:root {
  --bg: #0f1720;
  --panel: #17212b;
  --panel-2: #1e2a36;
  --border: #2a3947;
  --text: #e7edf3;
  --muted: #93a4b3;
  --accent: #4f8ef7;
  --accent-2: #3a6fd6;
  --good: #3ecf8e;
  --bad: #f76c6c;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.app { max-width: 960px; margin: 0 auto; padding: 24px 16px 80px; }

header.topbar {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px;
}
header.topbar h1 { font-size: 1.3rem; margin: 0; }
header.topbar .who { color: var(--muted); font-size: 0.9rem; }

.avatar-btn {
  -webkit-appearance: none; appearance: none;
  width: 36px; height: 36px; min-width: 36px; flex-shrink: 0;
  border-radius: 50%; border: none; margin: 0;
  background: var(--accent-2); color: white; font-size: 0.85rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center; padding: 0;
  line-height: 1; overflow: hidden;
}
.avatar-btn:hover { background: var(--accent); }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

h2 { margin-top: 0; font-size: 1.1rem; }
h3 { font-size: 1rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }

label { display: block; margin: 10px 0 4px; font-size: 0.85rem; color: var(--muted); }
input, select, textarea {
  width: 100%; padding: 9px 10px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); font-size: 0.95rem;
}
textarea { resize: vertical; min-height: 60px; }

button {
  cursor: pointer; border: none; border-radius: 8px; padding: 10px 16px;
  background: var(--accent); color: white; font-size: 0.95rem; font-weight: 600;
  margin-top: 12px;
}
button:hover { background: var(--accent-2); }
button.secondary { background: var(--panel-2); border: 1px solid var(--border); color: var(--text); }
button.danger { background: var(--bad); }
button.small { padding: 6px 10px; font-size: 0.85rem; margin-top: 0; }

.tabs { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.tabs button.tab {
  background: var(--panel-2); color: var(--muted); margin-top: 0;
  border: 1px solid var(--border);
}
.tabs button.tab.active { background: var(--accent); color: white; border-color: var(--accent); }

.error { color: var(--bad); font-size: 0.9rem; margin-top: 8px; }
.success { color: var(--good); font-size: 0.9rem; margin-top: 8px; }
.muted { color: var(--muted); font-size: 0.85rem; }

.role-toggle { display: flex; gap: 8px; margin-bottom: 4px; }
.role-toggle button { flex: 1; margin-top: 0; }

.day-block {
  display: flex; align-items: center; gap: 10px; padding: 8px 0;
  border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.day-block:last-child { border-bottom: none; }
.day-block .day-name { width: 90px; color: var(--muted); }

.slot-grid { display: flex; flex-direction: column; gap: 14px; }
.slot-day { }
.slot-day .date-label { font-weight: 600; margin-bottom: 6px; }
.slot-buttons {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px;
}
.slot-buttons button {
  margin-top: 0; background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  padding: 14px 12px; font-size: 1.05rem; font-weight: 500; width: 100%;
}
.slot-buttons button:hover { background: var(--accent); border-color: var(--accent); }
.slot-buttons button.booked {
  background: #4a5563; color: #8b97a3; border-color: #4a5563;
  text-decoration: line-through; cursor: not-allowed; font-weight: 400;
}
.slot-buttons button.booked:hover { background: #4a5563; border-color: #4a5563; }
.slot-buttons button.selected { background: var(--good); border-color: var(--good); }

.appt-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0; border-bottom: 1px solid var(--border); gap: 10px; flex-wrap: wrap;
}
.appt-row:last-child { border-bottom: none; }
.appt-main { }
.appt-main .when { font-weight: 600; }
.appt-main .with { color: var(--muted); font-size: 0.9rem; }
.status-badge {
  font-size: 0.75rem; padding: 2px 8px; border-radius: 20px; text-transform: uppercase;
  letter-spacing: 0.03em;
}
.status-badge.booked { background: rgba(62,207,142,0.15); color: var(--good); }
.status-badge.cancelled { background: rgba(247,108,108,0.15); color: var(--bad); }

.presidency-picker { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.presidency-picker button {
  margin-top: 0; background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
}
.presidency-picker button.selected { background: var(--accent); border-color: var(--accent); }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
.modal { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; width: 90%; max-width: 400px; }

.hidden { display: none !important; }