*, *::before, *::after {
        box-sizing: border-box;
      }

      :root {
        --bg: #f0f0f0;
        --bg-fade: #e8e8e8;
        --text-primary: #1a1a1a;
        --text-muted: #c0c0c0;
        --text-adieu: #505050;
        --accent: #999;
        --rule: #ccc;
      }

      html {
        scroll-behavior: smooth;
      }

      body {
        font-family: 'Inter';
        margin: 0;
        padding: 0;
        background-color: var(--bg);
        color: var(--text-primary);
        overflow-x: hidden;
      }

      /* Original Section */

      .hero {
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh;
        position: relative;
      }

      .container {
        text-align: center;
      }

      h1, h2 {
        font-size: 3rem;
        margin: 0;
      }

      h2 > span {
        color: var(--text-muted);
      }

      /* Scroll indicator */

      .scroll-hint {
        position: absolute;
        bottom: 2.5rem;
        left: 50%;
        transform: translateX(-50%);
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
        opacity: 0;
        animation: fadeInHint 1.5s ease 2s forwards;
      }

      .scroll-hint span {
        font-family: 'Source Serif 4', serif;
        font-size: 0.8rem;
        font-style: italic;
        letter-spacing: 0.08em;
        color: var(--accent);
      }

      .scroll-line {
        width: 1px;
        height: 32px;
        background: var(--accent);
        animation: pulse 2s ease-in-out 2.5s infinite;
        transform-origin: top;
      }

      @keyframes fadeInHint {
        to { opacity: 1; }
      }

      @keyframes pulse {
        0%, 100% { opacity: 0.3; transform: scaleY(1); }
        50% { opacity: 1; transform: scaleY(1.3); }
      }

      /* Adieu Section (Add-On) */

      .adieu {
        min-height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        padding: 4rem 2rem;
        background: linear-gradient(180deg, var(--bg) 0%, var(--bg-fade) 100%);
        position: relative;
        overflow: hidden;
      }

      .adieu::before {
        content: '';
        position: absolute;
        inset: 0;
        background-image: url('adieu.png');
        background-repeat: no-repeat;
        background-position: bottom center;
        background-size: cover;
        opacity: 0.09;

        pointer-events: none;

        -webkit-mask-image:
          radial-gradient(
            ellipse 115% 90% at 50% 75%,
            rgba(0,0,0,1) 30%,
            rgba(0,0,0,0.9) 48%,
            rgba(0,0,0,0.6) 65%,
            transparent 85%
          );

        mask-image:
          radial-gradient(
            ellipse 115% 90% at 50% 75%,
            rgba(0,0,0,1) 30%,
            rgba(0,0,0,0.9) 48%,
            rgba(0,0,0,0.6) 65%,
            transparent 85%
          );
      }

      .adieu-content {
        max-width: 540px;
        width: 100%;
        position: relative;
        z-index: 1;
      }

      .adieu-rule {
        width: 48px;
        height: 1px;
        background: var(--rule);
        border: none;
        margin: 0 0 1rem 0;
        opacity: 0;
        transform: scaleX(0);
        transform-origin: left;
      }

      .adieu-text {
        font-family: 'Source Serif 4', serif;
        font-size: 1.15rem;
        font-weight: 300;
        line-height: 1.85;
        color: var(--text-adieu);
        opacity: 0;
        transform: translateY(20px);
      }

      .adieu-text p {
        margin: 0 0 1em 0;
      }

      .adieu-text p:last-child {
        margin-bottom: 0;
      }

      .adieu-text em {
        font-weight: 400;
        color: var(--text-primary);
        font-style: normal;
      }

      .adieu-text a {
        color: var(--text-adieu);
        text-decoration: none;
        border-bottom: 1px solid var(--rule);
        transition: border-color 0.3s ease;
      }

      .adieu-text a:hover {
        border-color: var(--text-primary);
      }

      .adieu-year {
        display: inline-block;
        font-family: 'Inter';
        font-size: 0.75rem;
        font-weight: 400;
        letter-spacing: 0.12em;
        text-transform: uppercase;
        color: var(--accent);
        margin-top: 3rem;
        opacity: 0;
        transform: translateY(10px);
      }

      span.adieu-txt {
        display: block;
        font-family: 'Inter';
        font-size: 0.65rem;
        font-weight: 400;
        letter-spacing: 0.06em;
        color: var(--rule);
        margin-top: 1.2rem;
        text-align: right;
      }

      a.adieu-txt {
        color: var(--rule);
        text-decoration: none;
        transition: color 0.3s ease;
      }

      a.adieu-txt:hover {
        color: var(--accent);
      }

      /* Animations via IntersectionObserver */

      .adieu-rule.visible {
        animation: ruleIn 0.8s ease forwards;
      }

      .adieu-text.visible {
        animation: fadeUp 1s ease 0.3s forwards;
      }

      .adieu-year.visible {
        animation: fadeUp 0.8s ease 0.8s forwards;
      }

      @keyframes ruleIn {
        to {
          opacity: 1;
          transform: scaleX(1);
        }
      }

      @keyframes fadeUp {
        to {
          opacity: 1;
          transform: translateY(0);
        }
      }

      /* Responsive */

      @media (max-width: 600px) {
        h1, h2 {
          font-size: 2rem;
        }
        .adieu-text {
          font-size: 1.05rem;
        }
        .adieu {
          padding: 3rem 1.5rem;
        }
      }