:root{
    --bg:#0b0b0b;
    --fg:#eaeaea;
    --muted:#b8b8b8;
    --green:#00ff88;
    --green-dim:#22cc88;
    --card:#121212;
    --border:#262626;
    --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    --sans: Inter, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
    margin: 0; background: var(--bg); color: var(--fg);
    font-family: var(--sans); line-height: 1.4;
    display: grid; place-items: start center; padding: 32px 16px;
}
.wrap {
    width: min(1100px, 100%);
    display: grid; gap: 16px;
}
h1 { margin: 0 0 4px 0; font-size: 20px; font-weight: 600; }
p.sub { margin: 0 0 8px 0; color: var(--muted); font-size: 13px; }
.grid {
    display: grid; gap: 16px;
    grid-template-columns: 1fr;
}
@media (min-width: 900px){
    .grid { grid-template-columns: 1fr 360px; align-items: start; }
}
.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px;
}
label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
textarea, input[type="text"]{
    width: 100%;
    background: #0f0f0f;
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 12px;
    font: 13px/1.5 var(--mono);
    outline: none;
}
textarea:focus, input[type="text"]:focus { border-color: var(--green-dim); box-shadow: 0 0 0 2px #00ff8833; }
textarea { min-height: 240px; resize: vertical; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.btn {
    appearance: none; border: 1px solid var(--green);
    background: transparent; color: var(--green);
    padding: 10px 14px; border-radius: 999px; cursor: pointer;
    font-weight: 600; transition: transform .02s ease, background .15s ease, color .15s ease;
    user-select: none;
}
.btn:hover { background: #00ff8815; }
.btn:active { transform: translateY(1px); }
.btn.secondary {
    border-color: var(--border); color: var(--fg);
}
.hint { color: var(--muted); font-size: 12px; }
.count { color: var(--green); font-weight: 600; }
.error { color: #ff6b6b; font-size: 13px; }
.split { display: grid; gap: 16px; }
@media (min-width: 600px){
    .split { grid-template-columns: 1fr 1fr; }
}