* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #050505;
    color: #ffffff;
}

a {
    color: #39ff14;
    text-decoration: none;
}

.header {
    background: #0d0d0d;
    border-bottom: 1px solid #39ff14;
    padding: 22px;
    text-align: center;
}

.header h1 {
    margin: 0;
    color: #39ff14;
    font-size: 28px;
}

.header p {
    margin: 8px 0 0;
    color: #ccc;
}

.container {
    max-width: 1100px;
    margin: 30px auto;
    padding: 20px;
}

.card {
    background: #111;
    border: 1px solid #222;
    border-radius: 14px;
    padding: 22px;
    margin-bottom: 20px;
    box-shadow: 0 0 20px rgba(57, 255, 20, 0.08);
}

.card h2, .card h3 {
    margin-top: 0;
    color: #39ff14;
}

input, select, textarea {
    width: 100%;
    padding: 13px;
    margin: 8px 0 15px;
    border: 1px solid #333;
    border-radius: 10px;
    background: #050505;
    color: #fff;
}

textarea {
    min-height: 130px;
}

button, .btn {
    display: inline-block;
    background: #39ff14;
    color: #000;
    border: none;
    padding: 12px 18px;
    border-radius: 10px;
    font-weight: bold;
    cursor: pointer;
}

button:hover, .btn:hover {
    background: #2bd80f;
}

.btn-secondary {
    background: #222;
    color: #fff;
    border: 1px solid #39ff14;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
}

.device-card {
    border: 1px solid #333;
    border-radius: 14px;
    padding: 18px;
    background: #080808;
}

.device-card strong {
    color: #39ff14;
}

.notice {
    padding: 14px;
    border-radius: 10px;
    background: #102010;
    border: 1px solid #39ff14;
    margin-bottom: 18px;
}

.error {
    padding: 14px;
    border-radius: 10px;
    background: #2a0d0d;
    border: 1px solid #ff4444;
    margin-bottom: 18px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #080808;
}

th, td {
    padding: 12px;
    border-bottom: 1px solid #222;
    text-align: left;
}

th {
    color: #39ff14;
}

.admin-nav {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 25px;
}

.small {
    color: #aaa;
    font-size: 13px;
}

.badge {
    background: #222;
    color: #39ff14;
    padding: 5px 9px;
    border-radius: 8px;
    font-size: 12px;
}