: var(--dark2); }
.source-title { font-size: 13.5px; color: var(--mid); margin: 2px 0; }
.source-url { font-size: 11.5px; color: var(--muted); word-break: break-all; }
.source-url a { color: var(--accent); }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 680px) {
  .nav-links { display: none; }
  .hero-stats { flex-direction: column; }
  .stat-card { min-width: unset; }
  .hbar-label { min-width: 110px; font-size: 11px; }
  .page { padding: 0 16px; }
  .page-hero-inner, .hero-inner { padding: 0 16px; }
  .footer-inner { flex-direction: column; }
}

/* ── Update badge ────────────────────────────────────────────── */
.update-ribbon {
  background: var(--success);
  color: white;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 16px;
}