:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-color: #3f51b5;
    --accent-hover: #303f9f;
    --error-color: #cf6679;
    --success-color: #4caf50;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Navbar */
.navbar {
    background-color: var(--card-bg);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
    text-decoration: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 20px;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--text-primary);
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* Forms */
.form-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-secondary);
}

input[type="text"], input[type="password"] {
    width: 100%;
    padding: 10px;
    background-color: #2c2c2c;
    border: 1px solid #333;
    border-radius: 4px;
    color: var(--text-primary);
    box-sizing: border-box;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    font-size: 1rem;
    transition: background 0.3s;
}

.btn:hover {
    background-color: var(--accent-hover);
}

.btn-danger {
    background-color: var(--error-color);
}
.btn-danger:hover {
    background-color: #b05565;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #333;
}

th {
    background-color: #252525;
    color: var(--text-secondary);
}

.status-active { color: var(--success-color); }
.status-blocked { color: var(--error-color); }

/* Utility */
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.alert { padding: 10px; border-radius: 4px; margin-bottom: 15px; }
.alert-error { background-color: rgba(207, 102, 121, 0.1); color: var(--error-color); border: 1px solid var(--error-color); }