:root {
  --bg: #FFF9F0;
  --card: #FFFFFF;
  --ink: #1A1A1A;
  --sub: #6B6558;
  --border: #ECE4D4;
  --amazon: #FF9900;
  --rakuten: #BF0000;
  --mercari: #FF0211;
  --yahoo: #FF0033;
  --rakuma: #E4007F;
  --paypayfleamarket: #EE0000;
  --jmty: #FF6D00;
  --yahooshopping: #E2001A;
  --aupay: #E60012;
  --qoo10: #FF5000;
  --surugaya: #6A1B9A;
  --bookoff: #FDB913;
  --janpara: #0072BC;
  --kakaku: #0095D9;
  --accent: #2E7D5B;
  --shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1a17;
    --card: #262320;
    --ink: #f2ede4;
    --sub: #b3aa99;
    --border: #3a352e;
  }
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  overscroll-behavior: none;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Sans", "Yu Gothic", "Meiryo", system-ui, sans-serif;
  font-weight: 700;
  padding: 24px 16px;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 640px;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 20px;
}

.title {
  font-size: 32px;
  font-weight: 900;
  letter-spacing: -0.5px;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.title .emoji {
  font-size: 34px;
}

.subtitle {
  font-size: 16px;
  color: var(--sub);
  margin-top: 8px;
  font-weight: 700;
}

.search-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 20px;
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}

.search-row {
  display: flex;
  gap: 10px;
}

input#kw {
  flex: 1;
  font-size: 20px;
  font-weight: 700;
  padding: 16px 18px;
  border-radius: 14px;
  border: 2px solid var(--border);
  background: var(--bg);
  color: var(--ink);
  outline: none;
  min-width: 0;
}

input#kw:focus {
  border-color: var(--accent);
}

.go-btn {
  font-size: 18px;
  font-weight: 900;
  padding: 0 22px;
  border-radius: 14px;
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  white-space: nowrap;
}

.go-btn:active {
  transform: scale(0.97);
}

.hint {
  font-size: 14px;
  color: var(--sub);
  margin-top: 12px;
  font-weight: 700;
}

.site-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.site-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px 6px;
  border-radius: 12px;
  border: none;
  color: #fff;
  font-size: 14px;
  font-weight: 900;
  cursor: pointer;
  box-shadow: var(--shadow);
  text-align: center;
  line-height: 1.3;
}

.site-btn:active {
  transform: scale(0.97);
}

.category-title {
  font-size: 18px;
  font-weight: 900;
  margin: 24px 4px 12px;
}

.amazon { background: var(--amazon); }
.rakuten { background: var(--rakuten); }
.mercari { background: var(--mercari); }
.yahoo { background: var(--yahoo); }
.rakuma { background: var(--rakuma); }
.paypayfleamarket { background: var(--paypayfleamarket); }
.jmty { background: var(--jmty); }
.yahooshopping { background: var(--yahooshopping); }
.aupay { background: var(--aupay); }
.qoo10 { background: var(--qoo10); }
.surugaya { background: var(--surugaya); }
.bookoff { background: var(--bookoff); color: #1A1A1A; }
.janpara { background: var(--janpara); }
.kakaku { background: var(--kakaku); }

.status {
  text-align: center;
  font-size: 14px;
  color: var(--sub);
  margin-top: 14px;
  font-weight: 700;
  min-height: 18px;
}

.popup-warn {
  background: #FFF3E0;
  border: 2px solid #FFB74D;
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 14px;
  color: #8A5A00;
  margin-top: 14px;
  display: none;
  font-weight: 700;
}