/* Genel Sıfırlama ve Temel Ayarlar */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    background: #fff;
    color: #222;
    font-family: 'Poppins', Arial, Helvetica, sans-serif;
    min-height: 100vh;
    line-height: 1.6;
    padding-top: 70px; /* Add padding for fixed navbar */
  }
  
  body.menu-open {
    overflow: hidden !important;
    padding-right: 17px; /* Compensate for scrollbar width */
  }
  
  /* Görünürlük için önemli kurallar */
  .hero-content, .about-content, .services-grid, .contact-container {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
  }
  
  /* Navbar */
  header {
    width: 100%;
    background: #fff;
    border-bottom: 1px solid #eee;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
  }
  
  nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 70px;
    background-color: white;
    padding: 0 2rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  }
  
  .logo-container {
    display: flex;
    align-items: center;
  }
  
  .logo-container a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: #333;
  }
  
  .logo-img {
    height: 40px;
    margin-right: 10px;
  }
  
  .logo-text {
    font-size: 18px;
    font-weight: 600;
  }
  
  .nav-links {
    display: flex;
    gap: 1rem;
    list-style: none;
  }
  
  .nav-links a {
    color: #333;
    text-decoration: none;
    letter-spacing: 1px;
    font-weight: 500;
    font-size: 14px;
    padding: 10px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
  }
  
  .nav-links a:hover {
    background-color: #f5f5f5;
  }
  
  .nav-links a.active {
    background-color: #007bff;
    color: white;
  }
  
  /* Mobil menü için temel yapı */
  .mobile-menu-btn {
    display: none;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0.5rem;
    font-size: 1.5rem;
    color: #333;
    transition: color 0.3s ease;
  }
  
  .mobile-menu-btn:hover {
    color: #007bff;
  }
  
  @media screen and (max-width: 768px) {
    nav {
        padding: 0 1rem;
    }

    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        padding: 1rem;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        flex-direction: column;
        gap: 0.5rem;
        opacity: 0;
        transform: translateY(-10px);
        transition: all 0.3s ease;
    }
    ul.nav-links.show {
        display: flex !important;
        opacity: 1;
        transform: translateY(0);
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 0.8rem 1rem;
        width: 100%;
        text-align: center;
    }
  }
  
  /* Modern Tasarım Güncellemeleri */
  :root {
    --primary-color: #0070f3;
    --secondary-color: #0051a8;
    --text-color: #222;
    --light-gray: #f5f5f5;
    --border-radius: 12px;
    --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
  }
  
  /* Hero Section */
  .hero {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 8rem 2rem 4rem 2rem;
    position: relative;
    overflow: visible;
    clip-path: polygon(0 0, 100% 0, 100% 85%, 0 100%);
    padding-top: 20px;
    padding-bottom: 60px;
  }
  
  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 112, 243, 0.05) 0%, rgba(0, 81, 168, 0.05) 100%);
    z-index: 1;
  }
  
  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
  }
  
  .hero-content h1 {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
  }
  
  .hero-content p {
    font-size: 1.25rem;
    color: #444;
    margin-bottom: 2.5rem;
    line-height: 1.6;
  }
  
  .hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 2rem;
    margin-bottom: 2rem;
  }
  
  .cta-button {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 50px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
  }
  
  .cta-button.primary {
    background: linear-gradient(135deg, #25d366, #128c7e);
    color: white;
    border: none;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.18);
    text-decoration: none;
  }
  
  .cta-button.primary:hover {
    background: linear-gradient(135deg, #128c7e, #25d366);
  }
  
  .cta-button.secondary {
    background: linear-gradient(135deg, #25d366, #128c7e);
    color: white;
    border: none;
    text-decoration: none;
  }
  
  .cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 112, 243, 0.4);
  }
  
  /* About Section */
  .about {
    background: #fff;
    padding: 3rem 2rem;
    padding-top: 20px;
    padding-bottom: 20px;
  }
  
  .about-content {
    display: flex !important;
    flex-direction: row !important;
    align-items: stretch !important;
    justify-content: flex-start !important;
    gap: 2rem !important;
    max-width: 1200px;
    margin: 0 auto;
  }
  
  .about-text {
    flex: 1 1 0 !important;
    min-width: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    justify-content: center !important;
  }
  
  .about-text h2 {
    font-size: 2.2rem;
    margin-bottom: 1.2rem;
    color: var(--text-color);
  }
  
  .about-text p {
    font-size: 1.1rem;
    color: #444;
    margin-bottom: 1.2rem;
    line-height: 1.6;
  }
  
  .about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
  }
  
  .feature {
    background: white;
    border: 1px solid rgba(0, 112, 243, 0.1);
    padding: 1.2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
  }
  
  .feature:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
  }
  
  .feature i {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
  }
  
  .feature span {
    display: block;
    font-weight: 500;
    color: var(--text-color);
  }
  
  .about-image {
    flex: 0 0 320px;
    max-width: 320px;
    height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.07);
  }
  
  /* Levels Section */
  .levels {
    padding: 5rem 2rem;
    background: var(--light-gray);
    padding-top: 20px;
    padding-bottom: 20px;
  }
  
  .levels h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
  }
  
  .levels-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    justify-content: center;
    align-items: stretch;
  }
  
  .level-cards {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
    margin: 2rem 0;
  }
  
  .level-card {
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 2px 16px rgba(0,0,0,0.06);
    padding: 2.2rem 2rem 1.5rem 2rem;
    max-width: 370px;
    width: 100%;
    text-align: center;
    border: 1.5px solid #f0f0f0;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: box-shadow 0.2s, border 0.2s, transform 0.2s;
  }
  
  .level-card:hover {
    box-shadow: 0 6px 32px rgba(0,112,243,0.10);
    border: 1.5px solid var(--primary-color);
    transform: translateY(-4px) scale(1.03);
  }
  
  .level-icon {
    font-size: 2.1rem;
    color: var(--primary-color);
    margin-bottom: 0.7rem;
  }
  
  .level-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
  }
  
  .level-card p {
    color: #444;
    font-size: 1.05rem;
    margin-bottom: 1.1rem;
  }
  
  .level-progress {
    margin-bottom: 1.1rem;
  }
  
  .level-progress span {
    font-size: 1rem;
    color: #555;
    display: block;
    margin-bottom: 0.3rem;
  }
  
  .progress-bar {
    width: 100%;
    height: 7px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
    margin: 0 auto 0.5rem auto;
  }
  
  .progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    transition: width 0.3s;
  }
  
  .select-level-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 0.9rem 2.2rem;
    font-size: 1.1rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0,112,243,0.08);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    margin-top: 0.5rem;
  }
  
  .select-level-btn:hover, .select-level-btn:focus {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-2px) scale(1.04);
    box-shadow: 0 4px 20px rgba(0,112,243,0.18);
  }
  
  .level-stars {
    color: #ffd700;
    margin-bottom: 1rem;
  }
  
  .level-features {
    list-style: none;
    margin: 1.5rem 0;
    padding: 0;
  }
  
  .level-features li {
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  
  .level-features i {
    color: var(--primary-color);
  }
  
  .level-button {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: var(--primary-color);
    color: #fff;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
  }
  
  .level-button:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
  }
  
  .bottom-cards {
    display: flex;
    gap: 2rem;
    width: 100%;
    justify-content: center;
  }
  
  /* Contact Section */
  .contact {
    padding: 5rem 2rem;
    background: #fff;
    padding-top: 20px;
    padding-bottom: 20px;
  }
  
  .social-links {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
  }
  
  .social-item {
    background: white;
    border: 1px solid rgba(0, 112, 243, 0.1);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
  }
  
  .social-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
  }
  
  .social-item a {
    text-decoration: none;
    color: inherit;
    display: block;
  }
  
  .social-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    transition: transform 0.3s ease;
  }
  
  .social-item:hover .social-icon {
    transform: scale(1.1);
  }
  
  .social-name {
    display: block;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.5rem;
  }
  
  .social-username {
    color: #666;
    font-size: 0.9rem;
  }
  
  /* Responsive Design */
  @media (max-width: 900px) {
    .about-content {
      flex-direction: column !important;
      align-items: center !important;
    }
    .about-image {
      width: 100%;
      max-width: 100%;
      height: 200px;
    }
    .about-features {
      grid-template-columns: 1fr;
    }
    .levels-grid, .bottom-cards {
      flex-direction: column;
      align-items: center;
      gap: 1.5rem;
    }
    .level-card {
      max-width: 100%;
      min-width: 0;
    }
  }
  
  @media (max-width: 576px) {
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        flex: 0 0 250px;
        height: 250px;
    }
    .hero-content h1 {
      font-size: 2rem;
      padding: 0 0.5rem;
      word-break: break-word;
      line-height: 1.15;
    }
  }
  
  @media (max-width: 700px) {
    .level-cards {
        gap: 1.2rem;
    }
    .level-card {
        padding: 1.2rem 0.7rem 1rem 0.7rem;
        max-width: 98vw;
    }
    .level-buttons {
      flex-direction: column;
      gap: 1rem;
      align-items: stretch;
    }
    .level-select-btn {
      width: 100%;
      font-size: 1.1rem;
      padding: 1rem 0.5rem;
      justify-content: center;
    }
  }
  
  /* Footer */
  footer {
    background: #f0f0f0;
    color: #444;
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 2rem;
    font-size: 1rem;
    border-top: 1px solid #eee;
  }
  
  /* Animasyonlar */
  @keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
  }
  
  @keyframes navLinkFade {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
  }

  .project-slider {
    width: 100%;
    height: 200px;
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
  }

  .project-slider .swiper-slide {
    width: 100%;
    height: 100%;
  }

  .project-slider .swiper-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .project-slider .swiper-button-next,
  .project-slider .swiper-button-prev {
    color: #fff;
    background: rgba(0, 0, 0, 0.3);
    width: 30px;
    height: 30px;
    border-radius: 50%;
  }

  .project-slider .swiper-button-next:after,
  .project-slider .swiper-button-prev:after {
    font-size: 16px;
  }

  .project-slider .swiper-pagination-bullet {
    background: #fff;
    opacity: 0.5;
  }

  .project-slider .swiper-pagination-bullet-active {
    opacity: 1;
  }

  .project-content {
    flex: 1;
    display: flex;
    flex-direction: column;
  }

  .project-content h3 {
    margin: 15px 0;
    font-size: 1.2rem;
  }

  .project-content p {
    margin-bottom: 15px;
    flex: 1;
  }

  .project-features {
    margin-bottom: 15px;
    padding-left: 20px;
  }

  /* Test Page Modern Tasarım */
  .test-page {
    max-width: 600px;
    margin: 3rem auto 2rem auto;
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2.5rem 2rem;
  }

  .test-intro h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    text-align: center;
  }

  .test-intro p {
    color: #444;
    font-size: 1.1rem;
    margin-bottom: 2rem;
    text-align: center;
  }

  .progress-container {
    margin: 2rem 0 1.5rem 0;
  }
  .progress-steps {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.7rem;
  }
  .step {
    background: #f0f0f0;
    color: #888;
    border-radius: 50px;
    padding: 0.5rem 1.2rem;
    font-weight: 600;
    font-size: 1rem;
    transition: background 0.2s, color 0.2s;
  }
  .step.active {
    background: var(--primary-color);
    color: #fff;
  }
  .progress-bar {
    width: 100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
  }
  .progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px;
    transition: width 0.3s;
  }

  .question-container, .result-container {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem 1.5rem;
    margin-top: 2rem;
  }
  .level-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.2rem;
  }
  .level-info h2 {
    font-size: 1.3rem;
    color: var(--primary-color);
    font-weight: 600;
  }
  .question-progress {
    font-size: 1rem;
    color: #555;
  }
  .question-box {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    padding: 1.5rem 1rem;
    margin-bottom: 1.5rem;
  }
  .question-text {
    font-size: 1.15rem;
    color: #222;
    margin-bottom: 1.2rem;
    font-weight: 500;
  }
  .answer-options {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
  }
  .answer-options button {
    background: #f0f0f0;
    border: none;
    border-radius: 8px;
    padding: 0.8rem 1.2rem;
    font-size: 1rem;
    color: #222;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    text-align: left;
  }
  .answer-options button.selected,
  .answer-options button:hover {
    background: var(--primary-color);
    color: #fff;
  }
  .test-controls {
    display: flex;
    justify-content: flex-end;
    margin-top: 1.2rem;
  }
  .test-button {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 0.9rem 2.2rem;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    box-shadow: 0 2px 8px rgba(0,112,243,0.08);
  }
  .test-button.secondary {
    background: #fff;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
  }
  .test-button:hover {
    transform: translateY(-2px);
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
  }
  .result-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
  }
  .result-score {
    background: #fff;
    border-radius: 50%;
    width: 90px;
    height: 90px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(0,112,243,0.08);
    margin-bottom: 0.5rem;
  }
  .result-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
  }
  @media (max-width: 700px) {
    .test-page {
        padding: 1.2rem 0.5rem;
    }
    .question-container, .result-container {
        padding: 1.2rem 0.5rem;
    }
  }

  .answer-option.correct {
    background: #4CAF50 !important;
    color: #fff !important;
    border: none;
    box-shadow: 0 2px 8px rgba(76,175,80,0.08);
    transition: background 0.2s, color 0.2s;
  }
  .answer-option.wrong {
    background: #f44336 !important;
    color: #fff !important;
    border: none;
    box-shadow: 0 2px 8px rgba(244,67,54,0.08);
    transition: background 0.2s, color 0.2s;
  }

  /* Pratik Yap Modern Tasarım */
  .practice-page {
    max-width: 800px;
    margin: 3rem auto 2rem auto;
    background: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2.5rem 2rem;
  }
  .practice-intro h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    text-align: center;
  }
  .practice-intro p {
    color: #444;
    font-size: 1.1rem;
    margin-bottom: 2rem;
    text-align: center;
  }
  .practice-rules {
    background: #f8f9fa;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    padding: 1.2rem 1rem;
    margin-bottom: 2rem;
  }
  .practice-rules h3 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 0.7rem;
  }
  .practice-rules ul {
    padding-left: 20px;
    color: #333;
    font-size: 1rem;
  }
  .practice-container {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
  }
  .practice-level-container {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem 1.5rem;
  }
  .practice-level-container h2 {
    font-size: 1.3rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.7rem;
  }
  .practice-level-container p {
    color: #555;
    margin-bottom: 1.2rem;
  }
  .sentence-list {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
  }
  .sentence-item {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    padding: 1.2rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
  }
  .sentence-item .sentence-turkish {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.1rem;
  }
  .sentence-item input[type="text"] {
    padding: 1.1rem 1.3rem;
    border-radius: 10px;
    border: 1.5px solid #e0e0e0;
    font-size: 1.15rem;
    width: 100%;
    margin-bottom: 0.7rem;
    transition: border 0.2s;
    box-sizing: border-box;
  }
  .sentence-item input[type="text"]:focus {
    border: 1.5px solid var(--primary-color);
    outline: none;
  }
  .sentence-item .check-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 0.7rem 1.7rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    box-shadow: 0 2px 8px rgba(0,112,243,0.08);
  }
  .sentence-item .check-btn:hover {
    transform: translateY(-2px);
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
  }
  .result {
    font-size: 1.05rem;
    font-weight: 500;
    margin-top: 0.5rem;
    display: none;
    border-radius: 8px;
    padding: 0.6rem 1rem;
  }
  .result.correct {
    background: #e8f5e9;
    color: #388e3c;
    display: block;
    border: 1.5px solid #4CAF50;
  }
  .result.incorrect {
    background: #ffebee;
    color: #c62828;
    display: block;
    border: 1.5px solid #f44336;
  }
  @media (max-width: 700px) {
    .practice-page {
        padding: 1.2rem 0.5rem;
    }
    .practice-level-container {
        padding: 1.2rem 0.5rem;
    }
  }

  .level-buttons {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1.5rem;
  }
  .level-select-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: 1.2rem 2.5rem;
    font-size: 1.25rem;
    font-weight: 600;
    box-shadow: 0 2px 12px rgba(0,112,243,0.10);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
    display: flex;
    align-items: center;
    gap: 0.7rem;
    outline: none;
  }
  .level-select-btn:hover, .level-select-btn:focus {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 4px 20px rgba(0,112,243,0.18);
  }
  .level-select-btn i {
    font-size: 1.3em;
    margin-right: 0.3em;
  }

  .practice-header .back-btn {
    background: #fff;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    padding: 0.7rem 1.7rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border 0.2s, transform 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
  }
  .practice-header .back-btn:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
    transform: translateY(-2px);
  }
  .button-container {
    display: flex;
    gap: 1rem;
    margin-top: 1.2rem;
  }
  .check-btn, .skip-btn, .hint-btn {
    border: none;
    border-radius: 50px;
    padding: 0.7rem 1.7rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, transform 0.2s;
    box-shadow: 0 2px 8px rgba(0,112,243,0.08);
    display: flex;
    align-items: center;
    gap: 0.5rem;
  }
  .check-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
  }
  .check-btn:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    transform: translateY(-2px);
  }
  .skip-btn {
    background: #fff;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
  }
  .skip-btn:hover {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
    transform: translateY(-2px);
  }
  .hint-btn {
    background: #f0f0f0;
    color: #888;
    border: none;
    border-radius: 50px;
    padding: 0.7rem 1.2rem;
    font-size: 1.1rem;
    font-weight: 500;
    margin-left: 0.5rem;
  }
  .hint-btn:hover {
    background: var(--primary-color);
    color: #fff;
    transform: translateY(-2px);
  }

  /* Hide sentence count/progress info in practice header */
  .practice-header .progress-info {
    display: none !important;
  }

  .sentence-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    margin-top: 2.5rem;
  }
  .sentence-card {
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(0,112,243,0.08);
    padding: 2.2rem 2rem 2rem 2rem;
    min-width: 340px;
    max-width: 480px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 1.2rem;
  }
  .turkish-sentence {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.7rem;
    text-align: left;
  }
  .input-container {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    margin-bottom: 0.5rem;
  }
  .answer-input {
    flex: 1;
    padding: 1.1rem 1.3rem;
    border-radius: 10px;
    border: 1.5px solid #e0e0e0;
    font-size: 1.15rem;
    transition: border 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
    background: #f8f9fa;
  }
  .answer-input:focus {
    border: 1.5px solid var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0,112,243,0.10);
    background: #fff;
  }
  .hint-btn {
    background: #f0f0f0;
    color: #888;
    border: none;
    border-radius: 50px;
    padding: 0.7rem 1.2rem;
    font-size: 1.1rem;
    font-weight: 500;
    margin-left: 0.5rem;
    transition: background 0.2s, color 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px rgba(0,112,243,0.04);
  }
  .hint-btn:hover {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 16px rgba(0,112,243,0.10);
  }
  .button-container {
    display: flex;
    gap: 1.2rem;
    margin-top: 1.2rem;
    justify-content: flex-start;
  }
  @media (max-width: 700px) {
    .sentence-card {
        padding: 1.2rem 0.7rem 1rem 0.7rem;
        min-width: 0;
        max-width: 98vw;
    }
  }

  .result-container {
    margin-top: 1.1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 38px;
    width: 100%;
  }
  .result-icon {
    font-size: 2.1rem;
    margin-bottom: 0.3rem;
  }
  .result-container .correct-answer {
    font-size: 1.08rem;
    color: #388e3c;
    background: #e8f5e9;
    border-radius: 8px;
    padding: 0.5rem 1.2rem;
    margin-top: 0.3rem;
    display: inline-block;
  }
  .result-container .wrong, .result-container .incorrect {
    color: #c62828;
    background: #ffebee;
    border-radius: 8px;
    padding: 0.5rem 1.2rem;
    margin-top: 0.3rem;
    font-size: 1.08rem;
    display: inline-block;
  }

  .center-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, #fff, #e8f5e9 80%);
    color: #222;
    font-size: 1.5rem;
    font-weight: 700;
    padding: 1.5rem 2.5rem;
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(0,112,243,0.18);
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    animation: toastFadeInOut 1.2s forwards;
  }
  @keyframes toastFadeInOut {
    0% { opacity: 0; transform: translate(-50%, -60%) scale(0.95); }
    10% { opacity: 1; transform: translate(-50%, -50%) scale(1.04); }
    80% { opacity: 1; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 0; transform: translate(-50%, -40%) scale(0.95); }
  }

  .konusma-sections {
    display: flex;
    flex-direction: column;
    gap: 3.5rem;
    margin: 3rem 0 2rem 0;
  }
  .konusma-row {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    justify-content: center;
  }
  .konusma-row-reverse {
    flex-direction: row-reverse;
  }
  .konusma-img {
    width: 320px;
    max-width: 40vw;
    border-radius: 18px;
    box-shadow: 0 4px 24px rgba(0,112,243,0.10);
    object-fit: cover;
  }
  .konusma-text {
    flex: 1;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    padding: 2.2rem 2rem;
    min-width: 240px;
  }
  .konusma-text h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
  }
  .konusma-text p {
    color: #333;
    font-size: 1.08rem;
    line-height: 1.7;
  }
  @media (max-width: 900px) {
    .konusma-row, .konusma-row-reverse {
        flex-direction: column !important;
        gap: 1.5rem;
        align-items: stretch;
    }
    .konusma-img {
        width: 100%;
        max-width: 100vw;
        min-width: 0;
    }
    .konusma-text {
        padding: 1.2rem 0.7rem;
    }
  }

  /* Mobile Navigation */
  @media screen and (max-width: 768px) {
    body {
        padding-top: 60px;
    }

    nav {
        padding: 0;
        height: 60px;
    }

    .nav-links {
        display: none;
    }

    .logo-container {
        width: 100%;
        justify-content: center;
        padding: 0 10px;
    }
    
    .logo-text {
        font-size: 0.9rem;
        max-width: 180px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .logo-img {
        height: 35px;
    }
  }

  /* Animation for mobile menu */
  @keyframes navLinkFade {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
  }

  /* Content Styles */
  main {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    box-sizing: border-box;
  }

  /* Fix for content shifting */
  section {
    margin-top: 20px;
    margin-bottom: 20px;
  }

  /* Side Menu Styles */
  .side-menu {
    position: fixed;
    left: -260px;
    top: 0;
    width: 250px;
    height: 100vh;
    background: #fff;
    box-shadow: 2px 0 8px rgba(0,0,0,0.08);
    z-index: 2000;
    transition: left 0.3s cubic-bezier(.4,0,.2,1);
    display: flex;
    flex-direction: column;
    padding-top: 32px;
  }
  .side-menu.open {
    left: 0;
  }
  .side-menu-header {
    display: flex;
    justify-content: flex-end;
    padding: 0 16px;
  }
  .close-side-menu {
    font-size: 2rem;
    cursor: pointer;
    color: #333;
  }
  .side-menu-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
  }
  .side-menu-links li {
    border-bottom: 1px solid #f0f0f0;
  }
  .side-menu-links a {
    display: block;
    padding: 16px 24px;
    color: #222;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
    transition: background 0.2s;
  }
  .side-menu-links a:hover, .side-menu-links a.active {
    background: #f5f5f5;
    color: #0070f3;
  }

  @media screen and (max-width: 768px) {
    .burger {
      display: block !important;
      position: absolute;
      right: 20px;
      top: 50%;
      transform: translateY(-50%);
      z-index: 2100;
      cursor: pointer;
    }
    .nav-links {
      display: none !important;
    }
    .side-menu {
      display: flex;
    }
  }
  @media screen and (min-width: 769px) {
    .side-menu {
      display: none !important;
    }
  }

  html, body {
    overflow-x: hidden;
  }

  main, section, .practice-page {
    max-width: 100vw;
    box-sizing: border-box;
  }