/* 马梦轩二手书市 · 样式 */
:root {
  --bg: #f7f3ec;
  --bg-soft: #efe7db;
  --card: #ffffff;
  --card-hover: #fffdf8;
  --text: #2c2419;
  --text-soft: #6b6151;
  --text-mute: #9a9082;
  --border: #e6ddcd;
  --primary: #a6552f;      /* 赭石棕 */
  --primary-dark: #8a4326;
  --primary-soft: #f3e3d8;
  --accent: #3f6b52;       /* 墨绿 */
  --gold: #c99a3f;
  --danger: #b23b3b;
  --shadow: 0 2px 8px rgba(60,45,25,.06), 0 8px 28px rgba(60,45,25,.06);
  --shadow-lg: 0 8px 40px rgba(60,45,25,.14);
  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1160px;
}
[data-theme="dark"] {
  --bg: #17140f;
  --bg-soft: #1f1b14;
  --card: #232019;
  --card-hover: #2a261d;
  --text: #ece5d6;
  --text-soft: #b3a891;
  --text-mute: #7e7563;
  --border: #35301f;
  --primary: #d0794f;
  --primary-dark: #b8623c;
  --primary-soft: #33261d;
  --accent: #6ba585;
  --gold: #d8ad55;
  --danger: #d76b6b;
  --shadow: 0 2px 8px rgba(0,0,0,.3), 0 8px 28px rgba(0,0,0,.3);
  --shadow-lg: 0 10px 44px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 12px 18px;
  display: flex; align-items: center; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 9px; flex-shrink: 0; }
.brand-logo { font-size: 26px; }
.brand-text { font-weight: 800; font-size: 20px; letter-spacing: .5px; }
.brand-text em { font-style: normal; color: var(--primary); font-weight: 800; }
.search-wrap { flex: 1; display: flex; max-width: 520px; position: relative; }
.search-input {
  flex: 1; border: 1px solid var(--border); background: var(--card);
  border-radius: 999px; padding: 10px 44px 10px 18px; font-size: 15px; color: var(--text);
  outline: none; transition: border-color .15s, box-shadow .15s; width: 100%;
}
.search-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.search-btn {
  position: absolute; right: 5px; top: 50%; transform: translateY(-50%);
  border: none; background: transparent; font-size: 17px; padding: 6px 9px; border-radius: 50%;
}
.nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.icon-btn { border: 1px solid var(--border); background: var(--card); border-radius: 50%; width: 38px; height: 38px; font-size: 17px; display: grid; place-items: center; }
.icon-btn:hover { background: var(--card-hover); }
.user-slot { display: flex; align-items: center; gap: 8px; }
.user-chip { display: flex; align-items: center; gap: 7px; padding: 5px 12px; border-radius: 999px; background: var(--card); border: 1px solid var(--border); font-size: 14px; }
.user-chip .ava { width: 24px; height: 24px; border-radius: 50%; background: var(--primary); color: #fff; display: grid; place-items: center; font-size: 13px; font-weight: 700; }
.user-menu { position: relative; }
.user-dropdown { position: absolute; right: 0; top: calc(100% + 8px); background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-sm); box-shadow: var(--shadow-lg); min-width: 150px; overflow: hidden; }
.user-dropdown a, .user-dropdown button { display: block; width: 100%; text-align: left; padding: 11px 16px; border: none; background: none; font-size: 14px; color: var(--text); }
.user-dropdown a:hover, .user-dropdown button:hover { background: var(--bg-soft); }

/* ---------- 按钮 ---------- */
.btn { border: 1px solid var(--border); background: var(--card); color: var(--text); border-radius: 999px; padding: 9px 18px; font-size: 14px; font-weight: 600; transition: transform .08s, background .15s, box-shadow .15s; display: inline-flex; align-items: center; gap: 6px; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 3px 12px color-mix(in srgb, var(--primary) 34%, transparent); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-ghost { background: transparent; }
.btn-danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--border)); background: transparent; }
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 12%, transparent); }
.btn-block { width: 100%; justify-content: center; }
.btn-sm { padding: 6px 13px; font-size: 13px; }
.btn-sell { font-weight: 700; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* ---------- 布局 ---------- */
.app { flex: 1; max-width: var(--maxw); width: 100%; margin: 0 auto; padding: 22px 18px 60px; }
.site-footer { text-align: center; padding: 30px 18px; color: var(--text-mute); font-size: 13px; border-top: 1px solid var(--border); background: var(--bg-soft); }
.footer-sub { margin-top: 5px; font-size: 12px; opacity: .8; }

/* ---------- 首页 Hero + 筛选 ---------- */
.hero { background: linear-gradient(120deg, var(--primary-soft), color-mix(in srgb, var(--accent) 16%, var(--bg))); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 28px; margin-bottom: 22px; display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap; }
.hero h1 { margin: 0 0 6px; font-size: 24px; letter-spacing: .5px; }
.hero p { margin: 0; color: var(--text-soft); font-size: 15px; }
.hero-stats { display: flex; gap: 22px; }
.hero-stat { text-align: center; }
.hero-stat b { display: block; font-size: 24px; color: var(--primary); font-weight: 800; }
.hero-stat span { font-size: 12px; color: var(--text-mute); }

.filters { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.chip-row .label { font-size: 13px; color: var(--text-mute); margin-right: 2px; }
.chip { border: 1px solid var(--border); background: var(--card); border-radius: 999px; padding: 5px 14px; font-size: 13px; color: var(--text-soft); transition: all .12s; }
.chip:hover { border-color: var(--primary); color: var(--primary); }
.chip.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.sort-select { margin-left: auto; border: 1px solid var(--border); background: var(--card); border-radius: 999px; padding: 6px 14px; font-size: 13px; color: var(--text); }

/* ---------- 书籍网格 ---------- */
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 18px; }
.book-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: transform .14s, box-shadow .14s; cursor: pointer; display: flex; flex-direction: column; }
.book-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.book-cover { aspect-ratio: 3/4; background: var(--bg-soft); position: relative; overflow: hidden; }
.book-cover img { width: 100%; height: 100%; object-fit: cover; }
.book-cover .no-cover { width: 100%; height: 100%; display: grid; place-items: center; font-size: 40px; opacity: .3; }
.cond-badge { position: absolute; top: 8px; left: 8px; background: color-mix(in srgb, var(--accent) 92%, black); color: #fff; font-size: 11px; padding: 3px 8px; border-radius: 6px; font-weight: 600; }
.sold-cover { position: absolute; inset: 0; background: rgba(0,0,0,.5); display: grid; place-items: center; }
.sold-cover span { border: 2px solid #fff; color: #fff; font-size: 16px; font-weight: 800; padding: 4px 14px; border-radius: 8px; transform: rotate(-12deg); }
.book-info { padding: 11px 13px 13px; display: flex; flex-direction: column; gap: 4px; flex: 1; }
.book-title { font-weight: 700; font-size: 15px; line-height: 1.35; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.book-author { font-size: 12.5px; color: var(--text-mute); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.book-price-row { margin-top: auto; display: flex; align-items: baseline; gap: 7px; padding-top: 6px; }
.book-price { color: var(--primary); font-weight: 800; font-size: 19px; }
.book-price .unit { font-size: 12px; font-weight: 600; }
.book-orig { font-size: 12px; color: var(--text-mute); text-decoration: line-through; }
.book-meta { font-size: 11.5px; color: var(--text-mute); display: flex; justify-content: space-between; margin-top: 2px; }

/* ---------- 空状态 / 加载 ---------- */
.empty { text-align: center; padding: 70px 20px; color: var(--text-mute); }
.empty .big { font-size: 52px; margin-bottom: 12px; }
.empty h3 { margin: 0 0 8px; color: var(--text-soft); }
.spinner { width: 34px; height: 34px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin .8s linear infinite; margin: 60px auto; }
@keyframes spin { to { transform: rotate(360deg); } }
.pager { display: flex; justify-content: center; gap: 10px; margin-top: 28px; align-items: center; }
.pager .page-info { font-size: 14px; color: var(--text-soft); }

/* ---------- 详情页 ---------- */
.detail { display: grid; grid-template-columns: minmax(0, 420px) 1fr; gap: 32px; }
.detail-gallery { }
.gallery-main { aspect-ratio: 3/4; background: var(--bg-soft); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); }
.gallery-main img { width: 100%; height: 100%; object-fit: contain; }
.gallery-main .no-cover { width: 100%; height: 100%; display: grid; place-items: center; font-size: 72px; opacity: .25; }
.gallery-thumbs { display: flex; gap: 9px; margin-top: 11px; flex-wrap: wrap; }
.gallery-thumbs img { width: 62px; height: 62px; object-fit: cover; border-radius: 8px; border: 2px solid transparent; cursor: pointer; }
.gallery-thumbs img.active { border-color: var(--primary); }
.detail-body h1 { margin: 0 0 6px; font-size: 25px; line-height: 1.3; }
.detail-author { color: var(--text-soft); font-size: 15px; margin-bottom: 16px; }
.detail-price { display: flex; align-items: baseline; gap: 12px; margin-bottom: 18px; }
.detail-price .now { color: var(--primary); font-weight: 800; font-size: 34px; }
.detail-price .orig { color: var(--text-mute); text-decoration: line-through; font-size: 16px; }
.detail-price .off { background: var(--primary-soft); color: var(--primary); font-size: 12px; padding: 3px 9px; border-radius: 6px; font-weight: 700; }
.spec-table { border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 18px; }
.spec-row { display: flex; border-bottom: 1px solid var(--border); font-size: 14px; }
.spec-row:last-child { border-bottom: none; }
.spec-row .k { width: 96px; flex-shrink: 0; background: var(--bg-soft); padding: 9px 14px; color: var(--text-soft); }
.spec-row .v { padding: 9px 14px; }
.detail-desc { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px 18px; margin-bottom: 18px; white-space: pre-wrap; font-size: 14.5px; color: var(--text-soft); line-height: 1.75; }
.detail-desc h3, .contact-box h3 { margin: 0 0 10px; font-size: 15px; color: var(--text); }
.contact-box { background: linear-gradient(120deg, var(--primary-soft), var(--card)); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; }
.contact-line { display: flex; align-items: center; gap: 10px; font-size: 16px; margin-bottom: 8px; }
.contact-line .ct { color: var(--text-mute); font-size: 13px; width: 44px; }
.contact-val { font-weight: 700; font-size: 18px; color: var(--primary); user-select: all; }
.contact-locked { color: var(--text-soft); font-size: 14px; }
.seller-row { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; color: var(--text-soft); font-size: 14px; }
.detail-actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.back-link { display: inline-flex; align-items: center; gap: 5px; color: var(--text-soft); font-size: 14px; margin-bottom: 16px; }
.back-link:hover { color: var(--primary); }

/* ---------- 表单 / 发布 ---------- */
.page-head { margin-bottom: 22px; }
.page-head h1 { margin: 0 0 4px; font-size: 24px; }
.page-head p { margin: 0; color: var(--text-soft); font-size: 14px; }
.form-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 26px; max-width: 720px; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 20px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 13.5px; font-weight: 600; color: var(--text-soft); }
.field label .req { color: var(--danger); }
.field input, .field select, .field textarea {
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  border-radius: var(--radius-sm); padding: 10px 13px; font-size: 14.5px; outline: none; transition: border-color .15s, box-shadow .15s; font-family: inherit;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.field textarea { resize: vertical; min-height: 96px; }
.field .hint { font-size: 12px; color: var(--text-mute); }
.seg { display: flex; gap: 8px; flex-wrap: wrap; }
.seg button { border: 1px solid var(--border); background: var(--bg); color: var(--text-soft); border-radius: 999px; padding: 7px 15px; font-size: 13px; }
.seg button.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 图片上传 */
.uploader { display: flex; gap: 12px; flex-wrap: wrap; }
.upload-tile { width: 92px; height: 92px; border-radius: var(--radius-sm); border: 2px dashed var(--border); display: grid; place-items: center; color: var(--text-mute); background: var(--bg); position: relative; overflow: hidden; }
.upload-tile.add { cursor: pointer; flex-direction: column; font-size: 12px; gap: 3px; }
.upload-tile.add:hover { border-color: var(--primary); color: var(--primary); }
.upload-tile.add .plus { font-size: 24px; }
.upload-tile img { width: 100%; height: 100%; object-fit: cover; }
.upload-tile .del { position: absolute; top: 3px; right: 3px; background: rgba(0,0,0,.6); color: #fff; border: none; border-radius: 50%; width: 22px; height: 22px; font-size: 13px; display: grid; place-items: center; }
.form-actions { display: flex; gap: 12px; margin-top: 22px; }
.form-error { color: var(--danger); font-size: 13.5px; min-height: 18px; margin: 6px 0 0; }

/* ---------- 我的发布 / 管理列表 ---------- */
.list-row { display: flex; gap: 14px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px; margin-bottom: 12px; align-items: center; }
.list-row .thumb { width: 62px; height: 78px; border-radius: 7px; object-fit: cover; background: var(--bg-soft); flex-shrink: 0; }
.list-row .thumb.no { display: grid; place-items: center; font-size: 26px; opacity: .3; }
.list-row .main { flex: 1; min-width: 0; }
.list-row .main .t { font-weight: 700; font-size: 15px; }
.list-row .main .s { font-size: 13px; color: var(--text-mute); }
.list-row .price { color: var(--primary); font-weight: 800; font-size: 17px; }
.list-row .ops { display: flex; gap: 7px; flex-wrap: wrap; justify-content: flex-end; }
.status-tag { font-size: 11px; padding: 2px 8px; border-radius: 5px; font-weight: 600; }
.status-available { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }
.status-sold { background: color-mix(in srgb, var(--gold) 22%, transparent); color: var(--gold); }
.status-removed { background: color-mix(in srgb, var(--danger) 16%, transparent); color: var(--danger); }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tabs button { border: none; background: none; padding: 10px 18px; font-size: 15px; color: var(--text-soft); border-bottom: 2px solid transparent; font-weight: 600; }
.tabs button.active { color: var(--primary); border-bottom-color: var(--primary); }
.admin-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 16px; text-align: center; }
.stat-card b { display: block; font-size: 28px; color: var(--primary); font-weight: 800; }
.stat-card span { font-size: 13px; color: var(--text-mute); }

/* ---------- 模态框 / Toast ---------- */
.modal { position: fixed; inset: 0; background: rgba(20,15,8,.55); backdrop-filter: blur(3px); display: grid; place-items: center; z-index: 100; padding: 20px; }
.modal.hidden { display: none; }
.modal-card { background: var(--card); border-radius: var(--radius); padding: 28px; width: 100%; max-width: 380px; position: relative; box-shadow: var(--shadow-lg); }
.modal-close { position: absolute; top: 14px; right: 14px; border: none; background: none; font-size: 18px; color: var(--text-mute); }
.auth-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.auth-tab { flex: 1; border: 1px solid var(--border); background: var(--bg); border-radius: 999px; padding: 9px; font-size: 15px; font-weight: 600; color: var(--text-soft); }
.auth-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; font-weight: 600; color: var(--text-soft); }
.auth-form input { border: 1px solid var(--border); background: var(--bg); color: var(--text); border-radius: var(--radius-sm); padding: 11px 13px; font-size: 15px; outline: none; }
.auth-form input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.auth-hint { font-size: 12.5px; color: var(--text-mute); margin: 0; }
.toast { position: fixed; bottom: 30px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 12px 22px; border-radius: 999px; font-size: 14px; z-index: 200; box-shadow: var(--shadow-lg); transition: opacity .3s, transform .3s; }
.toast.hidden { opacity: 0; pointer-events: none; transform: translateX(-50%) translateY(10px); }

.hidden { display: none !important; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .detail { grid-template-columns: 1fr; }
  .detail-gallery { max-width: 380px; margin: 0 auto; }
}
@media (max-width: 680px) {
  .brand-text em { display: none; }
  .brand-text { font-size: 17px; }
  .topbar-inner { gap: 10px; padding: 10px 14px; flex-wrap: wrap; }
  .search-wrap { order: 3; max-width: none; width: 100%; }
  .app { padding: 16px 14px 50px; }
  .form-grid { grid-template-columns: 1fr; }
  .book-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 13px; }
  .hero { padding: 20px; }
  .hero-stats { width: 100%; justify-content: space-around; }
  .btn-sell span.txt { display: none; }
  .list-row .ops { flex-direction: column; }
}
@media (max-width: 400px) {
  .book-grid { grid-template-columns: repeat(2, 1fr); gap: 11px; }
}