:root {
    --bg: #000000;
    --text: #f5f5f7;
    --accent: #0071e3;
    --grey: #1d1d1f;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Nav */
.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(10px);
}

.logo {
    font-weight: 700;
    font-size: 1.2rem;
}

.x { color: var(--accent); }

.btn-buy-nav {
    background: var(--accent);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.8rem;
}

/* Hero */
.hero-product {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 60px;
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #fff, #888);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text p {
    font-size: 1.5rem;
    color: #86868b;
    margin-bottom: 30px;
    max-width: 400px;
}

.price-tag {
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.btn-primary {
    background: var(--accent);
    color: white;
    padding: 15px 35px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: 0.3s;
}

.btn-primary:hover {
    background: #0077ed;
    transform: scale(1.05);
}

/* CSS Watch */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    perspective: 1000px;
}

.watch-case {
    width: 250px;
    height: 300px;
    background: #333;
    border-radius: 40px;
    position: relative;
    box-shadow: 0 0 50px rgba(255,255,255,0.1);
    transform: rotateY(-15deg) rotateX(10deg);
    transition: transform 0.1s ease;
    border: 4px solid #555;
}

.screen-display {
    width: 90%;
    height: 90%;
    background: #000;
    border-radius: 32px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.time {
    font-size: 4rem;
    font-weight: 800;
}

.widgets {
    display: flex;
    gap: 15px;
    margin-top: 10px;
}

.widget {
    font-size: 0.8rem;
    color: var(--accent);
}

.band-top, .band-bottom {
    width: 160px;
    height: 100px;
    background: #1c1c1e;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: -1;
}

.band-top { top: -80px; border-radius: 20px 20px 0 0; }
.band-bottom { bottom: -80px; border-radius: 0 0 20px 20px; }

/* Features */
.features-scroll {
    padding: 100px 0;
    text-align: center;
}

.feature-block {
    margin-bottom: 150px;
    opacity: 0.8;
}

.feature-block h2 {
    font-size: 3rem;
    margin-bottom: 10px;
}

.feature-block p {
    font-size: 1.5rem;
    color: #86868b;
    margin-bottom: 40px;
}

.feat-img {
    width: 100%;
    max-width: 600px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

/* Customizer */
.customizer-section {
    padding: 100px 0;
    background: var(--grey);
}

.customizer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.watch-preview {
    width: 200px;
    height: 250px;
    background: #000;
    border: 4px solid #444;
    border-radius: 30px;
    margin: 0 auto;
    position: relative;
}

.p-band {
    width: 140px;
    height: 350px;
    background: #1c1c1e;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
    border-radius: 20px;
    transition: background 0.3s;
}

.colors {
    display: flex;
    gap: 15px;
    margin: 15px 0;
}

.color-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
}

.color-btn.active {
    border-color: var(--accent);
    transform: scale(1.1);
}

.checkout-box {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid #333;
}

.price-final {
    font-size: 2rem;
    font-weight: 700;
}

.btn-checkout {
    background: var(--accent);
    color: white;
    border: none;
    width: 100%;
    padding: 15px;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 20px;
    cursor: pointer;
    transition: 0.3s;
}

.btn-checkout:hover {
    background: #0077ed;
}

footer {
    text-align: center;
    padding: 40px;
    color: #666;
    border-top: 1px solid #333;
}

/* Animations */
[data-scroll] {
    opacity: 0;
    transform: translateY(30px);
    transition: 1s ease;
}
[data-scroll="fade-up"] { transform: translateY(30px); }
[data-scroll="zoom-in"] { transform: scale(0.9); }
[data-scroll].scrolled { opacity: 1; transform: translate(0) scale(1); }

@media (max-width: 768px) {
    .hero-container, .customizer-grid {
        flex-direction: column;
        text-align: center;
    }
    .hero-text h1 { font-size: 3rem; }
    .watch-case { margin: 40px auto; }
}