:root {
  --bg: #020617;
  --bg-soft: #0b1224;
  --card: rgba(15, 23, 42, 0.72);
  --chip: rgba(2, 6, 23, 0.75);
  --line: #1e293b;
  --line-strong: rgba(52, 211, 153, 0.35);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #34d399;
  --accent-dark: #022c22;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius: 28px;
  --radius-sm: 18px;
  --max: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  background:
    radial-gradient(circle at 20% 20%, rgba(52, 211, 153, 0.08), transparent 30%),
    radial-gradient(circle at 80% 0%, rgba(94, 234, 212, 0.10), transparent 35%),
    linear-gradient(180deg, #020617 0%, #0b1120 40%, #020617 100%);
  color: var(--text);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img { width: 100%; display: block; border-radius: 18px; }

.container { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
.section { padding: 64px 0; }
.hero { padding: 80px 0 56px; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.3fr 0.85fr; gap: 32px; align-items: end; }

.pill {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid var(--line-strong);
  color: #86efac;
  font-size: 14px;
  margin-bottom: 18px;
}

h1, h2, h3 { margin: 0; color: #f8fafc; letter-spacing: -0.02em; }
h1 { font-size: clamp(42px, 7vw, 72px); line-height: 0.98; }
h2 { font-size: clamp(28px, 3.2vw, 40px); line-height: 1.08; }
h3 { font-size: clamp(20px, 2.6vw, 28px); line-height: 1.1; }

.subtitle { font-size: clamp(22px, 3vw, 30px); color: #cbd5e1; margin-top: 12px; }
.lead { margin-top: 18px; max-width: 780px; color: #cbd5e1; font-size: 18px; line-height: 1.72; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 18px;
  border-radius: 18px;
  font-weight: 600;
  font-size: 14px;
  border: 1px solid transparent;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}
.btn-primary {
  background: var(--accent);
  color: var(--accent-dark);
  box-shadow: 0 12px 28px rgba(52, 211, 153, 0.25);
}
.btn-secondary { border-color: #334155; color: #f8fafc; background: transparent; }
.btn-ghost { border-color: transparent; color: #a5b4fc; }
.btn:hover { transform: translateY(-1px); }
.btn-secondary:hover { border-color: #64748b; background: rgba(15, 23, 42, 0.7); }

.card, .contact-card {
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
}
.card { padding: 28px; }
.eyebrow { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 14px; }
.stat { padding: 18px; border-radius: var(--radius-sm); background: rgba(2, 6, 23, 0.65); border: 1px solid var(--line); }
.stat-value { font-size: 32px; font-weight: 700; color: #f8fafc; }
.stat-label { color: var(--muted); font-size: 14px; }

.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.section-copy { margin-top: 10px; font-size: 17px; line-height: 1.7; max-width: 720px; color: var(--muted); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 28px;
}
.filters { display: flex; flex-wrap: wrap; gap: 10px; }
.filter-btn {
  border: 1px solid #334155;
  background: var(--chip);
  color: #cbd5e1;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.12s ease;
  font-family: inherit;
}
.filter-btn.active { border-color: var(--line-strong); color: #22d3ee; background: rgba(34, 211, 238, 0.12); }
.filter-btn:focus-visible { outline: 2px solid #22d3ee; outline-offset: 2px; }

.slider { position: relative; }
.viewport {
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(2, 6, 23, 0.6);
}
.track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(280px, 1fr);
  gap: 16px;
  padding: 16px;
  transition: transform 0.28s ease;
  will-change: transform;
}

.slide {
  position: relative;
  display: grid;
  grid-template-rows: auto auto;
  gap: 12px;
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid #1f2937;
  background: rgba(15, 23, 42, 0.75);
  min-height: 100%;
}
.slide img { border: 1px solid #0f172a; }
.slide h3 { font-size: 18px; }
.slide p { margin: 0; color: #cbd5e1; font-size: 14px; line-height: 1.6; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.tag {
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--chip);
  font-size: 12px;
  color: #94a3b8;
  border: 1px solid #1f2937;
}

.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid #334155;
  background: rgba(2, 6, 23, 0.9);
  color: #cbd5e1;
  font-size: 26px;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all 0.12s ease;
  z-index: 2;
  font-family: inherit;
}
.nav-btn:hover { border-color: var(--line-strong); color: #22d3ee; }
.nav-btn:focus-visible { outline: 2px solid #22d3ee; outline-offset: 2px; }
.nav-btn:disabled { opacity: 0.35; cursor: default; }
.prev { left: -21px; }
.next { right: -21px; }

.slider-dots { display: flex; gap: 8px; justify-content: center; margin-top: 20px; }
.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #1f2937;
  border: 1px solid #334155;
  transition: all 0.18s ease;
  cursor: pointer;
  padding: 0;
}
.dot.active { background: #22d3ee; border-color: rgba(34, 211, 238, 0.3); width: 24px; }
.dot:focus-visible { outline: 2px solid #22d3ee; outline-offset: 2px; }

/* ─── Content sections below slider ─────────────────────────────────────────── */

.two-col { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 24px; align-items: start; }
.split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.project-grid { display: grid; grid-template-columns: 1fr 240px; gap: 24px; }
.quick-grid { display: grid; gap: 12px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }

.card-emerald { border-color: var(--line-strong); }

.feature {
  border-radius: 18px;
  padding: 16px;
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
}

.project-list { display: grid; gap: 24px; margin-top: 18px; }

.project-card {
  border-radius: var(--radius);
  padding: 24px;
  background: rgba(15, 23, 42, 0.62);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.project-head { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

.period {
  border: 1px solid #334155;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--muted);
}

.project-meta { margin-top: 10px; font-size: 14px; color: var(--muted); }
.project-summary { margin-top: 16px; color: #cbd5e1; font-size: 16px; line-height: 1.72; }

.bullets {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: grid;
  gap: 12px;
}

.bullets li {
  display: grid;
  grid-template-columns: 12px 1fr;
  gap: 12px;
  align-items: start;
  color: var(--text);
  font-size: 14px;
  line-height: 1.7;
}

.bullet-dot {
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-radius: 999px;
  background: var(--accent);
  flex-shrink: 0;
}

.chip-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.links-side {
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(2, 6, 23, 0.72);
  padding: 16px;
  height: fit-content;
}

.links-side .eyebrow { margin-bottom: 10px; }

.links-col { display: grid; gap: 10px; }

.link-card {
  display: block;
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(2, 6, 23, 0.6);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 14px;
  line-height: 1.65;
  transition: border-color 0.12s ease, background 0.12s ease;
}

.link-card:hover { border-color: rgba(52, 211, 153, 0.4); background: rgba(15, 23, 42, 0.82); }

.contact-list { display: grid; gap: 10px; }

.contact-grid { display: grid; grid-template-columns: 1fr 0.9fr; gap: 20px; align-items: start; }
.contact-card { padding: 18px; display: grid; gap: 10px; }
.contact-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(15, 23, 42, 0.75);
  transition: border-color 0.12s ease, background 0.12s ease;
}
.contact-row:hover { border-color: rgba(52, 211, 153, 0.35); background: rgba(2, 6, 23, 0.82); }
.contact-label { color: var(--muted); font-size: 14px; }
.contact-value { color: #f8fafc; font-weight: 600; font-size: 14px; }

.footer-line { border-top: 1px solid var(--line); }

@media (max-width: 1100px) {
  .hero-grid { grid-template-columns: 1fr; }
  .nav-btn { display: none; }
  .track { grid-auto-columns: minmax(260px, 1fr); }
  .two-col,
  .project-grid,
  .split-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .section { padding: 44px 0; }
  .container { width: min(var(--max), calc(100% - 20px)); }
  .card { padding: 22px; }
  .track { grid-auto-columns: minmax(220px, 1fr); padding: 12px; }
  .contact-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .project-summary { font-size: 15px; }
  .video-grid { grid-template-columns: 1fr; }
}

/* ─── YouTube embed grid ─────────────────────────────────────────────────── */

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.yt-embed {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #000;
  cursor: pointer;
}

.yt-embed iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.yt-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 0;
}

.yt-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.2);
  border: none;
  cursor: pointer;
  transition: background 0.15s ease;
  padding: 0;
  width: 100%;
}

.yt-play:hover { background: rgba(0, 0, 0, 0.35); }
.yt-play svg { filter: drop-shadow(0 2px 6px rgba(0,0,0,0.5)); }

.yt-title {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 28px 14px 10px;
  background: linear-gradient(transparent, rgba(0,0,0,0.75));
  color: #f8fafc;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
}

/* Also apply inside links-side for the project cards */
.links-side .yt-embed {
  border-radius: 14px;
  margin-top: 0;
}