* {
    scroll-behavior: smooth;
}

body {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Animated background particles */
.bg-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.particle {
    position: absolute;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.6) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 8s ease-in-out infinite;
}

/* Glass effect base - Liquid Glass Philosophy */
.glass {
    background: rgba(255, 255, 255, 0.05);
    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, 0.37);
}

.glass-strong {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(30px) saturate(200%);
    -webkit-backdrop-filter: blur(30px) saturate(200%);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Hover effects with physics-based animations */
.glass-hover {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-hover:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
    box-shadow: 0 12px 48px 0 rgba(59, 130, 246, 0.3), 
                inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

/* Button glass effect */
.btn-glass {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.8) 0%, rgba(37, 99, 235, 0.9) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(147, 197, 253, 0.3);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-glass:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 1) 0%, rgba(37, 99, 235, 1) 100%);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.6), 
                0 0 60px rgba(59, 130, 246, 0.4),
                inset 0 1px 0 rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
}

.btn-glass:active {
    transform: translateY(0);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
}

/* Navigation glass */
.nav-glass {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Feature card styling with lens effect */
.feature-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: 0 20px 60px rgba(59, 130, 246, 0.2),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transform: translateY(-8px);
}

/* Icon glow effect - light interaction */
.icon-glow {
    filter: drop-shadow(0 0 10px rgba(59, 130, 246, 0.6));
    transition: filter 0.3s ease;
}

.feature-card:hover .icon-glow {
    filter: drop-shadow(0 0 20px rgba(59, 130, 246, 0.8));
}

/* Input glass styling */
.input-glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: white;
}

.input-glass::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.input-glass:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(59, 130, 246, 0.5);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
    outline: none;
}

/* Gradient text */
.gradient-text {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 5s ease infinite;
    background-size: 200% 200%;
}

/* Animations */
@keyframes float {
    0%, 100% { 
        transform: translateY(0px);
    }
    50% { 
        transform: translateY(-20px);
    }
}

@keyframes gradient-shift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

@keyframes countUp {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.stat-item {
    animation: countUp 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Universal softness - rounded corners (2xl and full only) */
button, 
input, 
textarea {
    border-radius: 1rem; /* rounded-2xl */
}

/* Depth and layering */
section {
    position: relative;
    z-index: 1;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .glass,
    .glass-strong {
        backdrop-filter: blur(15px) saturate(150%);
        -webkit-backdrop-filter: blur(15px) saturate(150%);
    }
}

/* Loading animation for async content */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading-shimmer {
    animation: shimmer 2s infinite linear;
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0.05) 0%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(255, 255, 255, 0.05) 100%
    );
    background-size: 1000px 100%;
}