:root { font-family: system-ui, -apple-system, Segoe UI, sans-serif; color: #20242a; background: #f5f7fa; }
* { box-sizing: border-box; }
body { margin: 0; }
button, input { font: inherit; }
.shell { max-width: 1180px; margin: 0 auto; padding: 24px; }
.topbar { display: flex; gap: 24px; justify-content: space-between; align-items: center; margin-bottom: 20px; }
h1, h2, h3, p { margin-top: 0; }
.topbar h1 { margin-bottom: 4px; }
.topbar p { margin-bottom: 0; color: #667085; }
.session-box { display: flex; gap: 8px; align-items: end; flex-wrap: wrap; }
.session-box label { width: 100%; font-size: 12px; color: #667085; }
input { min-height: 40px; border: 1px solid #d0d5dd; border-radius: 8px; padding: 8px 10px; background: #fff; }
button { min-height: 40px; padding: 8px 14px; border: 0; border-radius: 8px; cursor: pointer; background: #1d2939; color: #fff; }
button.secondary { background: #e4e7ec; color: #344054; }
.notice { padding: 12px 14px; border-radius: 8px; margin-bottom: 16px; background: #fff4e5; }
.card, .identity-card { background: #fff; border: 1px solid #eaecf0; border-radius: 12px; padding: 18px; }
.empty { text-align: center; padding: 50px 20px; }
.identity-card { margin-bottom: 16px; }
.identity-card .meta { display: flex; gap: 14px; flex-wrap: wrap; color: #667085; font-size: 14px; }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.tabs button { background: transparent; color: #475467; border: 1px solid #d0d5dd; }
.tabs button.active { background: #1d2939; color: #fff; }
.grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.metric { padding: 16px; background: #fff; border: 1px solid #eaecf0; border-radius: 10px; }
.metric strong { display: block; font-size: 28px; margin-bottom: 4px; }
.metric span { color: #667085; }
.actions { margin-top: 10px; gap: 8px; }
.inline-form { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.inline-form input { flex: 1 1 180px; }
.panel-head { display: flex; justify-content: space-between; gap: 12px; align-items: center; margin-bottom: 12px; }
.list { display: grid; gap: 10px; }
.item { padding: 14px; background: #fff; border: 1px solid #eaecf0; border-radius: 10px; }
.item .row { display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.item .muted { color: #667085; font-size: 13px; }
.form-card { margin-bottom: 14px; }
.form-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-bottom: 12px; }
@media (max-width: 800px) { .topbar { flex-direction: column; align-items: stretch; } .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .form-grid { grid-template-columns: 1fr; } }
@media (max-width: 520px) { .shell { padding: 14px; } .grid { grid-template-columns: 1fr; } .session-box { align-items: stretch; } }

select { min-height: 40px; border: 1px solid #d0d5dd; border-radius: 8px; padding: 8px 10px; background: #fff; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.actions form { width: 100%; }

.bid-row { display:flex; justify-content:space-between; gap:8px; align-items:center; padding:8px 10px; margin-top:6px; border:1px solid #eaecf0; border-radius:8px; background:#f8fafc; }
.auction-selection { margin-top:10px; }

.split-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:20px}
@media (max-width:900px){.split-grid{grid-template-columns:1fr}}
.session-advanced { width: 100%; }
.session-advanced summary { cursor: pointer; color: var(--muted, #667085); font-size: .85rem; }