/* Variables */
:root {
    --primary-color: #1f1d1b;
    --secondary-color: #2a2825;
    --accent-color: #c8a846; /* Dorado del logotipo ALFFA */
    --text-color: #f5f3f0;
    --text-light: #a39f99;
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    --transition: all 0.4s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-color);
    line-height: 1.6;
    background-color: #24221f;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 600;
    color: #ffffff;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-padding {
    padding: 5rem 0;
}

.bg-light {
    background-color: #2a2825;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 2px;
    background-color: var(--accent-color);
    margin: 1rem auto 0;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    transition: var(--transition);
    z-index: 1000;
}

.navbar.scrolled {
    background: rgba(20, 20, 20, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.5);
    padding: 1rem 2rem;
}

.brand-logo {
    display: inline-block;
    text-align: center;
    font-family: var(--font-heading);
    color: #fff; /* Starts white on dark background */
    font-size: 2.2rem;
    line-height: 1;
    letter-spacing: 2px;
    font-weight: 400;
    transition: var(--transition);
}

.brand-logo span {
    font-size: 0.85rem;
    font-family: var(--font-body); /* Tipografía moderna y limpia */
    font-style: normal;
    text-transform: uppercase;
    letter-spacing: 6px;
    display: block;
    margin-top: 5px;
    font-weight: 300;
}

.navbar.scrolled .brand-logo {
    color: var(--accent-color); /* Turns gold when scrolled */
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
    color: #fff;
    transition: var(--transition);
}

.navbar.scrolled .nav-links a {
    color: #ffffff;
}

.nav-links a:hover {
    color: var(--accent-color);
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 2px;
    margin: 5px auto;
    background-color: #fff;
    transition: var(--transition);
}

.navbar.scrolled .bar {
    background-color: #ffffff;
}

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?ixlib=rb-4.0.3&auto=format&fit=crop&w=2000&q=80') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    background-attachment: fixed;
}

.hero-content h1 {
    font-size: 4.5rem;
    color: #fff;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    font-weight: 300;
    letter-spacing: 1px;
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--accent-color);
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: #b08a52;
    transform: translateY(-2px);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-light);
}

.about-image img {
    width: 100%;
    height: auto;
    object-fit: cover;
    box-shadow: 20px 20px 0px var(--secondary-color);
}

/* Projects Section */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.portfolio-item img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 26, 0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: var(--transition);
    color: #fff;
}

.portfolio-overlay h3 {
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    transform: translateY(20px);
    transition: all 0.4s ease 0.1s;
}

.portfolio-overlay p {
    font-size: 0.9rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent-color);
    transform: translateY(20px);
    transition: all 0.4s ease 0.2s;
}

.portfolio-item:hover img {
    transform: scale(1.05);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-item:hover .portfolio-overlay h3,
.portfolio-item:hover .portfolio-overlay p {
    transform: translateY(0);
}

/* Contact Section */
.contact-subtitle {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-light);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

.input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid #333;
    font-family: var(--font-body);
    font-size: 1rem;
    color: #fff;
    transition: var(--transition);
    background-color: #1a1a1a;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background-color: #222;
}

.contact-form button {
    width: 100%;
    margin-top: 1rem;
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: #fff;
    padding: 4rem 2rem 1.5rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto 3rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 3rem;
}

.footer-info h3, .footer-contact h4, .footer-social h4 {
    color: var(--accent-color);
    margin-bottom: 1.2rem;
}

.footer-info p, .footer-contact p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 0.8rem;
}

.footer-social a {
    display: block;
    color: var(--text-light);
    margin-bottom: 0.8rem;
    transition: var(--transition);
}

.footer-social a:hover, .footer-contact a:hover {
    color: var(--accent-color) !important;
}

.footer-bottom {
    text-align: center;
    color: var(--text-light);
    font-size: 0.8rem;
}

/* Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        right: -100%;
        top: 0;
        height: 100vh;
        width: 100%;
        background-color: var(--primary-color);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: 0.3s ease;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .navbar.scrolled .nav-links a {
        color: #fff;
    }

    .hamburger {
        display: block;
        z-index: 1001;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
    
    .navbar.scrolled .hamburger.active .bar {
        background-color: #fff;
    }

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

    .about-grid {
        grid-template-columns: 1fr;
    }

    .input-group {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }

    /* Lightbox Mobile Adjustments */
    .lightbox {
        overflow: hidden; /* Evita que una barra de scroll invisible empuje la foto a la izquierda */
    }

    .lightbox-content {
        max-width: 100%;
        width: 100%;
        height: 100vh;
        max-height: 100vh;
        justify-content: center;
    }

    #lightbox-img {
        width: 100%;
        max-height: 80vh;
        object-fit: contain;
        border: none !important; /* Fuerza a quitar el borde amarillo que estaba descuadrando */
        box-sizing: border-box;
    }

    .lightbox-prev, .lightbox-next {
        padding: 15px 20px;
        font-size: 22px;
        background: rgba(0, 0, 0, 0.7);
        border: 1px solid rgba(255,255,255,0.1);
    }

    .lightbox-prev {
        left: 0;
        border-radius: 0 8px 8px 0;
    }

    .lightbox-next {
        right: 0;
        border-radius: 8px 0 0 8px;
    }

    .lightbox-close {
        top: 15px;
        right: 20px;
        font-size: 35px;
        z-index: 2005;
    }
}

/* Lightbox Styles */
.lightbox {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(5px);
    overflow: auto;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#lightbox-img {
    max-width: 100%;
    max-height: 85vh;
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
    border: none;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 35px;
    color: #fff;
    font-size: 40px;
    font-weight: 300;
    cursor: pointer;
    transition: color 0.3s;
    z-index: 2001;
}

.lightbox-close:hover,
.lightbox-close:focus {
    color: var(--accent-color);
    text-decoration: none;
    cursor: pointer;
}

.lightbox-prev,
.lightbox-next {
    cursor: pointer;
    position: absolute;
    top: 50%;
    width: auto;
    padding: 16px;
    margin-top: -50px;
    color: white;
    font-weight: 300;
    font-size: 30px;
    transition: 0.3s ease;
    border-radius: 0 3px 3px 0;
    user-select: none;
    background: rgba(0, 0, 0, 0.3);
    border: none;
    z-index: 2001;
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
    border-radius: 3px 0 0 3px;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background-color: rgba(0, 0, 0, 0.8);
    color: var(--accent-color);
}

.lightbox-counter {
    color: #ccc;
    font-size: 14px;
    padding: 10px 0;
    letter-spacing: 2px;
}

/* Photo Enhancements for older pictures */
.archival-photo,
#lightbox-img {
    filter: contrast(1.1) saturate(1.1) brightness(1.05);
}