:root {
    --bg: #0b141a;
    --card: #111b21;
    --border: #2a3942;
    --text: #e9edef;
    --muted: #8696a0;
    --green: #00a884;
    --warn: #f59e0b;
    --danger: #ef4444;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Segoe UI", system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

.header {
    padding: 1.5rem 1rem;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.header h1 { margin: 0 0 .25rem; font-size: 1.5rem; }

.muted { color: var(--muted); font-size: .9rem; }

.badge {
    display: inline-block;
    margin-top: .75rem;
    padding: .25rem .75rem;
    border-radius: 999px;
    font-size: .8rem;
}

.badge-ok { background: #14532d; color: #86efac; }
.badge-warn { background: #422006; color: #fcd34d; }
.badge-err { background: #450a0a; color: #fca5a5; }

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 1rem;
}

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}

.card h2 { margin: 0 0 1rem; font-size: 1.1rem; }

.form-row {
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
}

.form-stack label {
    display: block;
    margin: .5rem 0 .25rem;
    font-size: .85rem;
    color: var(--muted);
}

input, textarea, select {
    width: 100%;
    padding: .6rem .75rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
}

.form-row input { flex: 1; min-width: 180px; }

.btn {
    padding: .6rem 1rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
}

.btn-primary { background: var(--green); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: .35rem .6rem; font-size: .8rem; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.device-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem;
}

.device-card h3 { margin: 0 0 .25rem; font-size: 1rem; }

.device-meta { font-size: .8rem; color: var(--muted); margin-bottom: .75rem; }

.qr-wrap {
    background: #fff;
    padding: .75rem;
    border-radius: 8px;
    text-align: center;
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-wrap img { max-width: 200px; height: auto; }

.status-open { color: #86efac; }
.status-qr { color: #fcd34d; }
.status-close { color: #fca5a5; }

.device-actions {
    margin-top: .75rem;
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
}

.footer {
    text-align: center;
    padding: 1.5rem;
    font-size: .8rem;
    color: var(--muted);
    border-top: 1px solid var(--border);
}

.footer code {
    background: var(--card);
    padding: .1rem .35rem;
    border-radius: 4px;
}

.log {
    margin-top: .75rem;
    padding: .75rem;
    background: var(--bg);
    border-radius: 8px;
    font-size: .75rem;
    overflow-x: auto;
    white-space: pre-wrap;
}