:root {
    color-scheme: dark;
    --bg: #12151a;
    --card: #1c222b;
    --text: #e7edf5;
    --muted: #93a0b0;
    --line: #2c3644;
    --accent: #7eb6ff;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font: 16px/1.45 system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
}
header, nav, main { padding: 16px 20px; }
header, nav {
    display: flex;
    gap: 12px;
    align-items: center;
    border-bottom: 1px solid var(--line);
}
nav button, button, input, select, textarea {
    font: inherit;
    color: var(--text);
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 8px 12px;
}
button { cursor: pointer; }
button.active { border-color: var(--accent); }
.card, .row {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
}
.row { display: flex; justify-content: space-between; gap: 12px; align-items: center; }
.muted { color: var(--muted); }
main.card { max-width: 420px; margin: 10vh auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); font-size: 14px; }
form { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 16px; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--muted); }
.error { color: #ffb4b4; }