:root {
    color-scheme: light dark;
    --bg: #f6f7f9;
    --fg: #17202a;
    --muted: #55606b;
    --panel: #ffffff;
    --line: #cfd6dd;
    --accent: #0b5cad;
    --accent-fg: #ffffff;
    --danger: #a4262c;
    --ok: #1d6b3a;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #12161b;
        --fg: #e8ecf0;
        --muted: #a2adb8;
        --panel: #1b2128;
        --line: #38424d;
        --accent: #6aa8e8;
        --accent-fg: #0a1118;
        --danger: #ff8a8f;
        --ok: #7ed39a;
    }
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.app-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px 16px;
    padding: 12px 16px;
    background: var(--panel);
    border-bottom: 1px solid var(--line);
}

h1 { margin: 0; font-size: 1.15rem; }
h2 { margin: 0 0 8px; font-size: 1.05rem; }
h3 { margin: 16px 0 4px; font-size: 1rem; }

main { padding: 16px; max-width: 72rem; margin: 0 auto; }

.skip-link { position: absolute; left: -999px; }
.skip-link:focus { left: 8px; top: 8px; background: var(--panel); padding: 8px; z-index: 1; }

.layout { display: grid; gap: 16px; grid-template-columns: 1fr; }

@media (min-width: 52rem) {
    .layout { grid-template-columns: minmax(16rem, 22rem) 1fr; align-items: start; }
}

.panel, #signin-region, #locked-region {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 16px;
}

button, select, input {
    font: inherit;
    color: inherit;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 8px 12px;
    min-height: 40px;
}

button { cursor: pointer; }
button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
button:disabled { opacity: 0.55; cursor: not-allowed; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.field { margin: 12px 0; }
.field label, fieldset label { display: block; font-weight: 600; margin-bottom: 4px; }
.field input { width: 100%; max-width: 22rem; }
.hint { color: var(--muted); font-size: 0.9rem; margin: 4px 0; }

.case-list { list-style: none; padding: 0; margin: 12px 0; display: grid; gap: 8px; }
.case-item { display: grid; gap: 2px; width: 100%; text-align: left; }
.case-item[aria-current="true"] { border-color: var(--accent); box-shadow: inset 4px 0 0 var(--accent); }
.case-title { font-weight: 600; }
.badge { color: var(--ok); font-weight: 600; }

.facts { display: grid; grid-template-columns: max-content 1fr; gap: 4px 16px; margin: 8px 0; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; overflow-wrap: anywhere; }

fieldset { border: 1px solid var(--line); border-radius: 6px; margin: 12px 0; padding: 8px 12px 12px; }
fieldset select { display: block; margin-bottom: 8px; max-width: 100%; }

.actions { margin-top: 16px; }
.confirm { border: 2px solid var(--accent); border-radius: 8px; padding: 12px; }
.confirm button { margin-right: 8px; }

.error { color: var(--danger); }
.notice { padding: 8px 12px; border-radius: 6px; border: 1px solid var(--line); }
.notice.error { border-color: var(--danger); }
.notice.success { border-color: var(--ok); }

#start-over, #close-case, #refresh-queue, #more-cases { margin-top: 8px; }

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}

.setup-key {
    display: inline-block;
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    font-size: 1.1rem;
    letter-spacing: 0.05em;
    overflow-wrap: anywhere;
    user-select: all;
}