:root {
  --ink: #172839;
  --muted: #5c6d7b;
  --surface: #f5f7f9;
  --line: #d9e2e8;
  --accent: #145a80;
  --accent-soft: #e6f3f8;
  --free: #f4f8fa;
}
body { background: var(--surface); color: var(--ink); }
a { color: var(--accent); }
.site-header { background: #fff; border-bottom: 1px solid var(--line); }
.brand { color: var(--ink); font-size: 1.15rem; font-weight: 750; text-decoration: none; }
.site-header .nav-link { border-radius: .4rem; padding: .45rem .7rem; color: var(--ink); }
.site-header .nav-link:hover, .site-header .nav-link:focus-visible { background: var(--accent-soft); }
.skip-link { position: absolute; left: -9999px; top: 0; background: #fff; padding: .7rem; z-index: 1000; }
.skip-link:focus { left: 0; }
.page-heading { display: flex; justify-content: space-between; align-items: start; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.page-heading h1 { margin-bottom: .25rem; font-weight: 700; }
.eyebrow { text-transform: uppercase; letter-spacing: .09em; font-weight: 700; font-size: .75rem; color: var(--accent); margin-bottom: .35rem; }
.card { border-color: var(--line); }
.card-header { background: #fff; border-color: var(--line); padding: 1rem 1.25rem; }
.filter-panel label { font-size: .875rem; font-weight: 650; }
.editor-form { max-width: 850px; }
.login-card { max-width: 430px; }
.empty-state { padding: 4rem 1.5rem; border: 1px dashed var(--line); border-radius: .75rem; text-align: center; background: #fff; }
.empty-state h2 { font-size: 1.5rem; }
.record-card { display: flex; flex-direction: column; gap: .25rem; background: #fff; border: 1px solid var(--line); padding: 1rem; border-radius: .65rem; text-decoration: none; color: var(--ink); min-height: 88px; }
.record-card:hover, .record-card:focus-visible { border-color: var(--accent); background: var(--accent-soft); }
.record-card strong { color: var(--accent); font-size: 1.08rem; }
.record-card small, .record-card span { color: var(--muted); }
.card-stack { display: grid; gap: .65rem; }
.rack-units { max-height: 70vh; overflow-y: auto; }
.rack-unit { display: grid; grid-template-columns: 4.5rem 1fr auto; align-items: center; min-height: 3.25rem; border-top: 1px solid var(--line); }
.rack-unit:first-child { border-top: 0; }
.rack-unit.occupied { background: var(--accent-soft); }
.rack-unit.available { background: var(--free); }
.rack-number { font-weight: 700; text-align: center; border-right: 1px solid var(--line); padding: .8rem .3rem; }
.rack-unit-content { padding: .55rem .8rem; min-width: 0; }
.rack-unit-content a { font-weight: 650; }
.rack-unit-content small { display: block; color: var(--muted); overflow-wrap: anywhere; }
.rack-add { margin-right: .65rem; min-height: 44px; }
.detail-grid { display: grid; grid-template-columns: 9rem 1fr; column-gap: 1rem; row-gap: .8rem; margin: 0; }
.detail-grid dt { color: var(--muted); font-weight: 600; }
.detail-grid dd { margin: 0; overflow-wrap: anywhere; }
.preserve-lines { white-space: pre-wrap; }
.history-list { display: grid; gap: .5rem; }
.history-event { background: #fff; border: 1px solid var(--line); border-radius: .5rem; padding: .85rem 1rem; }
.history-event summary { cursor: pointer; min-height: 30px; }
.break-text { overflow-wrap: anywhere; max-width: 25rem; white-space: pre-wrap; }
.btn, .form-control, .form-select { min-height: 44px; }
.btn-sm { min-height: 44px; }
:focus-visible { outline: 3px solid #d88924 !important; outline-offset: 2px; }
@media (max-width: 767px) {
  main { padding-top: 1.25rem !important; }
  .page-heading { align-items: stretch; }
  .page-heading .btn { width: 100%; }
  .rack-units { max-height: none; }
  .rack-unit { grid-template-columns: 3.5rem 1fr auto; }
  .detail-grid { grid-template-columns: 1fr; row-gap: .2rem; }
  .detail-grid dd { margin-bottom: .6rem; }
}