:root {
    --bg-deep: #05070a;
    --sidebar-bg: #0a0d14;
    --card-bg: rgba(16, 20, 28, 0.7);
    --glass-border: rgba(255, 255, 255, 0.08);
    --accent-blue: #00d2ff;
    --accent-purple: #9d50bb;
    --text-primary: #f0f2f5;
    --text-secondary: #94a3b8;
    --quantum-gradient: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    --sidebar-width: 280px;
    --radius-lg: 16px;
    --radius-md: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background: var(--bg-deep);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

/* Layout Grid */
.dashboard-wrapper {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    min-height: 100vh;
}

/* Sidebar Styling */
.sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid var(--glass-border);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: sticky;
    top: 0;
    height: 100vh;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-left: 0.5rem;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: var(--quantum-gradient);
    border-radius: 10px;
    display: grid;
    place-items: center;
    font-weight: 800;
    color: white;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-weight: 500;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.nav-link.active {
    background: rgba(0, 210, 255, 0.1);
    color: var(--accent-blue);
}

/* Main Content area */
.main-content {
    padding: 2rem;
    background: radial-gradient(circle at top right, rgba(0, 210, 255, 0.05), transparent 40%);
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.page-title h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.page-title p {
    color: var(--text-secondary);
}

/* Reusable Components */
.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: var(--transition);
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.btn-quantum {
    background: var(--quantum-gradient);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-quantum:hover {
    opacity: 0.9;
    box-shadow: 0 0 20px rgba(0, 210, 255, 0.3);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* Hamburger Menu Button */
.hamburger-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    width: auto;
    border-radius: 8px;
    transition: var(--transition);
}

.hamburger-btn:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* Sidebar Overlay Backdrop */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 99;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
}

/* Responsive — Tablet */
@media (max-width: 1024px) {
    .dashboard-wrapper {
        grid-template-columns: 80px 1fr;
    }
    .brand-name, .nav-text {
        display: none;
    }
    .sidebar {
        padding: 2rem 1rem;
        align-items: center;
    }
}

/* Responsive — Mobile */
@media (max-width: 768px) {
    .dashboard-wrapper {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 280px;
        height: 100vh;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        padding: 2rem 1.5rem;
        align-items: flex-start;
        box-shadow: none;
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 30px rgba(0, 0, 0, 0.5);
    }

    .brand-name, .nav-text {
        display: inline;
    }

    .sidebar-overlay.active {
        display: block;
        opacity: 1;
    }

    .hamburger-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .main-content {
        padding: 1rem;
    }

    .top-bar {
        margin-bottom: 1.5rem;
    }

    .page-title h1 {
        font-size: 1.4rem;
    }

    .page-title p {
        font-size: 0.85rem;
    }

    .glass-card {
        padding: 1.25rem;
        border-radius: 12px;
    }
}