/* =============================================
   CSS CUSTOM PROPERTIES
   ============================================= */

:root {
  /* Layout */
  --sidebar-width: 300px;

  /* Typography */
  --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-size-base: 14px;

  /* Calendar Geometry */
  --cell-border-radius: 4px;
  --grid-border-style: solid;
  --grid-border-width: 1px;

  /* Theme Colors (Light default) */
  --color-bg: #ffffff;
  --color-surface: #f7f7f8;
  --color-text: #1a1a2e;
  --color-text-muted: #6c757d;
  --color-primary: #2563eb;
  --color-primary-light: #eef4ff;
  --color-border: #e0e0e0;
  --color-weekend: #ffffff;
  --color-today: #ffffff;
  --color-today-border: #2563eb;
  --color-other-month: #f9f9f9;
  --color-other-month-text: #c8c8c8;
  --color-event-bg: #eef4ff;
  --color-event-text: #1e40af;
  --color-header-bg: #ffffff;
  --color-header-text: #333333;
  --color-sidebar-bg: #ffffff;
  --color-sidebar-border: #eeeeee;
  --color-input-bg: #fafafa;
  --color-input-border: #e0e0e0;
  --color-btn-primary: #2563eb;
  --color-btn-primary-text: #ffffff;
}

/* =============================================
   THEMES
   ============================================= */

body.theme-dark {
  --color-bg: #1a1a2e;
  --color-surface: #0f0f23;
  --color-text: #e0e0e0;
  --color-text-muted: #8892a0;
  --color-primary: #60a5fa;
  --color-primary-light: #1e3a5f;
  --color-border: #374151;
  --color-weekend: #1f1a2e;
  --color-today: #1e3a5f;
  --color-today-border: #60a5fa;
  --color-other-month: #111827;
  --color-other-month-text: #4b5563;
  --color-event-bg: #1e3a5f;
  --color-event-text: #93c5fd;
  --color-header-bg: #111827;
  --color-header-text: #e0e0e0;
  --color-sidebar-bg: #16213e;
  --color-sidebar-border: #374151;
  --color-input-bg: #1f2937;
  --color-input-border: #374151;
  --color-btn-primary: #3b82f6;
  --color-btn-primary-text: #ffffff;
}

body.theme-pastel {
  --color-bg: #fdf6f0;
  --color-surface: #f5ebe0;
  --color-text: #5c4033;
  --color-text-muted: #8b7355;
  --color-primary: #e8998d;
  --color-primary-light: #fce4e0;
  --color-border: #dbbba0;
  --color-weekend: #fce4e0;
  --color-today: #d5f0e0;
  --color-today-border: #7bc8a4;
  --color-other-month: #f0e6d8;
  --color-other-month-text: #bba58a;
  --color-event-bg: #e8d5c4;
  --color-event-text: #6b4226;
  --color-header-bg: #c9a99a;
  --color-header-text: #ffffff;
  --color-sidebar-bg: #fdf6f0;
  --color-sidebar-border: #dbbba0;
  --color-input-bg: #fef9f4;
  --color-input-border: #dbbba0;
  --color-btn-primary: #e8998d;
  --color-btn-primary-text: #ffffff;
}

body.theme-classic {
  --color-bg: #fffef5;
  --color-surface: #f5f0e0;
  --color-text: #3c3020;
  --color-text-muted: #8b7355;
  --color-primary: #8b5e3c;
  --color-primary-light: #f0e6d0;
  --color-border: #c4a87c;
  --color-weekend: #f8f0e0;
  --color-today: #e8dcc0;
  --color-today-border: #8b5e3c;
  --color-other-month: #f0ecd8;
  --color-other-month-text: #b8a080;
  --color-event-bg: #e8dcc0;
  --color-event-text: #5c3d1e;
  --color-header-bg: #6b4226;
  --color-header-text: #f5f0e0;
  --color-sidebar-bg: #fffef5;
  --color-sidebar-border: #c4a87c;
  --color-input-bg: #fdfbe8;
  --color-input-border: #c4a87c;
  --color-btn-primary: #8b5e3c;
  --color-btn-primary-text: #ffffff;
}

body.theme-mono {
  --color-bg: #ffffff;
  --color-surface: #f5f5f5;
  --color-text: #111111;
  --color-text-muted: #666666;
  --color-primary: #333333;
  --color-primary-light: #e8e8e8;
  --color-border: #cccccc;
  --color-weekend: #f5f5f5;
  --color-today: #e0e0e0;
  --color-today-border: #333333;
  --color-other-month: #f0f0f0;
  --color-other-month-text: #aaaaaa;
  --color-event-bg: #e8e8e8;
  --color-event-text: #222222;
  --color-header-bg: #222222;
  --color-header-text: #ffffff;
  --color-sidebar-bg: #ffffff;
  --color-sidebar-border: #cccccc;
  --color-input-bg: #fafafa;
  --color-input-border: #cccccc;
  --color-btn-primary: #333333;
  --color-btn-primary-text: #ffffff;
}

/* =============================================
   BASE STYLES
   ============================================= */

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

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  background: var(--color-surface);
  color: var(--color-text);
  line-height: 1.5;
}

/* =============================================
   NAVBAR
   ============================================= */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 52px;
  background: var(--color-sidebar-bg);
  border-bottom: 1px solid var(--color-sidebar-border);
  display: flex;
  align-items: center;
  padding: 0 1rem;
  z-index: 20;
  gap: 0.75rem;
}

.navbar-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-input-border);
  border-radius: 8px;
  background: var(--color-input-bg);
  color: var(--color-text);
  font-size: 1.3rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s;
}

.navbar-menu-btn:hover {
  background: var(--color-primary-light);
}

.navbar-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.navbar-actions {
  display: flex;
  gap: 0.5rem;
  margin-left: auto;
}

.navbar-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-input-border);
  border-radius: 8px;
  background: var(--color-input-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}

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

.navbar-btn svg {
  flex-shrink: 0;
}

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

.navbar-btn-primary:hover {
  background: var(--color-btn-primary);
  border-color: var(--color-btn-primary);
  opacity: 0.9;
}

/* Sidebar overlay for mobile */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: 52px;
  background: rgba(0, 0, 0, 0.4);
  z-index: 14;
}

body.sidebar-open .sidebar-overlay {
  display: block;
}

/* =============================================
   APP LAYOUT
   ============================================= */

.app-layout {
  display: flex;
  min-height: 100vh;
  padding-top: 52px;
}

/* =============================================
   SIDEBAR
   ============================================= */

.sidebar {
  width: var(--sidebar-width);
  background: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-sidebar-border);
  padding: 1.25rem;
  position: fixed;
  top: 52px;
  bottom: 0;
  left: 0;
  overflow-y: auto;
  z-index: 15;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: transform 0.25s ease;
}

.sidebar-header {
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-primary);
}

.app-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.sidebar-section {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-sidebar-border);
}

.sidebar-section:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.sidebar-footer {
  margin-top: auto;
  padding-top: 1rem;
  font-size: 0.72rem;
  color: var(--color-text-muted);
  text-align: center;
}

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

.sidebar-footer a:hover {
  text-decoration: underline;
}

.sidebar-section h2 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

/* =============================================
   FORM CONTROLS
   ============================================= */

.setting-row {
  margin-bottom: 0.75rem;
}

.setting-row:last-child {
  margin-bottom: 0;
}

.setting-row label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}

select, input[type="range"] {
  width: 100%;
}

select {
  padding: 0.4rem 0.5rem;
  border: 1px solid var(--color-input-border);
  border-radius: 6px;
  background: var(--color-input-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  appearance: auto;
}

select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: -1px;
}

input[type="range"] {
  height: 6px;
  cursor: pointer;
  accent-color: var(--color-primary);
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.slider-row input[type="range"] {
  flex: 1;
}

.slider-row span {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  min-width: 32px;
  text-align: right;
}

/* =============================================
   NAVIGATION CONTROLS
   ============================================= */

.nav-controls {
  display: flex;
  gap: 0.35rem;
  align-items: center;
  margin-bottom: 0.75rem;
}

.nav-controls select {
  flex: 1;
  min-width: 0;
}

.nav-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-input-border);
  border-radius: 6px;
  background: var(--color-input-bg);
  color: var(--color-text);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s, border-color 0.15s;
}

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

.view-toggle {
  display: flex;
  gap: 0;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--color-input-border);
}

.view-btn {
  flex: 1;
  padding: 0.4rem 0.75rem;
  border: none;
  background: var(--color-input-bg);
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

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

.view-btn:not(.active):hover {
  background: var(--color-primary-light);
  color: var(--color-text);
}

.week-selector {
  margin-top: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.week-selector label {
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
}

.week-selector select {
  flex: 1;
}

/* =============================================
   PRINT BUTTON
   ============================================= */

.print-button {
  width: 100%;
  padding: 0.75rem 1rem;
  border: none;
  border-radius: 8px;
  background: var(--color-btn-primary);
  color: var(--color-btn-primary-text);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
}

.print-button:hover {
  opacity: 0.9;
}

.print-button:active {
  transform: scale(0.98);
}

/* =============================================
   CALENDAR CONTENT
   ============================================= */

.calendar-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.calendar-header {
  margin-bottom: 1rem;
  text-align: center;
}

.calendar-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

/* =============================================
   MONTH VIEW
   ============================================= */

.month-view {
  width: 100%;
  max-width: 1000px;
}

.weekday-headers {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background: var(--color-header-bg);
  border-radius: var(--cell-border-radius) var(--cell-border-radius) 0 0;
}

.weekday-cell {
  padding: 0.6rem 0.5rem;
  text-align: center;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8em;
  letter-spacing: 0.06em;
  color: var(--color-header-text);
  border-bottom: 2px solid var(--color-border);
}

.month-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  grid-template-rows: repeat(6, minmax(90px, 1fr));
  border-left: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  border-bottom: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  border-radius: 0 0 var(--cell-border-radius) var(--cell-border-radius);
  background: var(--color-bg);
  overflow: hidden;
}

.day-cell {
  padding: 0.35rem 0.5rem;
  border-right: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  border-top: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  cursor: pointer;
  position: relative;
  transition: background-color 0.12s;
  overflow: hidden;
}

.day-cell:hover {
  background: var(--color-primary-light);
}

.day-cell.other-month {
  background: var(--color-other-month);
  color: var(--color-other-month-text);
}

.day-cell.other-month:hover {
  background: var(--color-primary-light);
}

.day-cell.weekend:not(.other-month) {
  background: var(--color-weekend);
}

.day-cell.today {
  background: var(--color-bg);
}

.day-number {
  font-weight: 600;
  font-size: 0.9em;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.7em;
  height: 1.7em;
  border-radius: 50%;
}

.day-cell.today .day-number {
  background: var(--color-today-border);
  color: #ffffff;
}

.day-events {
  margin-top: 0.25rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.event-item {
  background: var(--color-event-bg);
  color: var(--color-event-text);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.78em;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
  transition: opacity 0.12s;
}

.event-item:hover {
  opacity: 0.8;
}

/* =============================================
   WEEK VIEW
   ============================================= */

.week-view {
  width: 100%;
  max-width: 1100px;
}

.week-grid {
  display: grid;
  grid-template-columns: 60px repeat(7, 1fr);
  border: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  border-radius: var(--cell-border-radius);
  background: var(--color-bg);
  overflow: hidden;
}

.week-corner-cell {
  background: var(--color-header-bg);
  border-bottom: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  border-right: var(--grid-border-width) var(--grid-border-style) var(--color-border);
}

.week-day-header {
  padding: 0.5rem 0.25rem;
  text-align: center;
  font-weight: 600;
  font-size: 0.8em;
  background: var(--color-header-bg);
  color: var(--color-header-text);
  border-bottom: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  border-right: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  line-height: 1.3;
}

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

.time-label {
  padding: 0.2rem 0.4rem;
  font-size: 0.72em;
  color: var(--color-text-muted);
  text-align: right;
  border-bottom: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  border-right: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
}

.time-slot {
  padding: 0.15rem 0.25rem;
  border-bottom: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  border-right: var(--grid-border-width) var(--grid-border-style) var(--color-border);
  cursor: pointer;
  font-size: 0.78em;
  min-height: 36px;
  transition: background-color 0.12s;
}

.time-slot:hover {
  background: var(--color-primary-light);
}

.time-slot .event-item {
  white-space: normal;
}

/* =============================================
   EVENT MODAL
   ============================================= */

.event-modal {
  border: none;
  border-radius: 12px;
  padding: 1.5rem;
  max-width: 420px;
  width: 90%;
  background: var(--color-bg);
  color: var(--color-text);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
}

.event-modal::backdrop {
  background: rgba(0, 0, 0, 0.4);
}

.event-modal h3 {
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

#modal-date-display {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

#event-text {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-input-border);
  border-radius: 8px;
  background: var(--color-input-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.9rem;
  resize: vertical;
  min-height: 80px;
}

#event-text:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: -1px;
}

.modal-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  gap: 0.5rem;
}

.modal-actions-right {
  display: flex;
  gap: 0.5rem;
  margin-left: auto;
}

.btn-primary, .btn-secondary, .btn-danger {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.12s;
}

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

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-input-border);
}

.btn-danger {
  background: #dc2626;
  color: #ffffff;
}

.btn-primary:hover, .btn-secondary:hover, .btn-danger:hover {
  opacity: 0.85;
}

/* =============================================
   INTRO / WELCOME MODAL
   ============================================= */

.intro-modal {
  border: none;
  border-radius: 20px;
  padding: 0;
  max-width: 480px;
  width: 92%;
  background: #fff;
  color: #1a1a2e;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.35);
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  overflow: hidden;
  animation: intro-fade-in 0.4s ease-out;
}

@keyframes intro-fade-in {
  from {
    opacity: 0;
    transform: translate(-50%, -48%) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

.intro-modal::backdrop {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: intro-backdrop-in 0.3s ease-out;
}

@keyframes intro-backdrop-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.intro-modal-content {
  display: flex;
  flex-direction: column;
}

.intro-modal-image {
  width: 100%;
}

.intro-modal-image img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0;
}

.intro-modal-body {
  padding: 1.75rem 2rem 2rem;
  text-align: center;
}

.intro-modal-title {
  font-size: 1.4rem;
  font-weight: 400;
  margin: 0 0 0.75rem;
  color: #1a1a2e;
  letter-spacing: -0.01em;
}

.intro-modal-title strong {
  font-weight: 700;
}

.intro-modal-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #555;
  margin: 0 0 1.5rem;
}

.intro-modal-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: #2563eb;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.intro-modal-btn:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

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

/* =============================================
   UTILITY CLASSES
   ============================================= */

.hidden {
  display: none !important;
}

/* =============================================
   PAPER SIZE CLASSES
   ============================================= */

body.paper-a4.orientation-portrait .month-view,
body.paper-a4.orientation-portrait .week-view {
  max-width: 800px;
}

body.paper-a4.orientation-landscape .month-view,
body.paper-a4.orientation-landscape .week-view {
  max-width: 1100px;
}

body.paper-letter.orientation-portrait .month-view,
body.paper-letter.orientation-portrait .week-view {
  max-width: 780px;
}

body.paper-letter.orientation-landscape .month-view,
body.paper-letter.orientation-landscape .week-view {
  max-width: 1050px;
}

/* =============================================
   PRINT PREVIEW OVERLAY
   ============================================= */

.print-preview-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.print-preview-container {
  background: var(--color-sidebar-bg);
  border-radius: 12px;
  max-width: 900px;
  width: 100%;
  max-height: 95vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.3);
}

.print-preview-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-sidebar-border);
  flex-shrink: 0;
}

.print-preview-toolbar h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.print-preview-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.preview-orientation-btn {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--color-input-border);
  border-radius: 6px;
  background: var(--color-input-bg);
  color: var(--color-text);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

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

.preview-orientation-btn.active {
  background: var(--color-primary);
  color: var(--color-btn-primary-text);
  border-color: var(--color-primary);
}

.preview-print-btn {
  padding: 0.45rem 1.2rem;
  border: none;
  border-radius: 6px;
  background: var(--color-btn-primary);
  color: var(--color-btn-primary-text);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.12s;
}

.preview-print-btn:hover {
  opacity: 0.9;
}

.preview-close-btn {
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-input-border);
  border-radius: 6px;
  background: var(--color-input-bg);
  color: var(--color-text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s;
}

.preview-close-btn:hover {
  background: #fee2e2;
  color: #dc2626;
}

.print-preview-body {
  flex: 1;
  overflow: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: #e8e8e8;
}

.print-preview-page {
  background: white;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.15);
  padding: 10mm;
  overflow: hidden;
  transform-origin: center center;
  transition: width 0.3s, height 0.3s;
  display: flex;
  flex-direction: column;
}

.print-preview-page.a4-portrait {
  width: 210mm;
  height: 297mm;
}

.print-preview-page.a4-landscape {
  width: 297mm;
  height: 210mm;
}

.print-preview-page.letter-portrait {
  width: 8.5in;
  height: 11in;
}

.print-preview-page.letter-landscape {
  width: 11in;
  height: 8.5in;
}

/* Scale down the page to fit the preview area */
.print-preview-page {
  transform: scale(var(--preview-scale, 0.5));
  flex-shrink: 0;
}

.print-preview-page .calendar-header {
  margin-bottom: 2mm;
}

.print-preview-page .calendar-content {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.print-preview-page .month-view,
.print-preview-page .week-view {
  max-width: none !important;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.print-preview-page .weekday-headers {
  flex-shrink: 0;
}

.print-preview-page .month-grid {
  flex: 1;
  grid-template-rows: repeat(6, 1fr);
}

.print-preview-page .week-grid {
  flex: 1;
}

.print-preview-page .day-cell {
  min-height: 0;
}

.print-preview-page .day-cell.today {
  background: var(--color-bg) !important;
}

.print-preview-page .day-cell.today .day-number {
  background: none !important;
  color: inherit !important;
}

/* =============================================
   MOBILE RESPONSIVE
   ============================================= */

@media (max-width: 768px) {
  /* Show hamburger menu */
  .navbar-menu-btn {
    display: flex;
  }

  /* Hide navbar button labels on small screens */
  .navbar-btn-label {
    display: none;
  }

  .navbar-btn {
    padding: 0.5rem;
  }

  /* Sidebar slides in from left */
  .sidebar {
    transform: translateX(-100%);
    width: 85vw;
    max-width: 320px;
    box-shadow: none;
  }

  body.sidebar-open .sidebar {
    transform: translateX(0);
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15);
  }

  /* Calendar content takes full width */
  .calendar-content {
    margin-left: 0;
    padding: 1rem 0.5rem;
  }

  /* Calendar header smaller */
  .calendar-header h1 {
    font-size: 1.3rem;
  }

  /* Month grid: smaller cells */
  .month-grid {
    grid-template-rows: repeat(6, minmax(60px, 1fr));
  }

  .day-cell {
    padding: 0.2rem 0.3rem;
  }

  .day-number {
    font-size: 0.8em;
  }

  .event-item {
    font-size: 0.7em;
    padding: 0.05rem 0.25rem;
  }

  /* Weekday headers smaller */
  .weekday-cell {
    padding: 0.4rem 0.2rem;
    font-size: 0.7em;
  }

  /* Week view: time-label smalare */
  .week-grid {
    grid-template-columns: 45px repeat(7, 1fr);
  }

  .time-label {
    font-size: 0.65em;
    padding: 0.2rem 0.2rem;
  }

  .time-slot {
    padding: 0.1rem 0.15rem;
    min-height: 30px;
  }

  .week-day-header {
    font-size: 0.65em;
    padding: 0.3rem 0.15rem;
  }

  /* Event modal */
  .event-modal {
    width: 95%;
    max-width: 360px;
  }

  /* Intro modal */
  .intro-modal {
    width: 95%;
    border-radius: 16px;
  }

  .intro-modal-image img {
    border-radius: 0;
  }

  .intro-modal-body {
    padding: 1.25rem 1.5rem 1.5rem;
  }

  .intro-modal-title {
    font-size: 1.2rem;
  }

  .intro-modal-text {
    font-size: 0.88rem;
  }

  /* Print preview */
  .print-preview-container {
    max-width: 100%;
    border-radius: 0;
    max-height: 100vh;
  }

  .print-preview-overlay {
    padding: 0;
  }

  .print-preview-toolbar {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .print-preview-actions {
    flex-wrap: wrap;
  }
}

/* Small phones */
@media (max-width: 480px) {
  .navbar {
    padding: 0 0.5rem;
    gap: 0.5rem;
  }

  .navbar-title {
    font-size: 1rem;
  }

  .month-grid {
    grid-template-rows: repeat(6, minmax(50px, 1fr));
  }

  .day-cell {
    padding: 0.15rem 0.2rem;
  }

  .day-number {
    font-size: 0.75em;
    min-width: 1.5em;
    height: 1.5em;
  }

  .event-item {
    font-size: 0.65em;
  }

  .week-grid {
    grid-template-columns: 38px repeat(7, 1fr);
  }

  .time-label {
    font-size: 0.6em;
  }

  .week-day-header {
    font-size: 0.6em;
  }
}

/* =============================================
   PRINT STYLES
   ============================================= */

@media print {
  .no-print,
  .navbar,
  .sidebar,
  .sidebar-overlay,
  .print-preview-overlay {
    display: none !important;
  }

  html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    background: white;
    font-size: var(--font-size-base);
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
    color-adjust: exact;
  }

  .app-layout {
    display: flex;
    flex-direction: column;
    height: 100vh;
    min-height: 100vh;
    padding-top: 0;
  }

  .calendar-content {
    margin-left: 0;
    padding: 0;
    width: 100%;
    max-width: none;
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .calendar-header {
    margin-bottom: 2mm;
    padding-top: 1mm;
    flex-shrink: 0;
  }

  .calendar-header h1 {
    font-size: 1.5em;
  }

  /* Month view fills remaining space */
  .month-view {
    max-width: none !important;
    flex: 1;
    display: flex;
    flex-direction: column;
    page-break-inside: avoid;
    break-inside: avoid;
  }

  .weekday-headers {
    flex-shrink: 0;
  }

  .month-grid {
    flex: 1;
    grid-template-rows: repeat(6, 1fr);
  }

  .day-cell {
    min-height: 0;
    padding: 2px 4px;
  }

  /* Week view fills remaining space */
  .week-view {
    max-width: none !important;
    flex: 1;
    display: flex;
    flex-direction: column;
    page-break-inside: avoid;
    break-inside: avoid;
  }

  .week-grid {
    flex: 1;
    grid-template-columns: 50px repeat(7, 1fr);
  }

  .time-slot {
    min-height: 0;
    padding: 1px 2px;
  }

  /* Remove today marking in print */
  .day-cell.today {
    background: var(--color-bg) !important;
  }

  .day-cell.today .day-number {
    background: none !important;
    color: inherit !important;
  }

  /* Remove hover effects */
  .day-cell:hover,
  .time-slot:hover {
    background: inherit;
  }

  .event-item:hover {
    opacity: 1;
  }

  .weekday-headers,
  .weekday-cell,
  .month-grid,
  .day-cell,
  .day-cell.weekend,
  .day-cell.other-month,
  .event-item,
  .week-grid,
  .week-day-header,
  .week-corner-cell,
  .time-label,
  .time-slot {
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
    color-adjust: exact;
  }
}