:root {
    --bg-black: #000000;
    --bg-dark-gray: #171a20; /* El color gris oscuro original de la web de Tesla */
    --text-white: #ffffff;
    --text-gray: #d0d1d2;
    --accent-blue: #3d69e1;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    scroll-behavior: smooth;
}

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

/* Header Estilo Tesla */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: transparent;
    backdrop-filter: blur(8px);
}

header .logo {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 4px;
}

nav a {
    color: var(--text-white);
    text-decoration: none;
    margin: 0 15px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--text-gray);
}

.btn-nav-tesla {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    text-decoration: none;
    padding: 6px 16px;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
    backdrop-filter: blur(4px);
    transition: background-color 0.3s;
}

.btn-nav-tesla:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Hero Section (Look Tesla Model S/3 Intro) */
.hero {
    height: 100vh;
    background: linear-gradient(to bottom, rgba(0,0,0,0.2), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1618843479313-40f8afb4b4d8?auto=format&fit=crop&q=80&w=1600') no-repeat center center/cover;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding: 140px 20px 80px 20px;
    text-align: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 600;
    letter-spacing: 6px;
    margin-bottom: 10px;
    animation: fadeIn 1s ease-out;
}

.hero-content p {
    font-size: 1.1rem;
    color: var(--text-gray);
    letter-spacing: 1px;
}

.hero-buttons {
    width: 100%;
    max-width: 300px;
}

.btn-tesla-primary {
    display: block;
    background-color: rgba(23, 26, 32, 0.8);
    color: var(--text-white);
    text-decoration: none;
    padding: 12px 0;
    border-radius: 4px;
    font-weight: 500;
    font-size: 0.95rem;
    backdrop-filter: blur(4px);
    transition: background-color 0.3s, transform 0.2s;
}

.btn-tesla-primary:hover {
    background-color: rgba(23, 26, 32, 1);
}

/* Galería de Servicios */
.services-section {
    padding: 100px 40px;
    background-color: var(--bg-black);
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 500;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.section-header p {
    color: #5c5e62;
    font-size: 1rem;
}

/* Buscador Tesla Input */
.search-container {
    position: relative;
    max-width: 450px;
    margin: 0 auto 60px auto;
}

#search-input {
    width: 100%;
    padding: 14px 20px;
    font-size: 1rem;
    border: none;
    border-radius: 20px;
    background-color: #f4f4f4;
    color: #171a20;
    outline: none;
    transition: background-color 0.3s;
}

#search-input::placeholder {
    color: #5c5e62;
}

.search-arrow {
    position: absolute;
    right: 25px;
    top: 50%;
    transform: translateY(-50%);
    color: #5c5e62;
}

/* Grid de Imágenes */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

.service-card {
    height: 450px;
    background-size: cover;
    background-position: center;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-card:hover {
    transform: scale(1.02);
}

/* Overlay sutil que se oscurece al pasar el mouse */
.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.1), rgba(0,0,0,0.7));
    display: flex;
    align-items: flex-end;
    padding: 30px;
    transition: background 0.4s;
}

.service-card:hover .card-overlay {
    background: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.85));
}

.card-info h3 {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 8px;
    letter-spacing: 1px;
}

.card-info p {
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.4;
    opacity: 0.85;
}

/* Filtrado y Estados */
.service-card.hidden {
    display: none;
}

.no-results {
    text-align: center;
    padding: 40px;
    color: #5c5e62;
    font-size: 1.1rem;
}

.hidden { display: none; }

/* Contacto & Footer */
.contact-section {
    padding: 100px 20px;
    text-align: center;
    background-color: var(--bg-dark-gray);
}

.contact-section h2 {
    font-size: 2rem;
    font-weight: 500;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.contact-section p {
    color: var(--text-gray);
    margin-bottom: 30px;
}

.btn-tesla-dark {
    display: inline-block;
    background-color: transparent;
    color: var(--text-white);
    border: 3px solid var(--text-white);
    text-decoration: none;
    padding: 10px 40px;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    transition: background-color 0.3s, color 0.3s;
}

.btn-tesla-dark:hover {
    background-color: var(--text-white);
    color: var(--bg-black);
}

footer {
    text-align: center;
    padding: 30px;
    font-size: 0.8rem;
    color: #5c5e62;
    background-color: var(--bg-black);
    letter-spacing: 1px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}