:root{
    --primary:#f97316;
    --dark:#111;
}

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial, Helvetica, sans-serif;
}

body{
    scroll-behavior:smooth;
    padding-top:80px; /* evita que el header fixed tape contenido */
}

#nosotros h2{
    border-left:5px solid var(--primary);
    padding-left:15px;
    margin-bottom:30px;
    line-height: 1.7;
}


.container{
    width:94%;
    max-width:1200px;
    margin:auto;
}

.section{
    padding:70px 0;
}

.section.light{
    background:#f7f7f7;
}

.section.dark{
    background:#111;
    color:#fff;
}

.center{
    text-align:center;
}

/* ================= HEADER ================= */

.header{
    position:fixed;
    width:100%;
    top:0;
    left:0;
    background:#fff;
    box-shadow:0 2px 10px rgba(0,0,0,.05);
    z-index:1000;
    padding: 10px 0;
}

.nav{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:20px 0;
}

.logo{
    font-weight:800;
    font-size:1.2rem;
}

.menu{
    list-style:none;
    display:flex;
    gap:12px;
}

.menu a{
    text-decoration:none;
    color:#111;
    font-weight:500;
    position:relative;
    transition:color .3s ease;
    font-size: .95rem; 
}

.menu a:hover{
    color:var(--primary);
}

.menu a::after{
    content:"";
    position:absolute;
    left:0;
    bottom:-5px;
    width:0;
    height:2px;
    background:var(--primary);
    transition:width .3s ease; /* corregido */
}

.menu a:hover::after{
    width:100%;
}

/* ================= HERO ================= */

.hero{
    height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    text-align:center;
    background:
    linear-gradient(rgba(0,0,0,.6),rgba(0,0,0,.6)),
    url("img/fondo.jpg");
    background-size:cover;
    background-position:center;
    color:#fff;
}

.hero-title{
    font-size:2.2rem;
    letter-spacing:2px;
    line-height: 1.2;
}

.hero-subtitle{
    font-size: 1rem;
    margin:15px 0 30px;
}

.btn{
    background:var(--primary);
    color:#fff;
    padding:14px 32px;
    border-radius:30px;
    text-decoration:none;
}

/* ================= SPLIT ================= */

.split{
    display:flex;
    gap:60px;
    align-items:center;
}

.split div:first-child{ flex:1; }
.split div:last-child{ flex:1.3; }

.split img{
    width:100%;
    height:260px;
    object-fit:cover;
    border-radius:20px;
}

/* ================= CARDS ================= */

.cards{
    display:flex;
    gap:30px;
    margin-top:50px;
}

.card{
    flex:1;
    padding:50px 30px;
    border-radius:20px;
    background:#fff;
    box-shadow:0 10px 25px rgba(0,0,0,.05);
    cursor:pointer;
    transition:.4s;
}

.card-hidden{
    opacity:0;
    max-height:0;
    overflow:hidden;
    transition:.4s;
}

.card:hover{
    background:var(--primary);
    color:#fff;
    transform:translateY(-8px);
}

.card:hover .card-hidden{
    opacity:1;
    max-height:200px;
    margin-top:15px;
}

/* ================= PROYECTOS ================= */

.proyectos-grid{
    margin-top:60px;
    display:grid;
    grid-template-columns:repeat(3, 1fr);
    gap:30px;
    opacity:1;
    transition:opacity .35s ease;
}

.proyectos-grid.fade-out{
    opacity:0;
}

.proyecto{
    overflow:hidden;
    border-radius:20px;
    cursor:pointer;
    position:relative;
    box-shadow:0 15px 35px rgba(0,0,0,0.08);
    transition:transform .3s ease, box-shadow .3s ease;
}

.proyecto:hover{
    transform:translateY(-6px);
    box-shadow:0 25px 50px rgba(0,0,0,0.15);
}

.proyecto img{
    width:100%;
    height:350px;
    object-fit:cover;
    transition:transform .6s ease;
}

.proyecto:hover img{
    transform:scale(1.06);
}

.overlay{
    position:absolute;
    inset:0;
    background:rgba(0,0,0,0.55);
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:1.2rem;
    font-weight:500;
    opacity:0;
    transition:opacity .3s ease;
}

.proyecto:hover .overlay{
    opacity:1;
}

/* ================= PAGINACIÓN ================= */

.pagination{
    margin-top:40px;
    display:flex;
    justify-content:center;
    gap:15px;
}

.pagination button{
    padding:10px 18px;
    border:none;
    background:#eee;
    cursor:pointer;
    border-radius:8px;
    transition:.3s;
}

.pagination button.active{
    background:var(--primary);
    color:#fff;
}

/* ================= CONTACTO ================= */

.contact-info{
    margin:30px 0;
    line-height:1.8;
}

.contact-buttons{
    display:flex;
    justify-content:center;
    gap:20px;
    flex-wrap:wrap;
}

.btn-contact{
    background:var(--primary);
    color:#fff;
    padding:14px 32px;
    border-radius:30px;
    text-decoration:none;
    transition:.3s;
    width: 100%;
    max-width: 320px;
    text-align: center;
}

.btn-contact:hover{
    transform:translateY(-3px);
}

.btn-contact.outline{
    background:transparent;
    border:2px solid #fff;
}

.btn-contact.outline:hover{
    background:#fff;
    color:#111;
}

/* ================= BACK TO TOP ================= */

.back-to-top{
    position:fixed;
    bottom:20px;
    right:20px;
    background:var(--primary);
    color:#fff;
    width:45px;
    height:45px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:50%;
    text-decoration:none;
    font-size:22px;
    opacity:0;
    visibility:hidden;
    transition:all .3s ease;
    box-shadow:0 10px 25px rgba(0,0,0,0.2);
}

.back-to-top.show{
    opacity:1;
    visibility:visible;
}

/* ================= MODAL ================= */

.modal{
    display:none;
    position:fixed;
    inset:0;
    background:rgba(0,0,0,.9);
    justify-content:center;
    align-items:center;
    z-index:2000;
}

.modal img{
    max-width:90%;
    max-height:80%;
    border-radius:20px;
}

.close-modal{
    position:absolute;
    top:30px;
    right:40px;
    font-size:3rem;
    color:#fff;
    cursor:pointer;
}

.modal-prev,
.modal-next{
    position:absolute;
    top:50%;
    transform:translateY(-50%);
    font-size:3rem;
    color:#fff;
    cursor:pointer;
    padding:20px;
}

.modal-prev{ left:30px; }
.modal-next{ right:30px; }

/* ================= RESPONSIVE ================= */

@media(max-width:1024px){

    .split{
        flex-direction:column;
        text-align:center;
    }

    .split img{
        height:350px;
    }

    .cards{
        flex-direction:column;
    }

    .proyectos-grid{
        grid-template-columns:repeat(2, 1fr);
    }
}

@media(max-width:600px){

    .nav{
        flex-direction:column;
        gap:15px;
    }

    .menu{
        gap:15px;
        flex-wrap:wrap;
        justify-content:center;
    }

    .hero .container{
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        padding: 0 20px;
    }

    .hero-content{
        width: 100%;
        text-align: center;
    }

    .hero-title{
        letter-spacing:1px;
        font-size: 2rem;
        line-height:1.2;
    }

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

    .proyecto img{
        height:280px;
    }

    .modal-prev,
    .modal-next{
        font-size:2rem;
        padding:10px;
    }
}

/* ================= VIDEOS ================= */

.video-grid{
    margin-top:60px;
    display:grid;
    grid-template-columns: repeat(3, 1fr);
    gap:30px;
}

/* contenedor clickeable */
.video-item{
    position:relative;
    cursor:pointer;
    border-radius:15px;
    overflow:hidden;
}

/*video*/
.video-item video{
    width:100%;
    height:220px;
    object-fit:cover;
    border-radius:15px;
    box-shadow:0 10px 30px rgba(0,0,0,0.08);
    transition:transform .3s ease, box-shadow .3s ease;
}

/*hover animación*/
.video-item:hover video{
    transform:scale(1.05);
    box-shadow:0 25px 50px rgba(0,0,0,0.15);
}

/*overlay tipo galería*/
.video-item::after{
    content:"Ver video";
    position:absolute;
    inset:0;
    background:rgba(0,0,0,0.4);
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    opacity:0;
    transition:.3s;
    font-size:1.2rem;
    font-weight:500;
}

.video-item:hover::after{
    opacity:1;
}
.video-prev,
.video-next{
    position:absolute;
    top:50%;
    transform:translateY(-50%);
    font-size:3rem;
    color:#fff;
    cursor:pointer;
    padding:20px;
}

.video-prev{ left:30px; }
.video-next{ right:30px; }

/*responsive*/

@media(max-width:1024px){
    .video-grid{
        grid-template-columns: repeat(2, 1fr);
    }
}

@media(max-width:600px){
    .video-grid{
        grid-template-columns: 1fr;
    }
}

/*secciones de titulo*/
.section h2{
    font-size: 1.8rem;
    margin-bottom: 40px;
    position: relative;
    display: inline-block;
}

/*línea decorativa título*/

.section h2::after{
    content: "";
    width: 60px;
    height: 4px;
    background-color: #f97316; 
    position: absolute;
    left: 50%;
    bottom: -10px;
    transform: translateX(-50%);
    border-radius: 2px;
}
/*animacion boton de contacto*/

.btn{
    transition: transform .3s ease, box-shadow .3s ease;
}

.btn:hover{
    transform: translateY(-5px);
    box-shadow:0 15px 35px rgba(0,0,0,0.2);
}

/*modal video*/
#videoModal video{
    max-width:90%;
    max-height:80%;
    border-radius:20px;
}

.close-video{
    position:absolute;
    top:30px;
    right:40px;
    font-size:3rem;
    color:#fff;
    cursor:pointer;
}