:root { --bg: #0f172a; --panel: #111827; --text: #f8fafc; --muted: #cbd5e1; --border: #64748b; --accent: #93c5fd; --ok: #dcfce7; --err: #fee2e2; --okText: #052e16; --errText: #450a0a; }
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, sans-serif; line-height: 1.5; background: var(--bg); color: var(--text); }
a { color: var(--accent); }
.skip-link { position: absolute; left: -999px; top: 0; background: #fff; color: #000; padding: .75rem; z-index: 10; }
.skip-link:focus { left: .5rem; }
.site-header, .main-nav, .site-footer { padding: 1rem; border-bottom: 1px solid var(--border); }
.site-header { display: flex; justify-content: space-between; gap: 1rem; align-items: center; flex-wrap: wrap; }
.brand { font-size: 1.35rem; font-weight: 800; margin: 0; }
.subtitle { margin: .25rem 0 0; color: var(--muted); }
.main-nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.container { width: min(1180px, 100%); margin: 0 auto; padding: 1rem; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 1rem; margin: 1rem 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1rem; }
.form-stack { display: grid; gap: 1rem; max-width: 680px; }
.field { display: grid; gap: .35rem; }
label { font-weight: 700; }
input, select, button { font: inherit; padding: .75rem; border-radius: 8px; border: 2px solid var(--border); }
input, select { width: 100%; background: #fff; color: #000; }
button { cursor: pointer; background: #e0f2fe; color: #082f49; font-weight: 700; }
button:focus, input:focus, select:focus, a:focus { outline: 4px solid #facc15; outline-offset: 3px; }
.primary { background: #bfdbfe; }
.button-grid { display: flex; flex-wrap: wrap; gap: .75rem; }
.inline-form { display: inline; }
.spaced { display: block; margin: .35rem 0; }
.alert { padding: 1rem; border-radius: 10px; border: 2px solid currentColor; margin: 1rem 0; }
.alert.success { background: var(--ok); color: var(--okText); }
.alert.error { background: var(--err); color: var(--errText); }
pre { white-space: pre-wrap; word-break: break-word; background: #020617; color: #e2e8f0; padding: .75rem; border-radius: 8px; overflow: auto; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
caption { text-align: left; font-weight: 700; margin-bottom: .5rem; }
th, td { border: 1px solid var(--border); padding: .75rem; vertical-align: top; }
.hint { color: var(--muted); margin: 0; }
.site-footer { border-top: 1px solid var(--border); border-bottom: 0; color: var(--muted); }
.summary-list { display: grid; gap: .6rem; margin: 0; }
.summary-row { display: grid; gap: .15rem; padding-bottom: .6rem; border-bottom: 1px solid rgba(203, 213, 225, .35); }
.summary-row:last-child { border-bottom: 0; padding-bottom: 0; }
.summary-row dt { font-weight: 800; color: var(--muted); }
.summary-row dd { margin: 0; font-size: 1.05rem; }
.card h2 { margin-top: 0; }

.button-link {
    display: inline-block;
    padding: .65rem .9rem;
    border: 2px solid currentColor;
    border-radius: .5rem;
    text-decoration: none;
    font-weight: 700;
}

.track-list {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.track-item {
    border: 1px solid #64748b;
    border-radius: .65rem;
    padding: 1rem;
    background: rgba(255, 255, 255, .04);
}

.track-item input[type="checkbox"],
.choice input[type="radio"] {
    width: 1.25rem;
    height: 1.25rem;
    margin-right: .45rem;
    vertical-align: middle;
}

.track-item label,
.choice label {
    font-weight: 700;
}

.choice {
    margin: .7rem 0;
}

.muted {
    opacity: .85;
    font-size: .95rem;
    margin: .35rem 0 0;
}

hr {
    border: 0;
    border-top: 1px solid #64748b;
    margin: 1.5rem 0;
}

.notice {
    border: 1px solid #facc15;
    border-radius: .65rem;
    padding: .9rem 1rem;
    background: rgba(250, 204, 21, .12);
    color: #fef9c3;
    font-weight: 700;
}

.app-dialog {
    width: min(560px, calc(100% - 2rem));
    padding: 0;
    border: 3px solid #93c5fd;
    border-radius: 12px;
    background: #111827;
    color: #f8fafc;
}

.app-dialog::backdrop {
    background: rgba(2, 6, 23, .82);
}

.dialog-content {
    padding: 1.25rem;
}

.dialog-content h2 {
    margin-top: 0;
}

.dialog-message {
    max-height: 50vh;
    overflow: auto;
    white-space: normal;
}

.dialog-actions {
    display: flex;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: .75rem;
    margin-top: 1.25rem;
}

@media (max-width: 520px) {
    .dialog-actions {
        display: grid;
    }
}