:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-border: #334155;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --green: #22c55e;
  --amber: #f59e0b;
  --red: #ef4444;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--panel-border);
}

.topbar h1 {
  font-size: 1.1rem;
  margin: 0;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-transform: uppercase;
}

.icon-button {
  background: none;
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 8px;
  width: 2.25rem;
  height: 2.25rem;
  font-size: 1.1rem;
  cursor: pointer;
}

.icon-button:hover {
  background: var(--panel);
}

.settings {
  background: var(--panel);
  border-bottom: 1px solid var(--panel-border);
  padding: 1rem 1.25rem;
}

.settings form {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75rem;
}

.field-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.field-row label {
  font-size: 0.75rem;
  color: var(--muted);
}

.field-row input {
  background: var(--bg);
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: 6px;
  padding: 0.5rem 0.6rem;
  font-size: 1rem;
  width: 6rem;
  text-transform: uppercase;
}

.field-row input[type="number"] {
  width: 5rem;
  text-transform: none;
}

.settings button[type="submit"] {
  background: var(--green);
  color: #04220f;
  border: none;
  border-radius: 6px;
  padding: 0.55rem 1.1rem;
  font-weight: 600;
  cursor: pointer;
}

.hint {
  margin: 0.75rem 0 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.app {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 1rem 2rem;
  gap: 1rem;
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
}

.status-line {
  color: var(--muted);
  font-size: 1rem;
  text-align: center;
  margin: 0;
}

.notices {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.notice {
  background: #3f1d1d;
  border: 1px solid #7f1d1d;
  color: #fecaca;
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
  font-size: 0.9rem;
}

.trains {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.train-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 1.25rem 1.5rem;
  border-left-width: 6px;
}

.train-card.status-leave-by {
  border-left-color: var(--green);
}

.train-card.status-leave-by.soon {
  border-left-color: var(--amber);
}

.train-card.status-leave-now {
  border-left-color: var(--red);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 rgba(239, 68, 68, 0); }
  50% { box-shadow: 0 0 0 6px rgba(239, 68, 68, 0.12); }
}

.train-card .leave-message {
  font-size: 2rem;
  font-weight: 700;
  margin: 0 0 0.35rem;
}

.status-leave-by .leave-message {
  color: var(--green);
}

.train-card.status-leave-by.soon .leave-message {
  color: var(--amber);
}

.status-leave-now .leave-message {
  color: var(--red);
}

.train-details {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.train-details .delayed {
  color: var(--amber);
}

.train-details strong {
  color: var(--text);
}

.empty-state {
  color: var(--muted);
  text-align: center;
  padding: 2rem 1rem;
  font-size: 1.05rem;
}

.footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.75rem;
  padding: 0.75rem;
}

@media (max-width: 420px) {
  .field-row input {
    width: 100%;
  }
  .settings form {
    flex-direction: column;
    align-items: stretch;
  }
}