:root {
    --scroll-width: 0%;
}

html {
    scroll-behavior: smooth;
}

body {
    background: #000;
    color: #fff;
    font-family: 'Inter', sans-serif;
    font-weight: 300;
    line-height: 1.7;
    overflow-x: hidden;
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--scroll-width);
    height: 1px;
    background: #fff;
    z-index: 100;
    transition: width 0.1s linear;
}

nav {
    transition: all 0.3s ease;
}

h1, h2, h3 {
    font-weight: 300;
    letter-spacing: -0.02em;
    margin-bottom: 2rem;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 5rem);
    line-height: 1.1;
}

h2 {
    font-size: clamp(2rem, 6vw, 3.5rem);
}

h3 {
    font-size: 1.5rem;
}

p {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

a {
    transition: all 0.3s ease;
}

section {
    padding: 8rem 0;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Interactive Elements */
.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.card {
    transition: transform 0.3s ease;
}

.card:hover {
    transform: scale(1.02);
}

.btn {
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: #fff;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.btn:hover::after {
    transform: scaleX(1);
}

/* Timeline */
.timeline-item {
    opacity: 0.5;
    transition: all 0.3s ease;
}

.timeline-item.active {
    opacity: 1;
}

/* Horizontal Scroll */
.scroll-container {
    scroll-snap-type: x mandatory;
}

.scroll-item {
    scroll-snap-align: start;
}

/* Before/After Slider */
.slider-container {
    position: relative;
}

.slider-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: #fff;
    cursor: ew-resize;
    z-index: 2;
}

/* Responsive */
@media (max-width: 768px) {
    section {
        padding: 4rem 0;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    p {
        font-size: 1rem;
    }
}