:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --text: #18181b;
  --muted: #71717a;
  --border: #e4e4e7;
  --accent: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0f;
    --surface: #16161d;
    --text: #f4f4f5;
    --muted: #a1a1aa;
    --border: #27272a;
    --accent: #60a5fa;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Noto Sans JP", system-ui, sans-serif;
  font-weight: 300;
  line-height: 1.8;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* Hero */
.hero {
  padding: 96px 0 56px;
  border-bottom: 1px solid var(--border);
}
.profile {
  display: flex;
  align-items: center;
  gap: 24px;
}
.avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 1px solid var(--border);
  object-fit: cover;
}
.location {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}
.location svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}
.hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  font-weight: 200;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

/* Sections */
.section { padding: 56px 0; }
.section h2 {
  margin: 0 0 20px;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

/* SNS */
.links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
}
.link-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 24px;
  color: var(--text);
}
.link-card:hover {
  text-decoration: none;
}
.link-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  fill: currentColor;
}
.link-label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
}
.link-id {
  font-size: 1.05rem;
  font-weight: 400;
}