:root{
  --bg:#f8f5f0;            /* ???????? */
  --panel:#ffffff;         /* ??????? */
  --text:#4b4b3f;          /* ??????????? */
  --muted:#8a8a77;         /* ???????????? */
  --accent:#a3b18a;        /* ????????????? */
  --accent-weak:#8d9d77;   /* ???????? */
  --radius:16px;
  --shadow:0 6px 20px rgba(0,0,0,.08);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
}

.container{
  max-width:880px;
  margin:0 auto;
  padding:32px 20px 56px;
}

.hero{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
  background:var(--panel);
  border:1px solid rgba(0,0,0,.05);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:28px;
}

.avatar{
  border-radius:50%;
  border:3px solid var(--accent);
  box-shadow:0 6px 20px rgba(0,0,0,.1);
}

.title{
  margin:4px 0 0;
  font-size:clamp(24px, 4vw, 36px);
  letter-spacing:.02em;
  color:var(--accent-weak);
}

.desc{
  margin:4px 0 0;
  color:var(--muted);
  text-align:center;
}

.links{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:14px;
  margin:22px 0 0;
}
@media (max-width:720px){
  .links{ grid-template-columns:1fr; }
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:14px 18px;
  background:var(--accent);
  color:#fff;
  text-decoration:none;
  font-weight:700;
  border-radius:12px;
  border:1px solid rgba(0,0,0,.05);
  box-shadow:var(--shadow);
  transition:.18s transform ease, .18s background ease;
}
.btn:hover{
  transform:translateY(-2px);
  background:var(--accent-weak);
}
.btn:active{ transform:translateY(0) scale(.995); }

.about{
  margin-top:28px;
  padding:22px;
  background:var(--panel);
  border:1px solid rgba(0,0,0,.05);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.about h2{
  margin:0 0 8px;
  font-size:20px;
  color:var(--accent-weak);
}
.tips{
  margin:10px 0 0 20px;
  color:var(--muted);
}
.tips code{
  background:#f0ede6;
  padding:2px 6px;
  border-radius:6px;
}

.footer{
  margin-top:24px;
  text-align:center;
  color:var(--muted);
  opacity:.9;
}

/* ???????????? */
:focus-visible{
  outline:3px solid rgba(163,177,138,.8);
  outline-offset:3px;
}
.btn:focus-visible{
  box-shadow:0 0 0 4px rgba(163,177,138,.35);
}

/* ??????? */
@media (prefers-reduced-motion: reduce){
  *{ animation:none !important; transition:none !important; }
}