:root {
    /* Colors */
    --bg-color: #050505;
    --card-bg: rgba(20, 20, 20, 0.7);
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-primary: #D4AF37;
    --accent-secondary: #FFD700;
    --gradient: linear-gradient(135deg, #D4AF37 0%, #FFD700 100%);
    --gradient-glow: linear-gradient(135deg, rgba(212, 175, 55, 0.3) 0%, rgba(255, 215, 0, 0.3) 100%);

    /* Spacing */
    --container-max: 1200px;
    --nav-height: 80px;

    /* Transitions */
    --transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
.logo {
    font-family: 'Outfit', sans-serif;
    font-weight: 800;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Header & Nav --- */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

header.scrolled {
    background: rgba(5, 5, 5, 0.85);
    backdrop-filter: blur(15px);
    height: 70px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo a {
    text-decoration: none;
    display: flex;
    align-items: center;
}

.nav-logo {
    height: 50px;
    /* Un poco más grande para el logo con dragón */
    width: auto;
    transition: var(--transition);
}

.logo a:hover .nav-logo {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-links li {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 15px 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    list-style: none;
    z-index: 1000;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    padding: 10px 25px;
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: none;
}

.dropdown-menu li a:hover {
    color: var(--accent-primary);
    background: rgba(212, 175, 55, 0.05);
}

.dropdown-trigger i {
    font-size: 0.7rem;
    margin-left: 5px;
    transition: var(--transition);
}

.dropdown:hover .dropdown-trigger i {
    transform: rotate(180deg);
}

.btn-subscribe {
    background: #ff0000;
    color: white;
    padding: 10px 20px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(255, 0, 0, 0.3);
}

.btn-subscribe:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 0, 0, 0.5);
    background: #e60000;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* --- Hero Slider --- */
.hero-slider {
    height: 100vh;
    position: relative;
    overflow: hidden;
}

.slider-container {
    height: 100%;
    width: 100%;
    position: relative;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 1s ease-in-out, visibility 1s;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.slide.active {
    opacity: 1;
    visibility: visible;
    z-index: 1;
}

.slider-controls {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    z-index: 10;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background: var(--accent-primary);
    transform: scale(1.3);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.4) saturate(0.8);
}

.hero-background .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, var(--bg-color) 90%);
}

.hero-content {
    max-width: 900px;
    padding-top: var(--nav-height);
}

.hero h1 {
    font-size: 5rem;
    line-height: 1.1;
    margin-bottom: 20px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s forwards 0.2s;
}

.hero-subtext {
    font-size: clamp(1rem, 2vw, 1.4rem);
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s forwards 0.4s;
}

.hero-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s forwards 0.6s;
}

.btn {
    padding: 16px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient);
    color: #050505;
    /* Black text on gold looks better for contrast */
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(212, 175, 55, 0.5);
    background: #FFD700;
}

.btn-outline {
    background: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.mouse {
    width: 20px;
    height: 35px;
    border: 2px solid var(--text-secondary);
    border-radius: 20px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: scroll 2s infinite;
}

/* --- Section Styling --- */
section {
    padding: 120px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 70px;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 15px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* --- Lab Section --- */
.lab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.lab-card {
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.lab-card:hover {
    transform: translateY(-10px);
    border-color: rgba(0, 210, 255, 0.3);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.card-img {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.lab-card:hover .card-img img {
    transform: scale(1.1);
}

.tag {
    position: absolute;
    top: 15px;
    right: 15px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    padding: 5px 12px;
    font-size: 0.75rem;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--accent-primary);
}

.card-content {
    padding: 25px;
}

.card-content h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
}

.card-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.read-more {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.read-more:hover {
    gap: 12px;
}

/* --- About Section --- */
.about-section {
    background: linear-gradient(to bottom, transparent, rgba(58, 123, 213, 0.05), transparent);
}

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

.about-image {
    position: relative;
}

.about-image img {
    border-radius: 20px;
    width: 100%;
    height: 500px;
    object-fit: cover;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
}

.frame-decoration {
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent-primary);
    border-radius: 20px;
    z-index: -1;
    opacity: 0.3;
}

.about-quote {
    font-size: 1.5rem;
    color: var(--accent-primary);
    font-style: italic;
    margin-bottom: 25px;
    font-family: 'Outfit', sans-serif;
}

.about-content p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.social-links {
    margin-top: 30px;
    display: flex;
    gap: 20px;
}

.social-links a {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--gradient);
    border-color: transparent;
    transform: translateY(-5px);
}

/* --- Contact Section --- */
.contact-card {
    background: var(--card-bg);
    border-radius: 30px;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    overflow: hidden;
}

.contact-info {
    padding: 60px;
    background: var(--gradient-glow);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-info h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.contact-list {
    list-style: none;
    margin-top: 40px;
}

.contact-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.contact-list i {
    color: var(--accent-primary);
    font-size: 1.2rem;
}

.contact-form {
    padding: 60px;
}

.form-group {
    margin-bottom: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: white;
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: rgba(255, 255, 255, 0.05);
}

/* --- Footer --- */
footer {
    padding: 60px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    text-align: center;
}

.footer-logo {
    font-size: 1.2rem;
    letter-spacing: 1px;
    font-weight: 700;
}

.footer-logo-img {
    height: 40px;
    width: auto;
    margin-bottom: 20px;
}

footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-bottom-links {
    display: flex;
    gap: 20px;
}

.footer-bottom-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
}

/* --- Animations --- */
@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scroll {
    0% {
        transform: translate(-50%, 0);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, 15px);
        opacity: 0;
    }
}

/* --- Responsive --- */
@media (max-width: 992px) {
    .about-container {
        grid-template-columns: 1fr;
    }

    .contact-card {
        grid-template-columns: 1fr;
    }

    .about-image img {
        height: 400px;
    }
}

/* --- Newsletter Section --- */
.newsletter-section {
    padding: 80px 0;
}

.newsletter-card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 30px;
    padding: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.newsletter-content h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.newsletter-content p {
    color: var(--text-secondary);
    max-width: 500px;
}

.newsletter-form {
    display: flex;
    gap: 15px;
    flex: 1;
    max-width: 500px;
}

.newsletter-form input {
    flex: 1;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: white;
    font-family: inherit;
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

@media (max-width: 992px) {
    .newsletter-card {
        flex-direction: column;
        text-align: center;
        padding: 40px;
    }

    .newsletter-form {
        width: 100%;
        max-width: 100%;
    }
}

/* --- Video Modal --- */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 3000;
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 1000px;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    /* 16:9 ratio */
    height: 0;
    overflow: hidden;
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.close-modal {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition);
}

.close-modal:hover {
    color: var(--accent-primary);
}

/* --- Mobile Menu Overlay --- */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 5, 5, 0.95);
    backdrop-filter: blur(20px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-container {
    text-align: center;
    position: relative;
    width: 100%;
}

.mobile-nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.mobile-nav-links a {
    text-decoration: none;
    color: white;
    font-size: 2rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    transition: var(--transition);
}

.mobile-nav-links a:hover {
    color: var(--accent-primary);
    transform: scale(1.1);
}

.close-menu {
    position: absolute;
    top: -100px;
    right: 40px;
    font-size: 2rem;
    cursor: pointer;
    color: white;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero h1 {
        font-size: 3rem;
    }

    .contact-info,
    .contact-form {
        padding: 40px 30px;
    }
}
/* Additional Mobile Responsiveness */
@media (max-width: 992px) {
    .about-container { grid-template-columns: 1fr; gap: 40px; }
    .contact-card { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    header .container { padding: 0 20px; }
    .hero h1 { font-size: 2.8rem; }
    .hero-subtext { font-size: 1rem; }
    .hero-btns { flex-direction: column; align-items: center; gap: 15px; }
    .btn { width: 100%; max-width: 300px; text-align: center; }
    .about-image img { height: 350px; }
    .contact-info, .contact-form { padding: 40px 20px; }
    .footer-content { grid-template-columns: 1fr; text-align: center; gap: 40px; }
    .footer-links, .social-links { justify-content: center; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 2.2rem; }
    .section-title { font-size: 1.8rem; }
}