/* ==========================================================================
   LowFat Calendar — Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */

:root {
  --bg: #ffffff;
  --bg-secondary: #f8f9fa;
  --text: #202124;
  --text-muted: #5f6368;
  --border: #dadce0;
  --accent: #1a73e8;
  --accent-hover: #1557b0;
  --danger: #d93025;
  --cal-hour-height: 48px;
  --cal-header-height: 48px;
  --cal-gutter-width: 56px;
  --cal-now-color: #ea4335;
  --cal-sidebar-width: 200px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1e1e1e;
    --bg-secondary: #2d2d2d;
    --text: #e8eaed;
    --text-muted: #9aa0a6;
    --border: #3c4043;
    --accent: #8ab4f8;
    --accent-hover: #aecbfa;
    --danger: #f28b82;
  }
}

/* --------------------------------------------------------------------------
   Reset & Base
   -------------------------------------------------------------------------- */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover {
  background: var(--bg-secondary);
  text-decoration: none;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.btn--ghost {
  border-color: transparent;
  background: transparent;
}
.btn--ghost:hover {
  background: var(--bg-secondary);
}
.btn--active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn--danger {
  color: var(--danger);
  border-color: var(--danger);
  background: transparent;
}
.btn--danger:hover {
  background: var(--danger);
  color: #fff;
}
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   Site Header
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  height: 48px;
}

.site-header__inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 16px;
}

.site-header__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 600;
  font-size: 18px;
  text-decoration: none;
  flex-shrink: 0;
}
.site-header__logo:hover {
  text-decoration: none;
}

.site-header__account {
  color: var(--text-muted);
  font-size: 13px;
}

.site-header__logout {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  cursor: pointer;
  padding: 4px 8px;
}
.site-header__logout:hover {
  color: var(--danger);
}

/* --------------------------------------------------------------------------
   Calendar Navigation
   -------------------------------------------------------------------------- */

.cal-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.cal-nav__today {
  margin-right: 8px;
}

.cal-nav__arrow {
  font-size: 18px;
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: 50%;
}

.cal-nav__title {
  font-size: 16px;
  font-weight: 500;
  margin-left: 8px;
}

.cal-view-switcher {
  display: flex;
  gap: 2px;
  margin-right: auto;
}

/* --------------------------------------------------------------------------
   Account Switcher
   -------------------------------------------------------------------------- */

.account-switcher {
  position: relative;
  cursor: pointer;
}

.account-switcher__current {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-muted);
}
.account-switcher__current:hover {
  background: var(--bg-secondary);
}

.account-switcher__dropdown {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  min-width: 200px;
  z-index: 200;
  padding: 4px 0;
}

.account-switcher:focus-within .account-switcher__dropdown {
  display: block;
}

.account-switcher__item {
  display: block;
  padding: 8px 16px;
  color: var(--text);
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-family: inherit;
}
.account-switcher__item:hover {
  background: var(--bg-secondary);
  text-decoration: none;
}
.account-switcher__item--active {
  font-weight: 600;
}
.account-switcher__divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}
.account-switcher__logout {
  color: var(--danger);
}

/* --------------------------------------------------------------------------
   Calendar Layout
   -------------------------------------------------------------------------- */

.cal-layout {
  display: flex;
  height: calc(100vh - 48px);
  overflow: hidden;
}

/* --------------------------------------------------------------------------
   Calendar Sidebar
   -------------------------------------------------------------------------- */

.cal-sidebar {
  width: var(--cal-sidebar-width);
  border-right: 1px solid var(--border);
  padding: 16px;
  overflow-y: auto;
  flex-shrink: 0;
}

.cal-sidebar__heading {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.cal-sidebar__list {
  list-style: none;
}

.cal-sidebar__item {
  margin-bottom: 2px;
}

.cal-sidebar__label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  cursor: pointer;
  font-size: 13px;
}

.cal-sidebar__checkbox {
  accent-color: var(--cal-color, var(--accent));
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.cal-sidebar__name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cal-sidebar__badge {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Calendar Grid (Week / Day)
   -------------------------------------------------------------------------- */

.cal-grid {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* All-day events */
.cal-allday {
  display: flex;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.cal-allday__gutter {
  width: var(--cal-gutter-width);
  font-size: 11px;
  color: var(--text-muted);
  padding: 4px 8px;
  text-align: right;
  flex-shrink: 0;
}

.cal-allday__row {
  display: grid;
  flex: 1;
  gap: 1px;
  padding: 4px 0;
  min-height: 28px;
}

.cal-allday__cell {
  display: flex;
  flex-wrap: wrap;
  gap: 2px;
  padding: 0 2px;
}

/* Day headers */
.cal-day-headers {
  display: grid;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.cal-day-headers__gutter {
  /* empty spacer matching gutter width */
}

.cal-day-headers__cell {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px 0;
  font-size: 13px;
  color: var(--text-muted);
  border-left: 1px solid var(--border);
}

.cal-day-headers__cell--today {
  color: var(--accent);
  font-weight: 600;
}

/* Time grid body */
.cal-timegrid {
  flex: 1;
  overflow-y: auto;
}

.cal-timegrid__body {
  display: grid;
  position: relative;
  min-height: calc(var(--cal-hour-height) * 24);
}

.cal-timegrid__gutter {
  position: relative;
  width: var(--cal-gutter-width);
}

.cal-timegrid__hour-label {
  position: absolute;
  right: 8px;
  transform: translateY(-50%);
  font-size: 11px;
  color: var(--text-muted);
  pointer-events: none;
}

.cal-timegrid__col {
  position: relative;
  border-left: 1px solid var(--border);
  min-height: calc(var(--cal-hour-height) * 24);
}

.cal-timegrid__col--today {
  background: color-mix(in srgb, var(--accent) 4%, var(--bg));
}

.cal-timegrid__hour-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
  border-top: 1px solid var(--border);
  pointer-events: none;
}

/* Now indicator */
.cal-now-indicator {
  position: absolute;
  left: -4px;
  right: 0;
  height: 2px;
  background: var(--cal-now-color);
  z-index: 10;
  pointer-events: none;
}

.cal-now-indicator::before {
  content: '';
  position: absolute;
  left: 0;
  top: -4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cal-now-color);
}

/* Dragging state */
.cal-grid--dragging {
  cursor: ns-resize;
  user-select: none;
}

.cal-grid--dragging .cal-timegrid__col {
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   Calendar Events
   -------------------------------------------------------------------------- */

.cal-event {
  border-radius: 4px;
  font-size: 12px;
  line-height: 1.3;
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow 0.1s;
}
.cal-event:hover {
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

/* Timed events (positioned in day columns) */
.cal-event--timed {
  position: absolute;
  left: 0;
  right: 0;
  padding: 2px 4px;
  background: color-mix(in srgb, var(--cal-color, var(--accent)) 85%, var(--bg));
  border-left: 3px solid var(--cal-color, var(--accent));
  color: var(--text);
  z-index: 5;
}

@media (prefers-color-scheme: dark) {
  .cal-event--timed {
    background: color-mix(in srgb, var(--cal-color, var(--accent)) 30%, var(--bg));
  }
}

.cal-event__time {
  font-size: 11px;
  opacity: 0.8;
}

.cal-event__title {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Resize handle at bottom of timed events */
.cal-event__resize-handle {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 8px;
  cursor: ns-resize;
}
.cal-event__resize-handle:hover {
  background: rgba(0,0,0,0.1);
  border-radius: 0 0 4px 4px;
}

/* Drag preview (new event creation) */
.cal-event--preview {
  background: color-mix(in srgb, var(--accent) 30%, var(--bg));
  border-left: 3px solid var(--accent);
  opacity: 0.8;
  pointer-events: none;
}

/* Event being dragged */
.cal-event--dragging {
  opacity: 0.5;
}

/* All-day events */
.cal-event--allday {
  background: color-mix(in srgb, var(--cal-color, var(--accent)) 85%, var(--bg));
  border-left: 3px solid var(--cal-color, var(--accent));
  padding: 1px 4px;
  font-size: 11px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (prefers-color-scheme: dark) {
  .cal-event--allday {
    background: color-mix(in srgb, var(--cal-color, var(--accent)) 30%, var(--bg));
  }
}

/* Month view events */
.cal-event--month {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 1px 4px;
  font-size: 11px;
  border-radius: 3px;
}
.cal-event--month:hover {
  background: color-mix(in srgb, var(--cal-color, var(--accent)) 20%, var(--bg));
}

.cal-event__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cal-color, var(--accent));
  flex-shrink: 0;
}

.cal-event__text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* --------------------------------------------------------------------------
   Month View
   -------------------------------------------------------------------------- */

.cal-month {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.cal-month__header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  border-bottom: 1px solid var(--border);
}

.cal-month__weekday {
  padding: 8px 4px;
  text-align: center;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
}

.cal-month__grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  grid-template-rows: repeat(6, 1fr);
  flex: 1;
}

.cal-month__cell {
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 4px;
  min-height: 80px;
  overflow: hidden;
}

.cal-month__cell--outside {
  opacity: 0.5;
}

.cal-month__cell--today .cal-month__date {
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cal-month__date {
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 4px;
}

.cal-month__events {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.cal-month__more {
  font-size: 11px;
  color: var(--text-muted);
  padding: 1px 4px;
  cursor: pointer;
}
.cal-month__more:hover {
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   Event Dialog
   -------------------------------------------------------------------------- */

.event-dialog__overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.event-dialog {
  background: var(--bg);
  border-radius: 8px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  width: 400px;
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
}

.event-dialog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 8px;
}

.event-dialog__header h3 {
  font-size: 18px;
  font-weight: 500;
}

.event-dialog__body {
  padding: 8px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.event-dialog__input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 14px;
  font-family: inherit;
  background: var(--bg);
  color: var(--text);
}
.event-dialog__input:focus {
  outline: none;
  border-color: var(--accent);
}

.event-dialog__input--title {
  font-size: 18px;
  font-weight: 500;
  border: none;
  border-bottom: 2px solid var(--border);
  border-radius: 0;
  padding: 8px 0;
}
.event-dialog__input--title:focus {
  border-bottom-color: var(--accent);
}

.event-dialog__textarea {
  resize: vertical;
  min-height: 60px;
}

.event-dialog__row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.event-dialog__row label {
  font-size: 13px;
  color: var(--text-muted);
  width: 48px;
  flex-shrink: 0;
}

.event-dialog__error {
  color: var(--danger);
  font-size: 13px;
}

.event-dialog__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

.event-dialog__actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
  .cal-sidebar {
    display: none;
  }
  .cal-view-switcher {
    display: none;
  }
  :root {
    --cal-gutter-width: 40px;
    --cal-hour-height: 40px;
  }
}