/* Pages CSS - Page-specific styles */

/* Landing/Welcome Page */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color) 0%, #1e40af 50%, #1d4ed8 100%);
  color: var(--white);
  overflow: hidden;
}

.particle-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.particle-background .particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  animation: particleFloat 6s ease-in-out infinite;
}

.floating-elements {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.floating-elements .floating-shape {
  position: absolute;
  opacity: 0.1;
  animation: floatUpDown 8s ease-in-out infinite;
}

.hero-content {
  text-align: center;
  z-index: 1;
  max-width: 800px;
  padding: 0 var(--spacing-4);
  position: relative;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-6);
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  background: linear-gradient(45deg, #ffffff, #e0e7ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-8);
  opacity: 0.95;
  line-height: var(--line-height-relaxed);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-4);
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  border: none;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.btn-large {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  color: var(--white);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover), #1e3a8a);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

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

.btn-icon {
  transition: transform var(--transition-fast);
}

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

.features-section {
  padding: var(--spacing-20) 0;
  background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
  position: relative;
}

.features-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: linear-gradient(180deg, var(--primary-color) 0%, transparent 100%);
  opacity: 0.05;
}

.section-title {
  text-align: center;
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-12);
  color: var(--gray-900);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
  border-radius: 2px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-8);
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  position: relative;
  background-color: var(--white);
  padding: var(--spacing-8);
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--gray-100);
  transition: all var(--transition-normal);
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--info-color), var(--success-color));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-highlight {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(6, 182, 212, 0.05));
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.feature-card:hover .feature-highlight {
  opacity: 1;
}

.feature-icon {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-4);
  display: block;
  transition: transform var(--transition-normal);
}

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

.feature-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-4);
  color: var(--gray-900);
  position: relative;
  z-index: 1;
}

.feature-card p {
  color: var(--gray-600);
  line-height: var(--line-height-relaxed);
  position: relative;
  z-index: 1;
}

.cta-section {
  padding: var(--spacing-20) 0;
  background: linear-gradient(135deg, var(--gray-900) 0%, var(--gray-800) 100%);
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-4);
  background: linear-gradient(45deg, #ffffff, #e0e7ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-content p {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-8);
  opacity: 0.9;
  color: var(--gray-300);
}

.cta-actions {
  display: flex;
  gap: var(--spacing-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* Scroll animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease-out;
}

.animate-on-scroll.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Keyframe animations */
@keyframes particleFloat {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
    opacity: 0.3;
  }
  25% {
    transform: translateY(-20px) rotate(90deg);
    opacity: 0.6;
  }
  50% {
    transform: translateY(-10px) rotate(180deg);
    opacity: 0.8;
  }
  75% {
    transform: translateY(-30px) rotate(270deg);
    opacity: 0.4;
  }
}

@keyframes floatUpDown {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-40px) rotate(180deg);
  }
}

/* Authentication Pages */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-color) 0%, #1e40af 50%, var(--gray-900) 100%);
  padding: var(--spacing-4);
  position: relative;
  overflow: hidden;
}

.auth-page::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.auth-container {
  width: 100%;
  max-width: 420px;
  position: relative;
  z-index: 1;
}

.auth-card {
  background-color: var(--white);
  padding: var(--spacing-8);
  border-radius: var(--radius-2xl);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.auth-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.auth-header {
  text-align: center;
  margin-bottom: var(--spacing-8);
  position: relative;
}

.back-btn {
  position: absolute;
  left: 0;
  top: 0;
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--gray-600);
  cursor: pointer;
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.back-btn:hover {
  background-color: var(--gray-100);
  color: var(--gray-900);
  transform: translateX(-2px);
}

.auth-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-2);
  color: var(--gray-900);
  background: linear-gradient(135deg, var(--gray-900), var(--primary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-subtitle {
  color: var(--gray-600);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
}

.auth-form {
  margin-bottom: var(--spacing-6);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrapper .form-input {
  padding-right: var(--spacing-12);
}

.input-wrapper:focus-within .input-icon {
  color: var(--primary-color);
  transform: scale(1.1);
}

.input-icon {
  position: absolute;
  right: var(--spacing-4);
  color: var(--gray-400);
  font-size: var(--font-size-lg);
  pointer-events: none;
  transition: all var(--transition-fast);
  z-index: 1;
}

.password-toggle {
  position: absolute;
  right: var(--spacing-4);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.password-toggle:hover {
  background-color: var(--gray-100);
  transform: scale(1.05);
}

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

.toggle-icon {
  font-size: var(--font-size-lg);
  opacity: 0.6;
  transition: opacity var(--transition-fast);
}

.password-toggle:hover .toggle-icon {
  opacity: 0.9;
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-6);
}

.forgot-password-link {
  font-size: var(--font-size-sm);
  color: var(--primary-color);
  text-decoration: none;
  transition: all var(--transition-fast);
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
}

.forgot-password-link:hover {
  background-color: var(--primary-light);
  text-decoration: none;
}

.auth-divider {
  position: relative;
  text-align: center;
  margin: var(--spacing-6) 0;
}

.auth-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background-color: var(--gray-200);
}

.auth-divider span {
  background-color: var(--white);
  color: var(--gray-500);
  padding: 0 var(--spacing-4);
  font-size: var(--font-size-sm);
  position: relative;
  z-index: 1;
}

.social-login {
  margin-bottom: var(--spacing-4);
}

.social-btn {
  justify-content: center;
  gap: var(--spacing-3);
}

.auth-footer {
  text-align: center;
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--gray-200);
}

.auth-link {
  color: var(--primary-color);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  transition: all var(--transition-fast);
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
}

.auth-link:hover {
  background-color: var(--primary-light);
  text-decoration: none;
}

/* Password Recovery Styles */
.recovery-steps {
  position: relative;
}

.recovery-step {
  transition: all var(--transition-normal);
}

.recovery-step.hidden {
  display: none;
}

.success-message {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.success-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-4);
  animation: bounceIn 0.6s ease-out;
}

.success-message h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-3);
  color: var(--gray-900);
}

.success-message p {
  color: var(--gray-600);
  margin-bottom: var(--spacing-2);
  line-height: var(--line-height-relaxed);
}

.help-text {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
}

.recovery-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

/* Enhanced Form Styles */
.form-input {
  transition: all var(--transition-fast);
  position: relative;
}

.form-input:focus {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.form-error {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-top: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--error-color);
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
}

.form-error.show {
  opacity: 1;
  transform: translateY(0);
}

.form-error::before {
  content: '⚠️';
  font-size: var(--font-size-sm);
}

/* Button Loading State */
.btn-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none !important;
}

.btn:disabled .btn-text,
.btn:disabled .btn-icon {
  opacity: 0;
}

/* Notification Container */
.notification-container {
  position: fixed;
  top: var(--spacing-4);
  right: var(--spacing-4);
  z-index: var(--z-modal);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.notification {
  padding: var(--spacing-4) var(--spacing-6);
  border-radius: var(--radius-lg);
  color: var(--white);
  font-weight: var(--font-weight-medium);
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  animation: slideInRight 0.3s ease-out forwards;
  max-width: 400px;
}

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

.notification.error {
  background-color: var(--error-color);
}

.notification.info {
  background-color: var(--info-color);
}

.notification.warning {
  background-color: var(--warning-color);
}

.notification.exit {
  animation: slideOutRight 0.3s ease-in forwards;
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOutRight {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* Multi-step Form */
.multi-step-form {
  position: relative;
}

.form-step {
  display: none;
}

.form-step.active {
  display: block;
}

.form-navigation {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-3);
  margin-top: var(--spacing-6);
}

/* App Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
  background-color: var(--gray-50);
}

.sidebar {
  width: 280px;
  background-color: var(--white);
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-6);
  border-bottom: 1px solid var(--gray-200);
}

.logo h2 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
  margin: 0;
}

.sidebar-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
}

.sidebar-toggle span {
  width: 20px;
  height: 2px;
  background-color: var(--gray-600);
  transition: var(--transition-fast);
}

.nav-menu {
  flex: 1;
  padding: var(--spacing-4);
}

.sidebar-footer {
  padding: var(--spacing-4);
  border-top: 1px solid var(--gray-200);
}

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.page-header {
  background-color: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: var(--spacing-6);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}

.page-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  margin: 0;
}

.header-actions {
  display: flex;
  gap: var(--spacing-3);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.welcome-text {
  color: var(--gray-600);
  font-size: var(--font-size-base);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--gray-200);
}

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

/* Dashboard Specific */
.dashboard-content {
  flex: 1;
  padding: var(--spacing-6);
  overflow-y: auto;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.stats-section {
  margin-bottom: var(--spacing-12);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-6);
}

.stat-card {
  background-color: var(--white);
  padding: var(--spacing-6);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Clickable Stat Card Styles */
.stat-card.clickable-stat {
  position: relative;
  text-decoration: none;
  color: inherit;
  cursor: pointer;
  overflow: hidden;
}

.stat-card.clickable-stat::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  transform: scaleY(0);
  transition: transform var(--transition-normal);
}

.stat-card.clickable-stat:hover::before {
  transform: scaleY(1);
}

.stat-card.clickable-stat:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.stat-card.clickable-stat .stat-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-left: auto;
  color: var(--gray-400);
  font-size: var(--font-size-sm);
  transition: all var(--transition-normal);
  opacity: 0.6;
}

.stat-card.clickable-stat:hover .stat-arrow {
  color: var(--primary-color);
  transform: translateX(4px);
  opacity: 1;
}

.stat-card.clickable-stat:active {
  transform: translateY(-1px);
  transition: transform 0.1s ease;
}

.stat-icon {
  font-size: 2.5rem;
  opacity: 0.8;
}

.stat-content {
  flex: 1;
}

.stat-value {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  margin: 0;
}

.stat-label {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  margin: 0;
}

.quick-actions-section {
  margin-bottom: var(--spacing-12);
}

.actions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-6);
}

.action-card {
  background-color: var(--white);
  padding: var(--spacing-8);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.action-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-4);
}

.action-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-3);
  color: var(--gray-900);
}

.action-card p {
  color: var(--gray-600);
  margin-bottom: var(--spacing-6);
}

.recent-activity-section {
  margin-bottom: var(--spacing-12);
}

.activity-timeline {
  background-color: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-6);
}

.activity-item {
  display: flex;
  gap: var(--spacing-4);
  padding: var(--spacing-4) 0;
  border-bottom: 1px solid var(--gray-200);
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-icon {
  font-size: var(--font-size-xl);
  opacity: 0.7;
}

.activity-content {
  flex: 1;
}

.activity-content h4 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-1);
  color: var(--gray-900);
}

.activity-content p {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-1);
}

.activity-time {
  color: var(--gray-400);
  font-size: var(--font-size-xs);
}

.progress-section {
  margin-bottom: var(--spacing-12);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-6);
}

.chart-container {
  background-color: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-6);
  position: relative;
  overflow: hidden;
}

.chart-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--info-color), var(--success-color));
}

/* Subject Progress Section */
.subjects-section {
  margin-bottom: var(--spacing-12);
}

.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-6);
}

.subject-card {
  background-color: var(--white);
  padding: var(--spacing-6);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.subject-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.subject-card:hover::before {
  transform: scaleX(1);
}

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

.subject-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-3);
  display: block;
  transition: transform var(--transition-normal);
}

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

.subject-card h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-4);
  color: var(--gray-900);
}

.progress-ring {
  position: relative;
  display: inline-block;
  margin-bottom: var(--spacing-3);
}

.progress-ring-svg {
  transform: rotate(-90deg);
}

.progress-ring-circle-bg {
  fill: none;
  stroke: var(--gray-200);
  stroke-width: 6;
}

.progress-ring-circle {
  fill: none;
  stroke: var(--primary-color);
  stroke-width: 6;
  stroke-linecap: round;
  stroke-dasharray: 220;
  stroke-dashoffset: 220;
  transition: stroke-dashoffset 1.5s ease-out;
}

.progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
}

.subject-stats {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  margin: 0 0 var(--spacing-2) 0;
}

.subject-trend {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xs);
  color: var(--gray-500);
}

.trend-indicator {
  font-size: var(--font-size-sm);
}

.trend-text.positive {
  color: var(--success-color);
}

.trend-text.negative {
  color: var(--error-color);
}

/* Achievement System */
.achievements-section {
  margin-bottom: var(--spacing-12);
}

.achievements-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-6);
}

.achievement-card {
  background-color: var(--white);
  padding: var(--spacing-6);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.achievement-card.locked {
  opacity: 0.7;
  filter: grayscale(0.5);
}

.achievement-card.unlocked {
  opacity: 1;
  filter: none;
  border: 2px solid var(--success-color);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.achievement-card.unlocked::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(6, 182, 212, 0.1));
  pointer-events: none;
}

.achievement-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.achievement-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-3);
  display: block;
  transition: transform var(--transition-normal);
}

.achievement-card.unlocked .achievement-icon {
  animation: achievementPulse 2s ease-in-out infinite;
}

.achievement-card h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-2);
  color: var(--gray-900);
}

.achievement-card p {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-4);
  line-height: var(--line-height-relaxed);
}

.achievement-progress {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.achievement-progress .progress-bar {
  height: 6px;
  background-color: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.achievement-progress .progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--success-color));
  border-radius: var(--radius-full);
  transition: width 1s ease-out;
}

.achievement-progress .progress-text {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
  font-weight: var(--font-weight-medium);
}

/* Timeline Section */
.timeline-section {
  margin-bottom: var(--spacing-12);
}

.timeline-container {
  background-color: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: var(--spacing-6);
  position: relative;
}

.timeline-item {
  display: flex;
  gap: var(--spacing-4);
  padding: var(--spacing-4) 0;
  position: relative;
}

.timeline-item:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 15px;
  top: 60px;
  bottom: -20px;
  width: 2px;
  background: linear-gradient(180deg, var(--primary-color), var(--gray-200));
}

.timeline-marker {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  border: 3px solid var(--white);
  box-shadow: 0 0 0 3px var(--primary-light);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.timeline-marker.milestone {
  background: linear-gradient(135deg, var(--success-color), #059669);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
  animation: milestonePulse 2s ease-in-out infinite;
}

.timeline-content {
  flex: 1;
  padding-top: var(--spacing-1);
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-2);
}

.timeline-header h4 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--gray-900);
  margin: 0;
}

.timeline-date {
  font-size: var(--font-size-sm);
  color: var(--gray-500);
  font-weight: var(--font-weight-medium);
}

.timeline-content p {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-3);
  line-height: var(--line-height-relaxed);
}

.timeline-stats {
  display: flex;
  gap: var(--spacing-2);
  flex-wrap: wrap;
}

.stat-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-3);
  background-color: var(--primary-light);
  color: var(--primary-color);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
}

.stat-badge.success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
}

.stat-badge.warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--warning-color);
}

.stat-badge.error {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--error-color);
}

/* Animations */
@keyframes achievementPulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}

@keyframes milestonePulse {
  0%, 100% {
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(16, 185, 129, 0.4);
  }
}

@keyframes unlockSparkle {
  0%, 100% {
    opacity: 0;
    transform: scale(0.5) rotate(0deg);
  }
  50% {
    opacity: 1;
    transform: scale(1.2) rotate(180deg);
  }
}

/* Subject Detail Modal */
.subject-detail-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-6);
}

.detail-stat {
  text-align: center;
  padding: var(--spacing-4);
  background-color: var(--gray-50);
  border-radius: var(--radius-lg);
}

.detail-label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--gray-600);
  margin-bottom: var(--spacing-1);
}

.detail-value {
  display: block;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
}

.subject-recommendations h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-3);
  color: var(--gray-900);
}

.subject-recommendations ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.subject-recommendations li {
  padding: var(--spacing-2) 0;
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  position: relative;
  padding-left: var(--spacing-6);
}

.subject-recommendations li::before {
  content: '💡';
  position: absolute;
  left: 0;
  top: var(--spacing-2);
}

/* Exam Interface */
.exam-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background-color: var(--gray-50);
}

.exam-header {
  background-color: var(--white);
  border-bottom: 1px solid var(--gray-200);
  padding: var(--spacing-4) var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}

.exam-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.exam-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--gray-900);
  margin: 0;
}

.exam-meta {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
}

.exam-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.timer-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-4);
  background-color: var(--gray-100);
  border-radius: var(--radius-lg);
}

.timer {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.timer-text {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--gray-900);
}

.exam-content {
  flex: 1;
  display: flex;
  overflow: hidden;
}

.question-nav {
  width: 280px;
  background-color: var(--white);
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.nav-header {
  padding: var(--spacing-4);
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-header h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin: 0;
}

.nav-toggle {
  display: none;
}

.question-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-2);
  padding: var(--spacing-4);
}

.question-nav-item {
  aspect-ratio: 1;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.question-nav-item:hover {
  background-color: var(--gray-100);
}

.question-nav-item.current {
  background-color: var(--primary-color);
  color: var(--white);
  border-color: var(--primary-color);
}

.question-nav-item.answered {
  background-color: var(--success-color);
  color: var(--white);
  border-color: var(--success-color);
}

.question-nav-item.flagged {
  background-color: var(--warning-color);
  color: var(--white);
  border-color: var(--warning-color);
}

.nav-legend {
  padding: var(--spacing-4);
  border-top: 1px solid var(--gray-200);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-2);
  font-size: var(--font-size-sm);
}

.legend-indicator {
  width: 16px;
  height: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-300);
}

.legend-indicator.answered {
  background-color: var(--success-color);
  border-color: var(--success-color);
}

.legend-indicator.flagged {
  background-color: var(--warning-color);
  border-color: var(--warning-color);
}

.legend-indicator.current {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.question-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.question-container {
  flex: 1;
  padding: var(--spacing-8);
  overflow-y: auto;
  background-color: var(--white);
}

.question-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--gray-500);
}

.question-actions {
  padding: var(--spacing-6);
  border-top: 1px solid var(--gray-200);
  background-color: var(--gray-50);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.action-buttons-left,
.action-buttons-right {
  display: flex;
  gap: var(--spacing-3);
}

/* Search Components */
.search-container {
  position: relative;
  max-width: 400px;
}

.search-input {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-12) var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-btn {
  position: absolute;
  right: var(--spacing-3);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--font-size-lg);
  color: var(--gray-400);
  transition: color var(--transition-fast);
}

.search-btn:hover {
  color: var(--gray-600);
}/*
 Registration Page Specific Styles */
.step-intro {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.step-intro h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-2);
  color: var(--gray-900);
}

.step-intro p {
  color: var(--gray-600);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
}

/* Profile Picture Upload */
.profile-upload-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-4);
}

.profile-preview {
  position: relative;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 4px solid var(--gray-200);
}

.profile-preview:hover {
  border-color: var(--primary-color);
  transform: scale(1.05);
}

.profile-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.upload-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-normal);
  color: var(--white);
}

.profile-preview:hover .upload-overlay {
  opacity: 1;
}

.upload-icon {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-1);
}

.upload-text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

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

.upload-hint {
  font-size: var(--font-size-sm);
  color: var(--gray-600);
  margin-bottom: var(--spacing-1);
}

.upload-requirements {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
}

.file-input {
  display: none;
}

/* Password Strength Indicator */
.password-strength {
  margin-top: var(--spacing-2);
}

.strength-bar {
  width: 100%;
  height: 4px;
  background-color: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--spacing-1);
}

.strength-fill {
  height: 100%;
  width: 0%;
  transition: all var(--transition-normal);
  border-radius: var(--radius-full);
}

.strength-fill.weak {
  width: 25%;
  background-color: var(--error-color);
}

.strength-fill.fair {
  width: 50%;
  background-color: var(--warning-color);
}

.strength-fill.good {
  width: 75%;
  background-color: var(--info-color);
}

.strength-fill.strong {
  width: 100%;
  background-color: var(--success-color);
}

.strength-text {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
  transition: color var(--transition-fast);
}

.strength-text.weak {
  color: var(--error-color);
}

.strength-text.fair {
  color: var(--warning-color);
}

.strength-text.good {
  color: var(--info-color);
}

.strength-text.strong {
  color: var(--success-color);
}

/* Subject Selection Grid */
.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--spacing-3);
  margin-top: var(--spacing-3);
}

.subject-checkbox {
  cursor: pointer;
}

.subject-checkbox input[type="checkbox"] {
  display: none;
}

.subject-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  background-color: var(--white);
}

.subject-card:hover {
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.subject-checkbox input:checked + .subject-card {
  border-color: var(--primary-color);
  background-color: var(--primary-light);
}

.subject-icon {
  font-size: var(--font-size-2xl);
}

.subject-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--gray-700);
  text-align: center;
}

.subject-checkbox input:checked + .subject-card .subject-name {
  color: var(--primary-color);
}

/* Success Modal */
.success-animation {
  text-align: center;
  padding: var(--spacing-8);
}

.success-checkmark {
  font-size: 5rem;
  margin-bottom: var(--spacing-6);
  animation: bounceIn 0.8s ease-out;
}

.success-animation h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-4);
  color: var(--gray-900);
  background: linear-gradient(135deg, var(--success-color), var(--primary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.success-animation p {
  font-size: var(--font-size-lg);
  color: var(--gray-600);
  margin-bottom: var(--spacing-8);
  line-height: var(--line-height-relaxed);
}

/* Multi-step Form Enhancements */
.form-step {
  min-height: 400px;
  transition: all var(--transition-normal);
}

.form-step:not(.active) {
  display: none;
}

.form-navigation {
  display: flex;
  justify-content: space-between;
  gap: var(--spacing-3);
  margin-top: var(--spacing-8);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--gray-200);
}

.form-navigation .btn {
  min-width: 120px;
}

/* Progress Indicator Enhancements */
.progress-indicator {
  margin-bottom: var(--spacing-10);
}

.progress-step {
  position: relative;
}

.progress-step::after {
  background: linear-gradient(90deg, var(--gray-200) 0%, var(--gray-300) 100%);
}

.progress-step.active::after,
.progress-step.completed::after {
  background: linear-gradient(90deg, var(--primary-color) 0%, var(--info-color) 100%);
}

.progress-step.completed .step-number {
  background-color: var(--success-color);
  color: var(--white);
}

.progress-step.completed .step-number::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: var(--font-size-sm);
}

.progress-step.completed .step-number {
  font-size: 0;
}

/* Enhanced Input Styles */
.input-wrapper .form-select {
  padding-right: var(--spacing-12);
  appearance: none;
  background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6,9 12,15 18,9"></polyline></svg>');
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
}

#confirm-icon {
  transition: all var(--transition-fast);
}

#confirm-icon.valid {
  color: var(--success-color);
}

#confirm-icon.invalid {
  color: var(--error-color);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .subjects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .form-navigation {
    flex-direction: column;
  }
  
  .profile-preview {
    width: 100px;
    height: 100px;
  }
}/* Exa
m Interface Styles */
.question-content {
  padding: var(--spacing-6);
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-6);
  padding-bottom: var(--spacing-4);
  border-bottom: 2px solid var(--gray-200);
}

.question-header h2 {
  color: var(--primary-color);
  margin: 0;
}

.question-meta {
  display: flex;
  gap: var(--spacing-3);
  flex-wrap: wrap;
}

.question-meta span {
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

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

.difficulty {
  background: var(--warning-light);
  color: var(--warning-color);
}

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

.question-text {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-6);
  color: var(--gray-800);
}

.equations-section, .given-data-section {
  margin: var(--spacing-6) 0;
  padding: var(--spacing-4);
  background: var(--gray-50);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-color);
}

.equations-section h4, .given-data-section h4 {
  margin: 0 0 var(--spacing-3) 0;
  color: var(--primary-color);
  font-size: var(--font-size-base);
}

.equations-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.equation-item {
  padding: var(--spacing-3);
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
  text-align: center;
}

.given-data-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-2);
}

.data-item {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-2);
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-200);
}

.data-label {
  font-weight: var(--font-weight-medium);
  color: var(--gray-700);
}

.data-value {
  font-family: var(--font-family-mono);
  color: var(--gray-900);
}

.answer-section {
  margin-top: var(--spacing-8);
}

.answer-section h3 {
  margin-bottom: var(--spacing-4);
  color: var(--gray-800);
}

.answer-input-container {
  position: relative;
}

.answer-input {
  width: 100%;
  min-height: 200px;
  padding: var(--spacing-4);
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-lg);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  resize: vertical;
  transition: border-color var(--transition-fast);
}

.answer-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.answer-tools {
  display: flex;
  gap: var(--spacing-2);
  margin-top: var(--spacing-3);
}

.solution-section {
  margin-top: var(--spacing-6);
  padding: var(--spacing-4);
  background: var(--success-light);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--success-color);
}

.solution-section h3 {
  color: var(--success-color);
  margin-bottom: var(--spacing-3);
}

.solution-content {
  font-family: var(--font-family-mono);
  line-height: var(--line-height-relaxed);
  color: var(--gray-800);
}

/* Question Navigation */
.question-nav-item {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--gray-700);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.question-nav-item.current {
  border-color: var(--primary-color);
  background: var(--primary-color);
  color: var(--white);
}

.question-nav-item.answered {
  border-color: var(--success-color);
  background: var(--success-light);
  color: var(--success-color);
}

.question-nav-item.answered.current {
  background: var(--success-color);
  color: var(--white);
}

.question-nav-item.flagged {
  border-color: var(--warning-color);
  background: var(--warning-light);
  color: var(--warning-color);
}

.question-nav-item.flagged.current {
  background: var(--warning-color);
  color: var(--white);
}

.question-nav-item.flagged::after {
  content: '🚩';
  position: absolute;
  top: -5px;
  right: -5px;
  font-size: 12px;
}

/* Exam Results */
.exam-results {
  text-align: center;
  padding: var(--spacing-8);
}

.exam-results h2 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-6);
  font-size: var(--font-size-3xl);
}

.results-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-8);
}

.result-item {
  padding: var(--spacing-4);
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
}

.result-item .label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--gray-600);
  margin-bottom: var(--spacing-1);
}

.result-item .value {
  display: block;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--primary-color);
}

.results-actions {
  display: flex;
  gap: var(--spacing-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* Loading State */
.question-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-8);
  color: var(--gray-500);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--gray-200);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--spacing-4);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
  .question-header {
    flex-direction: column;
    gap: var(--spacing-3);
  }
  
  .question-meta {
    justify-content: flex-start;
  }
  
  .given-data-list {
    grid-template-columns: 1fr;
  }
  
  .results-summary {
    grid-template-columns: 1fr;
  }
  
  .results-actions {
    flex-direction: column;
  }
}/* Erro
r Message Styles */
.error-message {
  text-align: center;
  padding: var(--spacing-8);
  color: var(--error-color);
}

.error-message h2 {
  color: var(--error-color);
  margin-bottom: var(--spacing-4);
}

.error-message p {
  margin-bottom: var(--spacing-6);
  color: var(--gray-600);
}/* In
line Equation Editor */
.inline-equation-editor {
  margin-top: var(--spacing-4);
  padding: var(--spacing-4);
  background: var(--gray-50);
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  animation: slideDown 0.3s ease-out;
}

.inline-editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-3);
  padding-bottom: var(--spacing-2);
  border-bottom: 1px solid var(--gray-300);
}

.inline-editor-header h4 {
  margin: 0;
  color: var(--primary-color);
  font-size: var(--font-size-base);
}

.close-inline-editor {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--gray-500);
  cursor: pointer;
  padding: var(--spacing-1);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.close-inline-editor:hover {
  background: var(--gray-200);
  color: var(--gray-700);
}

.inline-functions {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-3);
}

.inline-function-btn {
  padding: var(--spacing-2);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--gray-700);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.inline-function-btn:hover {
  border-color: var(--primary-color);
  background: var(--primary-light);
  color: var(--primary-color);
  transform: translateY(-1px);
}

.inline-function-btn:active {
  transform: translateY(0);
  background: var(--primary-color);
  color: var(--white);
}

.inline-variables {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(40px, 1fr));
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-3);
}

.inline-var-btn {
  aspect-ratio: 1;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--gray-700);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 35px;
}

.inline-var-btn:hover {
  border-color: var(--primary-color);
  background: var(--primary-light);
  color: var(--primary-color);
  transform: scale(1.05);
}

.inline-var-btn:active {
  transform: scale(0.95);
  background: var(--primary-color);
  color: var(--white);
}

.inline-input-section {
  display: flex;
  gap: var(--spacing-2);
  align-items: center;
}

#inline-equation-input {
  flex: 1;
  padding: var(--spacing-3);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  background: var(--white);
  transition: border-color var(--transition-fast);
}

#inline-equation-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

/* Enhanced Answer Tools */
.answer-tools {
  display: flex;
  gap: var(--spacing-2);
  margin-top: var(--spacing-3);
  flex-wrap: wrap;
}

.answer-tools .btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  font-size: var(--font-size-sm);
}

/* Step formatting in answer */
.answer-input {
  font-family: var(--font-family-base);
  line-height: var(--line-height-relaxed);
}

/* Animations */
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
    max-height: 0;
  }
  to {
    opacity: 1;
    transform: translateY(0);
    max-height: 300px;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .inline-functions {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .inline-variables {
    grid-template-columns: repeat(6, 1fr);
  }
  
  .inline-input-section {
    flex-direction: column;
    align-items: stretch;
  }
  
  .inline-input-section .btn {
    margin-top: var(--spacing-2);
  }
  
  .answer-tools {
    flex-direction: column;
  }
  
  .answer-tools .btn {
    justify-content: center;
  }
}

/* Button click feedback */
.inline-function-btn.clicked,
.inline-var-btn.clicked {
  animation: buttonClick 0.2s ease-out;
}

@keyframes buttonClick {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
    background: var(--success-color);
    color: var(--white);
  }
  100% {
    transform: scale(1);
  }
}

/* Inline insert feedback */
.inline-insert-feedback {
  animation: slideInRight 0.3s ease-out;
}

/* Enhanced answer input for step formatting */
.answer-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Step highlighting in answer */
.answer-input {
  background: linear-gradient(to right, 
    transparent 0%, 
    transparent 2px, 
    var(--gray-50) 2px, 
    var(--gray-50) 100%);
  background-size: 100% 1.5em;
  background-repeat: repeat-y;
}

/* Subject Selection Page Styles */
.subject-selection-content {
  flex: 1;
  padding: var(--spacing-6);
  overflow-y: auto;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.page-subtitle {
  color: var(--gray-600);
  font-size: var(--font-size-base);
  margin: var(--spacing-2) 0 0 0;
  font-weight: var(--font-weight-normal);
}

/* Exam Configuration Section */
.exam-config-section {
  margin-bottom: var(--spacing-12);
}

.config-card {
  background-color: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-8);
  border: 1px solid var(--gray-200);
  position: relative;
  overflow: hidden;
}

.config-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--info-color), var(--success-color));
}

.config-header {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.config-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  margin-bottom: var(--spacing-2);
}

.config-subtitle {
  color: var(--gray-600);
  font-size: var(--font-size-base);
  margin: 0;
}

.config-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.config-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-8);
}

.config-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.config-label {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--gray-700);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.config-select {
  padding: var(--spacing-3) var(--spacing-4);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  background-color: var(--white);
  color: var(--gray-900);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.config-select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.config-select:hover {
  border-color: var(--gray-400);
}

.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.checkbox-text {
  font-size: var(--font-size-sm);
  color: var(--gray-700);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.radio-label {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  cursor: pointer;
  user-select: none;
}

.radio-custom {
  position: relative;
  width: 20px;
  height: 20px;
  border: 2px solid var(--gray-300);
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.radio-label input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-label input[type="radio"]:checked + .radio-custom {
  border-color: var(--primary-color);
  background-color: var(--primary-color);
}

.radio-label input[type="radio"]:checked + .radio-custom::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background-color: var(--white);
  border-radius: 50%;
}

.radio-text {
  font-size: var(--font-size-sm);
  color: var(--gray-700);
}

/* Subject Selection Grid */
.subjects-selection-section {
  margin-bottom: var(--spacing-12);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-10);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  margin-bottom: var(--spacing-3);
}

.section-subtitle {
  color: var(--gray-600);
  font-size: var(--font-size-lg);
  margin: 0;
}

.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-8);
}

.subject-card {
  background-color: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-normal);
  border: 1px solid var(--gray-200);
  position: relative;
  cursor: pointer;
}

.subject-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.subject-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--primary-hover));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.subject-card:hover::before {
  transform: scaleX(1);
}

.subject-header {
  padding: var(--spacing-6) var(--spacing-6) var(--spacing-4) var(--spacing-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.subject-icon-large {
  font-size: 3.5rem;
  transition: transform var(--transition-normal);
}

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

.subject-badge {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  color: var(--white);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.subject-content {
  padding: 0 var(--spacing-6) var(--spacing-4) var(--spacing-6);
}

.subject-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  margin-bottom: var(--spacing-2);
}

.subject-description {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--spacing-4);
}

.subject-stats {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-xs);
  color: var(--gray-500);
}

.stat-icon {
  font-size: var(--font-size-sm);
}

.stat-text {
  font-weight: var(--font-weight-medium);
}

.subject-topics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
}

.topic-tag {
  background-color: var(--gray-100);
  color: var(--gray-700);
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-fast);
}

.subject-card:hover .topic-tag {
  background-color: var(--primary-light);
  color: var(--primary-color);
}

.subject-footer {
  padding: var(--spacing-4) var(--spacing-6) var(--spacing-6) var(--spacing-6);
}

.subject-select-btn {
  position: relative;
  overflow: hidden;
}

.subject-select-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-slow);
}

.subject-select-btn:hover::before {
  left: 100%;
}

/* Quick Stats Section */
.quick-stats-section {
  margin-bottom: var(--spacing-12);
}

.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-6);
}

.stat-box {
  background-color: var(--white);
  padding: var(--spacing-6);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: all var(--transition-normal);
  border: 1px solid var(--gray-200);
}

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

.stat-icon-large {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-3);
  display: block;
}

.stat-number {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  margin-bottom: var(--spacing-1);
}

.stat-label {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* Tips Section */
.tips-section {
  margin-bottom: var(--spacing-8);
}

.tips-card {
  background: linear-gradient(135deg, var(--primary-light), var(--white));
  border-radius: var(--radius-xl);
  padding: var(--spacing-8);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--primary-color);
}

.tips-header {
  text-align: center;
  margin-bottom: var(--spacing-6);
}

.tips-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--gray-900);
  margin: 0;
}

.tips-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-4);
}

.tip-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  padding: var(--spacing-3);
  background-color: rgba(255, 255, 255, 0.7);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.tip-item:hover {
  background-color: var(--white);
  transform: translateX(4px);
}

.tip-icon {
  font-size: var(--font-size-lg);
  flex-shrink: 0;
  margin-top: 2px;
}

.tip-text {
  font-size: var(--font-size-sm);
  color: var(--gray-700);
  line-height: var(--line-height-relaxed);
}

/* Responsive Design for Subject Selection */
@media (max-width: 1024px) {
  .config-row {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .subjects-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
  }
}

@media (max-width: 768px) {
  .subject-selection-content {
    padding: var(--spacing-4);
  }
  
  .config-card {
    padding: var(--spacing-6);
  }
  
  .subjects-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-container {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .tips-content {
    grid-template-columns: 1fr;
  }
  
  .subject-header {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-3);
  }
}

@media (max-width: 480px) {
  .stats-container {
    grid-template-columns: 1fr;
  }
  
  .config-title {
    font-size: var(--font-size-xl);
  }
  
  .section-title {
    font-size: var(--font-size-2xl);
  }
}