/* op9.rs - Monochrome Crystal Study */
/* Colors: #FAFAFA, #000000, #D0D0D0, #E0E0E0, #1A1A1A, #6A6A6A */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', sans-serif;
    color: #1A1A1A;
    background: #FAFAFA;
    overflow-x: hidden;
}

.noise-bg {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='256' height='256' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none; z-index: -1;
}

.parallax-layer { position: fixed; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }

.crystal {
    position: absolute;
}

.crystal-1 { width: 200px; height: 300px; top: 5%; right: 10%; }
.crystal-2 { width: 160px; height: 240px; top: 40%; left: 5%; }
.crystal-3 { width: 120px; height: 200px; bottom: 10%; right: 25%; }

.content-layer {
    position: relative; z-index: 1;
    max-width: 640px; margin: 0 auto; padding: 0 24px;
}

.hero {
    min-height: 80vh; display: flex; align-items: center; justify-content: center;
}

.hero-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2.5rem, 6vw, 5.5rem);
    font-weight: 700; color: #1A1A1A;
    letter-spacing: -0.02em;
}

.content-block {
    padding: 80px 0;
    border-top: 1px solid #E0E0E0;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.68, -0.15, 0.265, 1.25),
                transform 0.7s cubic-bezier(0.68, -0.15, 0.265, 1.25);
}

.content-block.visible {
    opacity: 1;
    transform: translateY(0);
}

.block-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px; color: #D0D0D0;
    display: block; margin-bottom: 16px;
}

.block-heading {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 700; color: #1A1A1A;
    margin-bottom: 16px; letter-spacing: -0.01em;
}

.block-text {
    font-family: 'Inter', sans-serif;
    font-size: clamp(0.95rem, 1.1vw, 1.15rem);
    line-height: 1.9; color: #6A6A6A;
}

@media (max-width: 768px) {
    .content-block { padding: 50px 0; }
    .crystal { opacity: 0.5; }
}