* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  body {
    font-family: Arial, sans-serif;
    background: url("./back.png") no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
  }
  
  body::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 75, 75, 0.2);
    z-index: -1;
  }
  
  .container {
    width: 100%;
    max-width: 1200px;
    width: max-content;
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 12px 30px rgba(0,0,0,0.15);
    margin: 20px;
    padding: 1rem;
  }
  
  @keyframes fadeIn {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  header {
    background: linear-gradient(45deg, #ff6a6a, #ff4b4b);
    padding: 1.5rem;
    text-align: center;
  }
  
  header h1 {
    font-size: 1.8rem;
    font-weight: bold;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 1px;
  }
  
  main {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  
  #inputSection {
    width: 100%;
    margin-bottom: 1.5rem;
  }
  
  .input-area {
    width: 100%;
    margin-bottom: 1.2rem;
  }
  
  #textInput {
    width: 100%;
    height: 120px;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    resize: none;
    font-size: 1rem;
    color: #333;
    transition: border-color 0.3s ease;
  }
  
  #textInput:focus {
    outline: none;
    border-color: #ff6a6a;
  }
  
  #textInput::placeholder {
    color: #aaa;
  }
  
  #analyzeButton {
    width: 100%;
    padding: 0.9rem;
    font-size: 1rem;
    font-weight: bold;
    color: #fff;
    background: linear-gradient(45deg, #ff6a6a, #ff4b4b);
    border: none;
    border-radius: 24px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: background 0.3s ease, transform 0.2s ease;
    margin-bottom: 1.5rem;
  }
  
  #analyzeButton:hover {
    background: linear-gradient(45deg, #ff4b4b, #ff6a6a);
    transform: translateY(-2px);
  }
  
  #analyzeButton.loading {
    pointer-events: none;
  }
  
  #analyzeButton.loading::after {
    content: "";
    position: absolute;
    top: 0;
    left: -150%;
    width: 150%;
    height: 100%;
    background: linear-gradient(120deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.5) 50%, rgba(255,255,255,0) 100%);
    animation: slide 1.2s infinite;
  }
  
  @keyframes slide {
    from {
      left: -150%;
    }
    to {
      left: 150%;
    }
  }
  
  #cardsSection {
    width: 100%;
  }
  
  #resultHeader {
    text-align: center;
    font-size: 1.1rem;
    color: #444;
    margin-bottom: 1rem;
  }
  
  .cards-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding: 1rem;
    height: 600px;
    overflow: auto;
  }
  
  .track-block {
    background-color: #f9f9f9;
    padding: 0.8rem;
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: cardFadeIn 0.5s ease forwards;
  }
  
  @keyframes cardFadeIn {
    from {
      opacity: 0;
      transform: scale(0.95);
    }
    to {
      opacity: 1;
      transform: scale(1);
    }
  }
  
  @media (max-width: 1024px) {
    .cards-container {
      grid-template-columns: repeat(2, 1fr);
    }
  }
  
  @media (max-width: 768px) {
    .cards-container {
      grid-template-columns: repeat(1, 1fr);
    }
  }
  
  @media (max-width: 480px) {
    .cards-container {
      grid-template-columns: repeat(1, 1fr);
    }
  }
  
  .track-block:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.15);
  }
  
  .track-block strong {
    font-size: 1rem;
    display: block;
    margin-bottom: 0.5rem;
    color: #ff4b4b;
  }
  
  .track-iframe {
    margin-top: 0.5rem;
    display: flex;
    justify-content: center;
  }
  
  .track-iframe iframe {
    border: none;
    width: 100%;
    max-width: 400px;
    height: 200px;
    border-radius: 8px;
  }
  
  .reset-btn {
    width: 100%;
    padding: 0.9rem;
    font-size: 1rem;
    font-weight: bold;
    color: #fff;
    background: linear-gradient(45deg, #4b9eff, #4bafff);
    border: none;
    border-radius: 24px;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
    margin-top: 1rem;
  }
  
  .reset-btn:hover {
    background: linear-gradient(45deg, #4bafff, #4b9eff);
    transform: translateY(-2px);
  }
  
  .notification {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #ff4b4b;
    color: #fff;
    padding: 0.6rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    opacity: 0;
    transition: opacity 0.3s ease;
  }
  
  .notification.show {
    opacity: 1;
  }
  
  @media (max-width: 480px) {
    .container {
      width: 90%;
      padding: 1rem;
    }
    header h1 {
      font-size: 1.5rem;
    }
    #textInput {
      height: 100px;
    }
    #analyzeButton {
      font-size: 0.95rem;
      padding: 0.8rem;
    }
  }