:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #2a2f3a;
  --text: #e8eaed;
  --muted: #8b93a1;
  --accent: #5b8cff;
  --accent-2: #3d6be0;
  --danger: #e5484d;
  --off: #4a5160;
}

* { box-sizing: border-box; }

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 28px;
  border-bottom: 1px solid var(--border);
}

.topbar h1 {
  font-size: 20px;
  font-weight: 600;
  margin: 0;
}

.btn {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); font-weight: 600; }
.btn-primary:hover { background: var(--accent-2); }

.week-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 12px;
  padding: 20px;
}

.day-col {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.day-col h3 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 0 0 4px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.event-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  transition: border-color 0.15s;
}
.event-card:hover { border-color: var(--accent); }
.event-card.inactive { opacity: 0.4; }

.event-time {
  font-weight: 700;
  color: var(--accent);
  font-size: 14px;
}

.event-title {
  font-weight: 600;
  word-break: break-word;
}

.event-topic {
  color: var(--muted);
  font-size: 11px;
}

.event-actions {
  display: flex;
  gap: 6px;
  margin-top: 4px;
}

.event-actions button {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 4px;
}
.event-actions button:hover { color: var(--text); background: var(--border); }
.event-actions button.danger:hover { color: var(--danger); }

dialog {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0;
  width: 380px;
  max-width: 90vw;
}
dialog::backdrop { background: rgba(0, 0, 0, 0.6); }

#event-form {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

#event-form h2 { margin: 0 0 4px; font-size: 17px; }

#event-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

#event-form input, #event-form select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 9px 10px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
}
#event-form input:focus, #event-form select:focus {
  outline: none;
  border-color: var(--accent);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 8px;
}

.form-error {
  color: var(--danger);
  font-size: 13px;
  margin: 0;
  min-height: 16px;
}

@media (max-width: 900px) {
  .week-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .week-grid { grid-template-columns: 1fr; }
}