.fluid-bg {
    /* Static gradient background */
    background: linear-gradient(135deg, 
        #191981, 
        #060673, 
        #f9f9fb
    );
    position: relative;
    min-height: 100vh;
}

.fluid-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

/* Apple Glassmorphism - Light Glass */
.glass {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15),
                inset 0 1px 0 0 rgba(255, 255, 255, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.35);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.2),
                inset 0 1px 0 0 rgba(255, 255, 255, 0.4);
}

/* Apple Glassmorphism - Dark Glass */
.glass-dark {
    background: rgba(0, 0, 0, 0.25);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2),
                inset 0 1px 0 0 rgba(255, 255, 255, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-dark:hover {
    background: rgba(0, 0, 0, 0.35);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.3),
                inset 0 1px 0 0 rgba(255, 255, 255, 0.15);
}

/* Apple Glassmorphism - Navbar Glass */
.glass-navbar {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(30px) saturate(180%);
    -webkit-backdrop-filter: blur(30px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 24px 0 rgba(31, 38, 135, 0.1),
                inset 0 1px 0 0 rgba(255, 255, 255, 0.2);
}

/* Scroll Animations */
.fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    opacity: 0;
    transform: translateY(20px);
}

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

.delay-100 {
    animation-delay: 0.1s;
}

.delay-200 {
    animation-delay: 0.2s;
}

.delay-300 {
    animation-delay: 0.3s;
}

.delay-400 {
    animation-delay: 0.4s;
}

/* Custom Scrollbar - Black Style */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.6);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: padding-box;
    transition: background 0.2s ease;
    cursor: pointer;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.8);
    background-clip: padding-box;
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(0, 0, 0, 0.6) rgba(0, 0, 0, 0.1);
}

/* Apple-style text shadows for better readability */
.text-shadow-soft {
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.text-shadow-medium {
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.text-shadow-strong {
    text-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}