/* Tutor Dashboard Styles */
:root {
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --accent-color: #667eea;
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --text-muted: #718096;
  --bg-dark: #0f0f23;
  --bg-darker: #0a0a1a;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-input: rgba(255, 255, 255, 0.08);
  --border-color: rgba(255, 255, 255, 0.1);
  --success-color: #48bb78;
  --error-color: #f56565;
  --warning-color: #ed8936;
  --sidebar-width: 280px;
}

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

body {
  font-family: 'Poppins', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  overflow-x: hidden;
}

.tutor-dashboard {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-darker);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  z-index: 1000;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-gradient);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon i {
  font-size: 20px;
  color: white;
}

.logo-text h1 {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-text span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.sidebar-nav {
  flex: 1;
  padding: 20px 0;
}

.sidebar-nav ul {
  list-style: none;
}

.nav-item {
  margin: 4px 12px;
}

.nav-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 10px;
  transition: all 0.3s ease;
  position: relative;
}

.nav-item a:hover {
  background: rgba(102, 126, 234, 0.1);
  color: var(--text-primary);
}

.nav-item.active a {
  background: var(--primary-gradient);
  color: white;
}

.nav-item i {
  font-size: 18px;
}

.nav-item span {
  font-size: 0.9rem;
  font-weight: 500;
}

.nav-badge {
  margin-left: auto;
  background: var(--error-color);
  color: white;
  font-size: 0.75rem;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid var(--border-color);
}

.user-card {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.user-card img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.user-info h3 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.user-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.sign-out-btn {
  width: 100%;
  padding: 10px;
  background: rgba(245, 101, 101, 0.1);
  border: 1px solid rgba(245, 101, 101, 0.3);
  color: var(--error-color);
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.sign-out-btn:hover {
  background: rgba(245, 101, 101, 0.2);
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  display: flex;
  flex-direction: column;
}

.content-header {
  background: var(--bg-darker);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 20px;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
}

.menu-toggle:hover {
  background: var(--bg-card);
}

.page-title h1 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.page-title p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.notification-btn {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.notification-btn:hover {
  background: rgba(102, 126, 234, 0.1);
  border-color: var(--accent-color);
}

.notification-dot {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  background: var(--error-color);
  border-radius: 50%;
}

.btn-primary {
  background: var(--primary-gradient);
  border: none;
  color: white;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--accent-color);
}

/* Content Area */
.content-area {
  flex: 1;
  padding: 32px;
}

.dashboard-section {
  display: none;
}

.dashboard-section.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 24px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-color);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.2);
}

.stat-icon {
  width: 56px;
  height: 56px;
  background: var(--primary-gradient);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon i {
  font-size: 24px;
  color: white;
}

.stat-content h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.stat-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.stat-change {
  font-size: 0.8rem;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 6px;
}

.stat-change.positive {
  background: rgba(72, 187, 120, 0.2);
  color: var(--success-color);
}

.stat-change.negative {
  background: rgba(245, 101, 101, 0.2);
  color: var(--error-color);
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.view-all {
  color: var(--accent-color);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.3s ease;
}

.view-all:hover {
  color: var(--text-primary);
}

.card-content {
  padding: 24px;
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.empty-state i {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 0.9rem;
}

/* Section Headers */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

.section-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

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

.search-bar i {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
  font-size: 16px;
}

.search-bar input {
  padding: 10px 12px 10px 36px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.9rem;
  width: 250px;
  transition: all 0.3s ease;
}

.search-bar input:focus {
  outline: none;
  border-color: var(--accent-color);
  background: rgba(102, 126, 234, 0.05);
}

/* Filter Tabs */
.filter-tabs {
  display: flex;
  gap: 8px;
}

.tab-btn {
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

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

.tab-btn:hover:not(.active) {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

/* Loading States */
.loading-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.loading-state i {
  font-size: 32px;
  margin-bottom: 16px;
}

.loading-state p {
  font-size: 0.9rem;
}

/* Profile Styles */
.profile-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.profile-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.profile-avatar {
  position: relative;
  flex-shrink: 0;
}

.profile-avatar img {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent-color);
}

.avatar-change-btn {
  position: absolute;
  bottom: 0;
  right: 0;
  background: var(--primary-gradient);
  border: 2px solid var(--bg-darker);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.avatar-change-btn:hover {
  transform: scale(1.1);
}

.avatar-change-btn i {
  font-size: 14px;
  color: white;
}

.profile-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.profile-info p {
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.profile-stats {
  display: flex;
  gap: 24px;
}

.profile-stats .stat {
  text-align: center;
}

.profile-stats .value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.profile-stats .label {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.profile-sections {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.profile-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
}

.profile-section h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

/* Mobile Responsive */
@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
  }
  
  .mobile-overlay.active {
    display: block;
  }
  
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
  }
  
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  
  .search-bar input {
    width: 200px;
  }
}

@media (max-width: 640px) {
  .content-header {
    padding: 16px 20px;
  }
  
  .content-area {
    padding: 20px;
  }
  
  .page-title h1 {
    font-size: 1.4rem;
  }
  
  .header-right {
    gap: 12px;
  }
  
  .btn-primary {
    padding: 10px 16px;
    font-size: 0.85rem;
  }
  
  .profile-card {
    flex-direction: column;
    text-align: center;
  }
  
  .profile-stats {
    justify-content: center;
  }
}