/* ── Calendar Engine — App Styles ────────────────────────────────────── */

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

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

button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* ── Header ───────────────────────────────────────────────────────────── */
.app-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: var(--col-header);
  color: var(--col-paper-light);
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  padding: 0 var(--sp-5);
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.hub-link {
  color: var(--col-paper-mid);
  text-decoration: none;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.03em;
  opacity: 0.8;
  transition: opacity var(--ease);
  white-space: nowrap;
}
.hub-link:hover { opacity: 1; color: var(--col-paper-light); }

.app-name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--col-paper-light);
  white-space: nowrap;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex: 1;
  flex-wrap: wrap;
}

/* View toggle */
.view-toggle {
  display: flex;
  background: var(--col-header-mid);
  border-radius: var(--r-md);
  padding: 2px;
  gap: 2px;
}
.view-toggle button {
  background: none;
  border: none;
  color: var(--col-paper-mid);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  transition: background var(--ease), color var(--ease);
}
.view-toggle button:hover { color: var(--col-paper-light); }
.view-toggle button.active {
  background: var(--col-rust);
  color: var(--col-white);
}

/* Date navigation */
.date-nav {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}
.date-nav button {
  background: none;
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--col-paper-mid);
  border-radius: var(--r-sm);
  padding: 4px 8px;
  font-size: 13px;
  transition: all var(--ease);
}
.date-nav button:hover {
  border-color: rgba(255,255,255,0.35);
  color: var(--col-paper-light);
}
#date-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--col-paper-light);
  min-width: 160px;
  text-align: center;
}

/* Timezone picker */
.tz-select select {
  background: var(--col-header-mid);
  color: var(--col-paper-mid);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--r-sm);
  padding: 4px 8px;
  font-size: 12px;
  cursor: pointer;
  transition: border-color var(--ease);
}
.tz-select select:hover { border-color: rgba(255,255,255,0.3); }

/* Action buttons */
.hdr-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-left: auto;
}
.hdr-actions button {
  background: none;
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--col-paper-mid);
  border-radius: var(--r-sm);
  padding: 4px 10px;
  font-size: 12px;
  transition: all var(--ease);
}
.hdr-actions button:hover {
  border-color: var(--col-rust-light);
  color: var(--col-paper-light);
}
.hdr-actions button.danger:hover {
  background: rgba(180, 69, 26, 0.2);
  border-color: var(--col-rust);
  color: var(--col-rust-light);
}

/* ── Main layout ──────────────────────────────────────────────────────── */
#calendar-root {
  margin-top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow: hidden;
}

/* ── Month view ───────────────────────────────────────────────────────── */
.month-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  grid-auto-rows: auto;       /* header row takes natural height */
  height: 100%;
  border-left: 1px solid var(--col-border);
  border-top: 1px solid var(--col-border);
  overflow-y: auto;
}

.month-col-header {
  background: var(--col-paper);
  border-right: 1px solid var(--col-border);
  border-bottom: 1px solid var(--col-border);
  padding: var(--sp-2) var(--sp-3);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--col-text-muted);
  text-align: center;
}

.month-cell {
  border-right: 1px solid var(--col-border);
  border-bottom: 1px solid var(--col-border);
  background: var(--col-paper-light);
  padding: var(--sp-2) var(--sp-2) var(--sp-1);
  min-height: 90px;
  cursor: pointer;
  transition: background var(--ease);
  overflow: hidden;
}
.month-cell:hover { background: #f8f2e8; }
.month-cell.other-month {
  background: var(--col-paper);
  opacity: 0.6;
}
.month-cell.today .day-num {
  background: var(--col-rust);
  color: var(--col-white);
}
.month-cell.focused {
  outline: 2px solid var(--col-rust);
  outline-offset: -2px;
}
.month-cell.drag-over {
  background: rgba(180, 69, 26, 0.06);
  outline: 2px dashed var(--col-rust);
  outline-offset: -2px;
}

.day-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 500;
  color: var(--col-text);
  margin-bottom: var(--sp-1);
  transition: background var(--ease), color var(--ease);
}

/* ── Event chips (month view) ─────────────────────────────────────────── */
.event-chip {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 2px 6px;
  border-radius: var(--r-sm);
  margin-bottom: 2px;
  font-size: 11.5px;
  cursor: pointer;
  border-left: 3px solid var(--ev-color, var(--col-rust));
  background: var(--ev-color-bg, var(--col-rust-dim));
  color: var(--col-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  user-select: none;
  transition: opacity var(--ease), transform var(--ease);
}
.event-chip:hover { opacity: 0.85; }
.event-chip.dragging { opacity: 0.4; }
.event-chip .ev-time {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--col-text-muted);
  flex-shrink: 0;
}
.event-chip .ev-title {
  overflow: hidden;
  text-overflow: ellipsis;
}
.event-chip.recurring::after {
  content: '↻';
  font-size: 9px;
  color: var(--col-text-muted);
  margin-left: auto;
  flex-shrink: 0;
}

.more-events {
  font-size: 11px;
  color: var(--col-text-muted);
  padding: 1px 6px;
  cursor: pointer;
}
.more-events:hover { color: var(--col-rust); }

/* ── Week / Day view ──────────────────────────────────────────────────── */
.week-wrap, .day-wrap {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.week-header-row {
  display: flex;
  border-bottom: 2px solid var(--col-border);
  background: var(--col-paper);
  flex-shrink: 0;
}

.time-gutter-pad {
  width: 60px;
  flex-shrink: 0;
  border-right: 1px solid var(--col-border-light);
}

.week-col-header {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--sp-2);
  border-right: 1px solid var(--col-border-light);
  cursor: pointer;
  transition: background var(--ease);
}
.week-col-header:hover { background: rgba(180, 69, 26, 0.04); }
.week-col-header.today .wch-num {
  background: var(--col-rust);
  color: var(--col-white);
}

.wch-day {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--col-text-muted);
}
.wch-num {
  font-size: 20px;
  font-weight: 300;
  color: var(--col-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  transition: background var(--ease), color var(--ease);
}
.wch-month {
  font-size: 11px;
  color: var(--col-text-muted);
  margin-top: 2px;
}

/* Week body */
.week-body {
  display: flex;
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-behavior: smooth;
  position: relative;
}

.time-gutter {
  width: 60px;
  flex-shrink: 0;
  position: relative;
  border-right: 1px solid var(--col-border-light);
  background: var(--col-paper);
}
.time-label {
  position: absolute;
  right: 8px;
  font-size: 10px;
  font-family: var(--font-mono);
  color: var(--col-text-muted);
  transform: translateY(-50%);
  user-select: none;
}

/* Grid lines overlay (inside bodyInner, which is already to the right of the gutter) */
.week-grid-lines {
  position: absolute;
  top: 0; left: 0; right: 0;
  pointer-events: none;
  z-index: 0;
}
.grid-line {
  position: absolute;
  left: 0; right: 0;
  height: 1px;
}
.grid-line.hour { background: var(--col-border-light); }
.grid-line.half { background: rgba(204, 195, 176, 0.4); }

/* Day columns wrapper — inline styles set position:absolute;inset:0;display:flex */
.week-cols {
  z-index: 1;
}

.week-day-col {
  flex: 1;
  border-right: 1px solid var(--col-border-light);
  position: relative;
  cursor: pointer;
  overflow: hidden;       /* clip events that overflow due to column width */
}
.week-day-col:last-child { border-right: none; }

/* Time slots (click / drop targets) */
.time-slot {
  position: absolute;
  left: 0; right: 0;
  z-index: 1;
  transition: background var(--ease);
}
.time-slot:hover { background: var(--col-slot-hover); }
.time-slot.drag-over { background: rgba(180, 69, 26, 0.08); }

/* Week events */
.week-event {
  position: absolute;
  z-index: 10;
  border-radius: var(--r-sm);
  border-left: 3px solid var(--ev-color, var(--col-rust));
  background: var(--ev-color-bg, var(--col-rust-dim));
  padding: 3px 6px;
  font-size: 11.5px;
  overflow: hidden;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 1px 3px rgba(42, 37, 31, 0.1);
  transition: box-shadow var(--ease), opacity var(--ease);
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-height: 20px;
}
.week-event:hover {
  box-shadow: 0 2px 8px rgba(42, 37, 31, 0.18);
  z-index: 11;
}
.week-event.dragging { opacity: 0.35; }
.week-event .ev-title {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.week-event .ev-time {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--col-text-muted);
  white-space: nowrap;
}
.week-event.recurring .ev-title::after {
  content: ' ↻';
  font-size: 9px;
  color: var(--col-text-muted);
}

/* ── Modal overlay ────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(42, 37, 31, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
  backdrop-filter: blur(1px);
}
.modal-overlay.hidden { display: none; }

.modal-card {
  background: var(--col-paper-light);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-modal);
  width: 480px;
  max-width: 95vw;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-5) var(--sp-6) var(--sp-4);
  border-bottom: 1px solid var(--col-border-light);
}
.modal-header h2 {
  font-size: 16px;
  font-weight: 600;
  color: var(--col-text);
}
.modal-close {
  background: none;
  border: none;
  font-size: 18px;
  color: var(--col-text-muted);
  line-height: 1;
  padding: 2px 6px;
  border-radius: var(--r-sm);
  transition: background var(--ease), color var(--ease);
}
.modal-close:hover { background: var(--col-border-light); color: var(--col-text); }

.modal-body {
  padding: var(--sp-5) var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.field-group label, .field-row label {
  font-size: 12px;
  font-weight: 500;
  color: var(--col-text-muted);
  letter-spacing: 0.03em;
}
.field-group input[type="text"],
.field-group input[type="date"],
.field-group input[type="time"],
.field-group input[type="number"],
.field-group select,
.field-row input,
.field-row select {
  background: var(--col-paper);
  border: 1px solid var(--col-border);
  border-radius: var(--r-md);
  padding: 7px 10px;
  font-size: 13px;
  color: var(--col-text);
  transition: border-color var(--ease);
  width: 100%;
}
.field-group input:focus,
.field-group select:focus,
.field-row input:focus,
.field-row select:focus {
  outline: none;
  border-color: var(--col-rust);
  box-shadow: 0 0 0 3px var(--col-focus-ring);
}

#ev-title {
  font-size: 16px;
  font-weight: 500;
  border: none;
  border-bottom: 2px solid var(--col-border);
  border-radius: 0;
  background: transparent;
  padding: var(--sp-2) 0;
}
#ev-title:focus {
  border-bottom-color: var(--col-rust);
  box-shadow: none;
}
#ev-title::placeholder { color: var(--col-border); }

.field-row {
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  align-items: center;
  gap: var(--sp-2);
}
.field-row.single { grid-template-columns: auto 1fr; }
.field-row.triple { grid-template-columns: auto 1fr auto; }

.rrule-section {
  border: 1px solid var(--col-border-light);
  border-radius: var(--r-md);
  padding: var(--sp-3);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  background: var(--col-paper);
}
.rrule-section.hidden { display: none; }

.byday-checks {
  display: flex;
  gap: var(--sp-1);
  flex-wrap: wrap;
}
.byday-checks label {
  display: flex;
  align-items: center;
  gap: 3px;
  font-size: 12px;
  cursor: pointer;
  padding: 3px 7px;
  border: 1px solid var(--col-border);
  border-radius: var(--r-sm);
  transition: all var(--ease);
}
.byday-checks label:has(input:checked) {
  background: var(--col-rust-dim);
  border-color: var(--col-rust);
  color: var(--col-rust);
}
.byday-checks input { display: none; }

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-6) var(--sp-5);
  border-top: 1px solid var(--col-border-light);
  gap: var(--sp-3);
}
.modal-actions { display: flex; gap: var(--sp-2); }

/* Buttons */
.btn-primary {
  background: var(--col-rust);
  color: var(--col-white);
  border: none;
  border-radius: var(--r-md);
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 500;
  transition: background var(--ease);
}
.btn-primary:hover { background: var(--col-rust-light); }

.btn-secondary {
  background: none;
  color: var(--col-text-muted);
  border: 1px solid var(--col-border);
  border-radius: var(--r-md);
  padding: 8px 16px;
  font-size: 13px;
  transition: all var(--ease);
}
.btn-secondary:hover { border-color: var(--col-rust); color: var(--col-rust); }

.btn-danger {
  background: none;
  color: #c0392b;
  border: 1px solid rgba(192,57,43,0.3);
  border-radius: var(--r-md);
  padding: 8px 14px;
  font-size: 13px;
  transition: all var(--ease);
}
.btn-danger:hover { background: rgba(192,57,43,0.08); border-color: #c0392b; }
.btn-danger.hidden { display: none; }

/* ── Recurring drag confirm ───────────────────────────────────────────── */
.recur-confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(42,37,31,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 600;
}
.recur-confirm-overlay.hidden { display: none; }

.recur-card {
  background: var(--col-paper-light);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-modal);
  padding: var(--sp-6);
  max-width: 340px;
  width: 90%;
}
.recur-card p {
  font-size: 14px;
  color: var(--col-text-muted);
  margin-bottom: var(--sp-4);
}
.recur-card strong {
  display: block;
  font-size: 15px;
  color: var(--col-text);
  margin-bottom: var(--sp-2);
}
.recur-card-actions {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.recur-card-actions button {
  background: var(--col-paper);
  border: 1px solid var(--col-border);
  border-radius: var(--r-md);
  padding: 9px 14px;
  font-size: 13px;
  color: var(--col-text);
  text-align: left;
  transition: all var(--ease);
}
.recur-card-actions button:hover {
  border-color: var(--col-rust);
  background: var(--col-rust-dim);
  color: var(--col-rust);
}
.recur-card-actions .rc-cancel {
  color: var(--col-text-muted);
  font-size: 12px;
  border: none;
  background: none;
  text-align: center;
  padding: 6px;
}
.recur-card-actions .rc-cancel:hover { color: var(--col-text); background: none; border: none; }

/* ── Drag feedback ────────────────────────────────────────────────────── */
.drag-preview {
  position: fixed;
  pointer-events: none;
  z-index: 999;
  opacity: 0.8;
  background: var(--col-paper-light);
  border-left: 3px solid var(--col-rust);
  border-radius: var(--r-sm);
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 500;
  box-shadow: var(--shadow-card);
  white-space: nowrap;
  transform: rotate(2deg);
}

/* ── Utility ──────────────────────────────────────────────────────────── */
.hidden { display: none !important; }

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

/* Focus trap */
[tabindex="-1"]:focus { outline: none; }

/* Empty state */
.empty-day {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 300px;
  color: var(--col-text-muted);
  font-size: 13px;
}