/* Google Fonts Integration */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap');

/* CSS Variables for Premium Dark Glassmorphic Theme */
:root {
    --bg-main: #0B0F19;
    --bg-gradient: radial-gradient(circle at 50% 50%, #151d30 0%, #0B0F19 100%);
    --card-bg: rgba(20, 30, 48, 0.65);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-border-glow: rgba(0, 180, 216, 0.2);
    
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;

    --primary: #00B4D8;
    --primary-hover: #0077B6;
    --primary-glow: rgba(0, 180, 216, 0.4);
    
    --success: #10B981;
    --success-hover: #059669;
    --success-glow: rgba(16, 185, 129, 0.2);

    --danger: #EF4444;
    --danger-hover: #DC2626;
    --danger-glow: rgba(239, 68, 68, 0.2);

    --warning: #F59E0B;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: var(--card-border) var(--bg-main);
}

body {
    background: var(--bg-main);
    background-image: var(--bg-gradient);
    color: var(--text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: var(--card-border);
    border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* App Container */
.app-container {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Modern Glowing Grid Background */
.bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.08) 0%, rgba(0, 0, 0, 0) 70%);
    top: -10%;
    right: -10%;
    z-index: -1;
    pointer-events: none;
}

.bg-glow-2 {
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.05) 0%, rgba(0, 0, 0, 0) 70%);
    bottom: -10%;
    left: -10%;
    z-index: -1;
    pointer-events: none;
}

/* Login Layout */
.login-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    position: relative;
}

.login-card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 440px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.login-card:hover {
    border-color: var(--card-border-glow);
    box-shadow: 0 20px 45px rgba(0, 180, 216, 0.15);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header img {
    max-height: 70px;
    margin-bottom: 16px;
    filter: drop-shadow(0 4px 10px rgba(0, 180, 216, 0.3));
}

.login-header h2 {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

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

.form-label {
    display: block;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-control {
    width: 100%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 15px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.07);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-control::placeholder {
    color: var(--text-muted);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%239CA3AF'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 18px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    gap: 8px;
}

.btn-primary {
    background: var(--primary);
    color: #0b0f19;
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 0 15px var(--primary-glow);
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    border: 1px solid var(--card-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
}

.btn-success {
    background: var(--success);
    color: #0b0f19;
}

.btn-success:hover {
    background: var(--success-hover);
    box-shadow: 0 0 15px var(--success-glow);
    transform: translateY(-1px);
}

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

.btn-danger:hover {
    background: var(--danger-hover);
    box-shadow: 0 0 15px var(--danger-glow);
    transform: translateY(-1px);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 12px;
}

/* Header & Navigation */
.navbar {
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    padding: 16px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.brand-section img {
    height: 40px;
    object-fit: contain;
}

.brand-title {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-title span {
    color: var(--primary);
}

.user-nav-profile {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-badge {
    background: rgba(0, 180, 216, 0.1);
    border: 1px solid rgba(0, 180, 216, 0.2);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

/* Main Dashboard Area */
.dashboard-container {
    flex: 1;
    padding: 40px;
    max-width: 1600px;
    width: 100%;
    margin: 0 auto;
}

/* Dashboard Summary Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

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

.stat-info h3 {
    font-size: 13px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.stat-info p {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 24px;
}

/* Tab Panel Styles */
.tab-navigation {
    display: flex;
    border-bottom: 1px solid var(--card-border);
    margin-bottom: 32px;
    gap: 8px;
}

.tab-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 12px 24px;
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 2px solid transparent;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tab-content.active {
    display: block;
}

/* Grid & Tables for Management Panels */
.panel-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 32px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    margin-bottom: 32px;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 16px;
}

.panel-title {
    font-size: 20px;
    color: var(--text-primary);
}

/* Modern Tables styling */
.table-responsive {
    overflow-x: auto;
    width: 100%;
}

.custom-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.custom-table th {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 16px 20px;
    border-bottom: 1px solid var(--card-border);
}

.custom-table td {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    font-size: 14px;
}

.custom-table tr:hover td {
    background: rgba(255, 255, 255, 0.01);
}

/* Table statuses & pills */
.badge-status {
    display: inline-flex;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-status.active, .badge-status.authorized {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-status.inactive, .badge-status.unauthorized {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.badge-status.offline {
    background: rgba(107, 114, 128, 0.15);
    color: var(--text-secondary);
    border: 1px solid rgba(107, 114, 128, 0.2);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(7, 10, 18, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: #111827;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 500px;
    padding: 32px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: var(--transition);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 24px;
}

.modal-close:hover {
    color: var(--text-primary);
}

/* Alerts and Notifications */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideDown 0.3s ease;
}

.alert-success {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

/* Logo Preview Box */
.logo-upload-box {
    border: 2px dashed var(--card-border);
    padding: 20px;
    text-align: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 20px;
}

.logo-upload-box:hover {
    border-color: var(--primary);
    background: rgba(0, 180, 216, 0.02);
}

.logo-upload-preview {
    max-width: 150px;
    max-height: 100px;
    margin-top: 10px;
    border-radius: 4px;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive adjustments */
@media(max-width: 768px) {
    .navbar {
        padding: 16px 20px;
        flex-direction: column;
        gap: 16px;
    }
    
    .dashboard-container {
        padding: 20px;
    }
    
    .panel-card {
        padding: 20px;
    }
    
    .panel-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .btn {
        width: 100%;
    }
}

/* DHCP Servers Checkboxes Grid */
.dhcp-checkboxes-grid {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 16px;
    max-height: 180px;
    overflow-y: auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    margin-top: 8px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
}

.checkbox-item:hover {
    color: var(--primary);
}

.checkbox-item input[type="checkbox"] {
    accent-color: var(--primary);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* Premium Typographic Brand Logo */
.login-brand-title {
    font-family: 'Outfit', sans-serif;
    font-size: 34px;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: inline-block;
    position: relative;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.login-brand-title span {
    background: linear-gradient(135deg, var(--primary) 0%, #00E5FF 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 10px rgba(0, 180, 216, 0.45));
    font-weight: 800;
}