:root {
    color-scheme: light;
    --bg: #f8fafc;
    --ink: #0f172a;
    --muted: #475569;
    --line: #e2e8f0;
    --card: #ffffff;
    --accent: #1d4ed8;
    --error: #991b1b;
    --error-bg: #fee2e2;
    --warn: #92400e;
    --warn-bg: #fef3c7;
    --ok: #166534;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.45;
}

body { padding: 28px 18px 48px; }

.wrap { max-width: 980px; margin: 0 auto; }

h1 {
    margin: 0 0 6px;
    font-size: 28px;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.lede { margin: 0 0 22px; color: var(--muted); max-width: 62ch; }

.layout {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: 20px;
    align-items: start;
}

.panel {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 16px;
}

label.field { display: block; margin: 0 0 14px; font-weight: 650; }

label.field span.lbl { display: block; margin-bottom: 4px; }

select, input[type="text"] {
    width: 100%;
    margin-top: 2px;
    padding: 8px 10px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    background: #fff;
    color: var(--ink);
    font: inherit;
    font-weight: 450;
}

select:focus, input:focus, button:focus-visible {
    outline: 3px solid #bfdbfe;
    outline-offset: 1px;
}

.help { margin: 6px 0 0; color: var(--muted); font-weight: 450; font-size: 14px; }

.shared {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.result-name {
    margin: 8px 0;
    font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.25;
    word-break: break-word;
}

.eyebrow {
    margin: 0;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
}

.pattern, .count, .note { margin: 8px 0; color: var(--muted); font-size: 14px; }

ul.plain { margin: 8px 0; padding-left: 18px; }

ul.plain li { margin: 4px 0; }

.msg {
    margin: 8px 0;
    padding: 8px 10px;
    border-radius: 6px;
    font-size: 14px;
}

.msg.error { background: var(--error-bg); color: var(--error); }
.msg.warn { background: var(--warn-bg); color: var(--warn); }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }

button {
    font: inherit;
    font-weight: 650;
    border: 1px solid #cbd5e1;
    background: #fff;
    color: var(--ink);
    border-radius: 6px;
    padding: 8px 10px;
    cursor: pointer;
}

button.primary { background: var(--ink); color: #fff; border-color: var(--ink); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.examples { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.examples button { font-weight: 600; }

.guidance { margin-top: 22px; }
.guidance h2 { font-size: 16px; margin: 0 0 8px; }
.guidance p { margin: 0 0 8px; max-width: 78ch; }

details { margin-top: 16px; }
details summary { cursor: pointer; font-weight: 700; }
details ul { max-width: 78ch; }

.privacy { margin-top: 18px; color: var(--muted); font-size: 13px; }

@media (max-width: 800px) {
    .layout, .shared { grid-template-columns: 1fr; }
    h1 { font-size: 24px; }
    .result-name { font-size: 20px; }
}