:root {
    /* Light Mode Colors */
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #e0e7ff;

    --background-color: #f8fafc;
    --background-gradient: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    --sidebar-bg: rgba(255, 255, 255, 0.95);
    --card-bg: rgba(255, 255, 255, 0.9);

    --text-main: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --border-color: #e2e8f0;

    --success-bg: #dcfce7;
    --success-text: #166534;
    --danger-bg: #fee2e2;
    --danger-text: #991b1b;

    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-colored: 0 10px 25px -5px rgba(99, 102, 241, 0.3);

    --radius: 0.75rem;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    --blur: blur(12px);
}

/* Dark Mode */
[data-theme="dark"] {
    --primary-color: #818cf8;
    --primary-hover: #6366f1;
    --primary-light: #312e81;

    --background-color: #0f172a;
    --background-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    --sidebar-bg: rgba(30, 41, 59, 0.95);
    --card-bg: rgba(30, 41, 59, 0.8);

    --text-main: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;

    --border-color: #334155;

    --success-bg: #14532d;
    --success-text: #86efac;
    --danger-bg: #7f1d1d;
    --danger-text: #fca5a5;

    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-colored: 0 10px 25px -5px rgba(129, 140, 248, 0.4);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--background-gradient);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Layout */
.layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar with Glassmorphism */
.sidebar {
    width: 260px;
    background: var(--sidebar-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    box-shadow: var(--shadow-md);
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 20px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-muted);
}

.brand {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    margin-bottom: 2.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.brand:hover {
    transform: scale(1.05);
}

.nav-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
    margin: 1.5rem 0 0.75rem;
    letter-spacing: 0.1em;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 0.5rem;
    margin-bottom: 0.25rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--primary-color);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.nav-link:hover {
    background: var(--background-color);
    color: var(--text-main);
    transform: translateX(4px);
}

.nav-link:hover::before {
    transform: scaleY(1);
}

.nav-link.active {
    background: var(--primary-light);
    color: var(--primary-color);
    font-weight: 600;
}

.nav-link.active::before {
    transform: scaleY(1);
}

/* Main Content */
.content {
    flex-grow: 1;
    padding: 2.5rem;
    background: var(--background-gradient);

    position: relative;
}

.content::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

/* Typography */
h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-main);
    margin: 0;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--text-main) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-main);
}

/* Cards with Glassmorphism */
.card {
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), #ec4899);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-colored);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--text-main);
    line-height: 1;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--primary-color) 0%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Tables */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
}

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

th {
    background-color: var(--background-color);
    padding: 1rem 1.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
}

td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: var(--transition);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background-color: var(--background-color);
    color: var(--text-main);
}

/* Zebra striping */
tbody tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] tbody tr:nth-child(even) {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Apps Table Column Widths */
#apps-table {
    table-layout: fixed;
}

#apps-table th:nth-child(1),
#apps-table td:nth-child(1) {
    width: 30%;
}

#apps-table th:nth-child(2),
#apps-table td:nth-child(2) {
    width: 55%;
}

#apps-table th:nth-child(3),
#apps-table td:nth-child(3) {
    width: 15%;
}

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.875rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-sm);
}

.status-online {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.status-offline {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #8b5cf6 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-colored);
}

.btn-gradient-purple {
    background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
    color: white;
}

.btn-gradient-green {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.btn-gradient-red {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.btn-gradient-purple:hover,
.btn-gradient-green:hover,
.btn-gradient-red:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 9999;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: var(--shadow-colored);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.content {
    animation: fadeIn 0.5s ease-out;
}

.nav-link {
    animation: slideIn 0.3s ease-out backwards;
}

.nav-link:nth-child(1) {
    animation-delay: 0.05s;
}

.nav-link:nth-child(2) {
    animation-delay: 0.1s;
}

.nav-link:nth-child(3) {
    animation-delay: 0.15s;
}

.nav-link:nth-child(4) {
    animation-delay: 0.2s;
}

.nav-link:nth-child(5) {
    animation-delay: 0.25s;
}

/* Mobile */
.mobile-header {
    display: none;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.mobile-toggle {
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    padding: 0;
    display: flex;
}

.mobile-toggle svg {
    width: 24px;
    height: 24px;
}

.mobile-brand {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 40;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

@media (max-width: 768px) {
    .layout {
        flex-direction: column;
    }

    .mobile-header {
        display: flex;
    }

    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: 50;
        width: 280px;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .content {
        padding: 1.5rem;
    }

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

    .theme-toggle {
        bottom: 1rem;
        right: 1rem;
        width: 48px;
        height: 48px;
    }
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Device Actions */
.device-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.info-card {
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.info-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.info-card h3 {
    margin: 0 0 1.25rem 0;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    color: var(--text-muted);
    font-weight: 500;
}

.info-value {
    font-weight: 700;
    color: var(--text-main);
    font-family: 'Courier New', monospace;
}

/* Sticky Header */
.sticky-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--card-bg);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    padding: 1.5rem 0;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sticky-header h1 {
    margin: 0;
}