:root {
  --color-primary: #ac3c19;
  --color-primary-content: #fff;
  --color-accent: #ff6b35;
  --color-base-100: #fff;
  --color-base-200: #f4f2ef;
  --color-base-300: #e8e4df;
  --color-base-content: #2b2a28;
  --color-error: #b6382b;
  --color-error-content: #fff;
  --radius-box: 0.75rem;
  --radius-field: 0.5rem;
  --radius-selector: 0.5rem;
  --depth: 0;
  --account-muted: #655e58;
  --account-ink: #1d1c1a;
  --account-tint: #fdf0e7;
  --account-width: 82rem;
  --account-gutter: clamp(1rem, 3vw, 2.5rem);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { background: var(--color-base-200); }
body {
  margin: 0;
  color: var(--color-base-content);
  font: 1rem/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
h1, h2, p, dl, dd { margin: 0; }
h1 { font-size: clamp(1.65rem, 3.2vw, 2.2rem); line-height: 1.2; }
h2 { font-size: 1.125rem; line-height: 1.4; }
button, input, select, textarea { font-family: inherit; }
.btn, .input, .select { min-height: 2.75rem; }
.btn:disabled { cursor: not-allowed; }
.input, .select { width: 100%; min-width: 0; }
.btn:not(.btn-primary, .btn-error, .btn-ghost) { border-color: #c8c0b7; }
.input, .select { border-color: #c8c0b7; }
a.btn { text-decoration: none; }
:where(a, button, input, select, textarea, summary, [tabindex]):focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  z-index: 2;
  inset: 0.5rem auto auto 1rem;
  padding: 0.5rem 0.75rem;
  background: var(--color-base-100);
  color: var(--color-primary);
  transform: translateY(-150%);
}
.skip-link:focus { transform: none; }

.account-header { background: var(--account-ink); color: #fff; border-bottom: 3px solid var(--color-accent); }
.account-header-inner {
  width: min(100%, var(--account-width));
  min-height: 4.5rem;
  margin-inline: auto;
  padding: 0.65rem var(--account-gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.25rem;
}
.brand { display: flex; align-items: center; gap: 0.7rem; font-size: 0.95rem; font-weight: 700; }
.brand img { border-radius: 0.65rem; background: #fff; object-fit: contain; }
.account-session { display: flex; align-items: center; gap: 0.5rem 1rem; min-width: 0; }
.account-session .btn { color: #fff; }
.account-session .btn:hover { background: #3b3630; }
.account-session .btn:focus-visible { outline-color: var(--color-accent); }
.account-identity { display: grid; min-width: 0; font-size: 0.9rem; overflow-wrap: anywhere; line-height: 1.35; }
#identity-role { color: #ded8d1; font-size: 0.8rem; }

body:has(.auth-layout:not([hidden])) .account-header {
  position: absolute;
  z-index: 1;
  inset: 0 58% auto 0;
  background: none;
  color: #17271f;
  border: 0;
}
body:has(.auth-layout:not([hidden])) .account-header-inner {
  width: 100%;
  padding: clamp(1rem, 3.6vw, 2.75rem);
}
body:has(.auth-layout:not([hidden])) .brand { font-size: 1.05rem; }
body:has(.auth-layout:not([hidden])) .brand img { background: none; }

.initial-status { text-align: center; margin: 4rem auto; padding-inline: var(--account-gutter); color: var(--account-muted); }
.initial-status .btn { margin-top: 0.75rem; }
.auth-layout {
  --color-primary: #204935;
  --color-base-200: #f7f6f1;
  --color-base-300: #d9dbd2;
  --auth-ink: #17271f;
  --auth-muted: #515950;
  --auth-serif: "Songti SC", "Noto Serif CJK SC", "STSong", SimSun, serif;
  display: grid;
  grid-template-columns: minmax(0, 42fr) minmax(0, 58fr);
  min-height: 100vh;
  min-height: 100svh;
  background: var(--color-base-200);
  color: var(--auth-ink);
}
.auth-card { border-radius: 0; }
.auth-card .card-body {
  justify-content: center;
  width: min(100% - 3rem, 23rem);
  margin-inline: auto;
  padding: clamp(6.5rem, 12vh, 8rem) 0 clamp(2rem, 7vh, 4.5rem);
  gap: 0.65rem;
}
.auth-card .card-body > p { flex-grow: 0; }
.auth-wordmark {
  font: 700 0.72rem/1.4 Georgia, serif;
  letter-spacing: 0.27em;
  color: var(--color-primary);
  margin-bottom: 0.45rem;
}
.auth-wordmark::after, .auth-kicker::before {
  content: "";
  display: block;
  width: 2.1rem;
  height: 2px;
  background: var(--color-accent);
}
.auth-wordmark::after { margin-top: 0.85rem; }
.auth-card h1 {
  font-family: var(--auth-serif);
  font-size: clamp(2.35rem, 3.6vw, 3.4rem);
  font-weight: 700;
  color: var(--auth-ink);
}
#auth-description { color: var(--auth-muted); font-size: 0.95rem; }
.auth-form { display: grid; gap: 0.5rem; margin-top: 1.25rem; }
.auth-form label { font-weight: 600; }
.auth-form input + label { margin-top: 0.45rem; }
.auth-form button[type="submit"] { margin-top: 0.6rem; }
#login-form { gap: 0; margin-top: 1.55rem; }
.auth-field { display: grid; gap: 0.45rem; }
.auth-field + .auth-field { margin-top: 1.15rem; }
.auth-field label { font-size: 0.9rem; }
.auth-card .input {
  min-height: 3.1rem;
  border-color: #a3aba0;
  background: #fffefa;
  font-size: 1rem;
}
.auth-field .input::placeholder { color: #626c63; opacity: 1; }
.auth-password { position: relative; }
.auth-password .input { padding-inline-end: 3.2rem; }
.auth-password .btn {
  position: absolute;
  inset-block-start: 50%;
  inset-inline-end: 0.2rem;
  transform: translateY(-50%);
  min-width: 2.75rem;
  padding: 0;
  color: var(--auth-muted);
}
.auth-password .btn:focus-visible { outline-offset: -2px; }
.auth-password input[type="password"] + .btn .password-slash { display: none; }
#login-form button[type="submit"] {
  margin-top: 1.45rem;
  min-height: 3.2rem;
  font-size: 1rem;
}
#login-error:not(:empty) {
  margin: 0.75rem 0 0;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-field);
  background: #fff1ed;
}
.auth-help {
  margin-top: 1.65rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-base-300);
  color: var(--auth-muted);
  font-size: 0.85rem;
}
.auth-visual {
  display: flex;
  align-items: end;
  padding: clamp(2rem, 4.7vw, 5rem);
  color: #fffefa;
  background:
    linear-gradient(180deg, transparent 35%, rgb(17 25 20 / 42%) 62%, rgb(11 20 15 / 89%) 100%),
    #253529 url("/assets/login-campus.webp") center 45% / cover no-repeat;
}
.auth-kicker { font-size: 0.85rem; font-weight: 650; letter-spacing: 0.12em; }
.auth-kicker::before { margin-bottom: 0.95rem; }
.auth-tagline {
  margin-top: 0.65rem;
  font: 700 clamp(1.85rem, 3.35vw, 3.7rem)/1.33 var(--auth-serif);
  letter-spacing: 0.025em;
}
.eyebrow { color: var(--color-primary); font-weight: 700; font-size: 0.8rem; letter-spacing: 0.08em; }

.muted { color: var(--account-muted); font-size: 0.875rem; }
.account-message { margin-block: 0.75rem; font-size: 0.9rem; overflow-wrap: anywhere; }
.account-message:empty { margin: 0; }
.account-message.error { color: var(--color-error); }

.workspace { width: min(100%, var(--account-width)); margin-inline: auto; padding: 0 var(--account-gutter) 3rem; }
.overview-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  flex-wrap: wrap;
  gap: 0.8rem 1.5rem;
  padding-block: clamp(1.5rem, 4vw, 2.75rem) 1.15rem;
}
.overview-heading h1 { margin-top: 0.25rem; }
.freshness { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; font-size: 0.85rem; }
.freshness dt { font-size: 0.75rem; color: var(--account-muted); }
.freshness dd { font-variant-numeric: tabular-nums; }

.filter-bar, .data-card, .metric, .empty-state { border: 1px solid var(--color-base-300); background: var(--color-base-100); }
.filter-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(8rem, 1fr)) auto;
  gap: 0.75rem;
  align-items: end;
  padding: 1rem;
}
.filter-field, .trend-filter { display: grid; min-width: 0; gap: 0.3rem; }
.filter-field label, .trend-filter label { font-size: 0.875rem; font-weight: 600; }
.filter-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.filter-hint { grid-column: 1 / -1; }
.metric-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 10.5rem), 1fr)); gap: 0.75rem; margin-block: 1rem; }
.metric { padding: 0.9rem 1rem; gap: 0.25rem; min-width: 0; }
.metric dt, .metric-coverage { font-size: 0.8rem; color: var(--account-muted); }
.metric-value {
  font-size: clamp(1.3rem, 2.7vw, 1.95rem);
  font-weight: 700;
  line-height: 1.25;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}
.metric-unit { font-size: 0.75rem; margin-left: 0.3rem; font-weight: 500; color: var(--account-muted); }
.coverage-note { padding: 0.65rem 0.9rem; border-left: 3px solid var(--color-primary); background: var(--account-tint); }
.data-card { padding: clamp(0.8rem, 2.5vw, 1.4rem); margin-top: 0.85rem; min-width: 0; }
.section-heading { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 0.75rem; margin-bottom: 0.9rem; }
.section-heading h2 { margin-bottom: 0.15rem; }
.trend-filter { min-width: min(100%, 8.75rem); }
.empty-state { padding: clamp(1.5rem, 5vw, 3.5rem); text-align: center; margin-top: 1rem; gap: 0.5rem; }

.chart {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  align-items: stretch;
  column-gap: 0.5rem;
  font-variant-numeric: tabular-nums;
}
.chart svg { width: 100%; height: 11.25rem; }
.chart-axis {
  padding-block: 0.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: right;
  color: var(--account-muted);
  font-size: 0.75rem;
  line-height: 1;
}
.chart-gridline { stroke: var(--color-base-300); stroke-width: 1; }
.chart-series { fill: none; stroke: var(--color-primary); stroke-width: 2.25; vector-effect: non-scaling-stroke; }
.chart-dot { fill: var(--color-primary); stroke: var(--color-primary); stroke-width: 2; vector-effect: non-scaling-stroke; }
.chart-dates { display: flex; justify-content: space-between; color: var(--account-muted); font-size: 0.75rem; margin-top: 0.15rem; }
.chart-details { margin-top: 0.55rem; }
.chart-details summary {
  cursor: pointer;
  color: var(--color-primary);
  min-height: 2.75rem;
  padding-block: 0.65rem;
  font-size: 0.875rem;
}
.trend-empty { padding: 1rem 0; }
.table-scroll { overflow-x: auto; max-width: 100%; border: 1px solid var(--color-base-300); border-radius: 0.5rem; }
.table-scroll th, .table-scroll td { padding: 0.7rem 0.85rem; white-space: nowrap; }
.table-scroll th { background: var(--color-base-200); color: var(--account-muted); }
.table-scroll tbody tr:hover { background: var(--account-tint); }
.table-scroll .numeric { text-align: right; font-variant-numeric: tabular-nums; }
.pager { display: flex; flex-wrap: wrap; justify-content: flex-end; align-items: center; gap: 0.5rem; margin-top: 0.85rem; }
#page-count { font-size: 0.875rem; color: var(--account-muted); margin-right: 0.25rem; }

@media (max-width: 57rem) {
  .filter-bar { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .filter-actions { grid-column: 1 / -1; }
}
@media (max-width: 50rem) {
  body:has(.auth-layout:not([hidden])) .account-header { inset-inline-end: 0; }
  .auth-layout { grid-template-columns: 1fr; }
  .auth-visual { display: none; }
  .auth-card .card-body { padding-block: 6.75rem 2.5rem; }
}
@media (max-width: 42rem) {
  .account-session { flex: 1 1 100%; justify-content: space-between; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0s !important; transition-duration: 0s !important; }
}