:root {
  color-scheme: dark;
  --ink: #f5f7fb;
  --muted: rgba(245, 247, 251, 0.68);
  --line: rgba(255, 255, 255, 0.16);
  --cyan: #55e6ff;
  --green: #6bf0b4;
  --amber: #f6c861;
  --bg: #05080e;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  overflow: hidden;
}

.stage {
  position: relative;
  min-height: 100vh;
  width: 100vw;
  isolation: isolate;
  background:
    radial-gradient(circle at 70% 38%, rgba(62, 203, 255, 0.22), transparent 34rem),
    radial-gradient(circle at 18% 80%, rgba(107, 240, 180, 0.13), transparent 30rem),
    linear-gradient(135deg, #060b13 0%, #08111c 46%, #03050a 100%);
}

#earth-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

.hud {
  position: absolute;
  z-index: 2;
  left: clamp(1.25rem, 4vw, 4.5rem);
  top: clamp(1.25rem, 6vh, 4.5rem);
  max-width: min(32rem, calc(100vw - 2.5rem));
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--green);
  font-size: clamp(0.72rem, 1.4vw, 0.84rem);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(3.2rem, 9vw, 8rem);
  line-height: 0.88;
  font-weight: 850;
  letter-spacing: 0;
}

.summary {
  margin: 1.2rem 0 0;
  max-width: 30rem;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.22rem);
  line-height: 1.55;
}

.metrics {
  position: absolute;
  z-index: 2;
  right: clamp(1rem, 3.5vw, 3rem);
  top: clamp(1rem, 4vh, 3rem);
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  justify-content: flex-end;
  color: rgba(245, 247, 251, 0.78);
  font-size: 0.86rem;
  pointer-events: none;
}

.metrics span,
.hint {
  border: 1px solid var(--line);
  background: rgba(5, 8, 14, 0.38);
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.24);
}

.metrics span {
  display: inline-flex;
  min-height: 2.4rem;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 0.78rem;
}

.metrics strong {
  color: var(--cyan);
}

.hint {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: clamp(1rem, 4vh, 2.4rem);
  transform: translateX(-50%);
  padding: 0.62rem 0.88rem;
  color: rgba(245, 247, 251, 0.7);
  font-size: 0.82rem;
  pointer-events: none;
}

.stage::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5, 8, 14, 0.86) 0%, rgba(5, 8, 14, 0.46) 28%, rgba(5, 8, 14, 0.06) 62%),
    linear-gradient(0deg, rgba(5, 8, 14, 0.58) 0%, transparent 24%, rgba(5, 8, 14, 0.18) 100%);
}

@media (max-width: 760px) {
  .stage::after {
    background:
      linear-gradient(0deg, rgba(5, 8, 14, 0.8) 0%, rgba(5, 8, 14, 0.22) 46%, rgba(5, 8, 14, 0.45) 100%);
  }

  .hud {
    top: auto;
    bottom: 5rem;
  }

  h1 {
    font-size: clamp(3.2rem, 17vw, 5.8rem);
  }

  .summary {
    max-width: 22rem;
  }

  .metrics {
    left: 1rem;
    right: 1rem;
    justify-content: space-between;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hint {
    display: none;
  }
}