:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #172b4d;
  background: #f4f7fb;
}
* { box-sizing: border-box; }
body { margin: 0; }
button, input, select { font: inherit; }
button { border: 0; border-radius: 7px; padding: 9px 13px; background: #1463d9; color: #fff; font-weight: 700; cursor: pointer; }
button:disabled { cursor: wait; opacity: .6; }
button.secondary { background: #fff; color: #30527e; border: 1px solid #cedaea; }
input, select { border: 1px solid #b8c6d8; border-radius: 6px; padding: 9px; background: #fff; }
.muted { color: #71829c; font-size: .86rem; }
.error { color: #c42b30; }
.no-margin { margin: 0; }
.shell { min-height: 100vh; display: grid; grid-template-columns: 220px 1fr; }
.sidebar { background: #073465; color: #e8f1ff; padding: 23px 14px; }
.brand { font-size: 1.28rem; font-weight: 800; margin: 0 10px 30px; }
.brand small, .brand-kicker { display: block; margin: 0 0 4px; color: #5581b0; font-size: .72rem; letter-spacing: .1em; font-weight: 800; }
.brand small { color: #aac7ea; }
.nav a { display: block; padding: 11px 12px; border-radius: 7px; color: #d7e6fb; text-decoration: none; margin: 4px 0; font-size: .91rem; }
.nav a:hover, .nav a.active { background: #19528d; color: #fff; }
.content { padding: 28px; max-width: 1500px; width: 100%; margin: auto; }
.topbar, .panel-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.topbar { margin-bottom: 24px; }
.topbar h1, .panel h2 { margin: 0; }
.topbar p { margin: 5px 0 0; }
.summary { display: grid; grid-template-columns: repeat(4, minmax(130px, 1fr)); gap: 14px; margin-bottom: 20px; }
.card, .panel { background: #fff; border: 1px solid #e2e9f2; border-radius: 11px; box-shadow: 0 1px 3px #17345b0c; }
.card { padding: 17px; }
.card strong { display: block; margin-top: 7px; font-size: 1.7rem; color: #133f72; }
.card small { color: #71829c; }
.card.alert strong { color: #dd343d; }
.dashboard-grid { display: grid; grid-template-columns: minmax(360px, 1.25fr) minmax(300px, .85fr); gap: 20px; }
.panel { padding: 20px; min-width: 0; }
.panel h2 { font-size: 1rem; }
.full-width { grid-column: 1 / -1; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 8px; text-align: left; border-bottom: 1px solid #edf1f6; font-size: .86rem; }
th { color: #71829c; font-size: .75rem; }
.site-row { cursor: pointer; }
.site-row:hover { background: #f6f9fd; }
.badge { display: inline-block; padding: 3px 8px; border-radius: 99px; font-size: .75rem; font-weight: 800; }
.online, .locked, .completed, .empty, .active { background: #dff5e7; color: #187545; }
.offline, .unknown, .expired { background: #edf1f6; color: #677891; }
.unlocked, .failed, .error { background: #ffdfdf; color: #bc3035; }
.occupied, .pending, .picked, .used { background: #dceafe; color: #1d5ea9; }
.plain-list { list-style: none; padding: 0; margin: 0; }
.plain-list li { padding: 11px 0; border-bottom: 1px solid #edf1f6; font-size: .86rem; }
.list-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.map-panel { min-height: 340px; overflow-x: auto; }
.compact-label { display: flex; align-items: center; gap: 7px; color: #71829c; font-size: .8rem; }
.zone-title { margin: 20px 0 10px; font-size: .9rem; }
.locker-map { display: grid; grid-template-columns: repeat(5, minmax(58px, 1fr)); grid-auto-rows: 76px; gap: 10px; min-width: 330px; }
.locker { border: 1px solid #dbe4ef; border-radius: 8px; background: #fff; color: #244366; padding: 8px; text-align: left; }
.locker strong { display: block; }
.locker span { font-size: .72rem; }
.locker.occupied { background: #e1efff; border-color: #b9d5f3; }
.locker.unlocked { background: #fff4db; border-color: #f0d078; }
.locker.error { background: #ffe1e1; border-color: #f7b6b9; }
.locker.offline { background: #eef1f5; }
.legend { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 15px; font-size: .8rem; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 4px; }
.legend-occupied { background: #cfe4ff; }.legend-empty { background: #fff; border: 1px solid #ccd8e6; }.legend-unlocked { background: #ffe8a3; }.legend-error { background: #ffbfc1; }.legend-offline { background: #e4e9f0; }
.backdrop { position: fixed; inset: 0; background: #102c5266; z-index: 4; }
.detail { position: fixed; inset: 0 0 0 auto; width: min(440px, 100vw); padding: 24px; background: #fff; box-shadow: -8px 0 30px #102c5229; z-index: 5; overflow: auto; }
[hidden] { display: none !important; }
.detail-list { display: grid; grid-template-columns: 95px 1fr; gap: 12px; margin: 24px 0; font-size: .9rem; }
.detail-list dt { color: #71829c; }.detail-list dd { margin: 0; }
.form-stack { display: grid; gap: 12px; }
.form-stack label { display: grid; gap: 6px; font-weight: 700; }
.issue-row { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 10px; }
.status-message { min-height: 24px; color: #315c8e; }
.usage-result { margin-top: 20px; padding-top: 18px; border-top: 1px solid #e5ebf3; }
.usage-result input { width: 100%; margin-bottom: 9px; }
.usage-result img { display: block; width: 240px; max-width: 100%; margin: 14px auto; border: 1px solid #e2e9f2; }
.toast { position: fixed; right: 20px; bottom: 20px; z-index: 8; padding: 12px 16px; border-radius: 8px; background: #17345b; color: #fff; box-shadow: 0 4px 20px #102c5240; }
.login-page { max-width: 430px; margin: 10vh auto; padding: 20px; }.login-card { padding: 26px; }.login-card h1 { margin-top: 0; }
.api-page .panel { margin-top: 18px; }.api-page pre { overflow: auto; padding: 16px; border-radius: 8px; background: #101828; color: #f2f4f7; }
@media (max-width: 900px) { .shell { grid-template-columns: 1fr; }.sidebar { display: flex; align-items: center; gap: 15px; padding: 12px; overflow: auto; }.brand { margin: 0; white-space: nowrap; }.nav { display: flex; }.nav a { white-space: nowrap; }.content { padding: 18px; }.summary { grid-template-columns: repeat(2, 1fr); }.dashboard-grid { grid-template-columns: 1fr; }.full-width { grid-column: auto; } }
@media (max-width: 560px) { .topbar, .panel-head { align-items: flex-start; flex-direction: column; }.summary { grid-template-columns: 1fr 1fr; }.hide-mobile { display: none; }.content { padding: 13px; }.panel { padding: 15px; }.issue-row { grid-template-columns: 1fr; } }


.small-btn { padding: 4px 9px; font-size: .75rem; margin-left: 6px; }
.plain-list .list-row + .list-row { margin-top: 5px; }