:root{
  --bg:#ffffff;
  --ink:#111111;
  --muted:#5b5b5b;
  --brand:#111111;
  --card:#f6f6f7;
  --radius:18px;
  --shadow:0 8px 24px rgba(0,0,0,.08);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--ink);font-family:Inter,system-ui,Arial,sans-serif;line-height:1.6}
img{max-width:100%;display:block}

.container{width:min(1080px, 92%);margin-inline:auto}

.site-header{
  position:sticky;top:0;z-index:10;background:rgba(255,255,255,.9);
  border-bottom:1px solid #eee;backdrop-filter:saturate(180%) blur(8px)
}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 0}
.brand{font-weight:800;text-decoration:none;color:var(--ink);letter-spacing:.2px}
.nav a{margin-left:18px;text-decoration:none;color:var(--ink)}
.nav a:hover{opacity:.7}
.more{display:inline-block;margin-left:16px}
.more summary{cursor:pointer;list-style:none}
.more summary::-webkit-details-marker{display:none}
.more-menu{position:absolute;margin-top:8px;background:#fff;border:1px solid #eee;border-radius:10px;box-shadow:var(--shadow);padding:10px}
.more[open] .more-menu a{display:block;padding:6px 8px}

.hero{
  display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center;
  padding:56px 0 32px;
}
.eyebrow{letter-spacing:.1em;color:var(--muted);margin:0 0 8px;font-weight:600}
.headline{font-size:48px;line-height:1.1;margin:0 0 12px;font-weight:800}
.subhead{color:#333;margin:0 0 20px;max-width:52ch}
.btn{
  display:inline-block;background:var(--ink);color:#fff;text-decoration:none;
  padding:12px 18px;border-radius:999px;font-weight:600
}
.btn:hover{opacity:.9}
.hero-photo img {
  border-radius: 24px;
  box-shadow: var(--shadow);
  max-width: 320px;
  width: 100%;
  height: auto;
}

.card{
  background:var(--card);border-radius:var(--radius);padding:28px;margin:24px auto;box-shadow:var(--shadow)
}
.about-grid{
  display:grid;grid-template-columns:1fr 1fr auto;gap:18px;align-items:center
}
.name{margin:0 0 4px;font-size:24px;font-weight:800}
.role,.affil{margin:0;color:var(--muted)}
.link{font-weight:600;text-decoration:none;color:var(--ink);border-bottom:1px solid #ccc}
.link:hover{opacity:.8}

.section{padding:40px 0}
.section h2{margin:0 0 8px}
.section p{margin:0;color:#333}

.site-footer{border-top:1px solid #eee;margin-top:40px}
.site-footer .container{padding:18px 0;color:var(--muted);font-size:14px}

/* responsive */
@media (max-width: 840px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 20px;
    text-align: center;         /* 텍스트 중앙 정렬 */
    justify-items: center;      /* 그리드 내부 중앙 배치 */
  }

  .hero-text {
    display: flex;
    flex-direction: column;
    align-items: center;        /* 버튼 포함 텍스트 모두 가운데 정렬 */
  }

  .headline {
    font-size: 36px;
  }

  .hero-photo img {
    max-width: 260px;           /* 모바일일 때 사진 크기 줄이기 */
    height: auto;
    border-radius: 20px;
  }
}