/* Account Tracker · 暖色学术风：米白纸底、墨褐正文、赭石强调，衬线标题，数字等宽。 */
:root {
  --paper: #F5EFE4; --paper-2: #FCFAF5; --tint: #EFE6D6;
  --ink: #2A231C; --ink-2: #4A4036; --muted: #7A6E61; --line: #E1D6C5; --line-2: #CFC2AE;
  --accent: #A3502A; --accent-ink: #7D3A1D; --accent-soft: #F3DCCB;
  --ochre: #8A6A2B; --ok: #4E6B3A; --ok-soft: #E4EBD8; --warn: #9A6412; --warn-soft: #F6E8C8; --bad: #9B2E2E; --bad-soft: #F2D9D5;
  --radius: 6px; --shadow: 0 1px 2px rgba(42, 35, 28, .06), 0 6px 18px -12px rgba(42, 35, 28, .25);
  --serif: "Source Serif 4", "Noto Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "SF Mono", Menlo, Consolas, "Noto Sans Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #1F1A15; --paper-2: #28221C; --tint: #322A22; --ink: #EEE6D8; --ink-2: #D6CBB9; --muted: #A89B8A; --line: #3E342A; --line-2: #55483B;
    --accent: #D98A62; --accent-ink: #F0B998; --accent-soft: #4A2E1F; --ok: #9DBE84; --ok-soft: #2B3A22; --warn: #D9A94C; --warn-soft: #3F3218; --bad: #E08A82; --bad-soft: #4A2724;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 18px -12px rgba(0, 0, 0, .6);
  }
}
:root[data-theme="dark"] {
  --paper: #1F1A15; --paper-2: #28221C; --tint: #322A22; --ink: #EEE6D8; --ink-2: #D6CBB9; --muted: #A89B8A; --line: #3E342A; --line-2: #55483B;
  --accent: #D98A62; --accent-ink: #F0B998; --accent-soft: #4A2E1F; --ok: #9DBE84; --ok-soft: #2B3A22; --warn: #D9A94C; --warn-soft: #3F3218; --bad: #E08A82; --bad-soft: #4A2724;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 18px -12px rgba(0, 0, 0, .6);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 15px; line-height: 1.6; font-variant-numeric: tabular-nums; }
a { color: var(--accent-ink); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 45%, transparent); text-underline-offset: 2px; }
a:hover { text-decoration-color: var(--accent); }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 600; letter-spacing: .005em; color: var(--ink); margin: 0 0 10px; line-height: 1.25; }
h1 { font-size: 28px; } h2 { font-size: 20px; } h3 { font-size: 17px; }
p { margin: 0 0 12px; }
small, .small { font-size: 13px; color: var(--muted); }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: .95em; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; background: var(--paper-2); padding: 8px 12px; z-index: 100; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.wrap.narrow { max-width: 560px; }

/* 报头 */
.masthead { border-bottom: 1px solid var(--line-2); background: var(--paper); }
.masthead .wrap { display: flex; align-items: baseline; gap: 22px; padding: 18px 20px 14px; flex-wrap: wrap; }
.wordmark { font-family: var(--serif); font-size: 21px; font-weight: 600; letter-spacing: .06em; color: var(--ink); text-decoration: none; display: inline-flex; align-items: baseline; gap: 10px; }
.wordmark .rule { display: inline-block; width: 26px; height: 2px; background: var(--accent); transform: translateY(-5px); }
.wordmark small { font-family: var(--sans); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
.masthead nav { margin-left: auto; display: flex; align-items: center; gap: 18px; font-size: 14px; }
.masthead nav a { color: var(--ink-2); text-decoration: none; padding-bottom: 2px; border-bottom: 1.5px solid transparent; }
.masthead nav a[aria-current], .masthead nav a:hover { border-bottom-color: var(--accent); color: var(--ink); }
.masthead nav form { display: inline; }
.masthead nav button { background: none; border: 0; padding: 0; font: inherit; color: var(--ink-2); cursor: pointer; border-bottom: 1.5px solid transparent; }
.masthead nav button:hover { border-bottom-color: var(--accent); color: var(--ink); }
.masthead .who { color: var(--muted); font-size: 13px; }

main { padding: 30px 0 60px; }
.page-head { margin-bottom: 20px; }
.page-head .eyebrow { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); font-weight: 600; margin-bottom: 6px; }
.page-head .lead { color: var(--ink-2); max-width: 70ch; }

/* 栅格与卡片 */
.grid { display: grid; gap: 20px; }
.grid-main { grid-template-columns: minmax(0, 1fr) 340px; align-items: start; }
@media (max-width: 880px) { .grid-main { grid-template-columns: 1fr; } }
.card { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; box-shadow: var(--shadow); }
.card + .card { margin-top: 18px; }
.card h2, .card h3 { margin-top: 0; }
.card.flush { padding: 0; overflow: hidden; }
.card.flush > header { padding: 14px 20px; border-bottom: 1px solid var(--line); display: flex; align-items: baseline; gap: 12px; }
.card.flush > header h3 { margin: 0; }
.card.accent { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }

/* 摘要数字条 */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper-2); margin-bottom: 20px; overflow: hidden; }
.stats > div { padding: 14px 18px; border-right: 1px solid var(--line); }
.stats > div:last-child { border-right: 0; }
.stats .k { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.stats .v { font-family: var(--serif); font-size: 24px; color: var(--ink); line-height: 1.2; margin-top: 2px; }
.stats .v small { font-family: var(--sans); font-size: 12px; margin-left: 4px; }

/* 表格 */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th { text-align: left; font-weight: 600; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); padding: 10px 14px; border-bottom: 1px solid var(--line-2); background: var(--tint); white-space: nowrap; }
.table td { padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
.table tbody tr:last-child td { border-bottom: 0; }
.table td.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
.table th.num { text-align: right; }
.table .ref { font-family: var(--mono); font-size: 13px; white-space: nowrap; }
.table td.nw { white-space: nowrap; }
.scroll .table { min-width: 600px; }
.scroll { overflow-x: auto; }

/* 状态标签 */
.tag { display: inline-block; padding: 1px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; letter-spacing: .02em; border: 1px solid transparent; white-space: nowrap; }
.tag.submitted { background: var(--warn-soft); color: var(--warn); }
.tag.approved { background: var(--ok-soft); color: var(--ok); }
.tag.paying { background: var(--accent-soft); color: var(--accent-ink); }
.tag.paid { background: var(--ok-soft); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 35%, transparent); }
.tag.rejected { background: var(--bad-soft); color: var(--bad); }
.tag.withdrawn { background: var(--tint); color: var(--muted); }
.tag.warn { background: var(--bad-soft); color: var(--bad); }
.tag.info { background: var(--tint); color: var(--ink-2); }

/* 表单 */
.field { margin-bottom: 14px; }
.field label, .field .label { display: block; font-size: 13px; font-weight: 600; color: var(--ink-2); margin-bottom: 5px; }
.field label .opt { font-weight: 400; color: var(--muted); }
.field .hint { font-size: 12.5px; color: var(--muted); margin: 5px 0 0; }
.field-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; }
input[type="text"], input[type="email"], input[type="password"], input[type="date"], input[type="number"], select, textarea {
  width: 100%; font: inherit; font-size: 14.5px; color: var(--ink); background: var(--paper-2); border: 1px solid var(--line-2); border-radius: 4px; padding: 8px 10px;
}
input:focus, select:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--accent) 35%, transparent); outline-offset: 1px; border-color: var(--accent); }
textarea { min-height: 84px; resize: vertical; }
input[type="file"] { font: inherit; font-size: 13.5px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 13.5px; color: var(--ink-2); margin: 10px 0 16px; }
.check input { margin-top: 4px; }
.hp { position: absolute; left: -9999px; }
.actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 6px; }
.actions .note { font-size: 13px; color: var(--muted); }
.btn { display: inline-block; font: inherit; font-size: 14px; font-weight: 600; padding: 8px 18px; border-radius: 4px; border: 1px solid var(--accent); background: var(--accent); color: #FFF8F0; cursor: pointer; text-decoration: none; letter-spacing: .01em; }
.btn:hover { background: var(--accent-ink); border-color: var(--accent-ink); }
.btn.ghost { background: transparent; color: var(--accent-ink); }
.btn.ghost:hover { background: var(--accent-soft); }
.btn.small { font-size: 13px; padding: 5px 12px; }
.btn.danger { border-color: color-mix(in srgb, var(--bad) 55%, transparent); color: var(--bad); background: transparent; }
.btn.danger:hover { background: var(--bad-soft); }
.btn:disabled { opacity: .6; cursor: default; }
.linkbtn { background: none; border: 0; padding: 0; font: inherit; color: var(--accent-ink); text-decoration: underline; cursor: pointer; }

/* 提示 */
.notice { border-left: 3px solid var(--accent); background: var(--paper-2); padding: 10px 14px; border-radius: 0 var(--radius) var(--radius) 0; margin: 0 0 18px; font-size: 14px; }
.notice.ok { border-left-color: var(--ok); }
.notice.error { border-left-color: var(--bad); color: var(--bad); }
.steps { margin: 0; padding-left: 18px; color: var(--ink-2); font-size: 14px; }
.steps li { margin-bottom: 6px; }
dl.kv { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; margin: 0; font-size: 14px; }
dl.kv dt { color: var(--muted); }
dl.kv dd { margin: 0; }

.site-footer { border-top: 1px solid var(--line-2); padding: 20px 0 40px; color: var(--muted); font-size: 13px; }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* 后台 */
.adm main { padding-top: 0; }
.adm .wrap { max-width: 1560px; }
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--line-2); margin: 0 0 22px; position: sticky; top: 0; background: var(--paper); z-index: 10; padding-top: 10px; }
.tabs a { padding: 8px 16px; text-decoration: none; color: var(--ink-2); border: 1px solid transparent; border-bottom: 0; border-radius: var(--radius) var(--radius) 0 0; font-size: 14px; font-weight: 500; margin-bottom: -1px; }
.tabs a[aria-current] { background: var(--paper-2); border-color: var(--line-2); color: var(--ink); }
.tabs a .cnt { display: inline-block; min-width: 18px; padding: 0 6px; margin-left: 6px; border-radius: 999px; background: var(--accent); color: #FFF8F0; font-size: 11.5px; text-align: center; }
.tabs .spacer { flex: 1; }
.tabs .right { font-size: 13px; color: var(--muted); align-self: center; padding-bottom: 6px; }
.tabs .right a { padding: 0; margin-left: 14px; border: 0; color: var(--accent-ink); text-decoration: underline; }
details.group { margin-bottom: 14px; }
details.group > summary { cursor: pointer; list-style: none; font-family: var(--serif); font-size: 17px; font-weight: 600; padding: 8px 0; border-bottom: 1px solid var(--line-2); display: flex; align-items: baseline; gap: 10px; }
details.group > summary::-webkit-details-marker { display: none; }
details.group > summary::before { content: "▸"; font-size: 13px; color: var(--muted); }
details.group[open] > summary::before { content: "▾"; }
details.group > summary .cnt { font-family: var(--sans); font-size: 13px; color: var(--muted); font-weight: 400; }
details.group .table { margin-top: 10px; background: var(--paper-2); border: 1px solid var(--line); }
.adm .table th { background: var(--tint); }
.adm tr.submitted td:first-child { box-shadow: inset 3px 0 0 var(--warn); }
.adm tr.paying td:first-child { box-shadow: inset 3px 0 0 var(--accent); }
.adm tr.approved td:first-child { box-shadow: inset 3px 0 0 var(--ok); }
.adm .ops { min-width: 470px; }
.adm td.content { max-width: 380px; }
.adm details.inl > summary { white-space: nowrap; }
.adm .scroll .table { min-width: 1180px; }
.op { display: grid; grid-template-columns: 72px 1fr; gap: 6px 10px; align-items: center; margin-top: 8px; font-size: 13px; }
.op:first-child { margin-top: 0; }
.op > span { color: var(--muted); }
.op form { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; margin: 0; }
.op input[type="text"], .op input[type="number"], .op input[type="date"], .op select { width: auto; font-size: 13px; padding: 4px 8px; }
.op label { display: inline-flex; gap: 4px; align-items: center; white-space: nowrap; color: var(--muted); font-size: 12.5px; }
.op .note { font-size: 12.5px; color: var(--muted); }
.op .btn { font-size: 13px; padding: 4px 12px; }
.adm pre { white-space: pre-wrap; font-size: 12px; margin: 4px 0; color: var(--ink-2); font-family: var(--mono); }
.adm details.inl > summary { cursor: pointer; font-size: 12.5px; color: var(--accent-ink); }
.foot { margin-top: 24px; font-size: 12.5px; color: var(--muted); }
details.ops { margin-top: 6px; }
details.ops > summary { list-style: none; cursor: pointer; font-size: 13px; color: var(--accent-ink); user-select: none; display: inline-flex; align-items: center; gap: 4px; }
details.ops > summary::-webkit-details-marker { display: none; }
details.ops > summary::after { content: "▾"; font-size: 11px; }
details.ops[open] > summary::after { content: "▴"; }

@media (max-width: 600px) {
  .masthead .wrap { gap: 10px 16px; }
  .masthead nav { margin-left: 0; width: 100%; gap: 14px; }
  h1 { font-size: 24px; }
  .card { padding: 16px; }
}