.glass-card {
            background: rgba(255, 255, 255, 0.5);
            backdrop-filter: blur(8px);
            border: 1px solid #FDE68A;
        }
        .header-transparent {
            background-color: transparent;
            border-color: transparent;
            color: white;
        }
        .header-scrolled {
            background-color: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid #FDE68A;
            color: #1f2937;
        }

        /* --- Animation Core Styles --- */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .reveal.active {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* Sequential Delays */
        .delay-100 { transition-delay: 100ms; }
        .delay-200 { transition-delay: 200ms; }
        .delay-300 { transition-delay: 300ms; }
        .delay-400 { transition-delay: 400ms; }
        .delay-500 { transition-delay: 500ms; }