/* ==========================================================================
           1. CSS Variables & Global Reset
           ========================================================================== */
        :root {
            --bg-main: #020617;
            --bg-card: rgba(15, 23, 42, 0.7);
            --bg-card-hover: rgba(30, 41, 59, 0.8);
            --header-bg: rgba(15, 23, 42, 0.85);
            --dropdown-bg: rgba(15, 23, 42, 0.95);
            --border-color: rgba(51, 65, 85, 0.6);
            --border-highlight: rgba(71, 85, 105, 0.8);
            
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
            --text-subtle: #64748b;
            
            --primary: #3b82f6;
            --primary-hover: #2563eb;
            --primary-glow: rgba(59, 130, 246, 0.25);
            
            --font-family: 'Plus Jakarta Sans', sans-serif;
            --max-width: 1280px;

            /* High Z-Index Hierarchy */
            --z-header: 9999;
            --z-dropdown: 9998;
            --z-backdrop: 9997;
            --z-toast: 10000;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-main);
            color: var(--text-main);
            font-family: var(--font-family);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            line-height: 1.5;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        /* Focus states for accessibility */
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        /* ==========================================================================
           2. Top Navigation Header (High Z-Index)
           ========================================================================== */
        .nav-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            width: 100%;
            height: 72px;
            background-color: var(--header-bg);
            border-bottom: 1px solid var(--border-color);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            z-index: var(--z-header);
            display: flex;
            align-items: center;
        }

        .header-container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        /* Brand Logo */
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            border-radius: 0.5rem;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 0.75rem;
            background: linear-gradient(135deg, #2563eb, #6366f1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-size: 1.25rem;
            box-shadow: 0 4px 12px var(--primary-glow);
            transition: transform 0.3s ease;
        }

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

        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            background: linear-gradient(to right, #ffffff, #cbd5e1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .logo-text span {
            -webkit-text-fill-color: var(--primary);
        }

        /* Desktop Links */
        .desktop-nav {
            display: none;
            align-items: center;
            gap: 0.25rem;
            background-color: rgba(30, 41, 59, 0.4);
            padding: 0.375rem;
            border-radius: 9999px;
            border: 1px solid var(--border-color);
        }

        .desktop-link {
            padding: 0.5rem 1rem;
            border-radius: 9999px;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: color 0.2s ease, background-color 0.2s ease;
        }

        .desktop-link:hover, .desktop-link.active {
            color: #ffffff;
            background-color: rgba(59, 130, 246, 0.15);
        }

        /* Right Actions */
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn-cta {
            display: none;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1rem;
            border-radius: 0.75rem;
            font-size: 0.875rem;
            font-weight: 600;
            color: #ffffff;
            background-color: var(--primary);
            box-shadow: 0 4px 14px var(--primary-glow);
            transition: background-color 0.2s ease, transform 0.15s ease;
        }

        .btn-cta:hover {
            background-color: var(--primary-hover);
        }

        .btn-cta:active {
            transform: scale(0.98);
        }

        /* Animated Hamburger Button */
        .menu-toggle-btn {
            width: 44px;
            height: 44px;
            border-radius: 0.75rem;
            background-color: #1e293b;
            border: 1px solid var(--border-highlight);
            color: var(--text-main);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background-color 0.2s ease, border-color 0.2s ease;
        }

        .menu-toggle-btn:hover {
            background-color: #334155;
        }

        .hamburger-svg {
            width: 24px;
            height: 24px;
            fill: currentColor;
        }

        .hamburger-line {
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
            transform-origin: center;
        }

        /* Hamburger to 'X' Transformation Styles */
        .menu-open .line-1 {
            transform: translateY(6px) rotate(45deg);
        }

        .menu-open .line-2 {
            opacity: 0;
            transform: scaleX(0);
        }

        .menu-open .line-3 {
            transform: translateY(-6px) rotate(-45deg);
        }

        /* ==========================================================================
           3. Dropdown Menu Overlay (High Z-Index Layer)
           ========================================================================== */
        .dropdown-menu {
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            width: 100%;
            max-height: calc(100vh - 80px);
            overflow-y: auto;
            background-color: var(--dropdown-bg);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            padding: 1.5rem 1rem;
            z-index: var(--z-dropdown);
            
            /* Animated Slide & Fade */
            opacity: 0;
            visibility: hidden;
            transform: translateY(-16px);
            transition: opacity 0.3s ease, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s ease;
        }

        .dropdown-menu.is-active {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-container {
            max-width: 900px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        .menu-section-title {
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-subtle);
            margin-bottom: 0.75rem;
            padding-left: 0.5rem;
        }

        .menu-list {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .menu-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 0.875rem 1rem;
            border-radius: 0.875rem;
            background-color: transparent;
            border: 1px solid transparent;
            transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
        }

        .menu-item:hover {
            background-color: var(--bg-card-hover);
            border-color: var(--border-color);
            transform: translateX(4px);
        }

        .menu-icon-box {
            width: 42px;
            height: 42px;
            border-radius: 0.625rem;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.125rem;
            flex-shrink: 0;
            transition: background-color 0.2s ease, color 0.2s ease;
        }

        /* Unique Item Colors */
        .item-blue .menu-icon-box { background-color: rgba(59, 130, 246, 0.15); color: #60a5fa; }
        .item-blue:hover .menu-icon-box { background-color: #2563eb; color: #ffffff; }

        .item-indigo .menu-icon-box { background-color: rgba(99, 102, 241, 0.15); color: #818cf8; }
        .item-indigo:hover .menu-icon-box { background-color: #4f46e5; color: #ffffff; }

        .item-purple .menu-icon-box { background-color: rgba(168, 85, 247, 0.15); color: #c084fc; }
        .item-purple:hover .menu-icon-box { background-color: #9333ea; color: #ffffff; }

        .item-emerald .menu-icon-box { background-color: rgba(16, 185, 129, 0.15); color: #34d399; }
        .item-emerald:hover .menu-icon-box { background-color: #059669; color: #ffffff; }

        .item-rose .menu-icon-box { background-color: rgba(244, 63, 94, 0.15); color: #fb7185; }
        .item-rose:hover .menu-icon-box { background-color: #e11d48; color: #ffffff; }

        .menu-text {
            display: flex;
            flex-direction: column;
        }

        .menu-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .menu-desc {
            font-size: 0.775rem;
            color: var(--text-muted);
        }

        /* Highlight Card inside Dropdown */
        .dropdown-card {
            background: linear-gradient(145deg, rgba(30, 41, 59, 0.7), rgba(15, 23, 42, 0.4));
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .card-badge {
            display: inline-block;
            padding: 0.25rem 0.625rem;
            font-size: 0.7rem;
            font-weight: 700;
            color: #60a5fa;
            background-color: rgba(59, 130, 246, 0.12);
            border: 1px solid rgba(59, 130, 246, 0.25);
            border-radius: 9999px;
            margin-bottom: 0.75rem;
        }

        .card-title {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .card-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }

        .card-footer {
            padding-top: 0.75rem;
            border-top: 1px solid rgba(51, 65, 85, 0.4);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.75rem;
            color: var(--text-subtle);
        }

        .card-action-btn {
            color: #60a5fa;
            font-weight: 600;
        }

        .card-action-btn:hover {
            text-decoration: underline;
        }

        /* Backdrop Dimmer */
        .backdrop {
            position: fixed;
            inset: 0;
            background-color: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(4px);
            z-index: var(--z-backdrop);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }

        .backdrop.is-active {
            opacity: 1;
            visibility: visible;
        }