:root {
    --primary-red: #dc143c;
    --dark-red: #8b0000;
    --light-red: #ff6b6b;
    --black: #0a0a0a;
    --dark-gray: #1a1a1a;
    --medium-gray: #2a2a2a;
    --light-gray: #3a3a3a;
    --white: #ffffff;
    --off-white: #f5f5f5;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--black);
    color: var(--white);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--dark-gray) 0%, var(--black) 100%);
    border-bottom: 3px solid var(--primary-red);
    padding: 20px 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    color: var(--white);
    font-size: 2rem;
    font-weight: 700;
}

h1 .red {
    color: var(--primary-red);
}

nav {
    display: flex;
    gap: 20px;
}

nav a, .btn {
    color: var(--white);
    text-decoration: none;
    padding: 10px 20px;
    background-color: var(--medium-gray);
    border: 2px solid var(--primary-red);
    border-radius: 5px;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 0.95rem;
}

nav a:hover, .btn:hover {
    background-color: var(--primary-red);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(220, 20, 60, 0.3);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.stat-card {
    background: linear-gradient(135deg, var(--dark-gray) 0%, var(--medium-gray) 100%);
    border: 2px solid var(--primary-red);
    border-radius: 10px;
    padding: 25px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(220, 20, 60, 0.4);
    border-color: var(--light-red);
}

.stat-card h3 {
    color: var(--off-white);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.stat-card .stat-value {
    color: var(--primary-red);
    font-size: 2.5rem;
    font-weight: bold;
    margin: 10px 0;
}

.stat-card .stat-label {
    color: var(--off-white);
    font-size: 0.85rem;
}

/* Tables */
.table-container {
    background-color: var(--dark-gray);
    border: 2px solid var(--primary-red);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    overflow-x: auto;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

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

thead {
    background-color: var(--medium-gray);
    border-bottom: 2px solid var(--primary-red);
}

th {
    padding: 15px;
    text-align: left;
    color: var(--primary-red);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
}

td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--light-gray);
    color: var(--off-white);
}

tbody tr {
    transition: background-color 0.2s ease;
}

tbody tr:hover {
    background-color: var(--medium-gray);
}

/* Status badges */
.status {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status.active {
    background-color: var(--dark-red);
    color: var(--white);
    border: 1px solid var(--primary-red);
}

.status.inactive {
    background-color: var(--light-gray);
    color: var(--off-white);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: var(--dark-red);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(220, 20, 60, 0.4);
}

.btn-secondary {
    background-color: var(--medium-gray);
    color: var(--white);
    border: 2px solid var(--primary-red);
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background-color: var(--light-gray);
    border-color: var(--light-red);
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--off-white);
    font-weight: 500;
}

input, select, textarea {
    width: 100%;
    padding: 12px;
    background-color: var(--medium-gray);
    border: 2px solid var(--light-gray);
    border-radius: 5px;
    color: var(--white);
    font-size: 1rem;
    transition: all 0.3s ease;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-red);
    box-shadow: 0 0 10px rgba(220, 20, 60, 0.3);
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--black) 0%, var(--dark-gray) 100%);
}

.login-box {
    background-color: var(--dark-gray);
    border: 3px solid var(--primary-red);
    border-radius: 15px;
    padding: 40px;
    max-width: 400px;
    width: 100%;
    box-shadow: 0 10px 30px rgba(220, 20, 60, 0.3);
}

.login-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-red);
    font-size: 2rem;
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    border-left: 4px solid;
}

.alert-success {
    background-color: rgba(220, 20, 60, 0.2);
    border-color: var(--primary-red);
    color: var(--white);
}

.alert-error {
    background-color: rgba(139, 0, 0, 0.3);
    border-color: var(--dark-red);
    color: var(--white);
}

.alert-info {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--off-white);
    color: var(--white);
}

/* Loading spinner */
.spinner {
    border: 4px solid var(--light-gray);
    border-top: 4px solid var(--primary-red);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* IP Details */
.ip-detail {
    background-color: var(--medium-gray);
    border-left: 4px solid var(--primary-red);
    padding: 15px;
    margin: 10px 0;
    border-radius: 5px;
}

.ip-detail strong {
    color: var(--primary-red);
}

/* Chart container */
.chart-container {
    background-color: var(--dark-gray);
    border: 2px solid var(--primary-red);
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    min-height: 300px;
}

/* Responsive */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 20px;
    }

    nav {
        flex-direction: column;
        width: 100%;
    }

    nav a {
        text-align: center;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    table {
        font-size: 0.9rem;
    }

    th, td {
        padding: 10px;
    }
}

/* Code/monospace text */
code, .monospace {
    font-family: 'Courier New', Courier, monospace;
    background-color: var(--medium-gray);
    padding: 2px 6px;
    border-radius: 3px;
    color: var(--light-red);
}

/* Section headers */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 30px 0 20px 0;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-red);
}

.section-header h2 {
    color: var(--white);
    font-size: 1.8rem;
}

/* Connection status indicator */
.status-indicator {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 8px;
}

.status-indicator.connected {
    background-color: var(--primary-red);
    box-shadow: 0 0 10px var(--primary-red);
}

.status-indicator.disconnected {
    background-color: var(--light-gray);
}

/* Tab Navigation */
nav a.active {
    background-color: var(--primary-red);
    border-color: var(--dark-red);
}

/* Filter Grid */
.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.filter-item {
    display: flex;
    flex-direction: column;
}

.filter-item label {
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--off-white);
}

.filter-item input[type="text"],
.filter-item select {
    padding: 8px 12px;
    background-color: var(--light-gray);
    border: 2px solid var(--medium-gray);
    border-radius: 5px;
    color: var(--white);
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.filter-item input[type="text"]:focus,
.filter-item select:focus {
    outline: none;
    border-color: var(--primary-red);
    box-shadow: 0 0 5px rgba(220, 20, 60, 0.3);
}

/* Tab Content */
.tab-content {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}