/* Global Reset & Typography */
:root {
    --bg-color: #000000;
    --text-color: #f5f5f7;
    --accent-color: #2997ff; /* Apple Blue */
    --secondary-text: #86868b;
    --section-padding: 120px 20px;
    --max-width: 980px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    overflow-x: hidden;
}

a {
    color: var(--text-color);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

a:hover {
    opacity: 0.8;
}

/* Header / Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 15px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 600;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: 30px;
    font-size: 0.9rem;
}

.nav-links a {
    color: var(--text-color);
    font-size: 12px;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
    opacity: 0;
    animation: fadeIn 1.5s ease forwards;
}

.hero h1 {
    font-size: 5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    background: linear-gradient(180deg, #fff 0%, #86868b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.5rem;
    color: var(--secondary-text);
    max-width: 600px;
    margin-bottom: 40px;
    font-weight: 400;
}

/* Scroll Animations */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s ease-out, transform 1s ease-out;
    will-change: opacity, visibility;
}

.fade-in-section.is-visible {
    opacity: 1;
    transform: none;
}

/* Content Sections */
.content-section {
    padding: var(--section-padding);
    max-width: var(--max-width);
    margin: 0 auto;
}

.large-text {
    font-size: 3rem;
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 40px;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.text-block p {
    font-size: 1.2rem;
    color: var(--secondary-text);
    margin-bottom: 20px;
}

/* Footer */
footer {
    background: #111;
    padding: 60px 20px;
    font-size: 0.8rem;
    color: var(--secondary-text);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer-branding {
    padding-bottom: 20px;
    border-bottom: 1px solid #333;
    margin-bottom: 20px;
    color: #f5f5f7;
    font-weight: 500;
}

/* Keyframes */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 3rem;
    }
    .grid-2 {
        grid-template-columns: 1fr;
    }
}