:root {
    --bg: #111112;
    --bg-section: #161618;
    --text: #e8e8e8;
    --muted: #888;
    --border: rgba(255, 255, 255, 0.08);
    --accent: #e8e8e8;
    --font: 'Inter', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    line-height: 1.7;
    overflow-x: hidden;
}

/* NAV */

nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1.2rem 2.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background 0.3s, border-color 0.3s;
    border-bottom: 1px solid transparent;
}

nav.scrolled {
    background: rgba(17, 17, 18, 0.9);
    border-color: var(--border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-inner {
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.3px;
    color: var(--text);
}

.nav-link {
    font-size: 0.85rem;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s;
}

.nav-link:hover {
    color: var(--text);
}

/* HERO */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2.5rem 4rem;
}

.hero-inner {
    max-width: 620px;
    text-align: center;
}

.eyebrow {
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1.4rem;
    animation: fade-up 0.6s ease both 0s;
}

h1 {
    font-size: clamp(3rem, 10vw, 5.5rem);
    font-weight: 700;
    letter-spacing: -2px;
    line-height: 1.05;
    color: var(--text);
    margin-bottom: 1.5rem;
    animation: fade-up 0.6s ease both 0.1s;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--muted);
    font-weight: 400;
    max-width: 480px;
    margin: 0 auto 2.5rem;
    animation: fade-up 0.6s ease both 0.2s;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: var(--text);
    color: var(--bg);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 6px;
    transition: opacity 0.2s, transform 0.2s;
    animation: fade-up 0.6s ease both 0.3s;
}

.btn:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

/* SECTIONS */

.section {
    padding: 6rem 2.5rem;
    border-top: 1px solid var(--border);
}

.section:nth-child(even) {
    background: var(--bg-section);
}

.section-inner {
    max-width: 600px;
    margin: 0 auto;
}

h2 {
    font-size: clamp(1.4rem, 3vw, 1.9rem);
    font-weight: 600;
    letter-spacing: -0.5px;
    margin-bottom: 1.2rem;
    color: var(--text);
}

.section p {
    color: var(--muted);
    font-size: 1rem;
    margin-bottom: 0.8rem;
}

/* SCROLL REVEAL */

.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: none;
}

/* FOOTER */

footer {
    padding: 3rem 2.5rem;
    border-top: 1px solid var(--border);
}

.footer-inner {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-inner p {
    font-size: 0.85rem;
    color: var(--muted);
}

.footer-link {
    font-size: 0.85rem;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-link:hover {
    color: var(--text);
}

/* KEYFRAMES */

@keyframes fade-up {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: none; }
}

/* RESPONSIVE */

@media (max-width: 500px) {
    nav {
        padding: 1.2rem 1.5rem;
    }
    .hero {
        padding: 6rem 1.5rem 4rem;
    }
    .section {
        padding: 5rem 1.5rem;
    }
    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}