:root {
  --bg: #0d1117;
  --bg2: #151b23;
  --card: #1c242f;
  --text: #f7fbff;
  --muted: #a2b3c6;
  --accent: #44d17a;
  --warn: #ffb347;
  --danger: #ff6b7a;
  --border: #2a3542;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 10% 10%, rgba(68, 209, 122, 0.25), transparent 35%),
    radial-gradient(circle at 90% 20%, rgba(67, 127, 255, 0.24), transparent 25%),
    linear-gradient(135deg, var(--bg), #0a0f14 50%, var(--bg2));
  color: var(--text);
  font-family: "Space Grotesk", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
}

.app-shell {
  width: min(1100px, 94vw);
  margin: 24px auto 48px;
  display: grid;
  gap: 16px;
}

.hero {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(20, 30, 40, 0.88);
  backdrop-filter: blur(8px);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  letter-spacing: 0.06em;
  font-size: 13px;
}

h1,
h2,
h3 {
  margin: 0;
}

.subcopy {
  margin: 10px 0 0;
  color: var(--muted);
}

.panel {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  background: rgba(18, 26, 34, 0.88);
}

.inline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}

.between {
  justify-content: space-between;
}

input,
select,
button {
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #111921;
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
}

input,
select {
  min-width: 180px;
}

button {
  cursor: pointer;
  background: linear-gradient(120deg, #123d27, #1a5f3b);
  border-color: #2f8456;
  transition: transform 160ms ease, filter 160ms ease;
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
}

button:active {
  transform: translateY(0);
}

.hint {
  color: var(--muted);
}

.codeblock {
  margin: 12px 0 0;
  background: #0d1319;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  max-height: 240px;
  overflow: auto;
  white-space: pre-wrap;
}

#mothersContainer {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.mother-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: linear-gradient(160deg, rgba(29, 40, 52, 0.95), rgba(15, 22, 30, 0.95));
  padding: 14px;
  display: grid;
  gap: 12px;
}

.mother-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.meta {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: rgba(255, 179, 71, 0.2);
  color: var(--warn);
  border: 1px solid rgba(255, 179, 71, 0.45);
}

.status-badge.paid {
  background: rgba(68, 209, 122, 0.2);
  color: var(--accent);
  border-color: rgba(68, 209, 122, 0.45);
}

.seat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.seat-item {
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #121a22;
  padding: 8px 10px;
  font-size: 13px;
}

.seat-item.empty {
  color: var(--muted);
}

.seat-item.occupied {
  border-color: rgba(68, 209, 122, 0.5);
  background: rgba(68, 209, 122, 0.12);
}

.mother-footer {
  display: flex;
  gap: 8px;
}

.mother-footer input {
  flex: 1;
  min-width: 0;
}

@media (max-width: 640px) {
  .app-shell {
    margin-top: 14px;
  }
  .seat-grid {
    grid-template-columns: 1fr;
  }
  .mother-footer {
    flex-direction: column;
  }
}