:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --primary: #58a6ff;
    --primary-hover: #409eff;
    --text-main: #c9d1d9;
    --text-secondary: #8b949e;
    --border-color: #30363d;
    --success: #238636;
    --danger: #da3633;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    margin: 0;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

h1, h2, h3 {
    margin: 0;
    font-weight: 600;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s;
}

.btn-primary {
    background-color: var(--success);
    color: white;
}

.btn-primary:hover {
    background-color: #2ea043;
}

.btn-danger {
    background-color: var(--danger);
    color: white;
}

.form-group {
    margin-bottom: 1rem;
}

input[type="text"] {
    background: #0d1117;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.5rem;
    border-radius: 6px;
    width: 100%;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-connected { background: #238636; color: white; }
.badge-disconnected { background: #da3633; color: white; }

.qr-placeholder {
    width: 250px;
    height: 250px;
    background: #fff;
    margin: 1rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}