/* Base Styles & Utilities */
:root {
    --brand-500: #14b8a6;
    --dark-bg: #0f172a;
    --dark-card: rgba(30, 41, 59, 0.7);
    --dark-border: rgba(255, 255, 255, 0.1);
}

body {
    scroll-behavior: smooth;
    background-color: var(--dark-bg);
}

/* Glassmorphism Utilities */
.glass-nav {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.glass-card {
    background: var(--dark-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, #2dd4bf 0%, #0d9488 100%);
    color: white;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0d9488 0%, #0f766e 100%);
    opacity: 0;
    z-index: -1;
    transition: opacity 0.3s ease;
}

.btn-primary:hover::before {
    opacity: 1;
}

/* Animations */
.animation-delay-2000 {
    animation-delay: 2s;
}

.animation-delay-4000 {
    animation-delay: 4s;
}

/* Intersection Observer Animations */
.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* CSS Perspective for 3D Transforms */
.perspective-1000 {
    perspective: 1000px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: #334155;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #475569;
}