@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
  }
  .fade-in {
    animation: fadeIn 1.5s ease-out both;
  }
  
  :root {
    --card-color: #151515;
  }
  body {
    margin: 0;
    min-height: 100vh;
    font-family: "Inter", sans-serif;
    background: #000;
    color: #fff;
    position: relative;
  }
  
  body::before {
    --size: 45px;
    --line: color-mix(in hsl, canvasText, transparent 70%);
    content: '';
    height: 100vh;
    width: 100vw;
    position: fixed;
    background: linear-gradient(
          90deg,
          var(--line) 1px,
          transparent 1px var(--size)
        )
        50% 50% / var(--size) var(--size),
      linear-gradient(var(--line) 1px, transparent 1px var(--size))
        50% 50% / var(--size) var(--size);
    mask: linear-gradient(-20deg, transparent 50%, white);
    top: 0;
    transform-style: flat;
    pointer-events: none;
    z-index: -1;
  }
  .main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
  }
  
  header {
    position: relative;
    text-align: center;
    padding: 60px 20px;
    max-width: 900px;
    margin: 0 auto;
  }
  
  header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
  }
  header p {
    font-size: 1.1rem;
    color: #ccc;
    max-width: 700px;
    margin: 0 auto 30px;
    line-height: 1.6;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  .get-started-container {
    text-align: center;
    margin: 20px 0;
  }
  .animated-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 16px 36px;
    border: 4px solid transparent;
    font-size: 16px;
    font-weight: 600;
    background-color: #000;
    color: #fff;
    border-radius: 12px;
    box-shadow: 0 0 0 2px #fff;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
  }
  .animated-button svg {
    position: absolute;
    width: 24px;
    fill: #fff;
    z-index: 9;
    transition: all 0.8s cubic-bezier(0.23, 1, 0.32, 1);
  }
  .animated-button .arr-1 {
    right: 16px;
  }
  .animated-button .arr-2 {
    left: -25%;
  }
  .animated-button .circle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background-color: #fff;
    border-radius: 50%;
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.23, 1, 0.32, 1);
  }
  .animated-button .text {
    position: relative;
    z-index: 1;
    transform: translateX(-12px);
    transition: all 0.8s cubic-bezier(0.23, 1, 0.32, 1);
  }
  .animated-button:hover {
    box-shadow: 0 0 0 12px transparent;
    color: #000;
    border-radius: 12px;
  }
  .animated-button:hover .arr-1 {
    right: -25%;
  }
  .animated-button:hover .arr-2 {
    left: 16px;
  }
  .animated-button:hover .text {
    transform: translateX(12px);
  }
  .animated-button:hover svg {
    fill: #000;
  }
  .animated-button:active {
    scale: 0.95;
    box-shadow: 0 0 0 4px #fff;
  }
  .animated-button:hover .circle {
    width: 220px;
    height: 220px;
    opacity: 1;
  }
  
  .smart-bookmarks {
    padding: 40px 20px;
    margin-bottom: 40px;
  }
  .smart-bookmarks h2 {
    text-align: center;
    margin-bottom: 1rem;
  }
  .section-desc {
    text-align: center;
    font-size: 1rem;
    color: #ccc;
    margin-bottom: 30px;
  }
  
  
  .bookmark-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
  }
  .card {
    display: block;
    text-decoration: none;
    color: inherit;
    position: relative;
    padding: 1px;
    overflow: hidden;
    border-radius: 10px;
    background-color: #222;
  }
  .card::before,
  .card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: inherit;
    opacity: 0;
    transition: opacity 500ms;
  }
  .card::before {
    background: radial-gradient(
      800px circle at var(--mouse-x) var(--mouse-y),
      rgba(255, 255, 255, 0.06),
      transparent 40%
    );
    z-index: 3;
  }
  .card::after {
    background: radial-gradient(
      600px circle at var(--mouse-x) var(--mouse-y),
      rgba(255, 255, 255, 0.4),
      transparent 40%
    );
    z-index: 1;
  }
  #cards:hover > .card::after {
    opacity: 1;
  }
  .card:hover::before {
    opacity: 1;
  }
  .card-content {
    background-color: var(--card-color);
    border-radius: inherit;
    position: relative;
    z-index: 2;
    padding: 16px;
  }
  .card-content h3 {
    margin: 0 0 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 1.1rem;
    font-weight: 600;
  }
  .card-content p {
    margin: 0;
    font-size: 0.95rem;
    color: #ccc;
    line-height: 1.4;
  }
  .drag-handle {
    display: inline-flex;
    align-items: center;
    color: #ccc;
    text-decoration: none;
    font-size: 0.9rem;
  }
  .drag-handle svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
  }
  .drag-handle:hover {
    color: #00b7ff;
  }
  
  .video-section {
    max-width: 650px;
    margin: 10px auto;
    text-align: center;
  }
  .video-section h2 {
    font-size: 1.5rem;
    margin-bottom: 5px;
  }
  
  .video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; 
    height: 0;
    overflow: hidden;
    border: 1px solid #fff; 
    border-radius: 8px;
    background: #000;
  }
  .video-container .coming-soon {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 2rem;
    font-weight: 700;
    animation: fadeIn 1.5s ease-out both;
  }
  
  .quick-start {
    padding: 40px 20px 80px;
    text-align: center;
  }
  .quick-start h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 30px;
  }
  .guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
  }
  .step {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.05);
  }
  .step h3 {
    margin: 0 0 10px;
    font-size: 1.1rem;
    font-weight: 600;
  }
  .step p {
    margin: 0;
    font-size: 0.95rem;
    color: #ccc;
    line-height: 1.5;
  }
  
  footer {
    text-align: center;
  }
  