:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --text: #1c2333;
  --text-muted: #5c667a;
  --hair-blue: #a2b9ff;
  --hair-blue-dark: #7a9af0;
  --sapphire: #2f6fd6;
  --gold: #c9a84c;
  --border: #e2e8f0;
  --shadow: 0 4px 24px rgba(28, 35, 51, 0.06);
  --radius: 14px;
  --max-width: 640px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 20px 48px;
}

/* --- Hero: profile + SNS --- */

.hero {
  text-align: center;
  margin-bottom: 40px;
}

.profile__avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
  border: 3px solid var(--hair-blue);
  box-shadow: 0 0 0 4px rgba(162, 185, 255, 0.25);
  margin-bottom: 16px;
}

.profile__name {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: 8px;
}

.profile__bio {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 28em;
  margin: 0 auto 24px;
}

.sns {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.sns__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 140px;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}

.sns__btn:hover {
  transform: translateY(-2px);
}

.sns__btn--youtube {
  background: #ff0000;
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 0, 0, 0.25);
}

.sns__btn--x {
  background: #0f1419;
  color: #fff;
  box-shadow: 0 4px 16px rgba(15, 20, 25, 0.2);
}

.sns__btn--fanbox {
  background: #0096fa;
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 150, 250, 0.25);
}

.sns__btn--skeb {
  background: #e8488a;
  color: #fff;
  box-shadow: 0 4px 16px rgba(232, 72, 138, 0.25);
}

.sns__btn--youtube::before,
.sns__btn--x::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  margin-right: 8px;
  opacity: 0.85;
}

/* --- Link sections --- */

.section {
  margin-bottom: 32px;
}

.section__title {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sapphire);
  margin-bottom: 12px;
  padding-left: 2px;
}

.section__title::after {
  content: "";
  display: block;
  width: 32px;
  height: 2px;
  background: linear-gradient(90deg, var(--hair-blue), transparent);
  margin-top: 6px;
  border-radius: 1px;
}

.link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.link-card {
  display: block;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow);
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}

.link-card:hover {
  border-color: var(--hair-blue);
  box-shadow: 0 6px 28px rgba(162, 185, 255, 0.18);
  transform: translateY(-1px);
}

.link-card__title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--hair-blue-dark);
  margin-bottom: 2px;
}

.link-card:hover .link-card__title {
  color: var(--sapphire);
}

.link-card__desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.site-footer {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

@media (max-width: 480px) {
  .page {
    padding: 24px 16px 40px;
  }

  .profile__name {
    font-size: 1.5rem;
  }

  .sns__btn {
    min-width: 0;
    flex: 1 1 120px;
  }
}