/* Dashboard Styles for PrepSharp - Enhanced Version */

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

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-5px); }
  100% { transform: translateY(0px); }
}

@keyframes glow {
  0% { box-shadow: 0 0 5px rgba(79, 70, 229, 0.2); }
  50% { box-shadow: 0 0 20px rgba(79, 70, 229, 0.4); }
  100% { box-shadow: 0 0 5px rgba(79, 70, 229, 0.2); }
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Ripple effect */
.ripple {
  position: absolute;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.7);
  transform: scale(0);
  animation: ripple 0.6s linear;
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background-color: rgba(15, 23, 42, 0.9);
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  z-index: 1000;
}

:root {
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary-color: #3b82f6;
  --accent-color: #f59e0b;
  --accent-dark: #d97706;
  --premium-color: #8b5cf6;
  --premium-dark: #7c3aed;
  --background-color: #f0f4f8;
  --card-bg: #ffffff;
  --text-color: #1e293b;
  --text-light: #64748b;
  --success: #10b981;
  --danger: #ef4444;
  --border-radius: 16px;
  --shadow-sm: 0 2px 5px rgba(0,0,0,0.08);
  --shadow-md: 0 8px 15px rgba(0,0,0,0.1);
  --shadow-lg: 0 15px 30px rgba(0,0,0,0.12);
  --gradient-primary: linear-gradient(135deg, #2563eb, #3b82f6);
  --gradient-accent: linear-gradient(135deg, #f59e0b, #d97706);
  --gradient-premium: linear-gradient(135deg, #8b5cf6, #7c3aed);
  --gradient-new: linear-gradient(135deg, #06b6d4, #0ea5e9);
  --gradient-popular: linear-gradient(135deg, #f43f5e, #e11d48);
  --transition-default: all 0.3s ease;
}

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

body {
  font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Dashboard Layout */
.dashboard-container {
  display: flex;
  min-height: 100vh;
}

/* Animation classes for elements */
.welcome-section {
  animation: fadeIn 0.8s ease-out;
}

.stats-cards .stat-card:nth-child(1) {
  animation: fadeIn 0.6s ease-out 0.1s both;
}

.stats-cards .stat-card:nth-child(2) {
  animation: fadeIn 0.6s ease-out 0.2s both;
}

.stats-cards .stat-card:nth-child(3) {
  animation: fadeIn 0.6s ease-out 0.3s both;
}

.dashboard-grid .dashboard-card:nth-child(1) {
  animation: fadeIn 0.6s ease-out 0.4s both;
}

.dashboard-grid .dashboard-card:nth-child(2) {
  animation: fadeIn 0.6s ease-out 0.5s both;
}

.subscription-card {
  animation: fadeIn 0.6s ease-out 0.6s both;
}

.notification-bell {
  animation: pulse 2s infinite;
}

.plan-badge {
  animation: float 3s ease-in-out infinite;
}

/* Sidebar Styles */
.sidebar {
  width: 280px;
  background-color: var(--card-bg);
  background-image: linear-gradient(to bottom, var(--card-bg), rgba(99, 102, 241, 0.08));
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
  border-right: 1px solid rgba(0,0,0,0.05);
  transition: var(--transition-default);
}

.sidebar-header {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.sidebar-header .logo {
  height: 70px;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.3));
  vertical-align: middle;
}

.sidebar-header h2 {
  font-weight: 600;
  font-size: 20px;
  color: var(--primary-color);
}

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

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

.sidebar-nav li {
  margin-bottom: 5px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  padding: 14px 24px;
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-default);
  border-radius: 0 50px 50px 0;
  margin-right: 16px;
  position: relative;
  overflow: hidden;
}

.sidebar-nav a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 0;
  background: var(--gradient-primary);
  opacity: 0.1;
  transition: var(--transition-default);
  z-index: -1;
}

.sidebar-nav a i {
  margin-right: 14px;
  font-size: 18px;
  width: 24px;
  text-align: center;
  color: var(--text-light);
  transition: var(--transition-default);
}

.sidebar-nav li.active a {
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--primary-color);
  font-weight: 600;
}

.sidebar-nav li.active a::before {
  width: 100%;
}

.sidebar-nav li.active a i {
  color: var(--primary-color);
  transform: scale(1.1);
}

.sidebar-nav a:hover {
  background-color: rgba(0,0,0,0.03);
  transform: translateX(5px);
}

.sidebar-nav a:hover::before {
  width: 10px;
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid rgba(0,0,0,0.05);
}

.plan-info {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.plan-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  color: white;
}

.plan-badge.basic {
  background-color: var(--secondary-color);
  background-image: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

.plan-badge.standard {
  background-color: var(--accent-color);
  background-image: linear-gradient(135deg, var(--accent-color), var(--accent-dark));
}

.plan-badge.premium {
  background-color: var(--premium-color);
  background-image: linear-gradient(135deg, var(--premium-color), var(--premium-dark));
}

.plan-badge.free {
  background-color: var(--primary-color);
  background-image: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.upgrade-link {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}

/* Main Content Styles */
.main-content {
  flex: 1;
  margin-left: 280px;
  padding: 30px;
  position: relative;
}

/* Top Navigation */
.top-nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 10px 0;
  margin-bottom: 30px;
}

.search-container {
  position: relative;
  width: 300px;
}

.search-container i {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-light);
}

.search-container input {
  width: 100%;
  padding: 12px 12px 12px 42px;
  border: 1px solid rgba(0,0,0,0.08);
  border-radius: 12px;
  font-size: 15px;
  background-color: rgba(255,255,255,0.8);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 6px rgba(0,0,0,0.03);
  transition: var(--transition-default);
}

.search-container input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.user-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.notification-bell {
  position: relative;
  cursor: pointer;
}

.notification-bell i {
  font-size: 20px;
  color: var(--text-light);
  transition: color 0.3s ease;
}

.notification-bell:hover i {
  color: var(--primary-color);
}

.notification-count {
  position: absolute;
  top: -8px;
  right: -8px;
  background-color: var(--danger);
  color: white;
  font-size: 12px;
  font-weight: 600;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
}

.notification-bell:hover .notification-count {
  transform: scale(1.1);
}

.notification-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: -10px;
  background-color: white;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  width: 320px;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  overflow: hidden;
}

.notification-bell:hover .notification-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.notification-header {
  padding: 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.notification-header h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 0;
}

.mark-all-read {
  font-size: 12px;
  color: var(--primary-color);
  text-decoration: none;
}

.notification-list {
  max-height: 320px;
  overflow-y: auto;
}

.notification-item {
  display: flex;
  padding: 15px;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: background-color 0.2s ease;
}

.notification-item:hover {
  background-color: rgba(79, 70, 229, 0.05);
}

.notification-item.unread {
  background-color: rgba(79, 70, 229, 0.03);
}

.notification-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 15px;
}

.notification-icon.new-test {
  background-color: rgba(79, 70, 229, 0.1);
}

.notification-icon.reminder {
  background-color: rgba(249, 115, 22, 0.1);
}

.notification-icon.achievement {
  background-color: rgba(16, 185, 129, 0.1);
}

.notification-icon i {
  font-size: 16px;
}

.notification-icon.new-test i {
  color: var(--primary-color);
}

.notification-icon.reminder i {
  color: var(--accent-color);
}

.notification-icon.achievement i {
  color: var(--success);
}

.notification-content {
  flex: 1;
}

.notification-title {
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 3px;
}

.notification-text {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 5px;
}

.notification-time {
  font-size: 12px;
  color: var(--text-light);
  opacity: 0.8;
}

.notification-footer {
  padding: 12px;
  text-align: center;
  border-top: 1px solid rgba(0,0,0,0.05);
}

.view-all-notifications {
  font-size: 14px;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  position: relative;
}

.user-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background-color: white;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  width: 200px;
  padding: 10px 0;
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

.user-profile:hover .user-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 15px;
  color: var(--text-color);
  text-decoration: none;
  transition: all 0.2s ease;
}

.dropdown-item:hover {
  background-color: rgba(79, 70, 229, 0.05);
  color: var(--primary-color);
}

.dropdown-item i {
  width: 20px;
  text-align: center;
  font-size: 14px;
  color: var(--text-light);
}

.dropdown-item:hover i {
  color: var(--primary-color);
}

.dropdown-divider {
  height: 1px;
  background-color: rgba(0,0,0,0.05);
  margin: 8px 0;
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
}

.avatar-initials {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4f46e5, #6366f1);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 14px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.user-name {
  font-weight: 500;
}

/* Dashboard Content */
.welcome-section {
  margin-bottom: 30px;
}

.welcome-section h1 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 10px;
  background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-fill-color: transparent;
  letter-spacing: -0.5px;
  position: relative;
  display: inline-block;
}

.welcome-section h1::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.welcome-section p {
  color: var(--text-light);
  font-size: 16px;
  margin-bottom: 20px;
}

.quick-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.action-btn {
  background-color: white;
  border: 1px solid rgba(79, 70, 229, 0.2);
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.action-btn i {
  font-size: 14px;
}

.action-btn:hover {
  background-color: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(79, 70, 229, 0.2);
}

/* Stats Cards */
.stats-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 20px;
  transition: var(--transition-default);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.03);
  cursor: pointer;
  transform: translateZ(0);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background: var(--gradient-primary);
  opacity: 0.05;
  border-radius: 50%;
  transform: translate(50%, -50%);
  transition: var(--transition-default);
}

.stat-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.stat-card:hover::after {
  transform: translate(30%, -30%) scale(1.5);
  opacity: 0.08;
}

.stat-icon {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(99, 102, 241, 0.2));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 16px rgba(79, 70, 229, 0.15);
  position: relative;
  overflow: hidden;
  transition: var(--transition-default);
}

.stat-card:hover .stat-icon {
  transform: scale(1.1) rotate(5deg);
}

.stat-icon i {
  font-size: 24px;
  color: var(--primary-color);
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-info h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.stat-info p {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-color);
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.dashboard-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  position: relative;
  transition: var(--transition-default);
  border: 1px solid rgba(0,0,0,0.03);
}

.dashboard-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transition: var(--transition-default);
}

.dashboard-card::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 10%;
  right: 10%;
  height: 10px;
  background: rgba(0,0,0,0.08);
  filter: blur(10px);
  border-radius: 50%;
  z-index: -1;
  transition: var(--transition-default);
  opacity: 0;
}

.dashboard-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
}

.dashboard-card:hover::before {
  height: 6px;
}

.dashboard-card:hover::after {
  opacity: 1;
  bottom: -15px;
}

.card-header {
  padding: 20px;
  border-bottom: 1px solid rgba(0,0,0,0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h2 {
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-icon {
  color: var(--primary-color);
  font-size: 16px;
}

.view-all {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all 0.3s ease;
}

.view-all:hover {
  transform: translateX(3px);
}

.card-content {
  padding: 20px;
}

/* Paper List */
.paper-list {
  list-style: none;
}

.paper-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px;
  border-radius: 16px;
  margin-bottom: 15px;
  border: 1px solid rgba(0,0,0,0.05);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  background: linear-gradient(to right, rgba(255,255,255,0.9), rgba(255,255,255,1));
}

.paper-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 4px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: all 0.3s ease;
}

.paper-item:hover {
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.15);
  border-color: rgba(37, 99, 235, 0.2);
  transform: translateY(-3px);
  background: linear-gradient(to right, rgba(240, 249, 255, 0.9), rgba(255, 255, 255, 1));
}

.paper-item:hover::before {
  opacity: 1;
}

.paper-item:last-child {
  margin-bottom: 0;
}

.paper-info {
  position: relative;
  padding-right: 10px;
}

.paper-info h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-color);
  transition: var(--transition-default);
}

.paper-item:hover .paper-info h3 {
  color: var(--primary-color);
}

.paper-info p {
  font-size: 14px;
  color: var(--text-light);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.subject-icon {
  color: var(--primary-color);
  font-size: 12px;
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(37, 99, 235, 0.1);
  border-radius: 50%;
  padding: 10px;
}

.paper-meta {
  display: flex;
  gap: 15px;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-light);
}

.paper-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.paper-meta i {
  color: var(--accent-color);
}

.paper-badge {
  position: absolute;
  top: -10px;
  left: -10px;
  padding: 5px 10px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  color: white;
  border-radius: 0 8px 8px 0;
  box-shadow: 0 3px 8px rgba(0,0,0,0.15);
  transform: rotate(-45deg);
  transform-origin: top left;
  letter-spacing: 1px;
}

.paper-badge.new {
  background: var(--gradient-new);
}

.paper-badge.popular {
  background: var(--gradient-popular);
}

.start-btn {
  background-image: var(--gradient-primary);
  color: white;
  border: none;
  border-radius: 30px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition-default);
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
  position: relative;
  overflow: hidden;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

.start-btn i {
  transition: transform 0.3s ease;
  font-size: 12px;
}

.start-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background-image: linear-gradient(to right, var(--secondary-color), var(--primary-dark));
  transition: var(--transition-default);
  z-index: -1;
}

.start-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 15px rgba(79, 70, 229, 0.5);
}

.start-btn:hover i {
  transform: translateX(4px);
}

.start-btn:hover::before {
  width: 100%;
}

.start-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 5px rgba(79, 70, 229, 0.3);
}

/* Performance Chart */
.performance-card {
  background: linear-gradient(to bottom right, rgba(37, 99, 235, 0.02) 0%, rgba(37, 99, 235, 0.08) 100%);
}

.time-filter {
  display: flex;
  gap: 5px;
}

.filter-option {
  padding: 5px 12px;
  font-size: 13px;
  border-radius: 20px;
  background-color: rgba(255, 255, 255, 0.8);
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition-default);
}

.filter-option:hover {
  background-color: rgba(37, 99, 235, 0.1);
  color: var(--primary-color);
}

.filter-option.active {
  background-color: var(--primary-color);
  color: white;
}

.performance-stats {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 15px;
}

.stat-highlight {
  background-color: white;
  border-radius: 12px;
  padding: 15px;
  text-align: center;
  flex: 1;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-default);
  border: 1px solid rgba(0,0,0,0.03);
}

.stat-highlight:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.stat-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 5px;
}

.stat-value span {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-light);
}

.stat-label {
  font-size: 14px;
  color: var(--text-light);
  margin-bottom: 5px;
}

.stat-change {
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
}

.stat-change.positive {
  color: var(--success);
}

.stat-change.negative {
  color: var(--danger);
}

.stat-change.neutral {
  color: var(--text-light);
}

.performance-chart {
  height: 200px;
  margin-bottom: 20px;
  position: relative;
  background-color: white;
  border-radius: 12px;
  padding: 15px;
  box-shadow: var(--shadow-sm);
}

.chart-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.chart-tooltip {
  position: absolute;
  top: 20px;
  right: 20px;
  background-color: rgba(255, 255, 255, 0.9);
  border-radius: 8px;
  padding: 12px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(0, 0, 0, 0.05);
  backdrop-filter: blur(5px);
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

.performance-chart:hover .chart-tooltip {
  opacity: 1;
  transform: translateY(0);
}

.tooltip-date {
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 4px;
}

.tooltip-score {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 4px;
}

.tooltip-change {
  font-size: 12px;
  color: var(--success);
  font-weight: 500;
}

/* Subject Scores */
.subject-scores {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.subject-scores {
  background-color: white;
  border-radius: 12px;
  padding: 15px;
  box-shadow: var(--shadow-sm);
}

.subject-score {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(0,0,0,0.03);
}

.subject-score:last-child {
  border-bottom: none;
}

.subject-info {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 130px;
}

.subject-icon {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.subject-icon.physics {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.subject-icon.chemistry {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}

.subject-icon.math {
  background: linear-gradient(135deg, #10b981, #059669);
}

.subject-name {
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-default);
}

.subject-name:hover {
  color: var(--primary-color);
  transform: translateX(3px);
}

.progress-bar {
  flex: 1;
  height: 8px;
  background-color: rgba(0,0,0,0.05);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.05);
  position: relative;
}

.progress {
  height: 100%;
  position: relative;
  transition: width 1s ease-in-out;
}

.subject-score:nth-child(1) .progress {
  background-image: linear-gradient(90deg, #3b82f6, #2563eb);
}

.subject-score:nth-child(2) .progress {
  background-image: linear-gradient(90deg, #f59e0b, #d97706);
}

.subject-score:nth-child(3) .progress {
  background-image: linear-gradient(90deg, #10b981, #059669);
}

.progress::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, 
    rgba(255,255,255,0.1) 0%, 
    rgba(255,255,255,0.3) 50%, 
    rgba(255,255,255,0.1) 100%);
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.score-value {
  width: 50px;
  text-align: right;
  font-weight: 700;
  font-size: 16px;
  color: var(--text-color);
  background-color: rgba(37, 99, 235, 0.05);
  padding: 4px 10px;
  border-radius: 20px;
}

/* Subscription Card */
.subscription-card {
  background-color: var(--card-bg);
  background-image: linear-gradient(135deg, rgba(37, 99, 235, 0.03) 0%, rgba(59, 130, 246, 0.08) 100%);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  padding: 30px;
  display: flex;
  gap: 40px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(37, 99, 235, 0.1);
  transform: translateZ(0);
  transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.5s ease;
}

.subscription-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 90%;
  height: 200%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.05) 0%, rgba(37, 99, 235, 0) 70%);
  z-index: 0;
  border-radius: 50%;
}

.subscription-card:hover {
  transform: translateY(-10px) translateZ(0) scale(1.02);
  box-shadow: var(--shadow-lg);
}

.subscription-card::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, rgba(99, 102, 241, 0) 70%);
  border-radius: 50%;
}

.subscription-card::after {
  content: '';
  position: absolute;
  bottom: -30px;
  left: -30px;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(249, 115, 22, 0.08) 0%, rgba(249, 115, 22, 0) 70%);
  border-radius: 50%;
}

.subscription-info {
  flex: 1;
  position: relative;
  z-index: 1;
}

.plan-header {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.plan-icon {
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 5px 15px rgba(37, 99, 235, 0.2);
}

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

.subscription-info h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 5px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-tag {
  font-size: 12px;
  font-weight: 600;
  background: var(--gradient-primary);
  color: white;
  padding: 3px 8px;
  border-radius: 20px;
  display: inline-block;
  vertical-align: middle;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  transition: var(--transition-default);
  padding: 8px 12px;
  border-radius: 8px;
  position: relative;
}

.feature-list li:hover {
  background-color: rgba(37, 99, 235, 0.05);
  transform: translateX(5px);
}

.feature-list li i {
  font-size: 16px;
  transition: var(--transition-default);
}

.feature-list li .fa-check-circle {
  color: var(--success);
}

.feature-list li .fa-times-circle {
  color: var(--text-light);
}

.feature-list li:hover i {
  transform: scale(1.2);
}

.feature-list li.disabled {
  color: var(--text-light);
  text-decoration: line-through;
  opacity: 0.7;
}

.plan-selector {
  display: flex;
  gap: 15px;
  margin: 20px 0;
}

.plan-option {
  flex: 1;
  padding: 15px;
  border-radius: 12px;
  background-color: white;
  border: 2px solid rgba(37, 99, 235, 0.1);
  color: var(--text-color);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-default);
  position: relative;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.plan-name {
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 5px;
}

.plan-price {
  font-weight: 700;
  font-size: 20px;
  color: var(--primary-color);
}

.plan-price span {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-light);
}

.best-value {
  position: absolute;
  top: -10px;
  right: -10px;
  background: var(--gradient-accent);
  color: white;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.plan-option:hover {
  transform: translateY(-5px);
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: 0 5px 15px rgba(37, 99, 235, 0.1);
}

.plan-option.active {
  border-color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.03);
}

.plan-option.active::after {
  content: '✓';
  position: absolute;
  top: -10px;
  left: -10px;
  width: 25px;
  height: 25px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: bold;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.upgrade-section {
  flex: 1;
  border-left: 1px solid rgba(0,0,0,0.08);
  padding-left: 30px;
  position: relative;
  z-index: 1;
}

.upgrade-section h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--primary-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.upgrade-section h3 i {
  font-size: 18px;
}

.upgrade-section p {
  color: var(--text-light);
  margin-bottom: 20px;
  font-size: 15px;
}

.upgrade-btn {
  background-image: var(--gradient-accent);
  color: white;
  border: none;
  border-radius: 30px;
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition-default);
  box-shadow: 0 8px 15px rgba(245, 158, 11, 0.3);
  position: relative;
  overflow: hidden;
  z-index: 1;
  width: 100%;
  margin-top: 10px;
}

.upgrade-btn i {
  font-size: 14px;
  transition: transform 0.3s ease;
}

.upgrade-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background-image: linear-gradient(to right, var(--accent-dark), var(--accent-color));
  transition: var(--transition-default);
  z-index: -1;
}

.upgrade-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 25px rgba(245, 158, 11, 0.4);
}

.upgrade-btn:hover i {
  transform: translateX(5px);
}

.upgrade-btn:hover::before {
  width: 100%;
}

.upgrade-btn:active {
  transform: translateY(0);
  box-shadow: 0 4px 8px rgba(245, 158, 11, 0.25);
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .sidebar {
    width: 80px;
    overflow: hidden;
  }
  
  .sidebar-header h2 {
    display: none;
  }
  
  .sidebar-nav a span {
    display: none;
  }
  
  .sidebar-nav a i {
    margin-right: 0;
    font-size: 20px;
  }
  
  .sidebar-footer {
    display: none;
  }
  
  .main-content {
    margin-left: 80px;
  }
}

@media (max-width: 768px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  
  .subscription-card {
    flex-direction: column;
  }
  
  .upgrade-section {
    border-left: none;
    border-top: 1px solid rgba(0,0,0,0.05);
    padding-left: 0;
    padding-top: 20px;
    margin-top: 20px;
  }
}

@media (max-width: 576px) {
  .stats-cards {
    grid-template-columns: 1fr;
  }
  
  .search-container {
    width: 100%;
    max-width: 200px;
  }
}