:root {
  color-scheme: dark;
  --bg: #2a1b14;
  --bg-card: #3a2620;
  --bg-card-hover: #43302a;
  --fg: #f5e6d5;
  --muted: #b8a491;
  --border: #4a332a;
  --accent: #e07840;
  --ok: #7ec88a;
  --danger: #e0674a;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: radial-gradient(circle at 20% 0%, #4a2a1d 0%, var(--bg) 60%);
  color: var(--fg);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}

main { max-width: 900px; margin: 0 auto; padding: 2rem 1.5rem 4rem; }

a { color: var(--accent); }

h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); margin: 0 0 0.35rem; letter-spacing: -0.01em; }
.tagline, .desc { color: var(--muted); line-height: 1.5; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

.field { margin-bottom: 1rem; }
.field label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 0.35rem; }
.field input, .field textarea, .field select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--fg);
  border-radius: 8px;
  padding: 0.55rem 0.7rem;
  font-family: inherit;
  font-size: 0.95rem;
}
.field textarea { resize: vertical; min-height: 4.5rem; }
.field-hint { font-size: 0.78rem; color: var(--muted); margin-top: 0.3rem; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1.2rem;
  font-weight: 600;
  font-size: 0.9rem;
}
.btn-primary { background: var(--accent); color: #1a1a1a; }
.btn-primary:hover { opacity: 0.9; }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-secondary { background: transparent; border: 1px solid var(--border); color: var(--fg); }
.btn-secondary:hover { border-color: var(--muted); }
.btn-danger { background: transparent; border: 1px solid var(--danger); color: var(--danger); }
.btn-danger:hover { background: rgba(224, 103, 74, 0.12); }

.badge {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
  border: 1px solid;
}
.badge-available { color: var(--ok); border-color: var(--ok); }
.badge-taken { color: var(--danger); border-color: var(--danger); }

.error-banner {
  background: rgba(224, 103, 74, 0.12);
  border: 1px solid var(--danger);
  color: #f5c9bd;
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  font-size: 0.88rem;
  margin-bottom: 1rem;
}

.history-item {
  display: flex;
  gap: 0.75rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}
.history-item:last-child { border-bottom: none; }
.history-icon { flex-shrink: 0; width: 1.4rem; text-align: center; }
.history-meta { color: var(--muted); font-size: 0.78rem; }

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

footer { border-top: 1px solid var(--border); padding-top: 1.5rem; margin-top: 2rem; text-align: center; color: var(--muted); font-size: 0.85rem; }
footer a { color: var(--fg); text-decoration: none; border-bottom: 1px dashed var(--muted); }

.row { display: flex; gap: 0.75rem; flex-wrap: wrap; align-items: center; }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }