:root {
    --bg: #0A0A0A;
    --bg2: #121212;
    --card: #181818;
    --border: #292929;
    --text: #F5F5F5;
    --dim: #A3A3A3;
    --accent: #8B5CF6;
    --accent2: #A78BFA;
    --danger: #EF4444;
    --success: #22c55e;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.45 -apple-system, Segoe UI, Roboto, sans-serif; }
body.center { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
header { display: flex; align-items: center; padding: 14px 22px; background: var(--bg2); border-bottom: 1px solid var(--border); gap: 12px; }
h1 { font-size: 18px; letter-spacing: 2px; margin: 0; color: var(--accent); }
h2 { font-size: 12px; letter-spacing: 1px; margin: 0 0 12px; color: var(--dim); text-transform: uppercase; }
.dim { color: var(--dim); }
.err { color: var(--danger); min-height: 18px; font-size: 12px; margin: 0; }
main { padding: 22px; display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px; max-width: 1200px; margin: 0 auto; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 18px; }
.card.login { width: 320px; display: flex; flex-direction: column; gap: 12px; text-align: center; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--dim); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 10px; }
input, select { background: var(--bg2); color: var(--text); border: 1px solid var(--border); padding: 8px 10px; border-radius: 4px; font: inherit; outline: none; }
input:focus, select:focus { border-color: var(--accent); }
input[type=range] { width: 100%; accent-color: var(--accent); }
button { background: var(--accent); color: #fff; border: 0; padding: 10px 16px; border-radius: 4px; font-weight: 700; cursor: pointer; letter-spacing: 0.5px; }
button:hover { background: var(--accent2); }
button.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
.toggle { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--border); }
.toggle:last-child { border-bottom: 0; }
.toggle .name { font-size: 13px; color: var(--text); }
.toggle .desc { font-size: 11px; color: var(--dim); margin-top: 2px; }
.switch { position: relative; width: 44px; height: 24px; background: #292929; border-radius: 12px; cursor: pointer; transition: background 0.15s; }
.switch.on { background: var(--accent); }
.switch::after { content: ''; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; background: #fff; border-radius: 50%; transition: left 0.15s; }
.switch.on::after { left: 23px; }
.grouped { display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; padding: 8px 0; }
.grouped input[type=number], .grouped select { width: 80px; padding: 6px 8px; font-size: 12px; }
.status { display: inline-block; padding: 3px 8px; border-radius: 4px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
.status.ok { background: rgba(34,197,94,0.15); color: var(--success); }
.status.off { background: rgba(163,163,163,0.15); color: var(--dim); }