/* ═══════════════════════════════════════════════════════════════
   CALENDAR PREMIUM CSS — Material Design 3 + Superior UX
   PhD-Level Calendar Interface Styling
   Version: 3.0 — Feb 2026
   ═══════════════════════════════════════════════════════════════ */

/* ── ROOT VARIABLES (Material Design 3 Tokens) ── */
:root {
  /* Primary Colors */
  --cal-primary: #10b981;
  --cal-primary-hover: #059669;
  --cal-primary-light: rgba(16, 185, 129, 0.1);
  
  /* Surface Colors */
  --cal-surface: #1a1a1a;
  --cal-surface-elevated: #242424;
  --cal-surface-hover: #2a2a2a;
  
  /* Text Colors */
  --cal-text-primary: rgba(255, 255, 255, 0.95);
  --cal-text-secondary: rgba(255, 255, 255, 0.7);
  --cal-text-tertiary: rgba(255, 255, 255, 0.5);
  
  /* Border Colors */
  --cal-border: rgba(255, 255, 255, 0.1);
  --cal-border-strong: rgba(255, 255, 255, 0.2);
  
  /* Semantic Colors */
  --cal-success: #10b981;
  --cal-warning: #f59e0b;
  --cal-error: #ef4444;
  --cal-info: #3b82f6;
  
  /* Shadows */
  --cal-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --cal-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --cal-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --cal-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
  
  /* Transitions */
  --cal-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --cal-transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Spacing */
  --cal-spacing-xs: 4px;
  --cal-spacing-sm: 8px;
  --cal-spacing-md: 16px;
  --cal-spacing-lg: 24px;
  --cal-spacing-xl: 32px;
  
  /* Typography */
  --cal-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
  --cal-font-size-xs: 11px;
  --cal-font-size-sm: 12px;
  --cal-font-size-base: 14px;
  --cal-font-size-lg: 16px;
  --cal-font-size-xl: 20px;
  --cal-font-size-2xl: 24px;
  
  /* Border Radius */
  --cal-radius-sm: 4px;
  --cal-radius-md: 8px;
  --cal-radius-lg: 12px;
  --cal-radius-xl: 16px;
  --cal-radius-full: 9999px;
}

/* ── MAIN CONTAINER ── */
.cal-premium {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--cal-surface);
  font-family: var(--cal-font-family);
  color: var(--cal-text-primary);
  overflow: hidden;
}

.cal-premium-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 400px;
  gap: var(--cal-spacing-md);
  color: var(--cal-text-secondary);
}

/* ── HEADER ── */
.cal-premium-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--cal-spacing-lg);
  background: var(--cal-surface-elevated);
  border-bottom: 1px solid var(--cal-border);
  gap: var(--cal-spacing-lg);
  flex-wrap: wrap;
}

.cal-header-left {
  display: flex;
  align-items: center;
  gap: var(--cal-spacing-md);
}

.cal-header-title {
  font-size: var(--cal-font-size-2xl);
  font-weight: 600;
  margin: 0;
  color: var(--cal-text-primary);
}

.cal-btn-today {
  padding: var(--cal-spacing-sm) var(--cal-spacing-md);
  background: var(--cal-surface-hover);
  border: 1px solid var(--cal-border);
  border-radius: var(--cal-radius-md);
  color: var(--cal-text-primary);
  font-size: var(--cal-font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-btn-today:hover {
  background: var(--cal-primary-light);
  border-color: var(--cal-primary);
  color: var(--cal-primary);
}

.cal-header-center {
  display: flex;
  align-items: center;
  gap: var(--cal-spacing-sm);
}

.cal-nav-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--cal-border);
  border-radius: var(--cal-radius-md);
  color: var(--cal-text-secondary);
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-nav-btn:hover {
  background: var(--cal-surface-hover);
  border-color: var(--cal-border-strong);
  color: var(--cal-text-primary);
}

.cal-header-right {
  display: flex;
  align-items: center;
  gap: var(--cal-spacing-md);
}

.cal-search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.cal-search-icon {
  position: absolute;
  left: var(--cal-spacing-md);
  color: var(--cal-text-tertiary);
  pointer-events: none;
}

.cal-search-input {
  padding: var(--cal-spacing-sm) var(--cal-spacing-md) var(--cal-spacing-sm) 40px;
  background: var(--cal-surface);
  border: 1px solid var(--cal-border);
  border-radius: var(--cal-radius-md);
  color: var(--cal-text-primary);
  font-size: var(--cal-font-size-sm);
  width: 240px;
  transition: var(--cal-transition);
}

.cal-search-input:focus {
  outline: none;
  border-color: var(--cal-primary);
  background: var(--cal-surface-elevated);
}

.cal-btn-create {
  display: flex;
  align-items: center;
  gap: var(--cal-spacing-sm);
  padding: var(--cal-spacing-sm) var(--cal-spacing-lg);
  background: var(--cal-primary);
  border: none;
  border-radius: var(--cal-radius-md);
  color: white;
  font-size: var(--cal-font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--cal-transition);
  box-shadow: var(--sh-2c36c2);
}

.cal-btn-create:hover {
  background: var(--cal-primary-hover);
  box-shadow: var(--sh-9a05f1);
  transform: translateY(-1px);
}

/* ── VIEW SELECTOR ── */
.cal-view-selector {
  display: flex;
  gap: var(--cal-spacing-xs);
  padding: var(--cal-spacing-md) var(--cal-spacing-lg);
  background: var(--cal-surface);
  border-bottom: 1px solid var(--cal-border);
}

.cal-view-btn {
  padding: var(--cal-spacing-sm) var(--cal-spacing-lg);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--cal-radius-md);
  color: var(--cal-text-secondary);
  font-size: var(--cal-font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-view-btn:hover {
  background: var(--cal-surface-hover);
  color: var(--cal-text-primary);
}

.cal-view-btn.active {
  background: var(--cal-primary-light);
  border-color: var(--cal-primary);
  color: var(--cal-primary);
}

/* ── WEEK VIEW ── */
.cal-week-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.cal-allday-section {
  display: flex;
  border-bottom: 1px solid var(--cal-border);
  background: var(--cal-surface-elevated);
}

.cal-allday-label {
  width: 60px;
  padding: var(--cal-spacing-sm);
  font-size: var(--cal-font-size-xs);
  color: var(--cal-text-tertiary);
  text-align: right;
  border-right: 1px solid var(--cal-border);
}

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

.cal-allday-cell {
  padding: var(--cal-spacing-xs);
  border-right: 1px solid var(--cal-border);
  min-height: 40px;
}

.cal-allday-cell:last-child {
  border-right: none;
}

.cal-allday-event {
  padding: var(--cal-spacing-xs) var(--cal-spacing-sm);
  margin-bottom: var(--cal-spacing-xs);
  background: var(--cal-primary);
  border-radius: var(--cal-radius-sm);
  font-size: var(--cal-font-size-xs);
  font-weight: 500;
  color: white;
  cursor: pointer;
  transition: var(--cal-transition);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cal-allday-event:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: var(--sh-2c36c2);
}

.cal-week-grid-container {
  flex: 1;
  display: flex;
  overflow-y: auto;
  overflow-x: hidden;
}

.cal-time-labels {
  width: 60px;
  border-right: 1px solid var(--cal-border);
  background: var(--cal-surface-elevated);
}

.cal-time-label {
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding-right: var(--cal-spacing-sm);
  padding-top: 2px;
  font-size: var(--cal-font-size-xs);
  color: var(--cal-text-tertiary);
  border-bottom: 1px solid var(--cal-border);
}

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

.cal-week-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  border-bottom: 2px solid var(--cal-border-strong);
  background: var(--cal-surface-elevated);
  position: sticky;
  top: 0;
  z-index: 10;
}

.cal-day-header {
  padding: var(--cal-spacing-md);
  text-align: center;
  border-right: 1px solid var(--cal-border);
}

.cal-day-header:last-child {
  border-right: none;
}

.cal-day-header.today {
  background: var(--cal-primary-light);
}

.cal-day-name {
  font-size: var(--cal-font-size-xs);
  color: var(--cal-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

.cal-day-number {
  font-size: var(--cal-font-size-xl);
  font-weight: 600;
  color: var(--cal-text-primary);
  margin-top: var(--cal-spacing-xs);
}

.cal-today-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--cal-primary);
  color: white;
  border-radius: var(--cal-radius-full);
}

.cal-week-body {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  position: relative;
}

.cal-day-column {
  position: relative;
  border-right: 1px solid var(--cal-border);
}

.cal-day-column:last-child {
  border-right: none;
}

.cal-today-column {
  background: var(--c-bg-10b98105);
}

.cal-time-slot {
  border-bottom: 1px solid var(--cal-border);
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-time-slot:hover {
  background: var(--cal-surface-hover);
}

.cal-current-time {
  position: absolute;
  left: 0;
  right: 0;
  z-index: 5;
  pointer-events: none;
}

.cal-current-time-dot {
  position: absolute;
  left: -6px;
  top: -6px;
  width: 12px;
  height: 12px;
  background: var(--cal-error);
  border-radius: var(--cal-radius-full);
  border: 2px solid var(--cal-surface);
  box-shadow: var(--sh-9a05f1);
}

.cal-current-time-line {
  height: 2px;
  background: var(--cal-error);
  box-shadow: var(--sh-0c4592);
}

/* ── EVENTS ── */
.cal-event {
  position: absolute;
  left: 2px;
  right: 2px;
  padding: var(--cal-spacing-xs) var(--cal-spacing-sm);
  border-radius: var(--cal-radius-sm);
  border-left: 3px solid;
  cursor: pointer;
  transition: var(--cal-transition);
  overflow: hidden;
  z-index: 1;
  -webkit-backdrop-filter: var(--bf-159459);
  backdrop-filter: var(--bf-159459);
}

.cal-event:hover {
  z-index: 2;
  box-shadow: var(--sh-0ada32);
  transform: scale(1.02);
}

.cal-event-time {
  font-size: var(--cal-font-size-xs);
  font-weight: 600;
  color: var(--c-fg-ffffffe6);
  margin-bottom: 2px;
}

.cal-event-title {
  font-size: var(--cal-font-size-sm);
  font-weight: 500;
  color: white;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cal-event-location {
  font-size: var(--cal-font-size-xs);
  color: var(--c-fg-ffffffb3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-top: 2px;
}

.cal-event-resize-handle {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 8px;
  cursor: ns-resize;
  opacity: 0;
  transition: var(--cal-transition);
}

.cal-event:hover .cal-event-resize-handle {
  opacity: 1;
  background: var(--c-bg-ffffff33);
}

/* ── MONTH VIEW ── */
.cal-month-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.cal-month-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background: var(--cal-surface-elevated);
  border-bottom: 2px solid var(--cal-border-strong);
}

.cal-month-day-header {
  padding: var(--cal-spacing-md);
  text-align: center;
  font-size: var(--cal-font-size-sm);
  font-weight: 600;
  color: var(--cal-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.cal-month-grid {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.cal-month-week {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  flex: 1;
  min-height: 120px;
}

.cal-month-cell {
  border-right: 1px solid var(--cal-border);
  border-bottom: 1px solid var(--cal-border);
  padding: var(--cal-spacing-sm);
  cursor: pointer;
  transition: var(--cal-transition);
  overflow: hidden;
}

.cal-month-cell:hover {
  background: var(--cal-surface-hover);
}

.cal-month-cell.today {
  background: var(--cal-primary-light);
}

.cal-month-cell.other-month {
  opacity: 0.4;
}

.cal-month-cell-header {
  margin-bottom: var(--cal-spacing-sm);
}

.cal-month-day-number {
  font-size: var(--cal-font-size-base);
  font-weight: 600;
  color: var(--cal-text-primary);
}

.cal-month-day-number.today-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--cal-primary);
  color: white;
  border-radius: var(--cal-radius-full);
}

.cal-month-cell-events {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cal-month-event {
  display: flex;
  align-items: center;
  gap: var(--cal-spacing-xs);
  padding: 2px var(--cal-spacing-xs);
  background: var(--cal-surface-elevated);
  border-left: 3px solid;
  border-radius: var(--cal-radius-sm);
  font-size: var(--cal-font-size-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: var(--cal-transition);
}

.cal-month-event:hover {
  background: var(--cal-surface-hover);
  transform: translateX(2px);
}

.cal-month-event-time {
  font-weight: 600;
  color: var(--cal-text-secondary);
}

.cal-month-event-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--cal-text-primary);
}

.cal-month-more {
  padding: 2px var(--cal-spacing-xs);
  font-size: var(--cal-font-size-xs);
  color: var(--cal-text-secondary);
  font-weight: 500;
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-month-more:hover {
  color: var(--cal-primary);
}

/* ── DAY VIEW ── */
.cal-day-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.cal-day-allday-section {
  padding: var(--cal-spacing-md);
  border-bottom: 1px solid var(--cal-border);
  background: var(--cal-surface-elevated);
}

.cal-day-grid-container {
  flex: 1;
  display: flex;
  overflow-y: auto;
}

/* ── AGENDA VIEW ── */
.cal-agenda-view {
  flex: 1;
  overflow-y: auto;
  padding: var(--cal-spacing-lg);
}

.cal-agenda-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 400px;
  color: var(--cal-text-tertiary);
  gap: var(--cal-spacing-md);
}

.cal-agenda-day {
  margin-bottom: var(--cal-spacing-xl);
}

.cal-agenda-day.today .cal-agenda-date {
  background: var(--cal-primary-light);
  border-left: 4px solid var(--cal-primary);
}

.cal-agenda-date {
  display: flex;
  align-items: center;
  gap: var(--cal-spacing-md);
  padding: var(--cal-spacing-md);
  background: var(--cal-surface-elevated);
  border-radius: var(--cal-radius-lg);
  margin-bottom: var(--cal-spacing-md);
}

.cal-agenda-date-day {
  font-size: var(--fs-32);
  font-weight: 700;
  color: var(--cal-text-primary);
  width: 50px;
  text-align: center;
}

.cal-agenda-date-weekday {
  font-size: var(--cal-font-size-lg);
  font-weight: 600;
  color: var(--cal-text-primary);
}

.cal-agenda-date-month {
  font-size: var(--cal-font-size-sm);
  color: var(--cal-text-secondary);
}

.cal-agenda-events {
  display: flex;
  flex-direction: column;
  gap: var(--cal-spacing-sm);
  padding-left: var(--cal-spacing-xl);
}

.cal-agenda-event {
  display: flex;
  gap: var(--cal-spacing-md);
  padding: var(--cal-spacing-md);
  background: var(--cal-surface-elevated);
  border-left: 4px solid;
  border-radius: var(--cal-radius-lg);
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-agenda-event:hover {
  background: var(--cal-surface-hover);
  transform: translateX(4px);
  box-shadow: var(--sh-9a05f1);
}

.cal-agenda-event-time {
  min-width: 100px;
  font-size: var(--cal-font-size-sm);
  font-weight: 600;
  color: var(--cal-text-secondary);
}

.cal-agenda-event-content {
  flex: 1;
}

.cal-agenda-event-title {
  font-size: var(--cal-font-size-base);
  font-weight: 600;
  color: var(--cal-text-primary);
  margin-bottom: var(--cal-spacing-xs);
}

.cal-agenda-event-location {
  font-size: var(--cal-font-size-sm);
  color: var(--cal-text-secondary);
  margin-bottom: var(--cal-spacing-xs);
}

.cal-agenda-event-description {
  font-size: var(--cal-font-size-sm);
  color: var(--cal-text-tertiary);
  line-height: 1.5;
}

/* ── MODALS ── */
.cal-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cal-modal.hidden {
  display: none;
}

.cal-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--c-bg-000000b3);
  -webkit-backdrop-filter: var(--bf-87369b);
  backdrop-filter: var(--bf-87369b);
}

.cal-modal-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
  background: var(--cal-surface-elevated);
  border-radius: var(--cal-radius-xl);
  box-shadow: var(--sh-97c720);
}

.cal-event-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--cal-spacing-lg);
  border-bottom: 1px solid var(--cal-border);
}

.cal-event-detail-header h2 {
  margin: 0;
  font-size: var(--cal-font-size-xl);
  font-weight: 600;
  color: var(--cal-text-primary);
}

.cal-event-detail-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--cal-radius-md);
  color: var(--cal-text-secondary);
  font-size: var(--fs-24);
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-event-detail-close:hover {
  background: var(--cal-surface-hover);
  color: var(--cal-text-primary);
}

.cal-event-detail-body {
  padding: var(--cal-spacing-lg);
}

.cal-event-detail-row {
  display: flex;
  gap: var(--cal-spacing-md);
  margin-bottom: var(--cal-spacing-lg);
}

.cal-event-detail-row svg {
  flex-shrink: 0;
  color: var(--cal-text-secondary);
}

.cal-event-detail-meta {
  font-size: var(--cal-font-size-sm);
  color: var(--cal-text-secondary);
  margin-top: var(--cal-spacing-xs);
}

.cal-event-link {
  color: var(--cal-primary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--cal-transition);
}

.cal-event-link:hover {
  text-decoration: underline;
}

.cal-event-detail-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--cal-spacing-md);
  padding: var(--cal-spacing-lg);
  border-top: 1px solid var(--cal-border);
}

/* ── QUICK CREATE ── */
.cal-quick-create {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cal-quick-create.hidden {
  display: none;
}

.cal-quick-create-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--c-bg-000000b3);
  -webkit-backdrop-filter: var(--bf-87369b);
  backdrop-filter: var(--bf-87369b);
}

.cal-quick-create-panel {
  position: relative;
  z-index: 1;
  width: 500px;
  max-width: 90%;
  background: var(--cal-surface-elevated);
  border-radius: var(--cal-radius-xl);
  box-shadow: var(--sh-97c720);
}

.cal-quick-create-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--cal-spacing-lg);
  border-bottom: 1px solid var(--cal-border);
}

.cal-quick-create-header h3 {
  margin: 0;
  font-size: var(--cal-font-size-xl);
  font-weight: 600;
  color: var(--cal-text-primary);
}

.cal-quick-create-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--cal-radius-md);
  color: var(--cal-text-secondary);
  font-size: var(--fs-24);
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-quick-create-close:hover {
  background: var(--cal-surface-hover);
  color: var(--cal-text-primary);
}

.cal-quick-create-body {
  padding: var(--cal-spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--cal-spacing-md);
}

.cal-quick-input {
  padding: var(--cal-spacing-md);
  background: var(--cal-surface);
  border: 1px solid var(--cal-border);
  border-radius: var(--cal-radius-md);
  color: var(--cal-text-primary);
  font-size: var(--cal-font-size-base);
  font-family: var(--cal-font-family);
  transition: var(--cal-transition);
}

.cal-quick-input:focus {
  outline: none;
  border-color: var(--cal-primary);
  background: var(--cal-surface-elevated);
}

.cal-quick-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--cal-spacing-sm);
}

.cal-quick-textarea {
  padding: var(--cal-spacing-md);
  background: var(--cal-surface);
  border: 1px solid var(--cal-border);
  border-radius: var(--cal-radius-md);
  color: var(--cal-text-primary);
  font-size: var(--cal-font-size-base);
  font-family: var(--cal-font-family);
  resize: vertical;
  transition: var(--cal-transition);
}

.cal-quick-textarea:focus {
  outline: none;
  border-color: var(--cal-primary);
  background: var(--cal-surface-elevated);
}

.cal-quick-create-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--cal-spacing-md);
  padding: var(--cal-spacing-lg);
  border-top: 1px solid var(--cal-border);
}

/* ── BUTTONS ── */
.cal-btn-primary {
  padding: var(--cal-spacing-sm) var(--cal-spacing-lg);
  background: var(--cal-primary);
  border: none;
  border-radius: var(--cal-radius-md);
  color: white;
  font-size: var(--cal-font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-btn-primary:hover {
  background: var(--cal-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--sh-9a05f1);
}

.cal-btn-secondary {
  padding: var(--cal-spacing-sm) var(--cal-spacing-lg);
  background: transparent;
  border: 1px solid var(--cal-border);
  border-radius: var(--cal-radius-md);
  color: var(--cal-text-primary);
  font-size: var(--cal-font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-btn-secondary:hover {
  background: var(--cal-surface-hover);
  border-color: var(--cal-border-strong);
}

.cal-btn-danger {
  padding: var(--cal-spacing-sm) var(--cal-spacing-lg);
  background: var(--cal-error);
  border: none;
  border-radius: var(--cal-radius-md);
  color: white;
  font-size: var(--cal-font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--cal-transition);
}

.cal-btn-danger:hover {
  background: var(--c-bg-dc2626ff);
  transform: translateY(-1px);
  box-shadow: var(--sh-9a05f1);
}

/* ── EMPTY STATE ── */
.cal-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 400px;
  gap: var(--cal-spacing-lg);
  color: var(--cal-text-secondary);
}

.cal-empty-state svg {
  color: var(--cal-text-tertiary);
}

.cal-empty-state h3 {
  margin: 0;
  font-size: var(--cal-font-size-xl);
  font-weight: 600;
  color: var(--cal-text-primary);
}

.cal-empty-state p {
  margin: 0;
  font-size: var(--cal-font-size-base);
  color: var(--cal-text-secondary);
  text-align: center;
  max-width: 400px;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .cal-premium-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .cal-header-left,
  .cal-header-center,
  .cal-header-right {
    width: 100%;
    justify-content: space-between;
  }
  
  .cal-search-input {
    width: 100%;
  }
  
  .cal-week-view {
    overflow-x: auto;
  }
  
  .cal-month-week {
    min-height: 80px;
  }
  
  .cal-quick-create-panel {
    width: 100%;
    max-width: 100%;
    border-radius: var(--cal-radius-lg) var(--cal-radius-lg) 0 0;
    position: absolute;
    bottom: 0;
  }
}

/* ── ACCESSIBILITY ── */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ── SCROLLBAR STYLING ── */
.cal-week-grid-container::-webkit-scrollbar,
.cal-month-grid::-webkit-scrollbar,
.cal-agenda-view::-webkit-scrollbar,
.cal-modal-content::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.cal-week-grid-container::-webkit-scrollbar-track,
.cal-month-grid::-webkit-scrollbar-track,
.cal-agenda-view::-webkit-scrollbar-track,
.cal-modal-content::-webkit-scrollbar-track {
  background: var(--cal-surface);
}

.cal-week-grid-container::-webkit-scrollbar-thumb,
.cal-month-grid::-webkit-scrollbar-thumb,
.cal-agenda-view::-webkit-scrollbar-thumb,
.cal-modal-content::-webkit-scrollbar-thumb {
  background: var(--cal-border-strong);
  border-radius: var(--cal-radius-sm);
}

.cal-week-grid-container::-webkit-scrollbar-thumb:hover,
.cal-month-grid::-webkit-scrollbar-thumb:hover,
.cal-agenda-view::-webkit-scrollbar-thumb:hover,
.cal-modal-content::-webkit-scrollbar-thumb:hover {
  background: var(--cal-text-tertiary);
}

/* ═══ SOTA v4.0 components ═══ */
.cal-nextup{display:flex;align-items:center;gap:12px;margin:10px 14px;padding:12px 14px;border-radius:14px;background:var(--bgi-5b52b8);border:1px solid var(--c-bd-10b9814d);cursor:pointer;transition:transform .15s}
.cal-nextup:active{transform:scale(.98)}
.cal-nextup-icon{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:var(--fs-20);flex-shrink:0}
.cal-nextup-label{font-size:var(--fs-10);text-transform:uppercase;letter-spacing:.8px;color:var(--c-fg-10b981ff);font-weight:700}
.cal-nextup-title{font-size:var(--fs-15);font-weight:600;color:var(--text1,var(--c-fg-e5e7ebff))}
.cal-nextup-time{font-size:var(--fs-12);color:var(--text3,var(--c-fg-9ca3afff))}
.cal-nextup-info{flex:1;min-width:0}
.cal-nextup-count{font-size:var(--fs-12);font-weight:700;color:var(--c-fg-10b981ff);background:var(--c-bg-10b98126);padding:6px 10px;border-radius:20px;white-space:nowrap}
.cal-weekstrip{display:flex;gap:4px;padding:6px 14px;overflow-x:auto}
.cal-ws-day{flex:1;min-width:44px;display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 4px;border-radius:12px;border:none;background:transparent;color:var(--text3,var(--c-fg-9ca3afff));cursor:pointer}
.cal-ws-day.today{background:var(--c-bg-10b98126);color:var(--c-fg-10b981ff)}
.cal-ws-wd{font-size:var(--fs-10);text-transform:uppercase}
.cal-ws-num{font-size:var(--fs-16);font-weight:700}
.cal-ws-dots{font-size:var(--fs-8);color:var(--c-fg-10b981ff);min-height:8px}
.cal-nlp{position:relative;display:flex;gap:8px;padding:8px 14px 0}
.cal-nlp-input{flex:1;background:var(--bg-tertiary,var(--c-bg-1f2937ff));border:1px solid var(--border,var(--c-bd-374151ff));border-radius:12px;padding:10px 14px;color:var(--text1,var(--c-fg-e5e7ebff));font-size:var(--fs-15);outline:none}
.cal-nlp-input:focus{border-color:var(--c-bd-10b981ff)}
.cal-nlp-btn{background:var(--c-bg-10b981ff);color:var(--c-fg-ffffffff);border:none;border-radius:12px;padding:0 16px;font-weight:600;cursor:pointer}
.cal-nlp-hint{position:absolute;top:100%;left:14px;right:14px;font-size:var(--fs-12);color:var(--c-fg-10b981ff);padding:4px 6px;z-index:5}
.cal-fab{display:none;position:fixed;right:16px;bottom:150px;width:52px;height:52px;border-radius:50%;background:var(--c-bg-10b981ff);color:var(--c-fg-ffffffff);border:none;font-size:var(--fs-26);line-height:1;cursor:pointer;box-shadow:var(--sh-039bf6);z-index:60}
.cal-countdown-chip{font-size:var(--fs-10);font-weight:700;color:var(--c-fg-10b981ff);background:var(--c-bg-10b98124);border-radius:10px;padding:2px 7px;margin-left:6px}
.cal-conflict{margin-left:4px}
.cal-ev-icon{margin-right:4px}
@media(max-width:768px){
  .cal-fab{display:flex;align-items:center;justify-content:center}
  .cal-btn-create span{display:none}
  .cal-premium-header{padding:10px 12px;flex-wrap:wrap}
  .cal-header-title{font-size:var(--fs-18)}
  .cal-agenda-event{padding:10px 12px}
  .cal-agenda-date-day{font-size:var(--fs-22)}
}