/* ======================================================
   style.css – YPF Argentina
   Diseño: “Corporativo” + “Asimétrico”   Esquema: Tetrada
   Fuentes: Raleway (titulares) | Open Sans (texto)
   ====================================================== */

/* ---------- 1. Variables de Tema ---------- */
:root{
    --color-primary:#004E89;           /* Azul Profundo */
    --color-primary-dark:#003865;
    --color-accent:#F26A1B;            /* Naranja Vibrante */
    --color-accent-dark:#c65413;
    --color-secondary:#3AB795;        /* Verde Agua */
    --color-secondary-dark:#2c8670;
    --color-tertiary:#8D3FC8;         /* Púrpura */
    --color-tertiary-dark:#662c96;

    --color-light:#FFFFFF;
    --color-dark:#222222;
    --color-gray:#666666;
    --radius-sm:6px;
    --radius-md:12px;
    --transition-fast:.25s ease;
    --transition-medium:.45s cubic-bezier(.25,.8,.25,1);

    /* Gradientes utilitarios */
    --gradient-hero:linear-gradient(135deg,rgba(0,0,0,.65),rgba(0,0,0,.25));
    --gradient-glass:linear-gradient(135deg,rgba(255,255,255,.15),rgba(255,255,255,.05));
}

/* ---------- 2. Reset Suave ---------- */
*,
*::before,
*::after{
    box-sizing:border-box;
    margin:0;
    padding:0;
}
html{
    scroll-behavior:smooth;
}
body{
    font-family:'Open Sans',Arial,Helvetica,sans-serif;
    color:var(--color-dark);
    line-height:1.6;
    background:#f8f9fa;
    -webkit-font-smoothing:antialiased;
}

/* ---------- 3. Tipografía ---------- */
h1,h2,h3,h4,h5{
    font-family:'Raleway',sans-serif;
    font-weight:700;
    line-height:1.2;
    color:var(--color-dark);
    text-align:center;
}
.section-title{
    margin-bottom:2rem;
    font-size:clamp(1.6rem,2.5vw,2.4rem);
    position:relative;
}
.section-title::after{
    content:'';
    width:60px;
    height:4px;
    background:var(--color-accent);
    display:block;
    margin:0.5rem auto 0;
    border-radius:var(--radius-sm);
}

/* ---------- 4. Utilidades de Layout ---------- */
.container{
    width:90%;
    max-width:1200px;
    margin-inline:auto;
}
.flex{
    display:flex;
    flex-wrap:wrap;
}
.grid{
    display:grid;
    gap:2rem;
}

/* ---------- 5. Navegación Fija ---------- */
.header{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    background:var(--color-light);
    box-shadow:0 2px 10px rgba(0,0,0,.05);
    z-index:999;
}
.header .container{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:.75rem 0;
}
.logo{
    font-family:'Raleway',sans-serif;
    font-weight:800;
    font-size:1.5rem;
    color:var(--color-primary);
    text-decoration:none;
}
.nav ul{
    list-style:none;
    display:flex;
    gap:1.5rem;
}
.nav a{
    color:var(--color-dark);
    text-decoration:none;
    font-weight:600;
    position:relative;
    padding:.25rem 0;
}
.nav a::after{
    content:'';
    position:absolute;
    left:0;bottom:-4px;
    width:0;height:2px;
    background:var(--color-accent);
    transition:width var(--transition-fast);
}
.nav a:hover::after{width:100%;}
.burger{
    display:none;
    flex-direction:column;
    gap:4px;
    background:none;
    border:none;
    cursor:pointer;
}
.burger span{
    width:25px;height:3px;
    background:var(--color-dark);
    border-radius:2px;
}
/* ------- Mobile Nav ------- */
@media(max-width:768px){
    .nav ul{
        position:absolute;
        top:100%;left:0;
        flex-direction:column;
        background:var(--color-light);
        width:100%;gap:0;
        max-height:0;
        overflow:hidden;
        transition:max-height var(--transition-medium);
        box-shadow:0 10px 15px rgba(0,0,0,.1);
    }
    .nav ul.open{max-height:350px;}
    .nav li{border-top:1px solid #eee;text-align:center;}
    .burger{display:flex;}
}

/* ---------- 6. Hero ---------- */
.hero{
    width:100%;
    color:var(--color-light);
    background:var(--gradient-hero),url('../image/estacion-ypf-nocturna.jpg') center/cover no-repeat;
}
.hero .container{
    padding:calc(6rem + 80px) 0 5rem; /* 80px para header fijo */
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    gap:1.5rem;
}
.hero-title{
    font-size:clamp(2rem,4vw,3rem);
    max-width:700px;
    text-shadow:1px 2px 4px rgba(0,0,0,.7);
}
.hero-text{
    font-size:1.125rem;
    max-width:550px;
}

/* ---------- 7. Botones Globales ---------- */
.btn,
button,
input[type='submit']{
    display:inline-block;
    background:var(--color-accent);
    color:var(--color-light);
    padding:.75rem 1.75rem;
    border:none;
    border-radius:var(--radius-md);
    font-weight:700;
    text-decoration:none;
    cursor:pointer;
    transition:background var(--transition-fast),transform var(--transition-fast);
}
.btn:hover,
button:hover,
input[type='submit']:hover{
    background:var(--color-accent-dark);
    transform:translateY(-2px);
}
.btn:active,
button:active,
input[type='submit']:active{
    transform:translateY(0);
}

/* ---------- 8. Secciones Generales ---------- */
.section{
    padding:4rem 0;
}
@media(max-width:576px){.section{padding:3rem 0;}}

/* ---------- 9. Cards ---------- */
.cards-row{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
    gap:2rem;
}
.card{
    background:var(--color-light);
    border-radius:var(--radius-md);
    overflow:hidden;
    box-shadow:0 4px 12px rgba(0,0,0,.06);
    display:flex;
    flex-direction:column;
    align-items:center;
    text-align:center;
    transition:transform var(--transition-fast),box-shadow var(--transition-fast);
}
.card:hover{
    transform:translateY(-6px);
    box-shadow:0 6px 18px rgba(0,0,0,.1);
}
.card-image{
    width:100%;
    height:200px;
    overflow:hidden;
}
.card-image img{
    width:100%;
    height:100%;
    object-fit:cover;
    display:block;
    margin:0 auto;
}
.card-content{
    padding:1.25rem 1rem 2rem;
}
.card-content h3{
    margin-bottom:.75rem;
    font-size:1.25rem;
    color:var(--color-primary);
}
.card-content p{color:var(--color-gray);}

/* ---------- 10. Links “Leer más” ---------- */
.link-readmore{
    display:inline-block;
    color:var(--color-primary);
    font-weight:600;
    margin-top:1rem;
    position:relative;
}
.link-readmore::after{
    content:'';
    position:absolute;
    left:0;bottom:-3px;
    height:2px;width:100%;
    background:var(--color-primary);
    transform:scaleX(0);
    transform-origin:left center;
    transition:transform var(--transition-fast);
}
.link-readmore:hover::after{transform:scaleX(1);}

/* ---------- 11. Metodología ---------- */
.switch-label{
    display:inline-flex;
    align-items:center;
    gap:.5rem;
    font-weight:600;
    margin-top:1.5rem;
}
.switch-label input{display:none;}
.switch-slider{
    width:42px;height:22px;
    background:#ccc;
    border-radius:11px;
    position:relative;
    transition:background var(--transition-fast);
}
.switch-slider::before{
    content:'';
    position:absolute;
    top:2px;left:2px;
    width:18px;height:18px;
    background:var(--color-light);
    border-radius:50%;
    transition:transform var(--transition-fast);
}
input:checked + .switch-slider{
    background:var(--color-secondary);
}
input:checked + .switch-slider::before{
    transform:translateX(20px);
}

/* Slider rango */
.slider-container{
    margin-top:2rem;
    width:100%;
    max-width:380px;
}
.slider-container input[type='range']{
    width:100%;
    accent-color:var(--color-tertiary);
}

/* ---------- 12. Comunidad ---------- */
.community{
    background:var(--color-secondary);
    color:var(--color-light);
}
.community p{max-width:800px;margin-inline:auto;}

/* ---------- 13. Testimonios ---------- */
.testimonials .card{
    max-width:400px;
    margin-inline:auto;
}
.testimonials .card-content p{
    font-style:italic;
    color:var(--color-dark);
}
.testimonials strong{display:block;margin-top:.75rem;color:var(--color-accent);}

/* ---------- 14. Contacto ---------- */
.contact form{
    width:100%;
    max-width:600px;
    margin-inline:auto;
    display:flex;
    flex-direction:column;
    gap:1.5rem;
}
.form-group{
    display:flex;
    flex-direction:column;
    gap:.5rem;
}
input[type='text'],
input[type='email'],
textarea{
    padding:.75rem 1rem;
    border:2px solid #e0e0e0;
    border-radius:var(--radius-sm);
    font-family:inherit;
    font-size:1rem;
    transition:border var(--transition-fast),box-shadow var(--transition-fast);
}
input:focus,
textarea:focus{
    border-color:var(--color-primary);
    box-shadow:0 0 0 3px rgba(0,78,137,.1);
    outline:none;
}

/* ---------- 15. Footer ---------- */
.footer{
    background:var(--color-primary-dark);
    color:var(--color-light);
    padding:2rem 0;
    text-align:center;
}
.footer nav{
    margin-bottom:1rem;
}
.footer a{
    color:var(--color-secondary);
    text-decoration:none;
    margin:0 .5rem;
    transition:color var(--transition-fast);
}
.footer a:hover{color:var(--color-accent);}

/* ---------- 16. Social Links Texto ---------- */
.social-links{
    margin-bottom:1rem;
}
.social-links a{
    font-weight:700;
}

/* ---------- 17. Success Page ---------- */
.success-page,
.success-page main{
    min-height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    flex-direction:column;
    gap:1.5rem;
}

/* ---------- 18. Ajustes para Privacy & Terms ---------- */
.legal-page{
    padding-top:100px;
}

/* ---------- 19. Imágenes de Fondo Utilitarias ---------- */
.bg-cover{
    background-size:cover;
    background-repeat:no-repeat;
    background-position:center;
}
/* Aplica un overlay oscuro donde se necesite */
.bg-dark-overlay::before{
    content:'';
    position:absolute;
    inset:0;
    background:rgba(0,0,0,.45);
}

/* ---------- 20. Scroll & Parallax Effects ---------- */
[data-reveal]{
    opacity:0;
    transform:translateY(40px);
    transition:opacity .6s ease,transform .6s ease;
}
[data-reveal].is-visible{
    opacity:1;
    transform:none;
}
/* ---------- 21. Glassmorphism ---------- */
.glass{
    background:var(--gradient-glass);
    backdrop-filter:blur(12px);
    border:1px solid rgba(255,255,255,.25);
    border-radius:var(--radius-md);
}

/* ---------- 22. Media Queries para Asimetría ---------- */
@media(min-width:992px){
    /* Distribución asimétrica para hero */
    .hero .container{
        flex-direction:row;
        justify-content:space-between;
        align-items:center;
        text-align:left;
    }
    .hero-text{margin-left:2rem;}
}

/* ---------- 23. Misc ---------- */
img{
    max-width:100%;
    height:auto;
}