:root {
  --bg: #0b1020;
  --card: #131a2f;
  --card2: #1a2240;
  --text: #f3f6ff;
  --muted: #9ea8c3;
  --accent: #5c8dff;
  --accent2: #7a5cff;
  --ok: #30d27c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at 20% 0%, #1f2a50 0%, var(--bg) 55%);
  color: var(--text);
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 16px;
  display: grid;
  gap: 12px;
}

.card {
  background: linear-gradient(135deg, var(--card) 0%, var(--card2) 100%);
  border: 1px solid #2a3665;
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.hero {
  padding: 20px;
}

.muted {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 13px;
}

h1 {
  margin: 0;
  font-size: 24px;
  letter-spacing: 0.2px;
}

.subtitle {
  margin: 8px 0 0;
  color: #c9d2f1;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.value {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
}

.value.small {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
}

.btn {
  display: inline-block;
  margin-top: 8px;
  padding: 12px 14px;
  border-radius: 12px;
  background: linear-gradient(120deg, var(--accent), var(--accent2));
  color: white;
  text-decoration: none;
  font-weight: 600;
}

.btn.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.hint {
  margin: 10px 0 0;
  color: #b6c1de;
  font-size: 14px;
}

.active {
  color: var(--ok);
}

@media (max-width: 640px) {
  .grid {
    grid-template-columns: 1fr;
  }
}