/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #4a90e2;
  --primary-dark: #357abd;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --background: #f5f7fa;
  --card-background: #ffffff;
  --text-primary: #2c3e50;
  --text-secondary: #6c757d;
  --border-color: #dee2e6;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--background);
  color: var(--text-primary);
  line-height: 1.6;
}

.hidden {
  display: none !important;
}

/* Login Page */
#login-page {
  display: none;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

#login-page.active {
  display: flex;
}

.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  padding: 20px;
}

.login-card {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  width: 100%;
  max-width: 400px;
}

.login-card h1 {
  text-align: center;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.login-card .subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 16px;
  transition: border-color 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-group-checkbox {
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-group-checkbox input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.form-group-checkbox label {
  margin: 0;
  cursor: pointer;
  font-size: 14px;
  color: var(--text-secondary);
  user-select: none;
}

.error-message {
  color: var(--danger-color);
  font-size: 14px;
  margin: 10px 0;
  min-height: 20px;
}

/* Buttons */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  width: 100%;
}

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

.btn-primary:disabled {
  background-color: var(--secondary-color);
  cursor: not-allowed;
}

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

.btn-secondary:hover {
  background-color: #5a6268;
}

.btn-icon {
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 8px 16px;
  font-size: 18px;
  cursor: pointer;
}

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

/* Navigation */
.navbar {
  background-color: white;
  box-shadow: var(--shadow);
  padding: 15px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.nav-brand h2 {
  color: var(--primary-color);
  font-size: 24px;
  margin: 0;
}

.brand-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.brand-link:hover h2 {
  opacity: 0.8;
}

.nav-menu {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-link {
  padding: 10px 16px;
  text-decoration: none;
  color: var(--text-primary);
  border-radius: 6px;
  transition: all 0.3s;
  font-weight: 500;
}

.nav-link:hover {
  background-color: var(--background);
}

.nav-link.active {
  background-color: var(--primary-color);
  color: white;
}

/* Hamburger menu toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--text-primary);
  transition: all 0.3s;
  border-radius: 3px;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(7px, 7px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* Content Area */
.content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 30px 20px;
}

.content-page {
  display: none;
}

.content-page.active {
  display: block;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.page-header h1 {
  font-size: 32px;
  color: var(--text-primary);
}

/* Loading */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
  font-size: 18px;
}

/* Dashboard Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.card {
  background: var(--card-background);
  padding: 30px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.card.clickable {
  cursor: pointer;
}

.card.clickable:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.card-icon {
  font-size: 48px;
  margin-bottom: 15px;
}

.card h3 {
  margin-bottom: 15px;
  color: var(--text-primary);
}

.card-stats {
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 18px;
  font-weight: 600;
  background-color: var(--secondary-color);
  color: white;
}

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

.badge-success {
  background-color: var(--success-color);
}

.label {
  color: var(--text-secondary);
  font-size: 14px;
}

/* Messages */
.messages-tabs {
  display: flex;
  gap: 10px;
}

.btn-tab {
  padding: 8px 20px;
  border: 2px solid var(--border-color);
  background: white;
  color: var(--text-primary);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

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

.btn-tab.active {
  border-color: var(--primary-color);
  background-color: var(--primary-color);
  color: white;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.messages-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 15px;
}

.message-card {
  background: var(--card-background);
  padding: 20px;
  border-radius: 8px;
  border-left: 4px solid var(--border-color);
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

.message-card.unread {
  border-left-color: var(--primary-color);
  background-color: #f0f7ff;
}

.message-card:hover {
  box-shadow: var(--shadow-hover);
}

.message-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
  flex-wrap: wrap;
  gap: 10px;
}

.message-from {
  font-weight: 600;
  color: var(--text-primary);
}

.message-date {
  color: var(--text-secondary);
  font-size: 14px;
}

.message-title {
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.message-content {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: 8px;
}

/* Announcements */
.announcement-card {
  background: var(--card-background);
  padding: 25px;
  border-radius: 8px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.announcement-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 15px;
  flex-wrap: wrap;
  gap: 10px;
}

.announcement-header h3 {
  color: var(--primary-color);
  margin: 0;
}

.announcement-date {
  color: var(--text-secondary);
  font-size: 14px;
}

.announcement-content {
  color: var(--text-primary);
  line-height: 1.6;
  margin-bottom: 10px;
}

.announcement-author {
  color: var(--text-secondary);
  font-style: italic;
  text-align: right;
  margin-top: 15px;
}

/* Grades - New Design */
.subject-section-new {
  margin-bottom: 15px;
  background: var(--card-background);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.subject-header-new {
  display: flex;
  align-items: center;
  padding: 15px 20px;
  background-color: var(--background);
  cursor: pointer;
  transition: all 0.3s;
  gap: 15px;
}

.subject-header-new:hover {
  background-color: #e8ecf0;
}

.subject-header-new.expanded {
  background-color: var(--primary-color);
  color: white;
}

.subject-header-new.expanded .subject-expand-hint {
  color: rgba(255, 255, 255, 0.8);
}

.subject-toggle-icon {
  font-size: 24px;
  font-weight: bold;
  transition: transform 0.3s;
  min-width: 24px;
}

.subject-name-new {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.subject-header-new.expanded .subject-name-new {
  color: white;
}

.grade-summary-badge {
  margin-left: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  opacity: 0.9;
}

.subject-header-new.expanded .grade-summary-badge {
  color: rgba(255, 255, 255, 0.9);
}

.subject-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.subject-expand-hint {
  font-size: 12px;
  color: var(--text-secondary);
  font-style: italic;
}

.subject-content {
  padding: 20px;
}

.period-section {
  margin-bottom: 30px;
}

.period-section:last-child {
  margin-bottom: 0;
}

.period-header {
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-color);
}

.period-header h4 {
  color: var(--text-primary);
  font-size: 16px;
  margin: 0;
}

.grades-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  padding: 15px;
  background-color: #fffef0;
  border-radius: 6px;
}

.grade-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.grade-badge:hover {
  transform: scale(1.15);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.grades-table-detailed {
  width: 100%;
  overflow-x: auto;
}

.grades-table-header-detailed {
  display: grid;
  grid-template-columns: 80px 150px 250px 120px 150px 200px 150px;
  gap: 10px;
  padding: 12px;
  background-color: var(--background);
  border-radius: 6px;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 13px;
  margin-bottom: 8px;
}

.grade-row-detailed {
  display: grid;
  grid-template-columns: 80px 150px 250px 120px 150px 200px 150px;
  gap: 10px;
  padding: 12px;
  border-bottom: 1px solid var(--border-color);
  align-items: center;
  transition: all 0.2s;
  background-color: white;
}

.grade-row-detailed:hover {
  background-color: var(--background);
}

.grade-row-detailed.new {
  background-color: #fffef0;
}

.grade-row-detailed:last-child {
  border-bottom: none;
}

.grade-cell {
  font-size: 13px;
  color: var(--text-primary);
  word-wrap: break-word;
}

.grade-value-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 16px;
  font-weight: 700;
}

.grade-descriptive {
  background-color: #F0E68C !important;
}

.grade-image {
  width: 20px;
  height: 20px;
  display: inline-block;
}

/* Grades - Old Design (keep for backwards compatibility) */
.subject-section {
  margin-bottom: 40px;
  background: var(--card-background);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.subject-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 2px solid var(--border-color);
}

.subject-header h3 {
  color: var(--text-primary);
  margin: 0;
  font-size: 22px;
}

.subject-stats {
  color: var(--text-secondary);
  font-size: 14px;
}

.grades-table {
  width: 100%;
  margin-bottom: 15px;
}

.grades-table-header {
  display: grid;
  grid-template-columns: 120px 1fr 150px 120px 200px;
  gap: 15px;
  padding: 12px 15px;
  background-color: var(--background);
  border-radius: 6px;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 10px;
}

.grade-row {
  display: grid;
  grid-template-columns: 120px 1fr 150px 120px 200px;
  gap: 15px;
  padding: 15px;
  border-bottom: 1px solid var(--border-color);
  align-items: center;
  transition: all 0.3s;
}

.grade-row:hover {
  background-color: var(--background);
}

.grade-row.new {
  background-color: #f0fff4;
  border-left: 4px solid var(--success-color);
}

.grade-row:last-child {
  border-bottom: none;
}

.grade-col-grade {
  display: flex;
  align-items: center;
  gap: 10px;
}

.grade-value-display {
  font-size: 24px;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 6px;
  display: inline-block;
  min-width: 50px;
  text-align: center;
}

.grade-excellent {
  background-color: #d4edda;
  color: #155724;
}

.grade-good {
  background-color: #cce5ff;
  color: #004085;
}

.grade-average {
  background-color: #fff3cd;
  color: #856404;
}

.grade-poor {
  background-color: #f8d7da;
  color: #721c24;
}

.grade-fail {
  background-color: #f5c6cb;
  color: #721c24;
}

.badge-small {
  padding: 4px 8px;
  font-size: 11px;
  border-radius: 12px;
  font-weight: 600;
  text-transform: uppercase;
}

.grade-col-category {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.grade-category-name {
  font-weight: 500;
  color: var(--text-primary);
}

.grade-weight {
  font-size: 12px;
  color: var(--text-secondary);
}

.grade-col-teacher {
  color: var(--text-primary);
}

.grade-col-date {
  color: var(--text-secondary);
  font-size: 14px;
}

.grade-col-comment {
  color: var(--text-secondary);
  font-size: 14px;
  font-style: italic;
}

.subject-average {
  margin-top: 15px;
  padding: 15px;
  background-color: var(--background);
  border-radius: 6px;
  font-size: 16px;
  color: var(--text-primary);
  text-align: right;
}

.subject-average strong {
  font-size: 20px;
  color: var(--primary-color);
}

/* Calendar View Toggle */
.calendar-view-toggle {
  display: flex;
  gap: 10px;
}

.btn-view-toggle {
  padding: 8px 16px;
  border: 2px solid var(--border-color);
  background: white;
  color: var(--text-primary);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-view-toggle:hover {
  border-color: var(--primary-color);
  background-color: var(--background);
}

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

/* Calendar Grid View */
.calendar-view-container {
  margin-top: 20px;
}

/* Hide month display on desktop, show dropdowns */
.calendar-month-display {
  display: none;
}

.calendar-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding: 15px;
  background-color: white;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.calendar-nav-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 24px;
  cursor: pointer;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.calendar-nav-btn:hover {
  background-color: var(--primary-dark);
  transform: scale(1.1);
}

.calendar-title {
  display: flex;
  gap: 10px;
}

.calendar-select {
  padding: 8px 12px;
  border: 2px solid var(--border-color);
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  background-color: white;
  cursor: pointer;
  transition: border-color 0.3s;
}

.calendar-select:hover {
  border-color: var(--primary-color);
}

.calendar-select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.calendar-grid-wrapper {
  background-color: white;
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background-color: var(--background);
  border-bottom: 2px solid var(--border-color);
}

.calendar-weekday {
  padding: 12px;
  text-align: center;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
}

.calendar-weekday.weekend {
  background-color: #e8f5e9;
  color: var(--success-color);
}

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

.calendar-day {
  background-color: white;
  min-height: 120px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all 0.2s;
}

.calendar-day:hover:not(.empty):not(.past) {
  background-color: var(--background);
  cursor: pointer;
}

.calendar-day.empty {
  background-color: #fafafa;
}

.calendar-day.past {
  background-color: #f5f5f5;
  opacity: 0.6;
}

.calendar-day.past .day-number {
  color: var(--text-secondary);
}

.calendar-day.past .day-event {
  opacity: 0.7;
}

.calendar-day.today {
  background-color: #fff3e0;
  border: 2px solid var(--warning-color);
}

.calendar-day.today .day-number {
  background-color: var(--warning-color);
  color: white;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.calendar-day.weekend:not(.past) {
  background-color: #f9fff9;
}

.day-number {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.day-events {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.day-event {
  padding: 6px 8px;
  border-radius: 4px;
  font-size: 11px;
  line-height: 1.3;
  cursor: pointer;
  transition: all 0.2s;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  border-left: 3px solid;
}

.day-event:hover {
  transform: translateX(2px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.event-type-default .day-event,
.day-event.event-type-default {
  background-color: #e3f2fd;
  border-left-color: var(--primary-color);
  color: #1565c0;
}

.event-type-test .day-event,
.day-event.event-type-test {
  background-color: #ffebee;
  border-left-color: #dc3545;
  color: #c62828;
}

.event-type-quiz .day-event,
.day-event.event-type-quiz {
  background-color: #fff8e1;
  border-left-color: #ffc107;
  color: #f57f17;
}

.event-type-homework .day-event,
.day-event.event-type-homework {
  background-color: #e0f7fa;
  border-left-color: #17a2b8;
  color: #00838f;
}

.event-type-trip .day-event,
.day-event.event-type-trip {
  background-color: #e8f5e9;
  border-left-color: #28a745;
  color: #2e7d32;
}

.event-type-holiday .day-event,
.day-event.event-type-holiday {
  background-color: #f3e5f5;
  border-left-color: #6f42c1;
  color: #6a1b9a;
}

/* Calendar List View (existing styles) */
.calendar-date-section {
  margin-bottom: 30px;
}

.calendar-date-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding: 10px 15px;
  background-color: var(--background);
  border-radius: 8px;
}

.calendar-date-header h3 {
  color: var(--text-primary);
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.event-count {
  color: white;
  background-color: var(--primary-color);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  min-width: 24px;
  text-align: center;
}

.calendar-events-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.calendar-event-card {
  background: var(--card-background);
  border-radius: 8px;
  box-shadow: var(--shadow);
  display: flex;
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
  cursor: pointer;
}

.calendar-event-card:hover {
  box-shadow: var(--shadow-hover);
}

.calendar-event-card.expanded {
  box-shadow: var(--shadow-hover);
}

.event-type-indicator {
  width: 4px;
  min-height: 100%;
  background-color: var(--primary-color);
}

.event-type-test .event-type-indicator {
  background-color: #dc3545;
}

.event-type-quiz .event-type-indicator {
  background-color: #ffc107;
}

.event-type-homework .event-type-indicator {
  background-color: #17a2b8;
}

.event-type-trip .event-type-indicator {
  background-color: #28a745;
}

.event-type-holiday .event-type-indicator {
  background-color: #6f42c1;
}

/* Event Summary (collapsed state) */
.event-summary {
  flex: 1;
  padding: 12px 15px;
}

.event-summary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.event-summary-title {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 14px;
  flex: 1;
}

.event-time-compact {
  color: var(--text-secondary);
  font-size: 12px;
  white-space: nowrap;
}

.event-summary-subject {
  color: var(--text-secondary);
  font-size: 12px;
  margin-top: 4px;
}

/* Event Details (expanded state) */
.event-details-full {
  padding: 0 15px 15px 15px;
  border-top: 1px solid var(--border-color);
  margin-top: 8px;
}

.event-loading {
  text-align: center;
  padding: 15px;
  color: var(--text-secondary);
  font-style: italic;
}

.event-details-content {
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.event-details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.event-api-details {
  margin-bottom: 12px;
}

.event-description-box {
  background-color: #f0f7ff;
  border-left: 4px solid var(--primary-color);
  padding: 15px;
  border-radius: 6px;
  margin-bottom: 12px;
}

.event-description-box strong {
  display: block;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 14px;
}

.event-description-text {
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 14px;
  white-space: pre-wrap;
}

.event-detail-item {
  font-size: 14px;
  color: var(--text-primary);
  padding: 8px;
  background-color: var(--background);
  border-radius: 4px;
}

.event-detail-item strong {
  color: var(--text-secondary);
  font-weight: 600;
  margin-right: 6px;
}

.event-original-title {
  font-size: 12px;
  color: var(--text-secondary);
  font-style: italic;
  padding: 8px;
  background-color: var(--background);
  border-radius: 4px;
  margin-top: 8px;
  word-break: break-word;
}

/* Expand icon */
.event-expand-icon {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  color: var(--text-secondary);
  transition: transform 0.3s;
  pointer-events: none;
}

.calendar-event-card.expanded .event-expand-icon {
  transform: translateY(-50%) rotate(90deg);
}

/* No Data */
.no-data {
  text-align: center;
  padding: 40px;
  color: var(--text-secondary);
  font-style: italic;
}

/* Event Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  animation: fadeIn 0.3s;
  padding: 20px;
  overflow-y: auto;
}

.modal-container {
  background: white;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  max-width: 600px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.3s;
}

@keyframes slideUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.modal-header {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.modal-header h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  flex: 1;
}

.modal-close {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: white;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 28px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  line-height: 1;
  padding: 0;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: scale(1.1);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-loading {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
  font-style: italic;
}

.modal-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.modal-info-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.modal-info-item strong {
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.modal-info-item span {
  color: var(--text-primary);
  font-size: 15px;
}

.event-type-badge {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
}

.event-type-badge.event-type-default {
  background-color: #e3f2fd;
  color: #1565c0;
}

.event-type-badge.event-type-test {
  background-color: #ffebee;
  color: #c62828;
}

.event-type-badge.event-type-quiz {
  background-color: #fff8e1;
  color: #f57f17;
}

.event-type-badge.event-type-homework {
  background-color: #e0f7fa;
  color: #00838f;
}

.event-type-badge.event-type-trip {
  background-color: #e8f5e9;
  color: #2e7d32;
}

.event-type-badge.event-type-holiday {
  background-color: #f3e5f5;
  color: #6a1b9a;
}

.modal-description {
  background-color: #f0f7ff;
  border-left: 4px solid var(--primary-color);
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.modal-description strong {
  display: block;
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 12px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.modal-description-text {
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 15px;
}

.modal-description-text a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--primary-color);
  transition: all 0.3s;
}

.modal-description-text a:hover {
  color: var(--primary-dark);
  border-bottom-color: var(--primary-dark);
  background-color: rgba(74, 144, 226, 0.1);
}

.modal-meta {
  color: var(--text-secondary);
  font-size: 13px;
  padding-top: 12px;
  border-top: 1px solid var(--border-color);
}

.modal-original {
  margin-top: 20px;
  padding: 16px;
  background-color: var(--background);
  border-radius: 8px;
  font-size: 13px;
}

.modal-original strong {
  display: block;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.modal-original div {
  color: var(--text-secondary);
  font-style: italic;
  word-break: break-word;
}

.modal-error {
  color: var(--danger-color);
  text-align: center;
  padding: 20px;
}

/* Message Attachments */
.message-attachments {
  margin-top: 20px;
  padding: 20px;
  background-color: var(--background);
  border-radius: 8px;
}

.message-attachments strong {
  display: block;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 12px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.attachments-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.attachment-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  background-color: white;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  transition: all 0.3s;
}

.attachment-item:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow);
}

.attachment-item a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: all 0.3s;
  padding: 6px 12px;
  border-radius: 4px;
}

.attachment-item a:hover {
  background-color: var(--primary-color);
  color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
  /* Navigation */
  .navbar {
    padding: 12px 20px;
    flex-wrap: nowrap;
  }

  .nav-brand h2 {
    font-size: 18px;
  }

  /* Show hamburger menu on mobile */
  .nav-toggle {
    display: flex;
  }

  /* Hide menu by default on mobile */
  .nav-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    z-index: 1000;
    gap: 5px;
  }

  /* Show menu when active */
  .nav-menu.active {
    display: flex;
  }

  .nav-link {
    width: 100%;
    text-align: left;
    padding: 12px 16px;
    border-radius: 6px;
  }

  .nav-menu #logout-btn {
    width: 100%;
    margin-top: 10px;
  }

  /* Content */
  .content {
    padding: 20px 15px;
  }

  .page-header h1 {
    font-size: 24px;
  }

  /* Cards */
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 15px;
  }

  .card {
    padding: 16px;
    text-align: center;
  }

  .card-icon {
    font-size: 32px;
    margin-bottom: 8px;
  }

  .card h3 {
    font-size: 14px;
    margin-bottom: 10px;
  }

  .card-stats {
    flex-direction: column;
    gap: 4px;
  }

  .card-stats .badge {
    font-size: 16px;
    padding: 4px 10px;
  }

  .card-stats .label {
    font-size: 11px;
  }

  .card-title {
    font-size: 16px;
  }

  .card-value {
    font-size: 28px;
  }

  .page-header {
    flex-direction: row;
    align-items: center;
    gap: 15px;
  }

  #dashboard-page .page-header {
    flex-direction: row;
    justify-content: space-between;
  }

  /* Buttons */
  .btn {
    padding: 12px 20px;
    font-size: 14px;
  }

  /* Message cards */
  .message-card {
    padding: 15px;
  }

  .message-title {
    font-size: 15px;
  }

  /* Subject sections */
  .subject-header-new {
    padding: 14px;
  }

  .subject-name-new {
    font-size: 14px;
  }

  .grade-summary-badge {
    font-size: 12px;
    margin-left: 6px;
  }

  .subject-expand-hint {
    font-size: 11px;
  }

  /* Messages tabs responsive */
  .messages-tabs {
    width: 100%;
  }

  .btn-tab {
    flex: 1;
  }

  /* Grades responsive - New design */
  .grades-table-header-detailed {
    display: none;
  }

  .grades-table-detailed {
    gap: 10px;
  }

  .grade-row-detailed {
    display: block;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: white;
    margin-bottom: 10px;
  }

  .grade-row-detailed.new {
    border-left: 4px solid var(--success-color);
  }

  .grade-cell {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
  }

  .grade-cell:last-child {
    border-bottom: none;
  }

  .grade-cell:first-child {
    padding-top: 0;
  }

  .grade-cell::before {
    content: attr(data-label) ":";
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
    flex-shrink: 0;
  }

  .grade-cell:first-child {
    justify-content: flex-start;
  }

  .grade-cell:first-child::before {
    margin-right: 10px;
  }

  .grades-summary {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .grade-badge {
    font-size: 16px;
    padding: 6px 10px;
  }

  .period-header h4 {
    font-size: 16px;
  }

  /* Grades responsive - Old design */
  .grades-table-header {
    display: none;
  }

  .grade-row {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 10px;
  }

  .grade-row.new {
    border-left: 4px solid var(--success-color);
  }

  .grade-col-grade,
  .grade-col-category,
  .grade-col-teacher,
  .grade-col-date,
  .grade-col-comment {
    display: flex;
    flex-direction: column;
  }

  .grade-col-grade::before {
    content: "Ocena:";
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 5px;
  }

  .grade-col-category::before {
    content: "Kategoria:";
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 5px;
  }

  .grade-col-teacher::before {
    content: "Nauczyciel:";
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 5px;
  }

  .grade-col-date::before {
    content: "Data:";
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 5px;
  }

  .grade-col-comment::before {
    content: "Komentarz:";
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 5px;
  }

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

  /* Calendar responsive */
  .calendar-date-header {
    flex-direction: row;
  }

  .event-details-grid {
    grid-template-columns: 1fr;
  }

  .event-expand-icon {
    top: 12px;
    transform: translateY(0);
  }

  .calendar-event-card.expanded .event-expand-icon {
    transform: translateY(0) rotate(90deg);
  }

  /* Calendar grid responsive */
  .calendar-view-toggle {
    flex-direction: row;
    gap: 8px;
  }

  .btn-view-toggle {
    padding: 10px;
    font-size: 20px;
    min-width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Hide button text on mobile, show only icons */
  .btn-view-toggle[data-view="grid"]::before {
    content: "📅";
  }

  .btn-view-toggle[data-view="list"]::before {
    content: "📋";
  }

  .btn-view-toggle {
    font-size: 0;
  }

  .btn-view-toggle::before {
    font-size: 20px;
  }

  /* Calendar improvements for mobile */
  .calendar-controls {
    padding: 10px;
    display: flex;
    flex-direction: row !important;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
  }

  .calendar-title {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 15px;
  }

  .calendar-nav-btn {
    padding: 10px;
    font-size: 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    flex-shrink: 0;
  }

  .calendar-nav-btn:active {
    transform: scale(0.95);
  }

  /* Hide dropdowns on mobile, show text display */
  .calendar-month-display {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    white-space: nowrap;
  }

  .calendar-select {
    display: none;
  }

  .calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
  }

  .calendar-weekday {
    font-size: 10px;
    padding: 6px 2px;
    font-weight: 600;
  }

  .calendar-days-grid {
    gap: 2px;
  }

  .calendar-day {
    min-height: 60px;
    font-size: 10px;
    padding: 4px 2px;
  }

  .day-number {
    font-size: 12px;
    margin-bottom: 2px;
  }

  .day-events {
    gap: 1px;
  }

  .day-event {
    font-size: 8px;
    padding: 2px 4px;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* Hide event text on very small screens, just show dots */
  .calendar-day.has-events .day-number::after {
    content: "";
    display: block;
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
    margin: 2px auto 0;
  }

  /* Add visual feedback for clickable days */
  .calendar-day.has-events {
    background-color: var(--background);
  }

  .calendar-day.has-events:active {
    background-color: #e0e7f0;
  }

  /* Modal responsive */
  .modal-container {
    max-height: 95vh;
    margin: 10px;
  }

  .modal-header {
    padding: 16px;
  }

  .modal-header h2 {
    font-size: 18px;
  }

  .modal-body {
    padding: 16px;
  }

  .modal-info-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* Calendar day events */
  .day-events {
    gap: 2px;
  }

  .calendar-weekday {
    font-size: 12px;
    padding: 8px 4px;
  }

  .day-number {
    font-size: 13px;
  }

  /* Announcements */
  .announcement-card {
    padding: 15px;
  }

  .announcement-header h3 {
    font-size: 16px;
  }

  .announcement-content {
    font-size: 14px;
  }
}

/* Extra small devices (phones in portrait, less than 576px) */
@media (max-width: 576px) {
  .nav-brand h2 {
    font-size: 16px;
  }

  .page-header h1 {
    font-size: 18px;
  }

  /* More compact dashboard cards */
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .card {
    padding: 12px;
  }

  .card-icon {
    font-size: 28px;
    margin-bottom: 6px;
  }

  .card h3 {
    font-size: 13px;
    margin-bottom: 8px;
  }

  .card-stats .badge {
    font-size: 14px;
    padding: 3px 8px;
  }

  .card-stats .label {
    font-size: 10px;
  }

  .card-title {
    font-size: 14px;
  }

  .card-value {
    font-size: 24px;
  }

  .subject-name-new {
    font-size: 13px;
  }

  .grade-summary-badge {
    font-size: 10px;
  }

  /* Calendar extra compact */
  .calendar-day {
    min-height: 50px;
    font-size: 9px;
    padding: 3px 1px;
  }

  .day-number {
    font-size: 11px;
  }

  .day-event {
    display: none; /* Hide event labels on very small screens */
  }

  /* Show only event dots on tiny screens */
  .calendar-day.has-events .day-number {
    font-weight: 600;
    color: var(--primary-color);
  }

  /* Add visual feedback for clickable days */
  .calendar-day.has-events {
    background-color: var(--background);
  }

  .calendar-day.has-events:active {
    background-color: #e0e7f0;
  }

  .calendar-weekday {
    font-size: 9px;
    padding: 4px 1px;
  }

  /* Buttons */
  .btn-icon {
    padding: 8px;
    font-size: 18px;
  }
}

/* Day events modal (all screen sizes) */
.day-events-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.day-event-card {
  background: white;
  padding: 14px;
  border-radius: 8px;
  border-left: 4px solid var(--primary-color);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.day-event-card:active {
  transform: scale(0.98);
  background-color: var(--background);
}

.event-card-type {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.event-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.event-card-time {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.event-card-subject {
  font-size: 13px;
  color: var(--text-primary);
  font-style: italic;
}

/* Event type colors for day event cards */
.day-event-card.event-type-holiday {
  border-left-color: #e74c3c;
}

.day-event-card.event-type-test {
  border-left-color: #e67e22;
}

.day-event-card.event-type-quiz {
  border-left-color: #f39c12;
}

.day-event-card.event-type-homework {
  border-left-color: #3498db;
}

.day-event-card.event-type-trip {
  border-left-color: #9b59b6;
}