:root {
  --bg: #fafafa;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --card: #fff;
  --border: #e2e2e2;
  --accent: #c81818;
  --accent-fg: #fff;
  --shadow: 0 1px 2px rgba(0,0,0,.06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16181c;
    --fg: #ececec;
    --muted: #9aa0a6;
    --card: #1f2226;
    --border: #2c3036;
    --accent: #e23a3a;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--fg);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  padding-bottom: 4rem;
}
main { max-width: 1200px; margin: 0 auto; padding: 1rem; }
h1 { font-size: 1.4rem; margin: 0 0 .5rem; }
h2 { font-size: 1.1rem; margin: 0 0 .5rem; }
.muted { color: var(--muted); }
.error { color: var(--accent); background: rgba(200,24,24,.08); padding: .6rem .8rem; border-radius: 6px; }
code { background: rgba(127,127,127,.1); padding: 0 .25em; border-radius: 3px; }

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: .7rem 1rem; border-bottom: 1px solid var(--border);
  background: var(--card); position: sticky; top: 0; z-index: 10;
}
.topbar .brand { font-weight: 700; color: var(--accent); text-decoration: none; }
.topbar nav { display: flex; gap: 1rem; align-items: center; }
.topbar a { color: var(--fg); text-decoration: none; }
.inline { display: inline; margin: 0; }
.linklike { background: none; border: 0; color: var(--fg); cursor: pointer; font: inherit; padding: 0; }

footer { text-align: center; color: var(--muted); margin-top: 2rem; padding: 1rem; }

.quick-search input[type="search"] {
  display: block; width: 100%; box-sizing: border-box;
  padding: .8rem 1rem; font-size: 1.1rem;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--card); color: var(--fg);
  margin: 1rem 0 .5rem;
}

.table-wrap {
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--card);
}
.data { border-collapse: collapse; width: 100%; min-width: 640px; }
.data thead th {
  position: sticky; top: 0; z-index: 2;
  background: var(--card);
  text-align: left; padding: .55rem .7rem .6rem;
  font-weight: 600; font-size: .9rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.data thead th .th-label,
.data thead th .th-sort {
  color: var(--muted); font-weight: 600; font-size: .8rem;
  text-transform: uppercase; letter-spacing: .03em;
  display: inline-flex; align-items: center; gap: .15rem;
  margin-bottom: .25rem;
}
.data thead th .th-sort {
  background: transparent; border: 0; padding: 0; cursor: pointer; font-family: inherit;
}
.data thead th .th-sort:hover { color: var(--fg); }
.data thead th .th-sort .sort-icon { font-size: .75rem; min-width: .8em; }
.data thead th input[type="search"] {
  display: block; width: 100%; box-sizing: border-box;
  padding: .3rem .5rem; font: inherit; font-size: .9rem;
  border: 1px solid var(--border); border-radius: 4px;
  background: var(--bg); color: var(--fg);
}
.data tbody td {
  padding: .55rem .7rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.data tbody tr:last-child td { border-bottom: 0; }
.data tbody tr:hover { background: rgba(127,127,127,.06); }
.data tbody a { color: inherit; text-decoration: none; font-weight: 500; }
.data tbody a:hover { color: var(--accent); }
.data .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.data .ts { font-variant-numeric: tabular-nums; white-space: nowrap; font-size: .85rem; color: var(--muted); }
.data .actions { width: 2.6rem; text-align: center; }
.data .row-delete {
  background: transparent; color: var(--muted);
  border: 1px solid var(--border); border-radius: 6px;
  width: 2rem; height: 2rem; padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background 120ms, color 120ms, border-color 120ms;
}
.data .row-delete:hover { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.data .row-delete svg { display: block; }
.center { text-align: center; }

.notice { background: rgba(34,139,34,.1); color: #228b22; padding: .6rem .8rem; border-radius: 6px; margin: 1rem 0; }
.small { font-size: .85rem; }
.danger-form { margin-top: 1.5rem; }
.danger-zone summary { cursor: pointer; color: var(--accent); font-weight: 600; padding: .2rem 0; }
.danger-zone > details[open] > summary { margin-bottom: .6rem; }

.detail { display: grid; grid-template-columns: 8rem 1fr; gap: .3rem .8rem; margin: 1rem 0; }
.detail dt { color: var(--muted); }
.detail dd { margin: 0; }

button, .button {
  background: var(--accent); color: var(--accent-fg); border: 0;
  padding: .55rem 1rem; border-radius: 6px; font: inherit; cursor: pointer;
  text-decoration: none; display: inline-block;
}
button.danger { background: #6b6b6b; }
button:hover, .button:hover { filter: brightness(1.05); }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 1rem; margin: 1rem 0; box-shadow: var(--shadow); }

.login, .item-form, .upload { display: flex; flex-direction: column; gap: .6rem; max-width: 32rem; }
.login label, .item-form label { display: flex; flex-direction: column; gap: .2rem; }
.login input, .item-form input, .upload input {
  padding: .5rem .7rem; border: 1px solid var(--border); border-radius: 6px;
  background: var(--bg); color: var(--fg); font: inherit;
}
.mode { display: flex; flex-direction: column; gap: .3rem; border: 1px solid var(--border); padding: .6rem .8rem; border-radius: 6px; }
.mode legend { padding: 0 .3rem; color: var(--muted); }

.items { width: 100%; border-collapse: collapse; font-size: .9rem; }
.items th, .items td { text-align: left; padding: .4rem .5rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.items th { color: var(--muted); font-weight: 500; }
.items summary { cursor: pointer; font-weight: 600; }

.result-stats { list-style: none; padding: 0; }
.result-stats li { padding: .25rem 0; border-bottom: 1px dashed var(--border); }