:root {
  --bg: #f6f7f9; --fg: #1d2129; --muted: #6b7280; --card: #fff; --line: #e3e6ea;
  --accent: #b8860b; --accent-fg: #fff; --accent-soft: #fbf3dc;
  --ok: #1e8e3e; --ok-soft: #e6f4ea; --warn: #b3261e; --warn-soft: #fce8e6; --error: #c0392b;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171b; --fg: #e8eaed; --muted: #9aa0a6; --card: #1f2227; --line: #2f333a;
    --accent: #d4a62a; --accent-fg: #15171b; --accent-soft: #3a3120;
    --ok: #81c995; --ok-soft: #1f3326; --warn: #f28b82; --warn-soft: #3c2422; --error: #ff6b5b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.6 -apple-system, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}
.container { max-width: 1100px; margin: 0 auto; padding: 20px 16px 48px; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
h1 { font-size: 1.4rem; margin: 0 0 16px; line-height: 1.35; }
h2 { font-size: 1.1rem; margin: 28px 0 12px; }
.small { font-size: .85rem; }
.muted { color: var(--muted); }
.error { color: var(--error); }
.empty { color: var(--muted); padding: 24px 0; text-align: center; }
.note { white-space: pre-wrap; background: var(--accent-soft); padding: 10px 14px; border-radius: 8px; }

/* 頂部導覽 */
.topbar {
  display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: space-between; align-items: center;
  padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-weight: 700; }
.topbar nav { display: flex; gap: 4px 14px; align-items: center; flex-wrap: wrap; }
.tabs-nav a { color: var(--muted); padding: 4px 0; border-bottom: 2px solid transparent; }
.tabs-nav a.active { color: var(--fg); border-bottom-color: var(--accent); }

/* 元件 */
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; margin-bottom: 16px; }
.narrow { max-width: 420px; margin: 40px auto; }
.flash { padding: 10px 14px; margin-bottom: 16px; border-radius: 8px; background: var(--accent-soft); border: 1px solid var(--accent); }
.tag { display: inline-block; font-size: .75rem; padding: 1px 8px; border-radius: 99px; background: var(--bg); border: 1px solid var(--line); color: var(--muted); margin-right: 6px; }
.tag.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.tag.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.grade { display: inline-block; min-width: 2.4em; text-align: center; font-weight: 800; font-size: 1.1rem; padding: 2px 10px; border-radius: 8px; background: var(--accent); color: var(--accent-fg); }
.grade.pending { font-weight: 500; font-size: .8rem; background: var(--bg); color: var(--muted); border: 1px solid var(--line); }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.row-between h1, .row-between h2 { margin-bottom: 8px; }

/* 表單 */
label { display: block; font-size: .9rem; color: var(--muted); }
input, select, textarea {
  display: block; width: 100%; margin-top: 4px; padding: 9px 12px; font: inherit; font-size: 1rem;
  border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--fg);
}
input:disabled { opacity: .6; }
label.check { display: flex; align-items: center; gap: 8px; color: var(--fg); }
label.check input { width: auto; margin: 0; }
.stack label { margin-bottom: 14px; }
.grid-form { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px 16px; align-items: end; }
.grid-form .full { grid-column: 1 / -1; }
.actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
button, .btn {
  display: inline-block; padding: 9px 18px; font: inherit; font-size: 1rem; font-weight: 600; cursor: pointer;
  border: 1px solid var(--accent); border-radius: 8px; background: var(--accent); color: var(--accent-fg); text-align: center;
}
.btn:hover { color: var(--accent-fg); opacity: .9; }
button.secondary, .btn.secondary { background: transparent; color: var(--fg); border-color: var(--line); }
button.danger { background: transparent; color: var(--warn); border-color: var(--warn); }
button.link { padding: 0; background: none; border: 0; color: var(--muted); font-weight: 400; }
button.link:hover { color: var(--accent); }
.small-btn { padding: 3px 10px; font-size: .85rem; }
.narrow button, .stack button { width: 100%; }
form.inline { display: inline; margin: 0; }
.danger-zone { margin-top: 20px; padding-top: 16px; border-top: 1px dashed var(--line); display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.photo-preview { display: flex; gap: 16px; align-items: center; }
.photo-preview img { height: 120px; border-radius: 6px; }
.credential { display: grid; grid-template-columns: auto 1fr; gap: 8px 16px; background: var(--bg); padding: 14px; border-radius: 8px; }
.credential dt { color: var(--muted); }
.credential dd { margin: 0; word-break: break-all; }
.credential code { font-size: 1.15rem; font-weight: 700; }

/* 統計 */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; display: flex; flex-direction: column; }
.stat .num { font-size: 1.6rem; font-weight: 700; }
.stat.alert .num { color: var(--warn); }

/* 表格 */
.table-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 500; white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; white-space: nowrap; }
tr.disabled td { opacity: .55; }
.thumb-cell img { width: 40px; height: 56px; object-fit: cover; border-radius: 4px; display: block; }

/* 前台：分段、篩選 */
.seg { display: flex; gap: 6px; margin-bottom: 12px; overflow-x: auto; }
.seg a { padding: 6px 14px; border-radius: 99px; border: 1px solid var(--line); background: var(--card); white-space: nowrap; color: var(--muted); }
.seg a.active { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); }
.seg .count { font-size: .8rem; opacity: .8; }
.filters { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.filters select { width: auto; flex: 1 1 160px; margin: 0; }
.filters button { flex: 0 0 auto; }

/* 前台：卡片列表 */
.card-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
@media (min-width: 900px) { .card-list { grid-template-columns: 1fr 1fr; } }
.item { display: flex; gap: 14px; padding: 12px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; height: 100%; color: var(--fg); }
.item:hover { border-color: var(--accent); color: var(--fg); }
.item .thumb { flex: 0 0 64px; height: 90px; border-radius: 6px; overflow: hidden; background: var(--bg); display: flex; align-items: center; justify-content: center; font-size: .7rem; color: var(--muted); }
.item .thumb img { width: 100%; height: 100%; object-fit: cover; }
.item .info { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.item .name { font-weight: 600; line-height: 1.35; overflow-wrap: anywhere; }
.item .side { flex: 0 0 auto; display: flex; flex-direction: column; align-items: flex-end; justify-content: space-between; gap: 6px; text-align: right; }
.big-num { font-size: 1.6rem; font-weight: 700; line-height: 1; }
.progress { display: flex; flex-direction: column; gap: 2px; margin-top: 4px; }
progress { width: 100%; max-width: 260px; height: 6px; appearance: none; border: 0; border-radius: 99px; background: var(--line); overflow: hidden; }
progress::-webkit-progress-bar { background: var(--line); border-radius: 99px; }
progress::-webkit-progress-value { background: var(--accent); border-radius: 99px; }
progress::-moz-progress-bar { background: var(--accent); border-radius: 99px; }

/* 前台：卡片詳情 */
.detail { display: grid; gap: 20px; margin-bottom: 20px; }
@media (min-width: 760px) { .detail { grid-template-columns: minmax(0, 360px) 1fr; } }
.detail .photo img { width: 100%; border-radius: 10px; display: block; }
.no-photo { aspect-ratio: 5 / 7; background: var(--card); border: 1px dashed var(--line); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: var(--muted); }
.grade-big .grade { font-size: 2rem; padding: 4px 18px; }
.grade-big { margin-bottom: 12px; }
.facts dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; margin: 0; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; overflow-wrap: anywhere; }
.facts dd a { color: var(--accent); }
.steps { list-style: none; margin: 0; padding: 0; }
.steps li { display: flex; gap: 12px; position: relative; padding-bottom: 14px; }
.steps li:not(:last-child)::before { content: ""; position: absolute; left: 6px; top: 16px; bottom: 0; width: 2px; background: var(--line); }
.steps li.done:not(:last-child)::before { background: var(--accent); }
.steps .dot { flex: 0 0 14px; height: 14px; margin-top: 5px; border-radius: 50%; border: 2px solid var(--line); background: var(--card); position: relative; z-index: 1; }
.steps li.done .dot { background: var(--accent); border-color: var(--accent); }
.steps li.current .dot { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.steps li.current { font-weight: 700; }
.steps li.todo { color: var(--muted); }

/* 付款明細 */
.plain-list { list-style: none; padding: 0; margin: 0; background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
.plain-list li { display: flex; gap: 10px; align-items: baseline; padding: 10px 14px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.plain-list li:last-child { border-bottom: 0; }
.plain-list li a { flex: 1 1 200px; }
.plain-list .num { margin-left: auto; font-weight: 600; }

/* 首頁 */
.hero { text-align: center; padding: 64px 0 32px; }
.hero h1 { font-size: 2rem; }
.hero .lead { font-size: 1.15rem; margin: 0 0 8px; }
.hero .btn { margin-top: 20px; padding: 12px 32px; }

/* 分組、照片 */
.group { margin-bottom: 24px; }
.group-head h2, .group-head h3 { margin: 0 0 8px; font-size: 1.05rem; }
.mt0 { margin-top: 0; }
.active-filter { color: var(--accent); font-weight: 700; }
.photo-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 6px; }
.photo-tile { display: flex; flex-direction: column; align-items: center; gap: 4px; color: var(--fg); }
.photo-tile img { height: 120px; border-radius: 6px; display: block; }
.photo-tile .check { display: flex; gap: 4px; align-items: center; font-size: .85rem; }
.photo-tile .check input { width: auto; margin: 0; }
.gallery { display: flex; gap: 8px; margin-top: 10px; overflow-x: auto; }
.gallery img { height: 84px; border-radius: 6px; display: block; }
.filters input { width: auto; flex: 2 1 200px; margin: 0; }