/* ===========================
   Google Fonts
=========================== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+JP:wght@300;400;500&display=swap');

/* ===========================
   CSS カスタムプロパティ
=========================== */
:root {
  --bg: #f5f0f2;
  --text: #3c3838;
  --subtext: #8c8088;
  --accent: #3c3838;
  --btn-bg: #ede8eb;
  --btn-hover: #e4dde1;
  --btn-border: #d8d0d4;
  --btn-text: #3c3838;
  --sns-color: #8c8088;
  --hero-bg: #e8dfe4;
  --radius: 99px;
}

[data-theme="dark"] {
  --bg: #1c1618;
  --text: #e8e2e5;
  --subtext: #9c9098;
  --accent: #e8e2e5;
  --btn-bg: #2c2226;
  --btn-hover: #382a30;
  --btn-border: #44383c;
  --btn-text: #e8e2e5;
  --sns-color: #b8aeb2;
  --hero-bg: #241c20;
}

/* ===========================
   ベース
=========================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Noto Serif JP', 'Hiragino Mincho ProN', 'Yu Mincho', serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 64px 20px 80px;
  transition: background 0.4s, color 0.4s;
}

/* ===========================
   ダーク切替ボタン
=========================== */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--subtext);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: background 0.2s, transform 0.15s;
}
.theme-toggle:hover {
  background: var(--btn-hover);
  transform: scale(1.08);
}

/* ===========================
   カード全体
=========================== */
.card {
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: fadeUp 0.6s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===========================
   プロフィール
=========================== */
.profile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
  text-align: center;
}

.avatar-wrap {
  position: relative;
}

.avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  background: var(--hero-bg);
}

.name {
  font-size: 1.45rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--text);
}

.handle {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--subtext);
  font-weight: 300;
}

.bio {
  font-size: 0.82rem;
  color: var(--subtext);
  line-height: 2;
  letter-spacing: 0.06em;
  font-weight: 300;
}

/* ===========================
   区切り線
=========================== */
.divider {
  width: 24px;
  height: 1px;
  background: var(--btn-border);
  margin: 4px auto 0;
}

/* ===========================
   SNS アイコン
=========================== */
.sns-row {
  display: flex;
  gap: 14px;
  margin-bottom: 36px;
}

.sns-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--btn-border);
  background: transparent;
  color: var(--sns-color);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: background 0.2s, color 0.2s, transform 0.18s;
}

.sns-icon svg {
  width: 18px;
  height: 18px;
}

.sns-icon:hover {
  background: var(--btn-hover);
  color: var(--text);
  transform: translateY(-2px);
}

/* ===========================
   リンクボタン
=========================== */
.links {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.link-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 22px;
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--bg);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  transition: opacity 0.2s, transform 0.18s;
}

.link-btn:hover {
  opacity: 0.82;
  transform: translateY(-1px);
}

.link-btn:active { transform: translateY(0); opacity: 0.9; }

.link-icon {
  font-size: 1.05rem;
  line-height: 1;
  flex-shrink: 0;
  opacity: 0.8;
}

.link-label {
  flex: 1;
}

.link-arrow {
  width: 16px;
  height: 16px;
  opacity: 0.45;
  flex-shrink: 0;
  transition: transform 0.18s, opacity 0.18s;
}

.link-btn:hover .link-arrow {
  transform: translateX(3px);
  opacity: 0.7;
}

/* ===========================
   フッター
=========================== */
.footer {
  margin-top: 48px;
  font-size: 0.7rem;
  color: var(--btn-border);
  letter-spacing: 0.1em;
  font-weight: 300;
}