/* ============================================================
   CSS Custom Properties
   ============================================================ */
:root {
  --bg:           #0f1117;
  --bg-surface:   #1a1d27;
  --bg-elevated:  #222537;
  --bg-hover:     #2a2d40;
  --border:       #2e3148;
  --border-light: #3a3d58;
  --text:         #e8eaf6;
  --text-muted:   #8b8fa8;
  --text-dim:     #5c5f7a;
  --accent:       #6c63ff;
  --accent-hover: #7c74ff;
  --accent-dim:   rgba(108, 99, 255, 0.15);
  --danger:       #e05c5c;
  --danger-hover: #f06c6c;
  --success:      #4caf7d;
  --radius:       10px;
  --radius-sm:    6px;
  --shadow:       0 8px 32px rgba(0,0,0,0.4);
  --shadow-sm:    0 2px 8px rgba(0,0,0,0.3);
  --transition:   0.15s ease;
  --font:         -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

/* ============================================================
   Auth pages (login / setup)
   ============================================================ */
body.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: radial-gradient(ellipse at 60% 40%, #1a1d3a 0%, var(--bg) 70%);
}

.auth-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow);
  text-align: center;
}

.auth-icon { font-size: 2.5rem; margin-bottom: 12px; }

.auth-card h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 28px;
  color: var(--text);
}

/* ============================================================
   App Layout
   ============================================================ */
body:not(.auth-page) {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.app-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 20px;
  height: 56px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  z-index: 10;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 160px;
}

.app-logo { font-size: 1.3rem; }

.app-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text);
  white-space: nowrap;
}

.header-center { flex: 1; display: flex; justify-content: center; }

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 160px;
  justify-content: flex-end;
}

main {
  flex: 1;
  overflow: hidden;
  padding: 16px 20px;
}

#calendar {
  height: 100%;
}

/* ============================================================
   View Switcher
   ============================================================ */
.view-switcher {
  display: flex;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px;
  gap: 2px;
}

.view-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 5px 14px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
}

.view-btn:hover { background: var(--bg-hover); color: var(--text); }
.view-btn.active { background: var(--accent); color: #fff; }

/* ============================================================
   Search & Filters
   ============================================================ */
.search-wrap input,
#category-filter {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 6px 12px;
  font-size: 13px;
  outline: none;
  transition: border-color var(--transition);
}

.search-wrap input { width: 180px; }
#category-filter { cursor: pointer; }

.search-wrap input:focus,
#category-filter:focus {
  border-color: var(--accent);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 500;
  padding: 7px 14px;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background: var(--bg-hover); color: var(--text); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }

.btn-full { width: 100%; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* ============================================================
   Forms
   ============================================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 14px;
}

.form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  padding: 8px 12px;
  outline: none;
  transition: border-color var(--transition);
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-group textarea { resize: vertical; min-height: 72px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-check label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-size: 14px;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text);
  font-weight: normal;
}

.form-check input[type="checkbox"] { width: 16px; height: 16px; cursor: pointer; accent-color: var(--accent); }

.error-msg {
  color: var(--danger);
  font-size: 13px;
  padding: 8px 12px;
  background: rgba(224, 92, 92, 0.1);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(224, 92, 92, 0.3);
  margin-bottom: 12px;
}

.hidden { display: none !important; }

/* ============================================================
   Modal
   ============================================================ */
.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 0;
  width: 560px;
  max-width: 95vw;
  max-height: 90vh;
  overflow: hidden;
  flex-direction: column;
  box-shadow: var(--shadow);
  color: var(--text);
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 50;
}

.modal:not(.hidden) { display: flex; }

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(2px);
  z-index: 40;
}

.modal { z-index: 50; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.modal-header h2 { font-size: 1.1rem; font-weight: 600; }

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.3rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  line-height: 1;
}
.modal-close:hover { color: var(--text); background: var(--bg-hover); }

.modal-body {
  overflow-y: auto;
  padding: 20px 24px;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  gap: 8px;
}

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

/* ============================================================
   Collapsible sections (recurrence, alarms)
   ============================================================ */
.collapsible {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
}

.collapsible summary {
  padding: 10px 14px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  user-select: none;
}
.collapsible summary:hover { background: var(--bg-hover); color: var(--text); }
.collapsible summary::before { content: "▶"; font-size: 10px; transition: transform 0.2s; }
details[open] summary::before { transform: rotate(90deg); }

.collapsible-body { padding: 14px; border-top: 1px solid var(--border); }

/* Weekday picker */
.weekday-picker {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.weekday-picker label {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 10px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  text-transform: none;
  letter-spacing: 0;
  color: var(--text-muted);
  transition: all var(--transition);
}
.weekday-picker label:has(input:checked) {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}
.weekday-picker input { display: none; }

/* ============================================================
   Alarm rows
   ============================================================ */
.alarm-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.alarm-row select {
  flex: 1;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 6px 10px;
  font-size: 13px;
  outline: none;
}

.alarm-row select:focus { border-color: var(--accent); }

.alarm-remove {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1rem;
  padding: 4px;
  border-radius: 4px;
}
.alarm-remove:hover { color: var(--danger); }

/* ============================================================
   FullCalendar overrides
   ============================================================ */
.fc {
  height: 100%;
  font-family: var(--font) !important;
}

/* Toolbar */
.fc .fc-toolbar { margin-bottom: 12px !important; }
.fc .fc-toolbar-title { font-size: 1.1rem !important; font-weight: 600 !important; color: var(--text) !important; }

.fc .fc-button {
  background: var(--bg-elevated) !important;
  border: 1px solid var(--border) !important;
  color: var(--text-muted) !important;
  border-radius: var(--radius-sm) !important;
  font-size: 12px !important;
  padding: 4px 10px !important;
  font-family: var(--font) !important;
}
.fc .fc-button:hover {
  background: var(--bg-hover) !important;
  color: var(--text) !important;
}
.fc .fc-button-primary:not(:disabled).fc-button-active {
  background: var(--accent) !important;
  border-color: var(--accent) !important;
  color: #fff !important;
}

/* Grid backgrounds */
.fc-theme-standard td, .fc-theme-standard th {
  border-color: var(--border) !important;
}
.fc .fc-daygrid-day, .fc .fc-timegrid-col {
  background: var(--bg) !important;
}
.fc .fc-day-today {
  background: var(--accent-dim) !important;
}
.fc .fc-col-header-cell-cushion,
.fc .fc-daygrid-day-number {
  color: var(--text-muted) !important;
  text-decoration: none !important;
}
.fc .fc-day-today .fc-daygrid-day-number {
  color: var(--accent) !important;
  font-weight: 700 !important;
}
.fc .fc-scrollgrid { border-color: var(--border) !important; }

/* Events */
.fc-event {
  border: none !important;
  border-radius: 5px !important;
  font-size: 12px !important;
  font-weight: 500 !important;
  padding: 1px 5px !important;
  cursor: pointer !important;
}
.fc-event:hover { filter: brightness(1.15) !important; }

/* Time grid */
.fc .fc-timegrid-slot { height: 36px !important; }
.fc .fc-timegrid-slot-label { color: var(--text-dim) !important; font-size: 11px !important; }

/* Now indicator */
.fc .fc-timegrid-now-indicator-line { border-color: var(--accent) !important; }
.fc .fc-timegrid-now-indicator-arrow { border-top-color: var(--accent) !important; border-bottom-color: var(--accent) !important; }

/* ============================================================
   Scrollbar
   ============================================================ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-dim); }