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

:root {
    --color-primary: #1a1a1a;
    --color-secondary: #8b7355;
    --color-accent: #95c11f;
    --color-light: #f5f3f0;
    --color-white: #ffffff;
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-light);
    color: var(--color-primary);
    overflow-x: hidden;
}

/* ===== NAVIGATION ===== */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    transition: all 0.4s ease;
}

nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 4rem;
    box-shadow: 0 2px 20px rgba(0,0,0,0.05);
}

.logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--color-white);
    transition: color 0.4s ease;
}

nav.scrolled .logo {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-white);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    transition: color 0.3s ease;
    position: relative;
}

nav.scrolled .nav-links a {
    color: var(--color-primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-secondary);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* ===== HERO SECTION ===== */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    display: block;
    object-fit: cover;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6); /* fondo negro semitransparente para mejorar contraste */
    pointer-events: none;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-white);
    max-width: 900px;
    padding: 0 2rem;
    text-shadow: 0 6px 20px rgba(0,0,0,0.65);
}

.hero-subtitle {
    font-size: 0.9rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.3s forwards;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 400;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.6s forwards;
}

.hero-title span {
    font-style: italic;
    color: var(--color-accent);
}

.hero-description {
    font-size: 1.1rem;
    font-weight: 300;
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto 2.5rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.9s forwards;
    color: rgba(255,255,255,0.8);
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    border: 1px solid rgba(255,255,255,0.3);
    color: var(--color-white);
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    transition: all 0.4s ease;
    opacity: 0;
    animation: fadeInUp 1s ease 1.2s forwards;
}

.hero-cta:hover {
    background: var(--color-white);
    color: var(--color-primary);
}

.hero-cta svg {
    transition: transform 0.3s ease;
}

.hero-cta:hover svg {
    transform: translateY(3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255,255,255,0.6);
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    animation: bounce 2s infinite;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.6), transparent);
}

/* ===== PROJECTS SECTION ===== */
.projects-section {
    padding: 8rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 6rem;
    padding: 0 2rem;
}

.section-header h2 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 400;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--color-secondary);
    font-size: 0.9rem;
    letter-spacing: 3px;
    text-transform: uppercase;
}

/* ===== PROJECT CARD ===== */
.project {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 4rem 0;
    opacity: 0;
    transform: translateY(60px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.project.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 4rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.project:nth-child(even) .project-container {
    direction: rtl;
}

.project:nth-child(even) .project-info {
    direction: ltr;
}

/* ===== GALLERY ===== */
.project-gallery {
    position: relative;
    height: 600px;
    overflow: hidden;
    border-radius: 4px;
}

.gallery-main {
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

.gallery-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.project-gallery:hover .gallery-main img {
    transform: scale(1.05);
}

/* Ensure videos in the gallery behave like images (cover and scale) */
.gallery-main video,
.gallery-main .project-media {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.project-gallery:hover .gallery-main video,
.project-gallery:hover .gallery-main .project-media {
    transform: scale(1.05);
}

.gallery-thumbs {
    position: absolute;
    bottom: 1.5rem;
    left: 1.5rem;
    right: 1.5rem;
    display: flex;
    gap: 0.75rem;
    z-index: 10;
}

.gallery-thumb {
    width: 80px;
    height: 60px;
    border-radius: 3px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    opacity: 0.7;
}

.gallery-thumb.active {
    border-color: var(--color-white);
    opacity: 1;
}

.gallery-thumb:hover {
    opacity: 1;
}

.gallery-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: rgba(255,255,255,0.9);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all 0.3s ease;
    opacity: 0;
}

.project-gallery:hover .gallery-nav {
    opacity: 1;
}

.gallery-nav:hover {
    background: var(--color-white);
    transform: translateY(-50%) scale(1.1);
}

.gallery-nav.prev { left: 1rem; }
.gallery-nav.next { right: 1rem; }

.gallery-counter {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: rgba(0,0,0,0.6);
    color: var(--color-white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    z-index: 10;
}

/* ===== PROJECT INFO ===== */
.project-info {
    padding: 2rem 0;
}

.project-number {
    font-family: var(--font-serif);
    font-size: 5rem;
    font-weight: 400;
    color: rgba(139, 115, 85, 0.15);
    line-height: 1;
    margin-bottom: 1rem;
}

.project-category {
    font-size: 0.8rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-secondary);
    margin-bottom: 1rem;
}

.project-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.project-location {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--color-secondary);
    margin-bottom: 1.5rem;
}

.project-description {
    font-size: 1rem;
    line-height: 1.8;
    color: #555;
    margin-bottom: 2rem;
}

.project-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(0,0,0,0.1);
}

.detail-item h4 {
    font-size: 0.75rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--color-secondary);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.detail-item p {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-primary);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-primary);
    transition: all 0.3s ease;
}

.project-link:hover {
    gap: 1.25rem;
    color: var(--color-secondary);
    border-color: var(--color-secondary);
}

/* ===== FOOTER ===== */
footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 4rem;
    text-align: center;
}

.footer-content {
    max-width: 600px;
    margin: 0 auto;
}

.footer-logo {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.footer-text {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    line-height: 1.8;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .project-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 2rem;
    }

    .project:nth-child(even) .project-container {
        direction: ltr;
    }

    .project-gallery {
        height: 400px;
    }

    nav {
        padding: 1rem 2rem;
    }

    .nav-links {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .project-details {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .project-number {
        font-size: 3rem;
    }

    .gallery-thumbs {
        display: none;
    }
}

/* ===== PRE-FOOTER BANNER ===== */
.pre-footer-banner {
    background: var(--color-primary);
    padding: 3rem 0;
    display: flex;
    justify-content: center;
    align-items: center;
}
.banner-inner {
    width: 100%;
    max-width: 1400px;
    padding: 0 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
}
.banner-text {
    text-align: center;
    color: var(--color-white);
}
.banner-text h3 {
    font-family: var(--font-serif);
    font-size: clamp(1.4rem, 2.6vw, 2rem);
    margin: 0;
    font-weight: 500;
}
.banner-text p {
    margin: 0.35rem 0 0;
    color: rgba(255,255,255,0.9);
    font-size: 1rem;
}
.banner-images {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}
.banner-images img {
    flex: 1 1 auto;
    width: 30%;
    max-height: 80px;
    min-width: 80px;
    object-fit: contain;
    display: block;
    filter: none;
}

/* ===== STEPS CAROUSEL ===== */
.steps-carousel {
    padding: 3rem 0 2rem;
    background: var(--color-light);
}
.steps-carousel .section-header {
    text-align: center;
    margin-bottom: 2rem;
}
.steps-carousel .section-header h2 {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    margin-bottom: 0.5rem;
    font-weight: 500;
}
.steps-carousel .section-header p {
    color: var(--color-secondary);
    font-size: 1.1rem;
    margin: 0;
}
.carousel-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1rem;
}
.carousel-viewport {
    overflow: hidden;
    flex: 1 1 auto;
}
.carousel-track {
    display: flex;
    transition: transform 0.45s cubic-bezier(0.22, 0.9, 0.18, 1);
}
.carousel-item {
    min-width: 100%;
    padding: 2rem;
    background: #fff;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 6px 20px rgba(0,0,0,0.05);
}
.carousel-item h4 {
    margin-top: 0.5rem;
    margin-bottom: 0.5rem;
}
.step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary);
    color: var(--color-white);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}
.carousel-control {
    background: transparent;
    border: none;
    font-size: 1.8rem;
    color: var(--color-primary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
}
.carousel-dots {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1rem;
}
.carousel-dots button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ddd;
    border: none;
    cursor: pointer;
}
.carousel-dots button.active {
    background: var(--color-primary);
}

@media (max-width: 768px) {
    .pre-footer-banner { padding: 2rem 0; }
    .banner-inner { gap: 1rem; padding: 0 1rem; }
    .banner-images { gap: 0.75rem; max-width: 100%; flex-wrap: wrap; }
    .banner-images img { 
        width: 28%; 
        min-width: 50px; 
        max-height: 50px; 
        flex: 0 1 auto;
    }
    .carousel-item { padding: 1.25rem; }
    .carousel-control { font-size: 1.4rem; }
}

/* ===== VIDEO GALLERY ===== */
.video-gallery {
    padding: 4rem 0;
    background: #fff;
}
.video-header {
    text-align: center;
    margin-bottom: 1.5rem;
}
.video-header h2 {
    font-family: var(--font-serif);
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    margin-bottom: 0.5rem;
}
.video-header p {
    color: var(--color-secondary);
    margin: 0;
}
.video-carousel-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1rem;
}
.video-viewport {
    overflow: hidden;
    flex: 1 1 auto;
}
.video-track {
    display: flex;
    transition: transform 0.45s cubic-bezier(0.22, 0.9, 0.18, 1);
}
.video-item {
    min-width: 100%;
    padding: 0.5rem;
    box-sizing: border-box;
}
.video-item iframe {
    width: 100%;
    height: 420px;
    border: none;
    border-radius: 8px;
    display: block;
    background: #000;
}
.video-control {
    background: transparent;
    border: none;
    font-size: 1.9rem;
    color: var(--color-primary);
    cursor: pointer;
    padding: 0.25rem 0.5rem;
}
.video-dots {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 1rem;
}
.video-dots button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ddd;
    border: none;
    cursor: pointer;
}
.video-dots button.active { background: var(--color-primary); }

@media (max-width: 1024px) {
    .video-item iframe { height: 340px; }
}
@media (max-width: 600px) {
    .video-item iframe { height: 220px; }
}