:root{
    --bg: #fff;
    --text: #111;
    --muted: #666;
    --line: rgba(0,0,0,.10);
    --shadow: 0 10px 30px rgba(0,0,0,.06);
    --radius: 18px;
    --container: 1100px;
  }
  
  html { scroll-behavior: smooth; }
  
  body{
    background: var(--bg);
    color: var(--text);
    font-family: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif;
    line-height: 1.8;
    letter-spacing: 0.02em;
  }
  
  h1,h2,h3{
    font-family: "Playfair Display", serif;
    letter-spacing: 0.01em;
  }
  
  .container{
    width: min(var(--container), 92vw);
    margin-inline: auto;
  }
  
  .section{
    padding: 96px 0;
  }
  
  .section__title{
    font-size: clamp(28px, 3vw, 40px);
    margin-bottom: 18px;
  }
  
  .section__desc{
    color: var(--muted);
    margin-bottom: 28px;
  }
  
  /* header */
  .header{
    position: sticky;
    top: 0;
    background: rgba(255,255,255,.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
    z-index: 10;
  }
  
  .header__inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding: 16px 0;
  }
  
  .logo{
    display:flex;
    align-items:center;
    gap: 10px;
    text-decoration:none;
    color: var(--text);
  }
  
  .logo__mark{
    display:grid;
    place-items:center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--line);
    border-radius: 999px;
    font-weight: 700;
  }
  
  .nav{
    display:flex;
    gap: 18px;
  }
  
  .nav__link{
    text-decoration:none;
    color: var(--text);
    font-size: 14px;
    padding: 8px 10px;
    border-radius: 999px;
  }
  .nav__link:hover{
    background: rgba(0,0,0,.04);
  }
  
  /* hero */
  .hero{
    padding-top: 90px;
  }
  .hero__inner{
    padding: 56px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }
  .hero__eyebrow{
    color: var(--muted);
    letter-spacing: .2em;
    text-transform: uppercase;
    font-size: 12px;
  }
  .hero__title{
    margin-top: 10px;
    font-size: clamp(42px, 5vw, 64px);
    line-height: 1.1;
  }
  .hero__lead{
    margin-top: 18px;
    color: var(--muted);
    max-width: 60ch;
  }
  .hero__cta{
    margin-top: 26px;
    display:flex;
    gap: 12px;
    flex-wrap: wrap;
  }
  
  /* button */
  .btn{
    display:inline-block;
    padding: 12px 18px;
    border-radius: 999px;
    border: 1px solid var(--text);
    background: var(--text);
    color: #fff;
    text-decoration:none;
    font-size: 14px;
  }
  .btn--ghost{
    background: transparent;
    color: var(--text);
  }
  
  /* about */
  .about{
    display:grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 28px;
  }
  .meta{
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 18px;
  }
  .meta__row{
    display:grid;
    grid-template-columns: 90px 1fr;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
  }
  .meta__row:last-child{ border-bottom: none; }
  .meta dt{ color: var(--muted); font-size: 13px; }
  .meta dd{ font-size: 14px; }
  
  /* works */
  .works-grid{
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }
  .work{
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 18px;
    box-shadow: var(--shadow);
  }
  .work__title{ font-family: "Noto Sans JP", sans-serif; font-weight: 700; }
  .work__desc{ color: var(--muted); font-size: 14px; margin-top: 8px; }
  .work__tags{ margin-top: 12px; display:flex; gap: 8px; flex-wrap: wrap; }
  .tag{
    font-size: 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 4px 10px;
  }
  
  /* contact */
  .contact{
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 18px;
  }
  .field{ display:block; margin-bottom: 14px; }
  .field__label{ display:block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
  .field__input{
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 12px 12px;
    background: #fff;
    color: var(--text);
  }
  .field__textarea{ resize: vertical; }
  .contact__note{ margin-top: 10px; color: var(--muted); font-size: 12px; }
  
  .footer{
    border-top: 1px solid var(--line);
    padding: 24px 0;
  }
  .footer__inner{
    display:flex;
    justify-content:space-between;
    align-items:center;
  }
  .to-top{
    text-decoration:none;
    color: var(--text);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 6px 10px;
  }
  
  /* reveal animation (JSでis-visible付与) */
  .reveal{
    opacity: 0;
    transform: translateY(8px);
    transition: opacity .6s ease, transform .6s ease;
  }
  .reveal.is-visible{
    opacity: 1;
    transform: translateY(0);
  }
  
  /* responsive */
  @media (max-width: 900px){
    .works-grid{ grid-template-columns: 1fr; }
    .about{ grid-template-columns: 1fr; }
    .hero__inner{ padding: 28px; }
  }