/* fcs.ugrad.ai · promo + floating glass over graphic field */
:root {
  --bg0: #03050a;
  --glass: rgba(12, 16, 26, 0.55);
  --glass2: rgba(18, 24, 38, 0.72);
  --line: rgba(160, 200, 255, 0.16);
  --line2: rgba(160, 200, 255, 0.32);
  --text: rgba(240, 246, 255, 0.96);
  --muted: rgba(170, 190, 215, 0.78);
  --ice: #8ad0ff;
  --ok: #5ee0a0;
  --gold: #f0c96a;
  --hot: #ff8f6e;
  --font: ui-sans-serif, system-ui, -apple-system, "SF Pro Text", "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --radius: 18px;
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body {
  margin: 0;
  min-height: 100%;
  color: var(--text);
  font: 400 15px/1.5 var(--font);
  background: var(--bg0);
}
body { overflow-x: hidden; }
a { color: var(--ice); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── animated graphic field ── */
.bg-field {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 15% 10%, rgba(40, 110, 220, 0.35), transparent 55%),
    radial-gradient(ellipse 70% 45% at 85% 15%, rgba(30, 180, 140, 0.18), transparent 50%),
    radial-gradient(ellipse 60% 40% at 50% 90%, rgba(120, 60, 200, 0.12), transparent 55%),
    linear-gradient(180deg, #050812 0%, #03050a 40%, #02040a 100%);
}
.bg-field canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
}
.bg-field .veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(3, 5, 10, 0.15) 0%, transparent 30%, rgba(3, 5, 10, 0.55) 100%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0, 0, 0, 0.03) 2px,
      rgba(0, 0, 0, 0.03) 4px
    );
}

/* ── top chrome floating ── */
.top {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 20px;
  backdrop-filter: blur(28px) saturate(1.4);
  -webkit-backdrop-filter: blur(28px) saturate(1.4);
  background: rgba(6, 10, 18, 0.45);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
  min-width: 0;
}
.brand:hover { text-decoration: none; }
.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 0 28px rgba(80, 160, 255, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.brand b {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.brand span {
  display: block;
  font-size: 12px;
  color: var(--muted);
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.nav a, .btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font: 600 12px/1 var(--font);
  letter-spacing: 0.04em;
  cursor: pointer;
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s, transform 0.15s;
}
.nav a:hover, .btn:hover {
  border-color: var(--line2);
  background: rgba(80, 140, 220, 0.16);
  text-decoration: none;
  transform: translateY(-1px);
}
.btn.primary {
  background: linear-gradient(135deg, rgba(20, 140, 255, 0.95), rgba(40, 100, 220, 0.9));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 8px 28px rgba(20, 120, 255, 0.35);
}
.btn.gold {
  background: rgba(240, 201, 106, 0.12);
  border-color: rgba(240, 201, 106, 0.4);
  color: var(--gold);
}

/* ── page stack above field ── */
.page {
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 18px 80px;
}

/* glass panels */
.glass {
  background: var(--glass);
  backdrop-filter: blur(40px) saturate(1.5);
  -webkit-backdrop-filter: blur(40px) saturate(1.5);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.glass-strong {
  background: var(--glass2);
}

/* hero */
.hero {
  display: grid;
  grid-template-columns: 1.25fr 0.9fr;
  gap: 18px;
  margin-bottom: 28px;
  align-items: stretch;
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
}
.hero-main {
  padding: 28px 28px 24px;
}
.hero-main .eyebrow {
  font: 700 11px/1 var(--font);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ice);
  margin: 0 0 12px;
}
.hero-main h1 {
  margin: 0 0 14px;
  font-size: clamp(1.85rem, 4.2vw, 2.75rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 700;
}
.hero-main h1 em {
  font-style: normal;
  background: linear-gradient(120deg, #9ad4ff, #7ef0c0 50%, #f0c96a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-main .lead {
  margin: 0 0 18px;
  max-width: 40ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.55;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}
.slash-marquee {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.slash-chip {
  font: 600 11px/1 var(--mono);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.28);
  color: var(--gold);
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
}
.slash-chip:hover, .slash-chip.on {
  border-color: rgba(240, 201, 106, 0.55);
  background: rgba(240, 201, 106, 0.12);
  color: #fff;
}
.hero-side {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.hero-side h2 {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.cli-block {
  margin: 0;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.06);
  font: 500 12px/1.55 var(--mono);
  color: rgba(170, 235, 200, 0.95);
  overflow-x: auto;
  white-space: pre;
}
.browser-card {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.25);
}
.browser-card img {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  box-shadow: 0 0 24px rgba(80, 160, 255, 0.35);
}
.browser-card b { display: block; font-size: 15px; }
.browser-card span { font-size: 12px; color: var(--muted); }

/* section heads */
.sec-hd {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin: 32px 0 14px;
}
.sec-hd h2 {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.sec-hd span { font-size: 12px; color: var(--muted); }

/* skills: one row layout — left rail + detail floating */
.skills-row {
  display: grid;
  grid-template-columns: minmax(200px, 260px) 1fr;
  gap: 14px;
  min-height: min(72vh, 720px);
  align-items: stretch;
}
@media (max-width: 820px) {
  .skills-row { grid-template-columns: 1fr; min-height: 0; }
}
.skills-rail {
  padding: 12px;
  max-height: min(72vh, 720px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.rail-search {
  width: 100%;
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.35);
  color: var(--text);
  font: 500 12px/1.2 var(--mono);
  padding: 10px 12px;
  margin-bottom: 10px;
  outline: none;
}
.rail-search:focus { border-color: var(--line2); }
.rail-scroll {
  flex: 1;
  overflow-y: auto;
  padding-right: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(120, 160, 200, 0.3) transparent;
}
.rail-group-label {
  font: 700 10px/1 var(--font);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 12px 8px 6px;
}
.rail-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  text-align: left;
  padding: 9px 10px;
  border-radius: 10px;
  cursor: pointer;
  font: 500 12px/1.2 var(--mono);
  margin-bottom: 2px;
  transition: background 0.12s, border-color 0.12s;
}
.rail-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--line);
}
.rail-item.on {
  background: rgba(30, 90, 160, 0.35);
  border-color: rgba(120, 190, 255, 0.4);
}
.rail-item .sl {
  color: var(--gold);
  font-weight: 700;
  min-width: 6.8em;
}
.rail-item .nm {
  color: var(--muted);
  font: 500 11px/1.2 var(--font);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.rail-item.on .nm { color: rgba(220, 235, 255, 0.92); }

/* skill detail panel */
.skill-panel {
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: min(72vh, 720px);
}
.skill-panel-scroll {
  overflow-y: auto;
  padding: 22px 24px 28px;
  flex: 1;
  scrollbar-width: thin;
}
.skill-panel .kicker {
  font: 700 11px/1 var(--font);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ice);
  margin: 0 0 8px;
}
.skill-panel h1 {
  margin: 0 0 4px;
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}
.skill-panel .slash-hero {
  font: 700 22px/1.2 var(--mono);
  color: var(--gold);
  margin: 0 0 12px;
}
.badge {
  display: inline-flex;
  font: 700 9px/1 var(--font);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--muted);
  vertical-align: middle;
  margin-left: 8px;
}
.badge.shipped { color: var(--ok); border-color: rgba(94, 224, 160, 0.4); }
.badge.lab { color: var(--gold); border-color: rgba(240, 201, 106, 0.4); }
.badge.external { color: var(--ice); border-color: rgba(138, 208, 255, 0.4); }

.what-hero {
  margin: 0 0 18px;
  padding: 16px 18px;
  border-radius: 14px;
  border: 1px solid rgba(138, 208, 255, 0.28);
  background: linear-gradient(135deg, rgba(25, 80, 150, 0.35), rgba(8, 12, 22, 0.5));
  font-size: 15px;
  line-height: 1.55;
  color: rgba(230, 240, 255, 0.96);
}
.what-hero strong {
  display: block;
  font: 700 10px/1 var(--font);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ice);
  margin-bottom: 8px;
}

/* section cards inside skill */
.sec-stack { display: flex; flex-direction: column; gap: 12px; }
.sec-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.28);
  padding: 14px 16px;
}
.sec-card h3 {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}
.sec-card .prose {
  margin: 0;
  color: rgba(215, 228, 245, 0.92);
  font-size: 13.5px;
  line-height: 1.55;
}
.example-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
}
.example-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 12px 10px;
  background: rgba(10, 14, 22, 0.75);
}
.example-card code {
  display: block;
  font: 600 11px/1.35 var(--mono);
  color: var(--ok);
  margin-bottom: 6px;
  word-break: break-all;
}
.example-card p {
  margin: 0;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.4;
}
.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
}
.mode-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 11px 12px;
  background: rgba(12, 16, 24, 0.8);
}
.mode-card b {
  display: block;
  font-size: 12px;
  color: var(--ice);
  margin-bottom: 4px;
}
.mode-card p {
  margin: 0;
  font-size: 11px;
  color: var(--muted);
  line-height: 1.4;
}
.sec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}
.sec-table td {
  padding: 7px 8px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.sec-table td:first-child {
  font-family: var(--mono);
  color: var(--gold);
  width: 6.5em;
  white-space: nowrap;
}
.sec-table td:last-child { color: var(--muted); }
.panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

/* download strip — one row on page */
.download-row {
  margin-top: 32px;
  padding: 22px 24px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
}
@media (max-width: 720px) {
  .download-row { grid-template-columns: 1fr; text-align: center; }
  .download-row .browser-card { justify-content: center; }
  .download-row .dl-actions { justify-content: center; }
}
.download-row h2 {
  margin: 0 0 4px;
  font-size: 1.15rem;
}
.download-row p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}
.dl-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* empty / loading */
.panel-empty {
  padding: 40px 28px;
  color: var(--muted);
}
.panel-empty h2 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 1.25rem;
}

.foot {
  margin-top: 36px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 11px;
}
.pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 8px var(--ok);
}
.mono { font-family: var(--mono); font-size: 12px; color: var(--ok); }