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

body {
  font-family: "Inter", sans-serif;
  background: #000000;
  min-height: 100vh;
  color: #ffffff;
}

/* View Management */
.view {
  display: none;
  min-height: 100vh;
}

.view.active {
  display: block;
}

/* Login View Styles */
.login-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.login-card {
  background: rgba(40, 40, 40, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.login-header i {
  font-size: 3rem;
  color: #667eea;
  margin-bottom: 20px;
}

.login-header h1,
.header-left h1,
.hero-section h2,
.week-header h2,
.section h3,
.topic-item h4,
.topic-header h4,
.practice-link-content h4,
.week-title {
  color: #ff0000;
}

.login-header p {
  color: #ffffff;
  margin-bottom: 30px;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.input-group i {
  position: absolute;
  left: 15px;
  color: #667eea;
  z-index: 1;
}

.input-group input {
  width: 100%;
  padding: 15px 15px 15px 45px;
  border: 2px solid #e1e5e9;
  border-radius: 10px;
  font-size: 16px;
  transition: all 0.3s ease;
  background: #f8f9fa;
}

.input-group input:focus {
  outline: none;
  border-color: #667eea;
  background: white;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.login-btn {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 15px 30px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.login-footer {
  margin-top: 20px;
  color: #666;
  font-size: 14px;
}

/* App Header */
.app-header {
  background: rgba(40, 40, 40, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding: 20px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 15px;
}

.header-left i {
  font-size: 1.5rem;
  color: #667eea;
}

.header-left h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #ff0000;
}

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

.welcome-text {
  color: #ffffff;
  font-weight: 500;
}

.logout-btn {
  background: #ff0000;
  color: white;
  padding: 10px 18px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease, transform 0.1s ease;
}

.logout-btn:hover {
  background: #008000;
  transform: translateY(-1px);
}

.logout-btn i {
  color: white;
  font-size: 20px;
  margin-right: 8px;
}

.back-btn {
  background: #000080;
  margin-right: 15px;
  color: white;
  padding: 10px 18px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease, transform 0.1s ease;
}

.back-btn:hover {
  background: #008000;
  transform: translateY(-1px);
}

.back-btn i {
  color: #ffd700;
  font-size: 20px;
  margin-right: 8px;
}

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

.hero-section {
  text-align: center;
  margin-bottom: 50px;
  color: white;
}

.hero-section h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: #ff0000;
}

.hero-section p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  opacity: 0.9;
  color: #ffffff;
}

.progress-overview {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 30px;
}

.progress-item {
  text-align: center;
}

.progress-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: #ffd700;
}

.progress-label {
  font-size: 0.9rem;
  opacity: 0.8;
  color: #ffffff;
}

/* Weeks Grid */
.weeks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  margin-top: 40px;
}

.week-card {
  background: rgba(40, 40, 40, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 30px;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
  color: #ffffff;
}

.week-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #667eea, #764ba2);
}

.week-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
  border-color: #667eea;
}

.week-card.completed::before {
  background: linear-gradient(90deg, #4caf50, #45a049);
}

.week-number {
  font-size: 1.2rem;
  font-weight: 700;
  color: #667eea;
  margin-bottom: 10px;
}

.week-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: #ff0000;
}

.week-description {
  color: #ffffff;
  margin-bottom: 15px;
  line-height: 1.5;
}

.week-progress-bar {
  background: #e1e5e9;
  height: 6px;
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 10px;
}

.week-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #4caf50, #45a049);
  transition: width 0.3s ease;
}

.week-stats {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: #ffffff;
}

/* Week Detail View */
.week-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 20px;
}

.week-header {
  text-align: center;
  margin-bottom: 40px;
  color: white;
}

.week-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: #ff0000;
}

.week-header p {
  font-size: 1.1rem;
  opacity: 0.9;
  color: #ffffff;
}

.week-progress {
  background: rgba(255, 255, 255, 0.2);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  color: white;
}

.week-sections {
  display: grid;
  gap: 30px;
}

.section {
  background: rgba(40, 40, 40, 0.95);
  backdrop-filter: blur(10px);
  border-radius: 15px;
  padding: 30px;
  color: #ffffff;
}

.section h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: #ff0000;
}

.section h3 i {
  color: #667eea;
}

/* Topics List */
.topics-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 15px;
}

.topic-item {
  background: #333333;
  padding: 15px;
  border-radius: 10px;
  border-left: 4px solid #667eea;
  color: #ffffff;
}

.topic-item h4 {
  font-weight: 600;
  margin-bottom: 5px;
  color: #ff0000;
}

.topic-item p {
  font-size: 0.9rem;
  color: #ffffff;
}

/* Tasks List */
.tasks-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.topic-header {
  margin: 20px 0 10px 0;
  padding: 10px 0;
  border-bottom: 2px solid #667eea;
}

.topic-header h4 {
  color: #ff0000;
  font-weight: 600;
  font-size: 1.1rem;
  margin: 0;
}

.task-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  padding: 15px;
  background: #e7e7e7;
  border-radius: 10px;
  transition: all 0.3s ease;
  color: #ffffff;
}

.task-item:hover {
  background: #e9ecef;
}

.task-checkbox {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  cursor: pointer;
}

.task-content {
  flex: 1;
}

.task-title {
  font-weight: 600;
  margin-bottom: 5px;
  color: #333;
}

.task-title a {
  color: #002236d8;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.task-title a:hover {
  color: #008000;
  text-decoration: underline;
}

.task-description {
  font-size: 0.9rem;
  color: #ffffff;
  line-height: 1.4;
}

.task-item.completed .task-title {
  text-decoration: line-through;
  color: #999;
}

.task-item.completed .task-title a {
  color: #999;
  text-decoration: line-through;
}

.task-item.completed .task-description {
  color: #999;
}

/* Practice Links */
.practice-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.practice-link {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 20px;
  background: #004053;
  color: white;
  text-decoration: none;
  border-radius: 10px;
  transition: all 0.3s ease;
}

.practice-link:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
  background: #008000;
}

.practice-link i {
  font-size: 1.5rem;
}

.practice-link-content h4 {
  font-weight: 600;
  margin-bottom: 5px;
  color: #ff0000;
}

.practice-link-content p {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    padding: 0 15px;
  }

  .header-left h1 {
    font-size: 1.2rem;
  }

  .welcome-text {
    display: none;
  }

  .hero-section h2 {
    font-size: 2rem;
  }

  .hero-section p {
    font-size: 1rem;
  }

  .progress-overview {
    flex-direction: row; /* Changed from column to row */
    gap: 15px; /* Reduced gap for mobile */
    margin-top: 30px;
    justify-content: space-between; /* Distribute items evenly */
  }

  .progress-item {
    text-align: center;
    flex: 1; /* Make items take equal width */
  }

  .progress-number {
    font-size: 1.5rem; /* Slightly smaller for mobile */
  }

  .progress-label {
    font-size: 0.8rem; /* Smaller label text */
  }

  .weeks-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .week-card {
    padding: 20px;
  }

  .main-content,
  .week-content {
    padding: 20px 15px;
  }

  .section {
    padding: 20px;
  }

  .topics-list {
    grid-template-columns: 1fr;
  }

  .practice-links {
    grid-template-columns: 1fr;
  }

  .task-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .task-checkbox {
    margin-top: 0;
  }
}

@media (max-width: 480px) {
  .login-card {
    padding: 30px 20px;
  }

  .hero-section h2 {
    font-size: 1.8rem;
  }

  .week-header h2 {
    font-size: 1.6rem;
  }

  .section h3 {
    font-size: 1.1rem;
  }

  .progress-overview {
    gap: 10px; /* Even smaller gap for very small screens */
  }

  .progress-number {
    font-size: 1.3rem; /* Further reduce for very small screens */
  }

  .progress-label {
    font-size: 0.75rem;
    line-height: 1.2;
  }

  /* Make header more sidebar-like on mobile */
  .app-header {
    background: rgba(20, 20, 20, 0.98);
    border-bottom: 2px solid #667eea;
  }

  .header-content {
    padding: 15px 10px;
  }

  .header-left {
    gap: 10px;
  }

  .header-left i {
    font-size: 1.3rem;
  }

  .header-left h1 {
    font-size: 1.1rem;
  }

  .logout-btn,
  .back-btn {
    padding: 8px 12px;
    font-size: 14px;
  }

  .logout-btn i,
  .back-btn i {
    font-size: 16px;
  }
}

/* Loading Animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #fff;
  animation: spin 1s ease-in-out infinite;
}

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

/* Smooth Transitions */
.view {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.view.active {
  opacity: 1;
}