:root {
  color-scheme: light;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  --bg-start: #dbeafe;
  --bg-end: #fee2e2;
  --card-bg: rgba(255, 255, 255, 0.94);
  --text-main: #0f172a;
  --text-muted: #334155;
  --blue-strong: #1d4ed8;
  --red-strong: #dc2626;
  --line-soft: #cbd5e1;
  --shadow: 0 20px 60px rgba(30, 64, 175, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 24px 16px;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 10% 10%, rgba(29, 78, 216, 0.25), transparent 45%),
    radial-gradient(circle at 90% 90%, rgba(220, 38, 38, 0.2), transparent 45%),
    linear-gradient(135deg, var(--bg-start) 0%, var(--bg-end) 100%);
  color: var(--text-main);
}

.card {
  width: 100%;
  max-width: 760px;
  background: var(--card-bg);
  border: 1px solid var(--line-soft);
  border-radius: 24px;
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-strong);
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(4rem, 15vw, 7rem);
  line-height: 1;
  color: var(--red-strong);
}

.down-percent {
  margin: 6px 0 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--blue-strong);
}

.subtitle {
  margin: 12px 0 0;
  font-size: 1rem;
  color: var(--text-muted);
}

.coasters-list {
  margin-top: 28px;
  text-align: left;
}

.coasters-list h2 {
  margin: 0 0 12px;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue-strong);
}

.coasters-list details {
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  background: #ffffff;
  margin-bottom: 10px;
  overflow: hidden;
}

.coasters-list summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 14px;
  font-weight: 700;
  color: var(--text-main);
  background: linear-gradient(90deg, rgba(29, 78, 216, 0.08), rgba(220, 38, 38, 0.08));
}

.coasters-list summary::-webkit-details-marker {
  display: none;
}

.coasters-list ul {
  list-style: none;
  margin: 0;
  padding: 8px 14px 14px;
}

.coasters-list li {
  padding: 8px 0;
  border-bottom: 1px dashed #e2e8f0;
  color: var(--text-main);
}

.coasters-list li:last-child {
  border-bottom: 0;
}

.stats {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  text-align: left;
  color: var(--text-muted);
}

.stats p {
  margin: 6px 0;
}

.stats strong {
  color: var(--red-strong);
}

.error-card {
  max-width: 560px;
}

.error-message {
  margin-top: 10px;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .card {
    padding: 28px 18px;
  }

  h1 {
    font-size: clamp(3rem, 18vw, 5rem);
  }
}