:root {
  --bg: #f6f5f1; --card: #fff; --ink: #1f2328; --muted: #646b73; --line: #dcdad3; --soft: #f1f0eb;
  --accent: #1f6f5c; --accent-ink: #fff; --accent-soft: #e6f2ee;
  --warn: #fff3cf; --warn-line: #e5c25a; --warn-ink: #7a5300;
  --bad: #fdeaea; --bad-ink: #9b1c1c; --ok: #1f6f5c;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.5 "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", system-ui, sans-serif; }
[hidden] { display: none !important; }
button { font: inherit; border: 0; border-radius: 8px; padding: 8px 16px; background: var(--accent); color: var(--accent-ink); cursor: pointer; }
button.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
button.link { background: none; color: var(--accent); padding: 2px 4px; }
button[disabled] { opacity: .4; cursor: not-allowed; }
input, select, textarea { font: inherit; color: inherit; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.err { color: var(--bad-ink); min-height: 1.5em; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 14px; }
h2 { font-size: 16px; margin: 0 0 10px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-top: 12px; }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(360px, 100%); display: grid; gap: 10px; }
.login-card h1 { margin: 0; font-size: 22px; }
.login-card input { padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px; }

/* header */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center;
  padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; }
.date input { padding: 4px 8px; border: 1px solid var(--line); border-radius: 6px; }
.steps { display: flex; gap: 6px; margin-left: auto; flex-wrap: wrap; }
.steps button { background: var(--soft); color: var(--ink); }
.steps button.on { background: var(--accent); color: var(--accent-ink); }
.badge { display: inline-block; min-width: 20px; padding: 0 6px; border-radius: 10px; background: var(--warn-line); color: #3d2c00; font-size: 12px; }
main { max-width: 1400px; margin: 0 auto; padding: 18px 16px 60px; }

/* step 1 */
.drop { border: 2px dashed var(--line); border-radius: 10px; padding: 26px 16px; text-align: center; background: var(--card); cursor: pointer; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.small-drop { padding: 16px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; margin-top: 14px; }
.pcard { background: var(--card); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; display: flex; flex-direction: column; }
.pcard img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: var(--soft); cursor: zoom-in; }
.pcard .body { padding: 10px; display: grid; gap: 4px; }
.pcard .name { font-weight: 600; }
.pcard .st { font-size: 13px; color: var(--muted); }
.pcard .st.ok { color: var(--ok); }
.pcard .st.bad { color: var(--bad-ink); }
.pcard .acts { display: flex; gap: 4px; flex-wrap: wrap; }
.bar { height: 4px; background: var(--soft); border-radius: 2px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--accent); width: 0; transition: width .4s; }

/* step 2 */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 12px; }
.tabs button { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.tabs button.on { border-color: var(--accent); box-shadow: inset 0 -3px 0 var(--accent); }
.tabs button.done::after { content: " ✓"; color: var(--ok); }
.tabs button.missing { color: var(--muted); border-style: dashed; }
.review { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 14px; align-items: start; }
@media (max-width: 980px) { .review { grid-template-columns: 1fr; } }
.photo { position: sticky; top: 70px; background: var(--card); border: 1px solid var(--line); border-radius: 10px; overflow: auto; max-height: calc(100vh - 90px); }
.photo img { display: block; width: 100%; cursor: zoom-in; }
.photo.zoom img { width: 220%; max-width: none; cursor: zoom-out; }
.photo .hint { position: sticky; left: 0; top: 0; padding: 4px 8px; font-size: 12px; background: rgba(255,255,255,.9); color: var(--muted); }
.edit { display: grid; gap: 14px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 8px 12px; }
.fld { display: grid; gap: 2px; font-size: 13px; color: var(--muted); }
.fld input, .fld select { padding: 5px 7px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); background: #fff; width: 100%; }
.tbl { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 14px; }
th, td { border: 1px solid var(--line); padding: 3px 5px; vertical-align: middle; }
th { background: var(--soft); font-weight: 600; text-align: left; white-space: nowrap; }
td.num { text-align: right; white-space: nowrap; }
td input, td select { width: 100%; min-width: 60px; padding: 4px 5px; border: 1px solid transparent; border-radius: 4px; background: transparent; }
td input:focus, td select:focus { border-color: var(--accent); background: #fff; outline: none; }
td input.n { text-align: right; min-width: 56px; }
td.code input { min-width: 150px; }
td select { min-width: 150px; }
details summary { cursor: pointer; }
tr.itemstart td { border-top: 2px solid #b9b6ad; }
.flag { background: var(--warn) !important; box-shadow: inset 0 0 0 1px var(--warn-line); }
.flag.fixed { background: var(--accent-soft) !important; box-shadow: none; }
.alts { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 2px; }
.alt { font-size: 12px; padding: 0 6px; border-radius: 10px; background: #fff; color: var(--warn-ink); border: 1px solid var(--warn-line); cursor: pointer; }
.tag { font-size: 11px; padding: 0 5px; border-radius: 8px; background: #ffe4cc; color: #8a3b00; white-space: nowrap; }
.chk-ok { color: var(--ok); font-weight: 600; }
.chk-bad { color: var(--bad-ink); font-weight: 600; }
.qs { margin: 0; padding-left: 0; list-style: none; display: grid; gap: 6px; }
.qs li { display: flex; gap: 8px; align-items: flex-start; padding: 6px 8px; border-radius: 6px; background: var(--warn); }
.qs li.done { background: var(--soft); color: var(--muted); }
.qs input { margin-top: 4px; }
.done-bar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* step 3 */
.msg { border-radius: 8px; padding: 10px 12px; margin: 10px 0; }
.msg.bad { background: var(--bad); color: var(--bad-ink); }
.msg.warn { background: var(--warn); color: var(--warn-ink); }
.msg.ok { background: var(--accent-soft); color: var(--ok); }
.msg ul { margin: 6px 0 0; padding-left: 20px; }
.sheetprev h3 { font-size: 15px; margin: 4px 0 6px; }
.sheetprev td.sum, .sheetprev tr.sum td { background: #f7f6f1; font-weight: 600; }
.sheetprev td { white-space: nowrap; }
.sheetprev .rown { color: var(--muted); text-align: right; }

/* viewer */
.viewer { position: fixed; inset: 0; z-index: 20; background: rgba(20,20,20,.88); overflow: auto; cursor: zoom-out; padding: env(safe-area-inset-top, 0px) 0 env(safe-area-inset-bottom, 0px); }
.viewer img { display: block; max-width: none; width: 160%; margin: 0 auto; }
@media (max-width: 700px) { .viewer img { width: 260%; } }