:root{
  --ok:#16a34a;
  --danger:#dc2626;
  --warn:#d97706;
  --surface-soft:#f1f5f9;
  --border-strong:#cbd5e1;
  --accent-soft:#e0f2fe;
  --focus-ring:0 0 0 3px rgba(14,165,233,.28);
  --container-max: min(1680px, 92%);
}

@media (prefers-color-scheme: dark){
  :root{
    --surface-soft:#0f172a;
    --border-strong:#334155;
    --accent-soft:#102a43;
    --focus-ring:0 0 0 3px rgba(56,189,248,.24);
  }
}

@supports (color: color-mix(in oklab, white, black)){
  :root{
    --surface-soft: color-mix(in oklab, var(--surface) 86%, var(--bg) 14%);
    --border-strong: color-mix(in oklab, var(--border) 72%, var(--text) 28%);
    --accent-soft: color-mix(in oklab, var(--accent) 16%, var(--surface) 84%);
    --focus-ring: 0 0 0 3px color-mix(in oklab, var(--accent) 30%, transparent);
  }
}

.mock-app{
  display:flex;
  flex-direction:column;
  gap:18px;
  padding-bottom:72px;
}

.toast-region{
  position:fixed;
  right:14px;
  bottom:14px;
  width:min(420px, calc(100vw - 28px));
  display:flex;
  flex-direction:column;
  gap:10px;
  z-index:9998;
  pointer-events:none;
}
.toast{
  pointer-events:auto;
  border-radius:16px;
  border:1px solid var(--border);
  background:var(--surface);
  box-shadow:var(--shadow);
  padding:12px 14px;
  font-size:13px;
  line-height:1.55;
}
.toast strong{ font-weight:1000; }
.toast.info{ border-left:6px solid color-mix(in oklab, var(--accent) 75%, var(--border) 25%); }
.toast.warn{ border-left:6px solid color-mix(in oklab, var(--warn) 70%, var(--border) 30%); }
.toast.error{ border-left:6px solid color-mix(in oklab, var(--danger) 70%, var(--border) 30%); }
.toast button{
  appearance:none;
  border:0;
  background:transparent;
  color:inherit;
  font:inherit;
  padding:0;
  cursor:pointer;
  text-align:left;
  width:100%;
}

.view{ display:none; }
.view.active{ display:block; }

.panel{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:var(--shadow);
  padding:18px clamp(16px, 2.4vw, 26px);
}
.panel + .panel{ margin-top:16px; }

.panel h2{
  margin:0 0 10px;
  font-size:18px;
  line-height:1.4;
}
.panel p{ margin:8px 0; color:var(--muted); }

.menu-grid{
  display:grid;
  grid-template-columns: minmax(0, 1fr);
  gap:16px;
}
@media (min-width: 960px){
  .menu-grid{ grid-template-columns: 1fr 1fr; }
}

.field{
  display:flex;
  flex-direction:column;
  gap:6px;
}
.field label{
  font-weight:700;
  color:color-mix(in oklab, var(--text) 88%, var(--muted) 12%);
}
.hint{ font-size:13px; color:var(--muted); }
.hint.explain{ white-space:pre-wrap; }

select,
input[type="text"],
textarea{
  width:100%;
  max-width:100%;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--border-strong);
  background:var(--surface-soft);
  color:var(--text);
  font:inherit;
  line-height:1.3;
}
textarea{ min-height:120px; resize:vertical; }
select:focus,
input[type="text"]:focus,
textarea:focus{
  outline:none;
  border-color:var(--accent);
  box-shadow:var(--focus-ring);
}

input.is-invalid,
select.is-invalid{
  border-color:var(--danger);
  box-shadow:0 0 0 3px color-mix(in oklab, var(--danger) 22%, transparent);
}
input.is-warn{
  border-color:color-mix(in oklab, var(--warn) 55%, var(--border) 45%);
  box-shadow:0 0 0 3px color-mix(in oklab, var(--warn) 18%, transparent);
}

.btn-row{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid var(--border-strong);
  background:var(--surface-soft);
  color:var(--text);
  cursor:pointer;
  font-weight:800;
  text-decoration:none;
}
.btn:hover{ background:var(--accent-soft); }
.btn.primary{
  background:linear-gradient(135deg, var(--accent), color-mix(in oklab, var(--accent) 66%, var(--accent-2) 34%));
  border-color:transparent;
  color:white;
}
.btn.primary:hover{ filter:saturate(1.05) brightness(1.02); }
.btn.danger{
  background:color-mix(in oklab, var(--danger) 12%, var(--surface) 88%);
  border-color:color-mix(in oklab, var(--danger) 55%, var(--border) 45%);
  color:color-mix(in oklab, var(--danger) 72%, var(--text) 28%);
}
.btn.ghost{
  background:transparent;
}
.btn[disabled]{
  opacity:.55;
  cursor:not-allowed;
}

.topbar{
  position:sticky;
  top:10px;
  z-index:10;
  backdrop-filter:saturate(1.3) blur(12px);
  background:color-mix(in oklab, var(--bg) 80%, transparent);
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:var(--shadow);
  padding:12px 14px;
}
.topbar-inner{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}
.tabs{
  display:flex;
  gap:6px;
  align-items:center;
  flex-wrap:wrap;
}
.tab{
  padding:8px 12px;
  border-radius:999px;
  border:1px solid var(--border-strong);
  background:var(--surface-soft);
  cursor:pointer;
  font-weight:900;
}
.tab[aria-selected="true"]{
  border-color:var(--accent);
  background:var(--accent-soft);
}
.tab:focus{
  outline:none;
  box-shadow:var(--focus-ring);
}
.timer{
  margin-left:auto;
  font-variant-numeric:tabular-nums;
  font-weight:900;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid var(--border-strong);
  background:var(--surface);
}
.timer.is-danger{
  border-color:color-mix(in oklab, var(--danger) 55%, var(--border) 45%);
  color:var(--danger);
}
.timer.is-paused{
  border-color:color-mix(in oklab, var(--warn) 55%, var(--border) 45%);
  color:color-mix(in oklab, var(--warn) 78%, var(--text) 22%);
}

.pause-overlay{
  position:fixed;
  inset:0;
  z-index:9997;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:18px;
  background:rgba(15,23,42,.55);
  background:color-mix(in oklab, var(--bg) 45%, transparent);
  backdrop-filter:saturate(1.2) blur(10px);
}
.pause-box{
  width:min(620px, 100%);
  box-shadow:var(--shadow);
}
.pause-overlay[hidden]{ display:none; }

.section-lead{
  margin:0 0 14px;
  color:var(--muted);
  font-size:14px;
}

.qcard{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:18px;
  box-shadow:var(--shadow);
  padding:16px 16px 14px;
  margin:0 0 14px;
}
.qhead{
  display:flex;
  gap:10px;
  align-items:flex-start;
  justify-content:space-between;
  flex-wrap:wrap;
  margin-bottom:10px;
}
.qtitle{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight:900;
}
.qtitle .no{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:40px;
  height:28px;
  border-radius:999px;
  background:var(--accent-soft);
  border:1px solid color-mix(in oklab, var(--accent) 40%, var(--border) 60%);
  font-variant-numeric:tabular-nums;
}
.qmeta{
  display:flex;
  gap:8px;
  align-items:center;
  flex-wrap:wrap;
}
.pill{
  font-size:12px;
  padding:4px 8px;
  border-radius:999px;
  border:1px solid var(--border);
  background:var(--surface-soft);
  color:color-mix(in oklab, var(--text) 78%, var(--muted) 22%);
}
.pill.ok{
  border-color:color-mix(in oklab, var(--ok) 55%, var(--border) 45%);
  background:color-mix(in oklab, var(--ok) 10%, var(--surface) 90%);
  color:color-mix(in oklab, var(--ok) 75%, var(--text) 25%);
}
.pill.ng{
  border-color:color-mix(in oklab, var(--danger) 55%, var(--border) 45%);
  background:color-mix(in oklab, var(--danger) 10%, var(--surface) 90%);
  color:color-mix(in oklab, var(--danger) 75%, var(--text) 25%);
}

.prompt{
  margin:0 0 12px;
  font-weight:700;
  color:var(--text);
}

.grid-two{
  display:grid;
  grid-template-columns: 1fr;
  gap:10px;
}
@media (min-width: 880px){
  .grid-two{ grid-template-columns: 1fr 1fr; }
}

.side{
  border:1px solid var(--border);
  border-radius:14px;
  background:var(--surface-soft);
  padding:12px;
}
.side h3{
  margin:0 0 8px;
  font-size:14px;
  color:color-mix(in oklab, var(--text) 78%, var(--muted) 22%);
}

.entry-row{
  display:grid;
  grid-template-columns: 34px 1fr 140px;
  gap:8px;
  align-items:center;
  margin-bottom:8px;
}
.entry-row:last-child{ margin-bottom:0; }
.row-no{
  width:34px;
  height:34px;
  border-radius:999px;
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--accent-soft);
  border:1px solid color-mix(in oklab, var(--accent) 40%, var(--border) 60%);
  font-variant-numeric:tabular-nums;
  font-weight:900;
  color:color-mix(in oklab, var(--text) 80%, var(--muted) 20%);
}
.entry-row .num{
  text-align:right;
  font-variant-numeric:tabular-nums;
}
.entry-row input[type="text"]{ text-align:right; font-variant-numeric:tabular-nums; }

.inline-error{
  margin:8px 0 0;
  font-size:13px;
  color:color-mix(in oklab, var(--danger) 80%, var(--text) 20%);
}
.inline-warn{
  margin:8px 0 0;
  font-size:13px;
  color:color-mix(in oklab, var(--warn) 78%, var(--text) 22%);
}

table{
  width:100%;
  border-collapse:collapse;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:14px;
  overflow:hidden;
}
thead th{
  background:var(--accent-soft);
  border-bottom:1px solid var(--border);
  padding:8px 10px;
  font-size:13px;
  text-align:center;
  color:color-mix(in oklab, var(--text) 88%, var(--muted) 12%);
}
tbody td{
  border-bottom:1px solid var(--border);
  padding:8px 10px;
  font-size:14px;
}
thead th,
tbody td{
  border-right:1px solid var(--border);
}
thead th:last-child,
tbody td:last-child{
  border-right:none;
}
tbody tr:last-child td{ border-bottom:none; }
td.num{
  text-align:right;
  font-variant-numeric:tabular-nums;
}
td.center{ text-align:center; }
td.account{ text-align:center; }

.result-grid{
  display:grid;
  grid-template-columns: 1fr;
  gap:14px;
}
@media (min-width: 960px){
  .result-grid{ grid-template-columns: 1.1fr 0.9fr; }
}

.score-big{
  font-variant-numeric:tabular-nums;
  font-weight:1000;
  font-size:44px;
  line-height:1.05;
  margin:6px 0 8px;
}
.score-sub{
  margin:0;
  color:var(--muted);
}

.topic-list{
  margin:10px 0 0;
  padding-left:1.2em;
}
.topic-list li{ margin:4px 0; }

.details{
  margin-top:12px;
}
.details summary{
  cursor:pointer;
  font-weight:900;
}