/* 日本珍拾得物センター — 1色（藍）+ 無彩色の引き算デザイン */

:root {
  --color-primary: #33518e;
  --color-primary-strong: #27406f;
  --color-bg: #f2f0ea;
  --color-surface: #ffffff;
  --color-paper: #fbf8ef;
  --color-paper-edge: #e5ddc8;
  --color-paper-hole: #d7cdab;
  --color-text: #2b2b2b;
  --color-text-muted: #6b6b6b;
  --color-line: #e4e4e0;
  --shadow-card: 0 2px 6px rgba(60, 50, 20, 0.10);
  --z-header: 100;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #8ba7dd;
    --color-primary-strong: #a9bfe8;
    --color-bg: #16171a;
    --color-surface: #1f2024;
    --color-paper: #26241d;
    --color-paper-edge: #3b372a;
    --color-paper-hole: #4c4633;
    --color-text: #e6e6e4;
    --color-text-muted: #9a9a97;
    --color-line: #2e2f34;
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ヘッダー */
.site-header {
  background: var(--color-primary);
  color: #fff;
  padding: 28px 0 24px;
}

.site-title {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.06em;
}

.site-title a {
  color: inherit;
  text-decoration: none;
}

.site-tagline {
  margin: 6px 0 0;
  font-size: 13px;
  opacity: 0.85;
}

/* セクション */
.section-heading {
  font-size: 16px;
  color: var(--color-text-muted);
  font-weight: 600;
  letter-spacing: 0.08em;
  margin: 40px 0 16px;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.pref-filter select {
  font-size: 14px;
  padding: 4px 8px;
  border: 1px solid var(--color-line);
  border-radius: 6px;
  background: var(--color-surface);
  color: var(--color-text);
}

/* カード = 拾得物件票（荷札）。机に散らばった落とし物のように配置する */
.card-list {
  display: flex;
  flex-direction: column;
  gap: 26px;
}

.item-card {
  width: min(100%, 540px);
  background: var(--color-paper);
  border: 1px solid var(--color-paper-edge);
  border-radius: 3px;
  box-shadow: var(--shadow-card);
  padding: 16px 20px 14px;
  position: relative;
  transform: rotate(-1.1deg);
  transition: transform 200ms ease;
}

/* 互い違いに置く。傾きは3枚周期でわずかに変える */
.card-list .item-card:nth-child(2n) {
  margin-left: auto;
  transform: rotate(1.2deg);
}

.card-list .item-card:nth-child(3n) {
  transform: rotate(0.5deg);
}

/* 手に取ると水平に戻る */
.item-card:hover {
  transform: rotate(0deg);
}

/* 荷札の穴（ハトメ） */
.item-card::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 16px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-paper-hole);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.18);
}

.item-meta {
  font-size: 12.5px;
  color: var(--color-text-muted);
  margin: 0 0 6px 30px;
  letter-spacing: 0.05em;
  border-bottom: 1px dashed var(--color-paper-edge);
  padding-bottom: 6px;
}

.item-name {
  margin: 4px 0 6px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
}

.item-body {
  margin: 0;
  font-size: 15px;
}

.item-contact {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--color-text-muted);
}

.item-actions {
  margin-top: 10px;
  display: flex;
  gap: 16px;
}

.item-actions a,
.item-actions button {
  font-size: 13px;
  color: var(--color-primary);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  text-decoration: none;
}

.item-actions a:hover,
.item-actions button:hover {
  text-decoration: underline;
}

/* 空状態・フッター */
.empty-state {
  color: var(--color-text-muted);
  font-size: 14px;
}

.load-more-wrap {
  text-align: center;
  margin: 24px 0 0;
}

.load-more {
  font-size: 14px;
  color: var(--color-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 8px 28px;
  cursor: pointer;
}

.site-footer {
  margin-top: 64px;
  padding: 32px 0 48px;
  border-top: 1px solid var(--color-line);
  font-size: 12.5px;
  color: var(--color-text-muted);
}

.site-footer p { margin: 4px 0; }

.site-footer a { color: var(--color-primary); }

/* 補助 */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* aboutページ */
.about-body h2 {
  font-size: 17px;
  margin: 36px 0 8px;
}

.about-body p { margin: 8px 0; }