:root {
    --bg-page: #F8FAFC;
    --bg-hero-start: #F0FDFA;
    --bg-hero-end: #F1F5F9;
    --bg-card: #FFFFFF;
    --primary-accent: #0D9488;
    --primary-accent-light: #CCFBF1;
    --text-dark: #1E293B;
    --text-medium: #475569;
    --text-light: #94A3B8;
    --border-color: #E2E8F0;
    --error-bg: #FEF2F2;
    --error-text: #DC2626;
    --warning-bg: #FFFBEB;
    --warning-text: #B45309;
    --success-bg: #ECFDF5;
    --success-text: #065F46;
    --results-bg: #F8FAFC;
    --positive-color: #065F46;
    --negative-color: #DC2626;
  }
  
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-page);
    color: var(--text-medium);
    line-height: 1.6;
    overflow-x: hidden;
  }
  
  h1, h2, h3, h4 {
    color: var(--text-dark);
    line-height: 1.2;
    font-weight: 600;
  }
  
  h1 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 1rem;
  }
  
  h2.section-title {
    font-size: clamp(1.25rem, 4vw, 1.5rem);
    margin-bottom: 1.25rem;
  }
  
  /* Navigation */
  .navbar {
    background-color: var(--bg-card);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
  }
  
  .nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem clamp(0.75rem, 3vw, 1rem);
  }
  
  .nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .nav-logo {
    height: 32px;
    width: auto;
  }
  
  .brand-name {
    font-weight: 700;
    color: var(--text-dark);
    font-size: 1.1rem;
  }
  
  .brand-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  
  .brand-link:hover {
    text-decoration: none;
    color: inherit;
  }
  
  /* Navigation Toggle */
  .nav-toggle {
    display: flex;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 0.25rem;
    z-index: 1002;
  }
  
  .nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-dark);
    transition: all 0.3s ease;
    transform-origin: center;
  }
  
  /* Navigation Slider */
  .nav-slider {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background-color: var(--bg-card);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease-in-out;
    z-index: 1001;
    overflow-y: auto;
  }
  
  .nav-slider.active {
    right: 0;
  }
  
  .slider-content {
    padding: 1.5rem;
    height: 100%;
  }
  
  .slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
  }
  
  .slider-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--text-dark);
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1002;
  }
  
  .slider-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .slider-link {
    display: block;
    padding: 1rem;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    border-radius: 0.5rem;
    transition: all 0.2s;
  }
  
  .slider-link:hover, .slider-link.active {
    background-color: var(--primary-accent-light);
    color: var(--primary-accent);
  }
  
  /* Overlay when slider is open */
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }
  
  .nav-overlay.active {
    opacity: 1;
    visibility: visible;
  }
  
  /* Hero Section */
  .hero-section {
    background: linear-gradient(135deg, var(--bg-hero-start) 0%, var(--bg-hero-end) 100%);
    padding: clamp(3rem, 8vw, 5rem) clamp(1rem, 4vw, 2rem);
    text-align: center;
    position: relative;
    overflow: hidden;
    margin-bottom: 2rem;
  }
  
  .hero-content {
    max-width: 800px;
    margin: 0 auto;
  }
  
  .hero-text p {
    font-size: clamp(1rem, 3vw, 1.25rem);
    margin-bottom: 2.5rem;
    color: var(--text-medium);
    line-height: 1.7;
  }
  
  .feature-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 15px 0;
    justify-content: center;
  }
  
  .feature-badge {
    background-color: var(--primary-accent-light);
    color: var(--primary-accent);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  
  /* Cards */
  .card {
    background-color: var(--bg-card);
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    padding: clamp(1.5rem, 4vw, 2rem);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  }
  
  .main-card {
    margin-top: 0;
    position: relative;
    z-index: 10;
  }
  
  /* Calculator Container */
  .calculator-container {
    padding: 0 clamp(1rem, 4vw, 2rem);
    margin-bottom: 3rem;
  }
  
  /* Centered Form Container */
  .centered-form-container {
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
  }
  
  /* Main Tabs */
  .main-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
    justify-content: center;
  }
  
  .main-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    border: 2px solid var(--primary-accent);
    border-radius: 0.75rem;
    background-color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    color: var(--primary-accent);
    box-shadow: 0 2px 8px rgba(13, 148, 136, 0.1);
    min-width: 140px;
    justify-content: center;
  }
  
  .main-tab:hover {
    background-color: var(--primary-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.15);
  }
  
  .main-tab.active {
    background-color: var(--primary-accent);
    border-color: var(--primary-accent);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.2);
  }
  
  .main-tab i {
    font-size: 1.1rem;
  }
  
  /* Tab Content */
  .tab-content {
    display: none;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
  }
  
  .tab-content.active {
    display: flex;
    animation: fadeIn 0.3s ease;
  }
  
  @keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }
  
  /* Form Elements */
  .form-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    position: relative;
  }
  
  .input-group label {
    font-weight: 500;
    color: var(--text-dark);
  }
  
  .input-group input, .input-group select {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: all 0.2s;
    background-color: white;
  }
  
  .input-group input:focus, .input-group select:focus {
    outline: none;
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
  }
  
  .input-help {
    font-size: 0.875rem;
    color: var(--text-light);
  }
  
  /* Buttons */
  .calculate-button {
    background-color: var(--primary-accent);
    color: white;
    border: none;
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    width: 100%;
    margin-top: 0.5rem;
  }
  
  .calculate-button:hover {
    background-color: #0f766e;
    transform: translateY(-2px);
  }
  
  .calculate-button:disabled {
    background-color: var(--text-light);
    cursor: not-allowed;
    transform: none;
  }
  
  .cta-button {
    display: inline-block;
    background-color: var(--primary-accent);
    color: white;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    margin-top: 1rem;
  }
  
  .cta-button:hover {
    background-color: #0f766e;
    transform: translateY(-2px);
  }
  
  .action-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background-color: white;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
    text-align: center;
  }
  
  .action-button:hover {
    border-color: var(--primary-accent);
    color: var(--primary-accent);
  }
  
  .action-button.secondary {
    background-color: var(--bg-page);
  }
  
  .action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
  }
  
  /* Method Selector */
  .method-selector {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 1.5rem 0;
  }
  
  .method-option {
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem 1rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: white;
  }
  
  .method-option:hover {
    border-color: var(--primary-accent);
  }
  
  .method-option.active {
    border-color: var(--primary-accent);
    background-color: var(--primary-accent-light);
  }
  
  .method-option i {
    font-size: 2rem;
    color: var(--primary-accent);
    margin-bottom: 0.5rem;
  }
  
  .method-option span {
    display: block;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
  }
  
  .method-option small {
    color: var(--text-light);
    font-size: 0.75rem;
  }
  
  /* Calculation Methods */
  .calculation-method {
    display: none;
  }
  
  .calculation-method.active {
    display: block;
    animation: fadeIn 0.3s ease;
  }
  
  /* Results Grid */
  .results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
  }
  
  .result-card {
    background: var(--bg-page);
    border-radius: 1rem;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border: 1px solid var(--border-color);
  }
  
  .result-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  
  .result-icon i {
    font-size: 1.5rem;
    color: var(--primary-accent);
  }
  
  .result-content h4 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
  }
  
  .result-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-accent);
    margin-bottom: 0.25rem;
  }
  
  .result-content small {
    color: var(--text-light);
    font-size: 0.875rem;
  }
  
  /* Progress Visualization */
  .progress-visualization {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--bg-page);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
  }
  
  .progress-bar {
    width: 100%;
    height: 12px;
    background: var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    margin: 1rem 0;
  }
  
  .progress-fill {
    height: 100%;
    background: var(--primary-accent);
    transition: width 0.5s ease;
    width: 0%;
  }
  
  .progress-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-light);
  }
  
  #current-progress {
    font-weight: 600;
    color: var(--primary-accent);
  }
  
  /* Milestones Timeline */
  .milestones-timeline {
    margin-top: 2rem;
  }
  
  .timeline {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .milestone {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-page);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
  }
  
  .milestone-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  
  .milestone-icon i {
    font-size: 1.25rem;
    color: var(--primary-accent);
  }
  
  .milestone-content h5 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
  }
  
  .milestone-content p {
    font-weight: 600;
    color: var(--primary-accent);
    margin-bottom: 0.25rem;
  }
  
  .milestone-content small {
    color: var(--text-light);
    font-size: 0.875rem;
  }
  
  /* Week Selector */
  .week-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1.5rem 0;
  }
  
  .week-selector label {
    font-weight: 500;
    color: var(--text-dark);
  }
  
  .week-selector select {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    background-color: white;
    min-width: 150px;
  }
  
  /* Week Details */
  .week-details {
    margin-top: 1.5rem;
  }
  
  .week-header {
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
  }
  
  .week-badges {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
  }
  
  .week-badge {
    background: var(--primary-accent-light);
    color: var(--primary-accent);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
  }
  
  .week-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
  
  .week-column {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .info-card {
    background: var(--bg-page);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    overflow: hidden;
  }
  
  .info-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1.25rem;
    background: var(--primary-accent-light);
    border-bottom: 1px solid var(--border-color);
  }
  
  .info-card-header i {
    font-size: 1.25rem;
    color: var(--primary-accent);
  }
  
  .info-card-header h5 {
    color: var(--text-dark);
    margin: 0;
  }
  
  .info-card-content {
    padding: 1.25rem;
  }
  
  .info-card-content p {
    margin: 0;
    line-height: 1.6;
  }
  
  /* Resources Grid */
  .resources-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
  }
  
  .resource-card {
    background: var(--bg-page);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    transition: all 0.3s ease;
  }
  
  .resource-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-accent-light);
  }
  
  .resource-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  
  .resource-icon i {
    font-size: 1.25rem;
    color: var(--primary-accent);
  }
  
  .resource-content h4 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
  }
  
  .resource-content p {
    margin-bottom: 1rem;
    color: var(--text-medium);
    line-height: 1.5;
  }
  
  .resource-link {
    color: var(--primary-accent);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .resource-link:hover {
    text-decoration: underline;
  }
  
  /* Feature Cards */
  .calculator-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 30px 0;
  }
  
  .feature-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 20px;
    border-left: 4px solid var(--primary-accent);
  }
  
  .feature-card h4 {
    margin-top: 0;
    color: #2c3e50;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .feature-card i {
    color: var(--primary-accent);
  }
  
  /* Notices */
  .privacy-notice, .disclaimer-box {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-top: 1rem;
  }
  
  .privacy-notice {
    background-color: var(--success-bg);
    border-left: 4px solid var(--success-text);
  }
  
  .disclaimer-box {
    background-color: var(--warning-bg);
    border-left: 4px solid var(--warning-text);
  }
  
  .privacy-title, .disclaimer-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
  }
  
  .privacy-text, .disclaimer-text {
    font-size: 0.875rem;
    color: var(--text-medium);
  }
  
  /* Animations */
  .animate-on-load {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
  }
  
  @keyframes fadeInUp {
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* Message Container */
  .message-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 10000;
    max-width: 400px;
    width: 100%;
  }
  
  .message-box {
    padding: 1rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    animation: slideInRight 0.3s ease;
    border-left: 4px solid;
  }
  
  @keyframes slideInRight {
    from {
      opacity: 0;
      transform: translateX(100%);
    }
    to {
      opacity: 1;
      transform: translateX(0);
    }
  }
  
  .message-box i {
    font-size: 1.25rem;
    margin-top: 0.125rem;
  }
  
  .message-content {
    flex: 1;
  }
  
  .message-content strong {
    display: block;
    margin-bottom: 0.25rem;
    font-weight: 600;
  }
  
  .error-box {
    background-color: var(--error-bg);
    color: var(--error-text);
    border-left-color: var(--error-text);
  }
  
  .success-box {
    background-color: var(--success-bg);
    color: var(--success-text);
    border-left-color: var(--success-text);
  }
  
  .warning-box {
    background-color: var(--warning-bg);
    color: var(--warning-text);
    border-left-color: var(--warning-text);
  }
  
  .info-box {
    background-color: var(--primary-accent-light);
    color: var(--primary-accent);
    border-left-color: var(--primary-accent);
  }
  
  /* How-To Section */
  .how-to-section {
    padding: 4rem 1rem;
    background: linear-gradient(135deg, var(--bg-hero-start) 0%, var(--bg-hero-end) 100%);
  }
  
  .how-to-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 2rem;
  }
  
  @media (min-width: 768px) {
    .how-to-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (min-width: 1024px) {
    .how-to-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }
  
  .how-to-card {
    background: var(--bg-card);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
  }
  
  .how-to-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  }
  
  .how-to-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
  }
  
  .how-to-icon i {
    font-size: 1.5rem;
    color: var(--primary-accent);
  }
  
  .how-to-card h3 {
    color: var(--text-dark);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.4;
  }
  
  .how-to-card p {
    color: var(--text-medium);
    line-height: 1.6;
    font-size: 0.95rem;
  }
  
  .section-subtitle {
    text-align: center;
    color: var(--text-medium);
    margin-bottom: 2rem;
    font-size: 1.1rem;
  }
  
  /* FAQ Section */
  .content-section {
    padding: 3rem 1rem;
  }
  
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
  }
  
  .faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
  }
  
  @media (min-width: 768px) {
    .faq-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  .faq-card {
    background: var(--bg-card);
    border-radius: 1rem;
    padding: 2.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
  }
  
  .faq-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-accent-light);
  }
  
  .faq-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-accent-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
  }
  
  .faq-icon i {
    font-size: 1.5rem;
    color: var(--primary-accent);
  }
  
  .faq-card h3 {
    color: var(--text-dark);
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    line-height: 1.4;
  }
  
  .faq-card p {
    color: var(--text-medium);
    line-height: 1.7;
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
  }
  
  .faq-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
  }
  
  .faq-category {
    background: var(--primary-accent-light);
    color: var(--primary-accent);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
  }
  
  .faq-read-time {
    color: var(--text-light);
    font-size: 0.875rem;
    font-weight: 500;
  }
  
  /* Simple FAQ Grid */
  .simple-faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
  }
  
  @media (min-width: 768px) {
    .simple-faq-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (min-width: 1024px) {
    .simple-faq-grid {
      grid-template-columns: repeat(3, 1fr);
    }
  }
  
  .simple-faq-item {
    background: var(--bg-card);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
  }
  
  .simple-faq-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-accent-light);
  }
  
  .simple-faq-item h3 {
    color: var(--text-dark);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    line-height: 1.4;
  }
  
  .simple-faq-item p {
    color: var(--text-medium);
    line-height: 1.6;
    font-size: 1rem;
    margin: 0;
  }
  
  /* Footer */
  .footer {
    background-color: var(--bg-card);
    padding: 2rem 1rem;
    margin-top: 4rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
  }
  
  .footer-content {
    max-width: 800px;
    margin: 0 auto;
  }
  
  .footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: 1rem 0;
  }
  
  .footer-links a {
    color: var(--text-medium);
    text-decoration: none;
    transition: color 0.2s;
  }
  
  .footer-links a:hover {
    color: var(--primary-accent);
  }
  
  .disclaimer {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }
  
  /* Responsive Adjustments */
  @media (max-width: 767px) {
    .main-tabs {
      flex-direction: column;
      align-items: center;
    }
    
    .main-tab {
      min-width: auto;
      width: 100%;
      max-width: 280px;
    }
    
    .action-buttons {
      flex-direction: column;
    }
    
    .method-selector {
      grid-template-columns: 1fr;
    }
    
    .results-grid {
      grid-template-columns: 1fr;
    }
    
    .week-content {
      grid-template-columns: 1fr;
    }
    
    .resources-grid {
      grid-template-columns: 1fr;
    }
    
    .hero-section {
      padding: clamp(2rem, 6vw, 3rem) clamp(1rem, 4vw, 1.5rem);
      margin-bottom: 1.5rem;
    }
    
    .feature-badges {
      justify-content: flex-start;
    }
    
    .feature-badge {
      font-size: 0.8rem;
      padding: 6px 12px;
    }
    
    .week-selector {
      flex-direction: column;
      align-items: flex-start;
    }
  }
  
  @media (max-width: 480px) {
    .main-tab {
      padding: 0.75rem 1rem;
      font-size: 0.8rem;
    }
    
    .main-tab i {
      font-size: 1rem;
    }
    
    .how-to-card {
      padding: 1.5rem;
    }
    
    .hero-text p {
      margin-bottom: 2rem;
    }
    
    .faq-card {
      padding: 1.5rem;
    }
    
    .faq-icon {
      width: 45px;
      height: 45px;
      margin-bottom: 1rem;
    }
    
    .faq-icon i {
      font-size: 1.1rem;
    }
    
    .faq-card h3 {
      font-size: 1.15rem;
      margin-bottom: 1rem;
    }
    
    .faq-card p {
      font-size: 1rem;
      line-height: 1.6;
    }
    
    .simple-faq-item {
      padding: 1.25rem;
    }
    
    .section-title {
      font-size: 1.75rem;
    }
    
    .section-subtitle {
      font-size: 1.1rem;
    }
    
    .resource-card {
      flex-direction: column;
      text-align: center;
    }
    
    .milestone {
      flex-direction: column;
      text-align: center;
    }
  }
  
  /* Loading States */
  .loading {
    position: relative;
    pointer-events: none;
  }
  
  .loading:after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #ffffff;
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
  /* Responsive Messages */
  @media (max-width: 768px) {
    .message-container {
      top: 70px;
      right: 10px;
      left: 10px;
      max-width: none;
    }
    
    .message-box {
      padding: 0.75rem;
    }
  }
  /* Enhanced Overview Section */
.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.overview-card {
  background: var(--bg-card);
  border-radius: 1rem;
  padding: 2.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.overview-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  border-color: var(--primary-accent-light);
}

.overview-icon {
  width: 70px;
  height: 70px;
  background: var(--primary-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.overview-icon i {
  font-size: 1.75rem;
  color: var(--primary-accent);
}

.overview-card h3 {
  color: var(--text-dark);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.overview-card p {
  color: var(--text-medium);
  line-height: 1.7;
  font-size: 1.05rem;
  margin: 0;
}

/* Use Cases Section */
.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.use-case-card {
  background: var(--bg-card);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.use-case-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.use-case-icon {
  width: 60px;
  height: 60px;
  background: var(--primary-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.use-case-icon i {
  font-size: 1.5rem;
  color: var(--primary-accent);
}

.use-case-card h3 {
  color: var(--text-dark);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.problem-solution {
  margin-bottom: 1.5rem;
}

.problem-solution h4 {
  color: var(--text-dark);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.problem, .solution {
  margin-bottom: 1rem;
}

.problem h4 {
  color: var(--negative-color);
}

.solution h4 {
  color: var(--positive-color);
}

.pro-tip {
  background: var(--warning-bg);
  border-left: 4px solid var(--warning-text);
  padding: 1rem;
  border-radius: 0.5rem;
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.benefits {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.benefit-tag {
  background: var(--primary-accent-light);
  color: var(--primary-accent);
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Tips & Best Practices */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.tip-card {
  background: var(--bg-card);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  position: relative;
}

.tip-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.tip-number {
  position: absolute;
  top: -15px;
  left: -15px;
  width: 40px;
  height: 40px;
  background: var(--primary-accent);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}

.tip-card h3 {
  color: var(--text-dark);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.tip-card p {
  color: var(--text-medium);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.tip-meta {
  display: flex;
  gap: 1rem;
}

.tip-category, .tip-difficulty {
  background: var(--bg-page);
  padding: 0.5rem 1rem;
  border-radius: 2rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.tip-category {
  color: var(--primary-accent);
  border: 1px solid var(--primary-accent-light);
}

.tip-difficulty {
  color: var(--text-light);
  border: 1px solid var(--border-color);
}

/* Quick Tips in How-To */
.quick-tip {
  background: var(--success-bg);
  border-left: 4px solid var(--success-text);
  padding: 1rem;
  border-radius: 0.5rem;
  margin: 1rem 0;
  font-size: 0.95rem;
}

.troubleshooting {
  background: var(--error-bg);
  border-left: 4px solid var(--error-text);
  padding: 1rem;
  border-radius: 0.5rem;
  margin: 1rem 0;
  font-size: 0.95rem;
}

/* Advantages Section */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.advantage-card {
  background: var(--bg-card);
  border-radius: 1rem;
  padding: 2.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  text-align: center;
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.advantage-icon {
  width: 80px;
  height: 80px;
  background: var(--primary-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.advantage-icon i {
  font-size: 2rem;
  color: var(--primary-accent);
}

.advantage-card h3 {
  color: var(--text-dark);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.advantage-card p {
  color: var(--text-medium);
  line-height: 1.6;
  margin-bottom: 2rem;
}

.advantage-metrics {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.metric {
  text-align: center;
}

.metric-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-accent);
  margin-bottom: 0.25rem;
}

.metric-label {
  font-size: 0.875rem;
  color: var(--text-light);
}

/* Success Stories */
.stories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.story-card {
  background: var(--bg-card);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.story-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.story-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.story-avatar {
  width: 60px;
  height: 60px;
  background: var(--primary-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.story-avatar i {
  font-size: 1.5rem;
  color: var(--primary-accent);
}

.story-meta h4 {
  color: var(--text-dark);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.story-meta span {
  color: var(--text-light);
  font-size: 0.9rem;
}

.story-content p {
  color: var(--text-medium);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.story-outcome {
  display: flex;
  gap: 1.5rem;
}

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

.outcome-value {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-accent);
  margin-bottom: 0.25rem;
}

.outcome-label {
  font-size: 0.875rem;
  color: var(--text-light);
}

/* Technical Deep Dive */
.technical-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.technical-card {
  background: var(--bg-card);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.technical-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.technical-card h3 {
  color: var(--text-dark);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.technical-card h3 i {
  color: var(--primary-accent);
}

.technical-card p {
  color: var(--text-medium);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.technical-card p:last-child {
  margin-bottom: 0;
}

/* Responsive adjustments for new sections */
@media (max-width: 768px) {
  .overview-grid,
  .use-cases-grid,
  .tips-grid,
  .advantages-grid,
  .stories-grid,
  .technical-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .overview-card,
  .use-case-card,
  .tip-card,
  .advantage-card,
  .story-card,
  .technical-card {
    padding: 1.5rem;
  }
  
  .advantage-metrics {
    flex-direction: column;
    gap: 1rem;
  }
  
  .story-outcome {
    flex-direction: column;
    gap: 1rem;
  }
  
  .tip-number {
    top: -10px;
    left: -10px;
    width: 35px;
    height: 35px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .benefits {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .tip-meta {
    flex-direction: column;
    gap: 0.5rem;
  }
}