/**
 * Kazoku - Global Styles
 * Mobile-first responsive design with dark mode support
 */

/* ============================================
   CSS Variables
   ============================================ */
:root {
  /* Colors - WCAG AA compliant (4.5:1 contrast ratio) */
  --color-primary: #1565C0;         /* 5.2:1 contrast (was #2196F3 = 3.1:1) */
  --color-primary-dark: #0D47A1;
  --color-primary-light: #BBDEFB;
  --color-success: #2E7D32;         /* 4.5:1 contrast (was #4CAF50) */
  --color-warning: #E65100;         /* 4.5:1 contrast (was #FF9800) */
  --color-error: #C62828;           /* 5.9:1 contrast (was #F44336) */

  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-tertiary: #eeeeee;

  /* Text */
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-inverse: #ffffff;

  /* Borders */
  --border-color: #e0e0e0;
  --border-radius: 8px;
  --border-radius-sm: 4px;
  --border-radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;

  /* Layout */
  --header-height: 60px;
  --header-height-mobile: 56px;
  --sidebar-width: 280px;
  --sidebar-width-tablet: 220px;
  --touch-target-min: 44px;
}

/* Dark mode - System preference */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #404040;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
  }
}

/* Dark mode - Manual override */
[data-theme="dark"] {
  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --bg-tertiary: #2d2d2d;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --border-color: #404040;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);
}

/* Light mode - Manual override */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-tertiary: #eeeeee;
  --text-primary: #212121;
  --text-secondary: #757575;
  --border-color: #e0e0e0;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
}

img,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul,
ol {
  list-style: none;
}

/* ============================================
   Layout
   ============================================ */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
  z-index: 100;
}

.app-logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
}

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

.app-main {
  flex: 1;
  margin-top: var(--header-height);
  display: flex;
}

.app-sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: var(--spacing-md);
  display: none;
}

.app-content {
  flex: 1;
  padding: var(--spacing-md);
  overflow-y: auto;
}

/* Tablet and up */
@media (min-width: 768px) {
  .app-sidebar {
    display: block;
  }
}

/* ============================================
   Components - Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--border-radius);
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

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

.btn-danger {
  background-color: var(--color-error);
  color: var(--text-inverse);
}

.btn-block {
  display: flex;
  width: 100%;
}

.btn-link {
  background: none;
  border: none;
  color: var(--color-primary);
  cursor: pointer;
  font-weight: 500;
  padding: 0;
  text-decoration: none;
}

.btn-link:hover {
  text-decoration: underline;
}

/* ============================================
   Components - Forms
   ============================================ */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--text-primary);
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-input::placeholder {
  color: var(--text-secondary);
}

.form-error {
  display: none;
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

.form-error.visible {
  display: block;
}

.form-input.input-error {
  border-color: var(--color-error);
}

.form-input.input-error:focus {
  box-shadow: 0 0 0 3px rgba(244, 67, 54, 0.2);
}

/* ============================================
   Components - Cards
   ============================================ */
.card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-md);
}

/* ============================================
   Utilities
   ============================================ */
.hidden {
  display: none !important;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip link - visible on focus */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--spacing-md);
  background: var(--color-primary);
  color: var(--text-inverse);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  z-index: 9999;
  text-decoration: none;
  font-weight: 500;
  transition: top 0.2s;
}

.skip-link:focus {
  top: var(--spacing-md);
  outline: 2px solid var(--text-inverse);
  outline-offset: 2px;
}

.skip-link:hover {
  text-decoration: none;
}

.text-center {
  text-align: center;
}

.text-secondary {
  color: var(--text-secondary);
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

/* ============================================
   Views - Auth
   ============================================ */
.auth-view {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height));
  padding: var(--spacing-md);
}

.auth-container {
  width: 100%;
  max-width: 400px;
}

.auth-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-lg);
  text-align: center;
}

.auth-form {
  margin-top: var(--spacing-md);
}

.auth-message {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
  text-align: center;
}

.auth-message.error {
  background-color: #FFEBEE;
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

.auth-message.success {
  background-color: #E8F5E9;
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

@media (prefers-color-scheme: dark) {
  .auth-message.error {
    background-color: rgba(244, 67, 54, 0.15);
  }

  .auth-message.success {
    background-color: rgba(76, 175, 80, 0.15);
  }
}

[data-theme="dark"] .auth-message.error {
  background-color: rgba(244, 67, 54, 0.15);
}

[data-theme="dark"] .auth-message.success {
  background-color: rgba(76, 175, 80, 0.15);
}

.auth-switch {
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-md);
  margin-top: var(--spacing-md);
}

/* Auth Divider */
.auth-divider {
  display: flex;
  align-items: center;
  margin: var(--spacing-lg) 0;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--border-color);
}

.auth-divider span {
  padding: 0 var(--spacing-md);
}

/* Google Button */
.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  background-color: #ffffff;
  color: #3c4043;
  border: 1px solid #dadce0;
  font-weight: 500;
  transition: background-color 0.2s, box-shadow 0.2s;
}

.btn-google:hover {
  background-color: #f8f9fa;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.btn-google:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-google .google-icon {
  flex-shrink: 0;
}

@media (prefers-color-scheme: dark) {
  .btn-google {
    background-color: #4285f4;
    color: #ffffff;
    border-color: #4285f4;
  }

  .btn-google:hover {
    background-color: #3367d6;
    border-color: #3367d6;
  }

  .btn-google .google-icon path {
    fill: #ffffff;
  }
}

[data-theme="dark"] .btn-google {
  background-color: #4285f4;
  color: #ffffff;
  border-color: #4285f4;
}

[data-theme="dark"] .btn-google:hover {
  background-color: #3367d6;
  border-color: #3367d6;
}

[data-theme="dark"] .btn-google .google-icon path {
  fill: #ffffff;
}

/* ============================================
   Views - Calendar
   ============================================ */
.calendar-view {
  display: none;
}

.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.calendar-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.calendar-nav {
  display: flex;
  gap: var(--spacing-sm);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  background-color: var(--border-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.calendar-day-header {
  background-color: var(--bg-secondary);
  padding: var(--spacing-sm);
  text-align: center;
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.calendar-day {
  background-color: var(--bg-primary);
  min-height: 80px;
  padding: var(--spacing-xs);
  cursor: pointer;
  transition: background-color 0.15s;
}

.calendar-day:hover {
  background-color: var(--bg-secondary);
}

.calendar-day-number {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.calendar-day.today .calendar-day-number {
  background-color: var(--color-primary);
  color: var(--text-inverse);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.calendar-day.other-month {
  background-color: var(--bg-secondary);
}

.calendar-day.other-month .calendar-day-number {
  color: var(--text-secondary);
  opacity: 0.5;
}

/* Calendar Events */
.calendar-day-events {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: var(--spacing-xs);
}

.calendar-event {
  font-size: var(--font-size-xs);
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
  padding: 1px 4px;
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
}

.calendar-event:hover {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

@media (prefers-color-scheme: dark) {
  .calendar-event {
    background-color: rgba(33, 150, 243, 0.3);
    color: var(--color-primary);
  }

  .calendar-event:hover {
    background-color: var(--color-primary);
    color: var(--text-inverse);
  }
}

[data-theme="dark"] .calendar-event {
  background-color: rgba(33, 150, 243, 0.3);
  color: var(--color-primary);
}

[data-theme="dark"] .calendar-event:hover {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

/* Clickable calendar days */
.calendar-day {
  cursor: pointer;
  transition: background-color 0.15s;
}

.calendar-day:hover {
  background-color: var(--bg-tertiary);
}

.calendar-day.other-month:hover {
  background-color: var(--bg-tertiary);
}

/* Tablet and up - larger calendar cells */
@media (min-width: 768px) {
  .calendar-day {
    min-height: 100px;
    padding: var(--spacing-sm);
  }
}

/* Calendar Controls */
.calendar-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* View Selector */
.view-selector {
  display: flex;
  gap: var(--spacing-xs);
}

.view-selector .btn.active {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

/* ============================================
   Views - Calendar Week
   ============================================ */

.calendar-week-container {
  overflow-x: auto;
}

.calendar-week-grid {
  display: grid;
  grid-template-columns: 60px repeat(7, minmax(100px, 1fr));
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  min-width: 800px;
}

/* Week Header Row */
.calendar-week-header-cell {
  background-color: var(--bg-secondary);
  padding: var(--spacing-sm);
  text-align: center;
  font-weight: 500;
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
}

.calendar-week-header-cell:last-child {
  border-right: none;
}

.calendar-week-header-cell.corner {
  background-color: var(--bg-secondary);
}

.calendar-week-header-cell.today {
  background-color: var(--color-primary-light);
}

@media (prefers-color-scheme: dark) {
  .calendar-week-header-cell.today {
    background-color: rgba(33, 150, 243, 0.2);
  }
}

[data-theme="dark"] .calendar-week-header-cell.today {
  background-color: rgba(33, 150, 243, 0.2);
}

.calendar-week-day-name {
  display: block;
  font-weight: 600;
}

.calendar-week-day-date {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.calendar-week-header-cell.today .calendar-week-day-date {
  color: var(--color-primary-dark);
}

@media (prefers-color-scheme: dark) {
  .calendar-week-header-cell.today .calendar-week-day-date {
    color: var(--color-primary);
  }
}

[data-theme="dark"] .calendar-week-header-cell.today .calendar-week-day-date {
  color: var(--color-primary);
}

/* Week Body - Scrollable */
.calendar-week-body {
  display: contents;
}

/* Hour Cell (left column) */
.calendar-week-hour-cell {
  background-color: var(--bg-secondary);
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  text-align: right;
  padding: var(--spacing-xs);
  padding-right: var(--spacing-sm);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  height: 48px;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
}

/* Time Slot (day + hour intersection) */
.calendar-week-time-slot {
  position: relative;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  min-height: 48px;
}

.calendar-week-time-slot:last-child {
  border-right: none;
}

.calendar-week-time-slot.today {
  background-color: rgba(33, 150, 243, 0.05);
}

@media (prefers-color-scheme: dark) {
  .calendar-week-time-slot.today {
    background-color: rgba(33, 150, 243, 0.1);
  }
}

[data-theme="dark"] .calendar-week-time-slot.today {
  background-color: rgba(33, 150, 243, 0.1);
}

/* Week Event */
.calendar-week-event {
  position: absolute;
  left: 2px;
  right: 2px;
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: var(--border-radius-sm);
  padding: 2px 4px;
  font-size: var(--font-size-xs);
  overflow: hidden;
  cursor: pointer;
  z-index: 1;
  border-left: 3px solid var(--color-primary);
}

.calendar-week-event:hover {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

@media (prefers-color-scheme: dark) {
  .calendar-week-event {
    background-color: rgba(33, 150, 243, 0.3);
    color: var(--color-primary);
  }

  .calendar-week-event:hover {
    background-color: var(--color-primary);
    color: var(--text-inverse);
  }
}

[data-theme="dark"] .calendar-week-event {
  background-color: rgba(33, 150, 243, 0.3);
  color: var(--color-primary);
}

[data-theme="dark"] .calendar-week-event:hover {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

.calendar-week-event-title {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.calendar-week-event-time {
  font-size: 0.65rem;
  opacity: 0.8;
}

/* Responsive - Stack on mobile */
@media (max-width: 767px) {
  .calendar-controls {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }

  .view-selector {
    justify-content: center;
  }

  .calendar-nav {
    justify-content: center;
  }

  .calendar-week-container {
    margin: 0 calc(-1 * var(--spacing-md));
  }
}

/* ============================================
   Views - Calendar Day
   ============================================ */
.calendar-day-view {
  display: none;
}

.day-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.day-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.day-navigation {
  display: flex;
  gap: var(--spacing-sm);
}

.day-timeline {
  position: relative;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  background-color: var(--bg-primary);
}

.time-slot {
  display: flex;
  height: 60px;
  border-bottom: 1px solid var(--border-color);
}

.time-slot:last-of-type {
  border-bottom: none;
}

.time-label {
  width: 60px;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  flex-shrink: 0;
}

.time-events {
  flex: 1;
  position: relative;
}

.day-events-layer {
  position: absolute;
  top: 0;
  left: 60px;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.day-event {
  position: absolute;
  background-color: var(--color-primary);
  color: var(--text-inverse);
  border-radius: var(--border-radius-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  overflow: hidden;
  cursor: pointer;
  pointer-events: auto;
  transition: transform 0.15s, box-shadow 0.15s;
  display: flex;
  flex-direction: column;
  gap: 2px;
  box-shadow: var(--shadow-sm);
  margin: 0 var(--spacing-xs);
  box-sizing: border-box;
}

.day-event:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
  z-index: 10;
}

.day-event-time {
  font-size: var(--font-size-xs);
  opacity: 0.9;
}

.day-event-title {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Current time indicator */
.current-time-indicator {
  position: absolute;
  left: 60px;
  right: 0;
  height: 2px;
  background-color: var(--color-error);
  z-index: 5;
}

.current-time-indicator::before {
  content: '';
  position: absolute;
  left: -5px;
  top: -4px;
  width: 10px;
  height: 10px;
  background-color: var(--color-error);
  border-radius: 50%;
}

/* View tabs */
.calendar-view-tabs {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-sm);
}

.view-tab {
  padding: var(--spacing-xs) var(--spacing-md);
  background: none;
  border: none;
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}

.view-tab:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.view-tab.active {
  background-color: var(--color-primary);
  color: var(--text-inverse);
}

/* Responsive day view */
@media (max-width: 480px) {
  .day-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .day-navigation {
    width: 100%;
    justify-content: space-between;
  }

  .day-title {
    font-size: var(--font-size-lg);
  }

  .time-label {
    width: 50px;
    font-size: var(--font-size-xs);
  }

  .day-events-layer {
    left: 50px;
  }

  .current-time-indicator {
    left: 50px;
  }
}

/* ============================================
   Views - Settings
   ============================================ */
.settings-view {
  display: none;
}

.settings-container {
  max-width: 600px;
  margin: 0 auto;
}

.settings-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-lg);
}

.settings-section {
  margin-bottom: var(--spacing-lg);
}

.settings-section-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
}

.settings-form {
  display: flex;
  flex-direction: column;
}

.settings-message {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-sm);
}

.settings-message.success {
  background-color: #E8F5E9;
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.settings-message.error {
  background-color: #FFEBEE;
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

@media (prefers-color-scheme: dark) {
  .settings-message.success {
    background-color: rgba(76, 175, 80, 0.15);
  }

  .settings-message.error {
    background-color: rgba(244, 67, 54, 0.15);
  }
}

[data-theme="dark"] .settings-message.success {
  background-color: rgba(76, 175, 80, 0.15);
}

[data-theme="dark"] .settings-message.error {
  background-color: rgba(244, 67, 54, 0.15);
}

.settings-danger {
  border-color: var(--color-error);
}

.settings-danger .settings-section-title {
  color: var(--color-error);
}

/* Avatar styles */
.avatar-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.avatar-preview {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.avatar-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-image.hidden {
  display: none;
}

.avatar-placeholder {
  font-size: var(--font-size-2xl);
  color: var(--text-secondary);
  font-weight: 600;
}

.avatar-placeholder.hidden {
  display: none;
}

.avatar-upload {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.form-hint {
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

/* Select styling */
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23757575' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-md) center;
  padding-right: calc(var(--spacing-md) * 2 + 12px);
  cursor: pointer;
}

/* ============================================
   Components - Modal
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--spacing-md);
}

.modal.hidden {
  display: none !important;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
  position: relative;
  width: 100%;
  max-width: 400px;
  max-height: 90vh;
  overflow-y: auto;
  animation: modal-appear 0.2s ease-out;
}

@keyframes modal-appear {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
}

.modal-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: space-between;
  margin-top: var(--spacing-md);
}

.modal-actions-right {
  display: flex;
  gap: var(--spacing-sm);
}

/* ============================================
   Components - Sidebar Calendars
   ============================================ */
.calendars-section {
  display: flex;
  flex-direction: column;
}

.calendars-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
}

.calendars-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.calendars-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.calendar-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: background-color 0.15s;
}

.calendar-item:hover {
  background-color: var(--bg-tertiary);
}

.calendar-item.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

@media (prefers-color-scheme: dark) {
  .calendar-item.active {
    background-color: rgba(33, 150, 243, 0.2);
    color: var(--color-primary);
  }
}

[data-theme="dark"] .calendar-item.active {
  background-color: rgba(33, 150, 243, 0.2);
  color: var(--color-primary);
}

.calendar-item-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: var(--font-size-sm);
}

.calendar-item-actions {
  display: flex;
  gap: var(--spacing-xs);
  opacity: 0;
  transition: opacity 0.15s;
}

.calendar-item:hover .calendar-item-actions {
  opacity: 1;
}

.calendars-empty,
.calendars-error {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  padding: var(--spacing-sm);
  text-align: center;
}

.calendars-error {
  color: var(--color-error);
}

/* ============================================
   Components - Button Variants
   ============================================ */
.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.btn-icon {
  padding: var(--spacing-xs);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--border-radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s, color 0.15s;
}

.btn-icon:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-icon:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================
   Components - Sidebar Persons
   ============================================ */
.persons-section {
  display: flex;
  flex-direction: column;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.persons-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
}

.persons-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.persons-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.person-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  transition: background-color 0.15s;
}

.person-item:hover {
  background-color: var(--bg-tertiary);
}

.person-item-checkbox {
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.person-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: #fff;
  text-transform: uppercase;
}

.person-item-color {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.person-item-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: var(--font-size-sm);
}

.person-item-actions {
  display: flex;
  gap: var(--spacing-xs);
  opacity: 0;
  transition: opacity 0.15s;
}

.person-item:hover .person-item-actions {
  opacity: 1;
}

.persons-empty,
.persons-error {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  padding: var(--spacing-sm);
  text-align: center;
}

.persons-error {
  color: var(--color-error);
}

/* Person modal avatar preview */
.person-avatar-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.person-avatar-preview .person-avatar {
  width: 64px;
  height: 64px;
  font-size: var(--font-size-xl);
}

.person-avatar-preview-label {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

/* ============================================
   Components - Sidebar Events
   ============================================ */
.events-section {
  display: flex;
  flex-direction: column;
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}

.events-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
}

.events-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.events-filter {
  margin-bottom: var(--spacing-sm);
}

.events-filter .form-select {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.events-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  max-height: 300px;
  overflow-y: auto;
}

.event-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  border-left: 3px solid var(--color-primary);
  background-color: var(--bg-primary);
  cursor: pointer;
  transition: background-color 0.15s;
}

.event-item:hover {
  background-color: var(--bg-tertiary);
}

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

.event-item-date {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.event-item-persons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.event-person-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-xs);
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
  background-color: var(--bg-tertiary);
}

.event-person-badge-color {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.events-empty,
.events-loading,
.events-error {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  padding: var(--spacing-sm);
  text-align: center;
}

.events-error {
  color: var(--color-error);
}

/* Color input styling */
.color-input-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-color {
  width: 60px;
  height: 40px;
  padding: var(--spacing-xs);
  cursor: pointer;
}

.color-preview {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
}

/* ============================================
   Components - Share Modal
   ============================================ */
.share-modal-content {
  max-width: 500px;
}

.share-invite-form {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.share-invite-row {
  display: flex;
  gap: var(--spacing-sm);
  align-items: flex-end;
}

.share-email-group {
  flex: 1;
  margin-bottom: 0;
}

.share-role-group {
  width: 120px;
  margin-bottom: 0;
}

.share-invite-btn {
  margin-bottom: 0;
  height: 42px;
}

.share-section {
  margin-bottom: var(--spacing-md);
}

.share-section-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
}

.share-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.share-list-empty {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  padding: var(--spacing-sm);
  text-align: center;
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-sm);
}

.share-list-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius-sm);
}

.share-item-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  overflow: hidden;
}

.share-item-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.share-item-info {
  flex: 1;
  min-width: 0;
}

.share-item-name {
  font-size: var(--font-size-sm);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.share-item-email {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.share-item-expires {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.share-item-role {
  width: 100px;
}

.share-item-role select {
  width: 100%;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.share-item-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.share-owner-badge {
  font-size: var(--font-size-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
  border-radius: var(--border-radius-sm);
}

@media (prefers-color-scheme: dark) {
  .share-owner-badge {
    background-color: rgba(33, 150, 243, 0.2);
    color: var(--color-primary);
  }
}

[data-theme="dark"] .share-owner-badge {
  background-color: rgba(33, 150, 243, 0.2);
  color: var(--color-primary);
}

/* Responsive share modal */
@media (max-width: 500px) {
  .share-invite-row {
    flex-direction: column;
    align-items: stretch;
  }

  .share-email-group,
  .share-role-group {
    width: 100%;
    margin-bottom: var(--spacing-sm);
  }

  .share-invite-btn {
    width: 100%;
  }
}

/* ============================================
   Views - Invite
   ============================================ */
.invite-view {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height));
  padding: var(--spacing-md);
}

.invite-container {
  width: 100%;
  max-width: 450px;
  text-align: center;
}

.invite-state {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.invite-state.hidden {
  display: none;
}

.invite-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-md);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.invite-icon {
  margin-bottom: var(--spacing-md);
}

.invite-icon-success {
  color: var(--color-success);
}

.invite-icon-error {
  color: var(--color-error);
}

.invite-icon-expired {
  color: var(--color-warning);
}

.invite-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-md);
}

.invite-details {
  margin-bottom: var(--spacing-lg);
  text-align: left;
  width: 100%;
}

.invite-calendar-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  text-align: center;
  padding: var(--spacing-md);
  background-color: var(--bg-secondary);
  border-radius: var(--border-radius);
}

.invite-info {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border-color);
}

.invite-info:last-child {
  border-bottom: none;
}

.invite-role-badge {
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--bg-tertiary);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
}

.invite-role-badge.editor {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.invite-role-badge.reader {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
}

@media (prefers-color-scheme: dark) {
  .invite-role-badge.editor {
    background-color: rgba(33, 150, 243, 0.2);
    color: var(--color-primary);
  }
}

[data-theme="dark"] .invite-role-badge.editor {
  background-color: rgba(33, 150, 243, 0.2);
  color: var(--color-primary);
}

.invite-expires {
  font-size: var(--font-size-sm);
}

.invite-login-message {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.invite-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
}

.invite-actions .btn {
  min-width: 120px;
}

/* ============================================
   Components - Event Modal
   ============================================ */
.event-modal-content {
  max-width: 480px;
}

.event-datetime-row {
  display: flex;
  gap: var(--spacing-md);
}

.event-datetime-group {
  flex: 1;
}

/* Checkbox styling */
.form-checkbox-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  font-weight: normal;
}

.form-checkbox {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

/* Persons list for event form */
.event-persons-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  max-height: 150px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-sm);
}

.event-persons-list:empty::after {
  content: 'Aucune personne disponible';
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  text-align: center;
  padding: var(--spacing-sm);
}

.event-person-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: background-color 0.15s;
}

.event-person-item:hover {
  background-color: var(--bg-secondary);
}

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

.event-person-color {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.event-person-name {
  flex: 1;
  font-size: var(--font-size-sm);
}

/* Responsive event modal */
@media (max-width: 500px) {
  .event-datetime-row {
    flex-direction: column;
    gap: 0;
  }

  .event-modal-content {
    max-width: 100%;
  }
}

/* ============================================
   Responsive - Hamburger Button
   ============================================ */
.hamburger-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: var(--touch-target-min);
  height: var(--touch-target-min);
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--border-radius-sm);
  transition: background-color 0.15s;
  margin-right: var(--spacing-sm);
  flex-shrink: 0;
}

.hamburger-btn:hover {
  background-color: var(--bg-tertiary);
}

.hamburger-btn:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.hamburger-icon {
  display: block;
  position: relative;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: background-color 0.2s;
}

.hamburger-icon::before,
.hamburger-icon::after {
  content: '';
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: transform 0.2s, top 0.2s;
}

.hamburger-icon::before {
  top: -7px;
}

.hamburger-icon::after {
  top: 7px;
}

/* Hamburger X animation when sidebar open */
.hamburger-btn[aria-expanded="true"] .hamburger-icon {
  background-color: transparent;
}

.hamburger-btn[aria-expanded="true"] .hamburger-icon::before {
  top: 0;
  transform: rotate(45deg);
}

.hamburger-btn[aria-expanded="true"] .hamburger-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ============================================
   Responsive - Sidebar Backdrop
   ============================================ */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 149;
  opacity: 0;
  transition: opacity 0.3s;
}

.sidebar-backdrop.visible {
  display: block;
  opacity: 1;
}

/* ============================================
   Responsive - Mobile (<768px)
   ============================================ */
@media (max-width: 767px) {
  /* Header mobile */
  .app-header {
    height: var(--header-height-mobile);
    padding: 0 var(--spacing-sm);
  }

  .app-main {
    margin-top: var(--header-height-mobile);
  }

  /* Show hamburger button */
  .hamburger-btn {
    display: flex;
  }

  /* Sidebar as drawer */
  .app-sidebar {
    position: fixed;
    top: var(--header-height-mobile);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    max-width: 85vw;
    z-index: 150;
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
    display: block;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
  }

  .app-sidebar.open {
    transform: translateX(0);
  }

  /* Content full width */
  .app-content {
    padding: var(--spacing-sm);
  }

  /* Calendar header mobile */
  .calendar-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }

  .calendar-title {
    font-size: var(--font-size-lg);
  }

  /* Calendar controls stack */
  .calendar-controls {
    width: 100%;
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  /* View selector full width */
  .view-selector {
    width: 100%;
    display: flex;
  }

  .view-selector .btn {
    flex: 1;
    min-height: var(--touch-target-min);
    justify-content: center;
  }

  /* Calendar nav center */
  .calendar-nav {
    width: 100%;
    justify-content: space-between;
  }

  .calendar-nav .btn {
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
  }

  /* Calendar grid smaller cells */
  .calendar-day {
    min-height: 60px;
    padding: var(--spacing-xs);
  }

  .calendar-day-number {
    font-size: var(--font-size-xs);
  }

  /* Week grid mobile scroll */
  .calendar-week-grid {
    min-width: 650px;
  }

  /* Day view mobile */
  .day-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }

  .day-title {
    font-size: var(--font-size-lg);
    text-align: center;
  }

  .day-navigation {
    width: 100%;
    justify-content: space-between;
  }

  .day-navigation .btn {
    min-height: var(--touch-target-min);
    min-width: var(--touch-target-min);
  }

  /* Day timeline touch scroll */
  .day-timeline {
    touch-action: pan-y;
  }

  /* Modals full screen on mobile */
  .modal {
    padding: 0;
  }

  .modal-content {
    max-width: 100%;
    max-height: 100%;
    height: 100%;
    border-radius: 0;
    display: flex;
    flex-direction: column;
  }

  .modal-content form {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
  }

  .modal-actions {
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
  }

  /* Share modal responsive */
  .share-modal-content {
    max-width: 100%;
  }

  /* Event persons list scrollable */
  .event-persons-list {
    max-height: 120px;
  }

  /* Touch targets for buttons */
  .btn {
    min-height: var(--touch-target-min);
  }

  .btn-icon {
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
  }

  /* Settings container mobile padding */
  .settings-container {
    padding: 0;
  }

  .settings-section.card {
    border-radius: 0;
    margin-left: calc(-1 * var(--spacing-sm));
    margin-right: calc(-1 * var(--spacing-sm));
  }

  /* Auth view mobile */
  .auth-container {
    border-radius: 0;
    box-shadow: none;
    border: none;
    max-width: 100%;
  }

  /* Body scroll lock when sidebar open */
  body.sidebar-open {
    overflow: hidden;
  }
}

/* ============================================
   Responsive - Tablet (768px - 1024px)
   ============================================ */
@media (min-width: 768px) and (max-width: 1024px) {
  /* Narrower sidebar */
  .app-sidebar {
    width: var(--sidebar-width-tablet);
  }

  /* Content reduced padding */
  .app-content {
    padding: var(--spacing-sm);
  }

  /* Calendar cells smaller */
  .calendar-day {
    min-height: 80px;
  }

  /* Week grid reduced */
  .calendar-week-grid {
    min-width: 650px;
  }

  /* Calendar controls wrap */
  .calendar-controls {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
  }

  /* Settings container */
  .settings-container {
    max-width: 100%;
    padding: 0 var(--spacing-sm);
  }
}

/* ============================================
   Responsive - Desktop (>1024px)
   ============================================ */
@media (min-width: 1025px) {
  /* Hide hamburger on desktop */
  .hamburger-btn {
    display: none;
  }

  /* Sidebar always visible */
  .app-sidebar {
    display: block;
    transform: none;
  }

  /* Hide backdrop on desktop */
  .sidebar-backdrop {
    display: none !important;
  }
}

/* ============================================
   Accessibility - Focus Visible
   ============================================ */

/* Global focus-visible styles */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Remove default focus for mouse users */
:focus:not(:focus-visible) {
  outline: none;
}

/* Button focus styles */
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(21, 101, 192, 0.2);
}

.btn-primary:focus-visible {
  outline-color: var(--text-inverse);
  box-shadow: 0 0 0 4px rgba(21, 101, 192, 0.4);
}

.btn-danger:focus-visible {
  outline-color: var(--text-inverse);
  box-shadow: 0 0 0 4px rgba(198, 40, 40, 0.4);
}

/* Calendar day focus styles */
.calendar-day:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
  z-index: 1;
  position: relative;
}

/* Calendar event focus styles */
.calendar-event:focus-visible,
.calendar-week-event:focus-visible,
.day-event:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  z-index: 10;
}

/* Form input focus - already handled but ensure consistency */
.form-input:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* Link focus styles */
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--border-radius-sm);
}

/* Icon button focus */
.btn-icon:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Modal backdrop should not receive focus indicator */
.modal-backdrop:focus {
  outline: none;
}

/* Sidebar item focus */
.calendar-item:focus-visible,
.person-item:focus-visible,
.event-item:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: -2px;
}

/* ============================================
   Accessibility - Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  /* Keep skip link functional */
  .skip-link {
    transition: none;
  }

  /* Disable modal animation */
  .modal-content {
    animation: none;
  }

  /* Disable spinner animation */
  .invite-spinner {
    animation: none;
    border-top-color: var(--color-primary);
  }
}

/* ============================================
   Accessibility - High Contrast Mode
   ============================================ */
@media (prefers-contrast: more) {
  /* Increase border visibility */
  .btn {
    border: 2px solid currentColor;
  }

  .btn-primary {
    border-color: var(--color-primary-dark);
  }

  .btn-secondary {
    border-color: var(--text-primary);
  }

  .btn-danger {
    border-color: var(--color-error);
  }

  /* Form inputs with stronger borders */
  .form-input {
    border-width: 2px;
  }

  /* Cards with stronger borders */
  .card {
    border-width: 2px;
  }

  /* Calendar grid with stronger borders */
  .calendar-grid {
    border-width: 2px;
  }

  .calendar-day {
    border: 1px solid var(--border-color);
  }

  /* Calendar events more visible */
  .calendar-event,
  .calendar-week-event {
    border: 1px solid currentColor;
  }

  /* Focus indicators more prominent */
  :focus-visible {
    outline-width: 3px;
  }

  /* Links underlined */
  a {
    text-decoration: underline;
  }
}