:root {
  --bg: #edf8f6;
  --surface: rgba(255, 255, 255, 0.74);
  --line: rgba(12, 74, 110, 0.12);
  --text: #0f172a;
  --muted: #475569;
  --accent: #0891b2;
  --accent-soft: #5eead4;
  --shadow: 0 24px 64px rgba(8, 145, 178, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background:
    linear-gradient(140deg, rgba(94, 234, 212, 0.2), transparent 32%),
    linear-gradient(220deg, rgba(8, 145, 178, 0.16), transparent 36%),
    repeating-linear-gradient(
      90deg,
      rgba(15, 23, 42, 0.03) 0,
      rgba(15, 23, 42, 0.03) 1px,
      transparent 1px,
      transparent 40px
    ),
    linear-gradient(180deg, #f8fffe 0%, var(--bg) 100%);
}

.shell {
  width: min(1120px, calc(100vw - 40px));
  margin: 0 auto;
  padding: 40px 0 68px;
}

.masthead {
  padding: 38px 38px 56px;
  border: 1px solid var(--line);
  border-radius: 34px;
  background: var(--surface);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.badge {
  display: inline-flex;
  align-items: center;
  margin: 0;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(8, 145, 178, 0.1);
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1 {
  max-width: 11ch;
  margin: 24px 0 0;
  font-size: clamp(3rem, 7vw, 6rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
}

.lede {
  max-width: 60ch;
  margin: 24px 0 0;
  font-size: 1.08rem;
  line-height: 1.8;
  color: var(--muted);
}

.stack {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.pill {
  padding: 12px 16px;
  border: 1px solid rgba(8, 145, 178, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.85);
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
}

.panels {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.panel {
  position: relative;
  overflow: hidden;
  padding: 24px;
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(255, 255, 255, 0.62)),
    linear-gradient(135deg, rgba(94, 234, 212, 0.08), rgba(8, 145, 178, 0.04));
  box-shadow: 0 18px 38px rgba(15, 23, 42, 0.05);
}

.panel::after {
  content: "";
  position: absolute;
  right: -16px;
  bottom: -16px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(8, 145, 178, 0.14), transparent 68%);
}

.panel-index {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 1.5rem;
}

.panel p {
  margin: 0;
  line-height: 1.75;
  color: var(--muted);
}

@media (max-width: 860px) {
  .shell {
    width: min(100vw - 24px, 1120px);
    padding: 20px 0 36px;
  }

  .masthead {
    padding: 24px 22px 34px;
  }

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