:root {
    color-scheme: dark;
    --bg: #0e1116;
    --panel: #161b22;
    --panel-2: #1c232c;
    --border: #2a313c;
    --text: #e7edf3;
    --muted: #8b949e;
    --accent: #58a6ff;
    --ok: #3fb950;
    --warn: #d29922;
    --err: #f85149;
    --radius: 10px;
    --gap: 0.75rem;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 1rem;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.45;
    background: var(--bg);
    color: var(--text);
}

main {
    max-width: 540px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--gap);
}

header h1 {
    font-size: 1.25rem;
    margin: 0 0 0.25rem 0;
}

header p {
    margin: 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.85rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.panel h2 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
    margin: 0;
    font-weight: 600;
}

.row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.row label {
    flex: 1;
    min-width: 0;
}

.row .label-main {
    display: block;
    font-size: 0.95rem;
}

.row .label-sub {
    display: block;
    color: var(--muted);
    font-size: 0.78rem;
}

input[type="number"] {
    width: 6.5rem;
    padding: 0.45rem 0.55rem;
    background: var(--panel-2);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

input[type="number"]:focus {
    outline: 2px solid var(--accent);
    outline-offset: -1px;
}

button {
    appearance: none;
    border: 1px solid var(--border);
    background: var(--panel-2);
    color: var(--text);
    font-size: 1rem;
    font-weight: 500;
    padding: 0.85rem 1rem;
    border-radius: 8px;
    min-height: 44px;
    cursor: pointer;
    transition: background 0.1s ease, border-color 0.1s ease;
}

button:hover:not(:disabled) { background: #232c38; }
button:active:not(:disabled) { background: #2c3744; }

button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

button.primary { background: var(--accent); color: #0b1421; border-color: var(--accent); }
button.primary:hover:not(:disabled) { background: #79b8ff; }
button.danger { background: #2c1b1b; border-color: #5a2a2a; color: #ffb4b4; }
button.danger:hover:not(:disabled) { background: #3a2222; }

.buttons {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.5rem;
}

@media (min-width: 480px) {
    .buttons { grid-template-columns: 1fr 1fr; }
    .buttons .full { grid-column: 1 / -1; }
}

.help {
    font-size: 0.88rem;
    color: var(--text);
    margin: 0;
}

.help code {
    background: var(--panel-2);
    padding: 0.05rem 0.3rem;
    border-radius: 4px;
    font-family: ui-monospace, Menlo, monospace;
    font-size: 0.82rem;
}

ol.help {
    padding-left: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.status {
    font-size: 0.85rem;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
}

.status .ok { color: var(--ok); }
.status .warn { color: var(--warn); }
.status .err { color: var(--err); }

.state-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.2rem 0.85rem;
    font-size: 0.85rem;
    font-variant-numeric: tabular-nums;
}

.state-grid dt { color: var(--muted); }
.state-grid dd { margin: 0; }

#log {
    font-family: ui-monospace, Menlo, monospace;
    font-size: 0.78rem;
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.5rem 0.65rem;
    max-height: 9rem;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

#log .ts { color: var(--muted); }
#log .err { color: var(--err); }
#log .ok { color: var(--ok); }

.hidden { display: none !important; }

.picker {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.picker button {
    text-align: left;
}