:root {
    --bg: #050505;
    --surface: #111111;
    --text-main: #f5f5f5;
    --text-muted: #888888;
    --gold: #d4af37;
    --gold-hover: #e8c34f;
    --border: #222222;
    --font-heading: 'Cinzel', serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    background-color: var(--bg);
    color: var(--text-main);
    font-family: var(--font-body);
    font-weight: 300;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    background: rgba(5, 5, 5, 0.8);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid var(--border);
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--gold);
}

.nav-links a, .nav-actions a {
    color: var(--text-main);
    text-decoration: none;
    margin: 0 1.5rem;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: color 0.3s;
}
.nav-links a:hover, .nav-actions a:hover {
    color: var(--gold);
}

.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(circle at center, #1a1a1a 0%, var(--bg) 100%);
    padding: 0 20px;
}

.hero-content h1 {
    font-family: var(--font-heading);
    font-size: 4.5rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
    background: linear-gradient(to right, #fff, #888);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem auto;
    line-height: 1.6;
}

.btn-primary {
    display: inline-block;
    background: var(--gold);
    color: var(--bg);
    padding: 1rem 3rem;
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    border: 1px solid var(--gold);
}

.btn-primary:hover {
    background: transparent;
    color: var(--gold);
}

/* Configurator */
.configurator {
    display: flex;
    min-height: 100vh;
    padding-top: 80px; /* navbar height */
}

.config-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #020202;
    position: relative;
    overflow: hidden;
    perspective: 1200px;
}

.config-visual img {
    max-width: 80%;
    max-height: 80vh;
    object-fit: contain;
    transition: opacity 0.5s ease, transform 0.1s ease-out;
    filter: drop-shadow(0px 30px 50px rgba(0,0,0,0.9));
    transform-origin: center center;
}

.config-panel {
    flex: 0 0 450px;
    background: var(--surface);
    padding: 4rem 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-left: 1px solid var(--border);
}

.model-name {
    font-family: var(--font-heading);
    font-size: 2.3rem;
    font-weight: 400;
    margin-bottom: 0.5rem;
    color: var(--gold);
}

.model-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.price {
    font-family: var(--font-body);
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 3rem;
    color: var(--text-main);
}

.options h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.material-selector {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 3rem;
}

.mat-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 1.2rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    letter-spacing: 0.1em;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.mat-btn.active {
    border-color: var(--gold);
    color: var(--text-main);
}

.mat-btn:hover {
    border-color: var(--text-main);
    color: var(--text-main);
}
.mat-btn.active:hover {
    border-color: var(--gold);
}

.color-dot {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: inline-block;
}

.btn-checkout {
    background: var(--text-main);
    color: var(--bg);
    border: none;
    padding: 1.2rem;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.3s;
    margin-bottom: 1.5rem;
}

.btn-checkout:hover {
    background: var(--gold);
}

.guarantee {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
}

@media (max-width: 900px) {
    .configurator { flex-direction: column; }
    .config-panel { flex: auto; padding: 3rem 2rem; border-left: none; border-top: 1px solid var(--border); }
    .hero-content h1 { font-size: 3rem; }
    .nav-links { display: none; }
}