:root {
  --brand-blue: #1596e0;
  --brand-blue-deep: #0a4d84;
  --brand-green: #2db878;
  --brand-green-deep: #1f9e8e;
  --bg-soft: #f4f9fc;
  --card-bg: #ffffff;
  --text-main: #14304a;
  --text-muted: #4a6883;
  --shadow: 0 14px 40px rgba(10, 77, 132, 0.15);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Nunito Sans", "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at 0% 0%, #e8f7ff 0%, rgba(232, 247, 255, 0.2) 45%),
    radial-gradient(circle at 100% 10%, #e8fff2 0%, rgba(232, 255, 242, 0.1) 45%),
    var(--bg-soft);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(244, 249, 252, 0.84);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(21, 150, 224, 0.12);
}

.nav-wrap {
  width: min(1120px, 92vw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
}

.brand img {
  height: 42px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 9px 14px;
  border-radius: 999px;
  font-weight: 700;
  color: var(--brand-blue-deep);
}

.nav-links a.active,
.nav-links a:hover {
  background: linear-gradient(135deg, rgba(21, 150, 224, 0.15), rgba(45, 184, 120, 0.15));
}

.nav-links a.meet-link {
  color: #ffffff;
  background: linear-gradient(140deg, var(--brand-blue), var(--brand-green-deep));
}

.nav-links a.meet-link:hover {
  background: linear-gradient(140deg, #1087cc, #198775);
}

main {
  width: min(1120px, 92vw);
  margin: 0 auto;
  padding: 34px 0 60px;
}

.hero {
  background: linear-gradient(145deg, rgba(21, 150, 224, 0.13), rgba(45, 184, 120, 0.12));
  border: 1px solid rgba(21, 150, 224, 0.2);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 34px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  align-items: center;
}

.hero h1 {
  margin: 0 0 12px;
  line-height: 1.1;
  font-size: clamp(2rem, 4.4vw, 3.4rem);
}

.hero p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.6;
  font-size: 1.08rem;
}

.hero-logo {
  background: #ffffff;
  border-radius: 20px;
  border: 1px solid rgba(21, 150, 224, 0.2);
  padding: 20px;
}

.hero-logo img {
  width: 100%;
  height: auto;
}

.cta-row {
  margin-top: 20px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  padding: 10px 16px;
  border-radius: 12px;
  font-weight: 700;
  display: inline-block;
}

.btn.primary {
  color: #fff;
  background: linear-gradient(140deg, var(--brand-blue), var(--brand-green-deep));
}

.btn.ghost {
  color: var(--brand-blue-deep);
  border: 1px solid rgba(21, 150, 224, 0.45);
}

.grid-3 {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.card {
  background: var(--card-bg);
  border: 1px solid rgba(21, 150, 224, 0.14);
  border-radius: var(--radius);
  box-shadow: 0 8px 25px rgba(10, 77, 132, 0.08);
  padding: 18px;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.card p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.55;
}

.about {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 18px;
}

.portrait {
  border-radius: var(--radius);
  border: 1px solid rgba(21, 150, 224, 0.2);
  background: linear-gradient(160deg, rgba(21, 150, 224, 0.16), rgba(45, 184, 120, 0.2));
  min-height: 320px;
  display: grid;
  place-items: center;
  color: var(--brand-blue-deep);
  font-size: 1.2rem;
  font-weight: 800;
}

.controls {
  margin-bottom: 16px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.search-input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(21, 150, 224, 0.3);
  border-radius: 12px;
  outline: none;
  font-size: 1rem;
}

.search-input:focus {
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(21, 150, 224, 0.16);
}

.badge {
  padding: 10px 12px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid rgba(45, 184, 120, 0.4);
  color: #1f7152;
  font-weight: 700;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.video-card h4 {
  margin: 0 0 8px;
  text-transform: capitalize;
}

.video-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: 12px;
  background: #dbe8f2;
}

.scroll-sentinel {
  height: 1px;
}

.empty {
  padding: 26px;
  text-align: center;
  color: var(--text-muted);
  border: 1px dashed rgba(21, 150, 224, 0.35);
  border-radius: var(--radius);
  background: #fff;
}

.site-footer {
  width: min(1120px, 92vw);
  margin: 0 auto;
  padding: 20px 0 40px;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .about {
    grid-template-columns: 1fr;
  }

  .video-grid {
    grid-template-columns: 1fr;
  }

  .controls {
    grid-template-columns: 1fr;
  }
}