/* ============================================================
   use-cases.css — Ultra-modern use cases page
   ============================================================ */

:root {
  --bg: oklch(0.975 0.006 85);
  --ink: oklch(0.18 0.014 60);
  --muted: oklch(0.46 0.02 60);
  --faint: oklch(0.60 0.02 60);
  --panel: oklch(0.955 0.008 85);
  --panel-2: oklch(0.925 0.010 80);
  --line: oklch(0.88 0.010 75);
  --accent: oklch(0.56 0.19 28);
  --accent-soft: oklch(0.56 0.19 28 / 0.08);
  --serif: "Fraunces", "Iowan Old Style", Georgia, serif;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --shadow: rgba(0,0,0,0.12);
  --shadow-lg: rgba(0,0,0,0.18);
  --card-bg: oklch(0.99 0.004 85);
  --card-hover: oklch(1.0 0 0);
  --gradient-start: oklch(0.96 0.015 28);
  --gradient-end: oklch(0.97 0.010 85);
  --pill-company: oklch(0.45 0.12 250);
  --pill-company-bg: oklch(0.93 0.03 250);
  --pill-opportunity: oklch(0.50 0.14 150);
  --pill-opportunity-bg: oklch(0.93 0.03 150);
  --autocomplete-bg: oklch(0.99 0.002 85);
  --autocomplete-active: oklch(0.95 0.02 28);
}
[data-theme="dark"] {
  --bg: oklch(0.16 0.010 60);
  --ink: oklch(0.94 0.010 85);
  --muted: oklch(0.72 0.018 75);
  --faint: oklch(0.54 0.018 70);
  --panel: oklch(0.21 0.012 60);
  --panel-2: oklch(0.26 0.014 60);
  --line: oklch(0.33 0.014 60);
  --accent: oklch(0.74 0.16 52);
  --accent-soft: oklch(0.74 0.16 52 / 0.12);
  --shadow: rgba(0,0,0,0.35);
  --shadow-lg: rgba(0,0,0,0.55);
  --card-bg: oklch(0.20 0.011 60);
  --card-hover: oklch(0.24 0.014 60);
  --gradient-start: oklch(0.22 0.018 28);
  --gradient-end: oklch(0.18 0.012 60);
  --pill-company: oklch(0.65 0.12 250);
  --pill-company-bg: oklch(0.28 0.04 250);
  --pill-opportunity: oklch(0.62 0.14 150);
  --pill-opportunity-bg: oklch(0.28 0.04 150);
  --autocomplete-bg: oklch(0.22 0.012 60);
  --autocomplete-active: oklch(0.30 0.03 28);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }
em { font-style: italic; }
.wrap { max-width: 1260px; margin: 0 auto; padding: 0 24px; }

/* ---- header ---- */
header.site {
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky; top: 0; z-index: 30;
  border-bottom: 1px solid var(--line);
}
.bar { display: flex; align-items: center; gap: 18px; padding: 12px 24px; }
.logo { font: 600 14px var(--mono); display: inline-flex; align-items: center; gap: 6px; }
.logo b { background: var(--accent); color: var(--bg); padding: 1px 5px; border-radius: 4px; font-family: var(--mono); }
.nav-links { display: flex; gap: 4px; margin-left: 8px; }
.nav-link {
  font: 12px var(--mono); letter-spacing: .04em; text-transform: uppercase;
  padding: 6px 14px; border-radius: 8px; color: var(--muted);
  transition: color .15s, background .15s;
}
.nav-link:hover { color: var(--ink); text-decoration: none; background: var(--accent-soft); }
.nav-link.active { color: var(--ink); background: var(--panel-2); font-weight: 600; }
.src { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.file-btn {
  cursor: pointer; border: 1px solid var(--line); background: var(--panel);
  padding: 7px 12px; border-radius: 8px; font: 13px var(--mono); color: var(--muted);
  transition: border-color .15s, color .15s;
}
.file-btn:hover { border-color: var(--accent); color: var(--ink); }
.lang-toggle {
  cursor: pointer; border: 1px solid var(--accent); background: var(--accent-soft);
  padding: 6px 14px; border-radius: 8px; font: 600 12px var(--mono);
  color: var(--accent); letter-spacing: .08em;
  transition: background .15s, color .15s;
}
.lang-toggle:hover { background: var(--accent); color: var(--bg); }

/* ---- hero ---- */
.hero { padding: 50px 0 0; }
.hero .wrap {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 16px; padding: 44px 40px 36px;
  border: 1px solid var(--line);
}
.eyebrow {
  margin: 0 0 12px; font: 11px var(--mono);
  letter-spacing: .16em; text-transform: uppercase; color: var(--faint);
}
.hero h1 {
  margin: 0; font: 400 clamp(32px, 5.5vw, 56px)/1.04 var(--serif);
  letter-spacing: -.5px;
}
.hero h1 em { font-weight: 500; color: var(--accent); }
.lede { color: var(--muted); margin: 16px 0 28px; font-size: 15px; max-width: 600px; }
.stats { display: flex; flex-wrap: wrap; gap: 0; }
.stat {
  padding: 16px 28px 18px 0; margin-right: 28px;
  border-right: 1px solid var(--line);
}
.stat:last-child { border-right: 0; }
.stat b { display: block; font: 400 32px/1 var(--serif); }
.stat span {
  font: 10px var(--mono); letter-spacing: .1em;
  text-transform: uppercase; color: var(--faint);
}

/* ---- controls ---- */
.controls {
  position: sticky; top: 53px; z-index: 25;
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.controls .wrap {
  display: flex; gap: 10px; flex-wrap: wrap; align-items: center;
}
.search-wrap { position: relative; flex: 1 1 260px; min-width: 220px; }
.controls input[type=search],
.controls select {
  background: var(--panel); color: var(--ink);
  border: 1px solid var(--line); border-radius: 10px;
  padding: 9px 12px; font: 13px var(--sans);
  transition: border-color .15s, box-shadow .15s;
}
.controls input[type=search]:focus,
.controls select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.controls input[type=search] { width: 100%; }
.controls select { cursor: pointer; min-width: 160px; }
.count {
  margin-left: auto; font: 11px var(--mono); color: var(--faint);
  white-space: nowrap;
}

/* ---- autocomplete ---- */
.autocomplete {
  position: absolute; top: 100%; left: 0; right: 0;
  background: var(--autocomplete-bg);
  border: 1px solid var(--line); border-radius: 10px;
  margin-top: 4px; max-height: 340px; overflow-y: auto;
  box-shadow: 0 8px 30px var(--shadow-lg);
  z-index: 50;
}
.autocomplete[hidden] { display: none; }
.ac-item {
  padding: 10px 14px; cursor: pointer;
  border-bottom: 1px solid color-mix(in oklab, var(--line) 50%, transparent);
  transition: background .1s;
}
.ac-item:last-child { border-bottom: 0; }
.ac-item:hover,
.ac-item.active { background: var(--autocomplete-active); }
.ac-title { font: 500 13px var(--sans); color: var(--ink); }
.ac-meta {
  font: 10px var(--mono); color: var(--faint);
  letter-spacing: .04em; text-transform: uppercase; margin-top: 2px;
}
.ac-highlight { color: var(--accent); font-weight: 600; }

/* ---- main ---- */
main { padding: 28px 0 80px; min-height: 50vh; }
.loading { color: var(--muted); padding: 50px 0; font: 13px var(--mono); }
.empty { color: var(--muted); padding: 50px 0; text-align: center; font-size: 15px; }

/* ---- card grid ---- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

/* ---- card ---- */
.card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 22px 24px 20px;
  cursor: default;
  position: relative;
  overflow: hidden;
  transition: transform .18s cubic-bezier(.22,1,.36,1),
              border-color .18s,
              box-shadow .18s;
}
.card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), color-mix(in oklab, var(--accent) 40%, var(--pill-opportunity)));
  opacity: 0; transition: opacity .18s;
}
.card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 28px var(--shadow), 0 0 0 1px var(--accent-soft);
}
.card:hover::before { opacity: 1; }

.card-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 12px; margin-bottom: 10px;
}
.card-title {
  margin: 0; font: 600 17px/1.25 var(--serif);
  color: var(--ink); flex: 1; min-width: 0;
}
.card-title::after {
  content: ""; display: block; clear: both;
}

.card-pills { display: flex; gap: 6px; flex-shrink: 0; flex-wrap: wrap; }
.pill {
  font: 9px/1 var(--mono); letter-spacing: .05em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 999px; white-space: nowrap; font-weight: 600;
}
.pill-company {
  color: var(--pill-company); background: var(--pill-company-bg);
}
.pill-opportunity {
  color: var(--pill-opportunity); background: var(--pill-opportunity-bg);
}

.card-desc {
  color: var(--muted); font-size: 13.5px; line-height: 1.55;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden; margin: 0;
}

.card-footer {
  display: flex; align-items: center; gap: 8px;
  margin-top: 14px; padding-top: 12px;
  border-top: 1px solid color-mix(in oklab, var(--line) 60%, transparent);
}
.card-category {
  font: 10px var(--mono); letter-spacing: .06em; text-transform: uppercase;
  color: var(--faint);
}
.card-subcategory {
  font: 10px var(--mono); letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent); margin-left: auto;
}

/* ---- expanded card ---- */
.card.expanded .card-desc {
  -webkit-line-clamp: unset; display: block;
}
.card-expand {
  display: inline-block; margin-top: 8px;
  font: 11px var(--mono); color: var(--accent);
  letter-spacing: .04em; text-transform: uppercase;
  cursor: pointer; border: 0; background: none; padding: 0;
}
.card-expand:hover { text-decoration: underline; }

/* ---- animations ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}
.card { animation: fadeUp .3s ease-out both; }
.card:nth-child(2) { animation-delay: .03s; }
.card:nth-child(3) { animation-delay: .06s; }
.card:nth-child(4) { animation-delay: .09s; }
.card:nth-child(5) { animation-delay: .12s; }
.card:nth-child(6) { animation-delay: .15s; }

/* ---- responsive ---- */
@media (max-width: 768px) {
  .hero .wrap { padding: 32px 24px 28px; border-radius: 12px; }
  .hero h1 { font-size: clamp(26px, 8vw, 40px); }
  .controls .wrap { gap: 8px; }
  .controls select { min-width: 120px; flex: 1 1 45%; }
  .search-wrap { flex: 1 1 100%; }
  .grid { grid-template-columns: 1fr; }
  .stat { padding-right: 16px; margin-right: 16px; }
  .stat b { font-size: 26px; }
}
@media (max-width: 480px) {
  .nav-links { display: none; }
  .controls select { flex: 1 1 100%; }
}