#header *, #mobileNav * { margin: 0; padding: 0; box-sizing: border-box; }
:root { --on-primary: #fff; --surface: #fff; }
        /* --- Header & Navigation --- */
        header {
            background-color: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-subtle);
            padding: 20px 4%;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: all 0.3s ease;
        }

        .logo {
            font-size: 26px;
            font-weight: 900;
            color: var(--blue-dark);
            display: flex;
            align-items: center;
            gap: 5px;
            z-index: 1001;
            letter-spacing: -0.5px;
        }

        .logo-icon {
            color: var(--primary);
            font-size: 30px;
        }

        nav {
            display: flex;
            align-items: center;
            gap: 40px;
        }

        nav ul {
            list-style: none;
            display: flex;
            gap: 30px;
        }

        nav ul li a {
            font-weight: 600;
            font-size: 15px;
            color: var(--secondary);
            transition: color 0.3s ease;
        }

        nav ul li a:hover {
            color: var(--primary);
        }

        .nav-actions {
            display: flex;
            gap: 15px;
        }

        .btn {
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            border: none;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--border-subtle);
            color: var(--blue-dark);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .btn-primary {
            background: var(--primary);
            color: var(--on-primary);
            box-shadow: 0 8px 20px rgba(99, 102, 241, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(99, 102, 241, 0.35);
        }

        /* Mobile Menu */
        .mobile-menu-btn {
            display: none;
            font-size: 24px;
            color: var(--blue-dark);
            cursor: pointer;
            border: none;
            background: none;
            z-index: 1001;
        }

        .mobile-nav-overlay {
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100vh;
            background: var(--surface);
            z-index: 999;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            transform: translateY(-100%);
            transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .mobile-nav-overlay.open {
            transform: translateY(0);
        }

        .mobile-nav-overlay ul {
            list-style: none;
            text-align: center;
            margin-bottom: 40px;
        }

        .mobile-nav-overlay ul li { margin: 20px 0; }
        .mobile-nav-overlay ul li a {
            font-size: 24px;
            font-weight: 800;
            color: var(--blue-dark);
        }


#header, #mobileNav { line-height: 1.6; }
#header a, #mobileNav a { text-decoration: none; color: inherit; }
#header nav ul li a { color: var(--secondary); }
#header .btn-primary, #mobileNav .btn-primary { color: white; }