:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --info-color: #3498db;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --background-dark: #1a1a1a;
    --surface-dark: #2d2d2d;
    --surface-light: #3d3d3d;
}

body {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #fff;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.main-container {
    min-height: 100vh;
    display: flex;
}

.sidebar {
    width: 250px;
    background: var(--surface-dark);
    padding: 1rem;
    border-right: 1px solid #444;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    transition: width 0.3s ease;
    z-index: 1000;
}

.sidebar.collapsed {
    width: 60px;
}

.sidebar-text {
    transition: opacity 0.3s ease;
}

.sidebar.collapsed .sidebar-text {
    opacity: 0;
    display: none;
}

.sidebar-header h5 {
    transition: opacity 0.3s ease;
}

.sidebar.collapsed .sidebar-header h5 {
    opacity: 0;
    display: none;
}

.sidebar-header {
    text-align: center;
    padding: 1rem 0;
    border-bottom: 1px solid #444;
    margin-bottom: 1rem;
}

.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav li {
    margin: 0.5rem 0;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar.collapsed .sidebar-nav a {
    padding: 0.75rem 0.5rem;
    justify-content: center;
}

.sidebar-nav a:hover {
    background: var(--surface-light);
}

.sidebar:not(.collapsed) .sidebar-nav a:hover {
    transform: translateX(5px);
}

.sidebar-nav a.active {
    background: var(--info-color);
}

.sidebar-nav i {
    margin-right: 0.75rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
    transition: margin-right 0.3s ease;
}

.sidebar.collapsed .sidebar-nav i {
    margin-right: 0;
}

.content {
    flex: 1;
    margin-left: 250px;
    padding: 2rem;
    transition: margin-left 0.3s ease;
}

.content.expanded {
    margin-left: 60px;
}

.header {
    background: var(--surface-dark);
    padding: 1rem 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.header .text-muted {
    color: #bbb !important;
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface-dark);
    padding: 1.5rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.stat-card.online i {
    color: var(--success-color);
}

.stat-card.offline i {
    color: var(--danger-color);
}

.stat-card.bridge i {
    color: var(--warning-color);
}

.stat-card.signal i {
    color: var(--info-color);
}

.modems-table {
    background: var(--surface-dark);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.table-dark {
    --bs-table-bg: transparent;
}

.table-dark th {
    background: var(--surface-light);
    border-color: #444;
}

.table-dark td {
    border-color: #444;
    vertical-align: middle;
}

.modem-row {
    cursor: pointer;
    transition: all 0.3s ease;
}

.modem-row:hover {
    background: rgba(52, 152, 219, 0.1) !important;
}

.modem-row.expanded {
    background: rgba(52, 152, 219, 0.2) !important;
}

.modem-details {
    background: var(--surface-light);
    padding: 1.5rem;
    border-radius: 10px;
    margin: 1rem 0;
}

.signal-bars {
    display: inline-flex;
    align-items: flex-end;
    gap: 2px;
    height: 20px;
}

.signal-bar {
    width: 4px;
    background: #444;
    border-radius: 2px 2px 0 0;
    transition: all 0.3s ease;
}

.signal-bar.active {
    background: var(--success-color);
}

.signal-bar.medium {
    background: var(--warning-color);
}

.signal-bar.weak {
    background: var(--danger-color);
}

.signal-bar.good {
    background: var(--success-color);
}

.signal-bar.fair {
    background: var(--warning-color);
}

.signal-bar.poor {
    background: var(--danger-color);
}

.status-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
}

.status-online {
    background: var(--success-color);
    color: white;
}

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

.btn-custom {
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.btn-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

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

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

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

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

.modal-dark .modal-content {
    background: var(--surface-dark);
    border: 1px solid #444;
}

.modal-dark .modal-header {
    border-bottom: 1px solid #444;
}

.modal-dark .modal-footer {
    border-top: 1px solid #444;
}

.form-control-dark {
    background: var(--surface-light);
    border: 1px solid #444;
    color: #fff;
}

.form-control-dark:focus {
    background: var(--surface-light);
    border-color: var(--info-color);
    color: #fff;
    box-shadow: 0 0 0 0.2rem rgba(52, 152, 219, 0.25);
}

.form-text-dark {
    color: #ffffffa2;
}

.loading-spinner {
    display: none;
    text-align: center;
    padding: 2rem;
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.cursor-pointer {
    cursor: pointer;
}

/* Toast notifications */
.toast {
    background: var(--surface-dark) !important;
    border: 1px solid #444;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.toast-header {
    background: var(--surface-light) !important;
    border-bottom: 1px solid #444;
    color: #fff !important;
}

.toast-header.bg-success {
    background: var(--success-color) !important;
}

.toast-header.bg-danger {
    background: var(--danger-color) !important;
}

.toast-header.bg-warning {
    background: var(--warning-color) !important;
    color: #000 !important;
}

.toast-header.bg-info {
    background: var(--info-color) !important;
}

.toast-body {
    background: var(--surface-dark);
    color: #fff;
    border: none;
}

/* Refresh indicator */
.refresh-indicator {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--info-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    z-index: 1050;
    display: none;
    animation: fadeInOut 2s ease-in-out;
}

/* Password reveal on hover */
.password-hidden {
    cursor: pointer;
    user-select: none;
    padding: 2px 4px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    position: relative;
}

.password-hidden:hover {
    background: rgba(255, 255, 255, 0.2);
}

.password-hidden:active {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0.98);
}

/* Copy to clipboard styling */
.copy-to-clipboard {
    cursor: pointer;
    user-select: none;
    padding: 2px 4px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
    position: relative;
}

.copy-to-clipboard:hover {
    background: rgba(255, 255, 255, 0.15);
}

.copy-to-clipboard:active {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(0.98);
}

.copy-to-clipboard::after {
    content: "📋";
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity 0.3s ease;
    font-size: 0.8em;
}

.copy-to-clipboard:hover::after {
    opacity: 0.6;
}

@keyframes fadeInOut {
    0% { opacity: 0; transform: translateX(-50%) translateY(-10px); }
    20% { opacity: 1; transform: translateX(-50%) translateY(0); }
    80% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(-10px); }
}

@media (max-width: 768px) {
    /* Hide hamburger button on mobile since sidebar is on top */
    #sidebarToggle {
        display: none !important;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: static;
        z-index: 1001;
        border-right: none;
        border-bottom: 1px solid #444;
    }
    
    .sidebar.collapsed {
        height: 60px;
        overflow: hidden;
    }
    
    .sidebar.collapsed .sidebar-header,
    .sidebar.collapsed .sidebar-nav li:not(:first-child) {
        display: none;
    }
    
    .sidebar.collapsed .sidebar-nav {
        display: flex;
        justify-content: space-around;
        align-items: center;
        height: 60px;
        margin: 0;
    }
    
    .sidebar.collapsed .sidebar-nav li {
        margin: 0;
    }
    
    .sidebar.collapsed .sidebar-nav a {
        padding: 0.5rem;
        border-radius: 50%;
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .content {
        margin-left: 0;
        padding: 1rem;
    }
    
    .main-container {
        flex-direction: column;
    }
    
    .stats-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .modems-table {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        border-radius: 15px;
    }
    
    .table {
        min-width: 800px;
        margin: 0;
    }
    
    .table th,
    .table td {
        white-space: nowrap;
        padding: 0.5rem;
        font-size: 0.9rem;
    }
    
    .btn-group .btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.8rem;
    }
    
    .header {
        padding: 1rem;
    }
    
    .header .d-flex {
        flex-direction: column;
        gap: 1rem;
    }
}