/* ====================================================================
   sections.css — secciones internas compartidas por los estilos B/C/D.
   El look se controla con variables que define cada estilo:
   --bg --surface --ink --muted --line --accent --accent-ink
   --radius --maxw --pcar-ar --btn-r --head-align
   ==================================================================== */
.sec{padding:var(--sec-pad,80px) 0;scroll-margin-top:76px}
.secwrap{max-width:var(--maxw,1180px);margin:0 auto;padding:0 28px}
.secwrap.narrow{max-width:780px}
.sechead{max-width:680px;margin:0 auto 44px;text-align:var(--head-align,center)}
.sechead h2{font-size:clamp(1.8rem,4vw,2.7rem);margin-bottom:12px}
.sechead p{color:var(--muted);font-size:1.05rem}

.x-btn{display:inline-flex;align-items:center;gap:.4em;font-weight:600;padding:.9em 1.7em;border-radius:var(--btn-r,999px);cursor:pointer;transition:.18s;text-decoration:none;border:0;font-family:inherit;font-size:1rem}
.x-btn--solid{background:var(--accent);color:var(--accent-ink,#fff)}
.x-btn--solid:hover{filter:brightness(.93)}
.x-btn--line{background:none;color:var(--ink);border:1.5px solid currentColor}
.x-btn--line:hover{background:var(--ink);color:var(--bg)}

/* pilares */
.pilars{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.pilar{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius,14px);padding:26px 22px}
.pilar__i{font-size:1.7rem}
.pilar h3{margin:12px 0 6px;font-size:1.1rem}
.pilar p{color:var(--muted);font-size:.95rem}

/* split (sistema / contacto) */
.split2{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split2__media{border-radius:var(--radius,14px);overflow:hidden;aspect-ratio:4/5}
.split2__media img{width:100%;height:100%;object-fit:cover}
.split2 h2{font-size:clamp(1.8rem,3.5vw,2.5rem);margin-bottom:14px}
.split2 .p{color:var(--muted);margin-bottom:8px}
.ticks{list-style:none;display:grid;gap:12px;margin:18px 0}
.ticks li{padding-left:26px;position:relative}
.ticks li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}
.warranty{background:var(--surface);border-left:4px solid var(--accent);padding:14px 16px;border-radius:8px;font-size:.95rem}

/* galería detalles */
.gal{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.gal figure{position:relative;border-radius:var(--radius,14px);overflow:hidden;aspect-ratio:4/3;margin:0}
.gal img{width:100%;height:100%;object-fit:cover}
.gal figcaption{position:absolute;left:14px;bottom:12px;color:#fff;font-weight:600;text-shadow:0 1px 8px rgba(0,0,0,.6)}

/* proceso */
.steps{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.steps li{text-align:center}
.steps li b{display:inline-flex;width:42px;height:42px;align-items:center;justify-content:center;border-radius:50%;background:var(--accent);color:var(--accent-ink,#fff);font-weight:700;margin-bottom:12px}
.steps h3{font-size:1rem;margin-bottom:4px}
.steps p{color:var(--muted);font-size:.88rem}

/* precios */
.prices{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius,14px);padding:28px 24px}
.pcard__v{font-size:1.9rem;font-weight:800}
.pcard__v span{font-size:1rem;font-weight:600;opacity:.7}
.pcard__l{color:var(--muted);margin-top:2px}
.pcard hr{border:0;border-top:1px solid var(--line);margin:16px 0}
.pcard ul{list-style:none;display:grid;gap:8px;font-size:.93rem;color:var(--muted)}
.pcard li::before{content:"– ";color:var(--accent)}
.secfoot{text-align:center;margin-top:34px}

/* faq */
.faq{display:grid;gap:12px}
.faqi{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:2px 20px}
.faqi summary{cursor:pointer;font-weight:600;padding:16px 0;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px}
.faqi summary::-webkit-details-marker{display:none}
.faqi summary::after{content:"+";color:var(--accent);font-size:1.3rem;line-height:1}
.faqi[open] summary::after{content:"–"}
.faqi p{padding:0 0 16px;color:var(--muted)}

/* contacto */
.clist{list-style:none;display:grid;gap:14px;margin:8px 0 18px}
.clist li{display:grid}
.clist span{font-size:.76rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}
.clist a{color:var(--accent);font-weight:600}
.cform{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius,14px);padding:26px}
.cform label{display:block;font-size:.88rem;font-weight:600;margin-bottom:14px}
.cform input,.cform textarea{width:100%;margin-top:6px;padding:.7em .9em;border:1px solid var(--line);border-radius:8px;font:inherit;background:var(--bg);color:var(--ink)}
.cform input:focus,.cform textarea:focus{outline:2px solid var(--accent);border-color:transparent}
.cform .two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.cform__note{font-size:.82rem;color:var(--muted);margin-top:10px;text-align:center}

/* carrusel en cards */
.pcar{position:relative;overflow:hidden;background:#cfc9bf;aspect-ratio:var(--pcar-ar,4/3)}
.pcar__cover{width:100%;height:100%;object-fit:cover;display:block;transition:transform .3s}
.card-project:hover .pcar__cover{transform:scale(1.04)}
.pcar__track{display:flex;height:100%;transition:transform .35s ease}
.pcar__track img{min-width:100%;width:100%;height:100%;object-fit:cover}
.pcar__track[role="button"]{cursor:zoom-in}
.pcar__nav{position:absolute;top:50%;transform:translateY(-50%);width:36px;height:36px;border:0;border-radius:50%;background:rgba(0,0,0,.5);color:#fff;font-size:1.25rem;cursor:pointer;opacity:0;transition:.15s;z-index:2}
.pcar:hover .pcar__nav{opacity:1}.pcar__prev{left:8px}.pcar__next{right:8px}
.pcar__nav:hover{background:var(--accent);color:var(--accent-ink,#000)}
.pcar__dots{position:absolute;bottom:8px;left:0;right:0;display:flex;gap:5px;justify-content:center;z-index:2}
.pcar__dot{width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.6)}.pcar__dot.is-on{background:#fff;width:15px;border-radius:3px}
.pcar__count{position:absolute;top:8px;right:8px;background:rgba(0,0,0,.55);color:#fff;font-size:.72rem;padding:.2em .6em;border-radius:999px;z-index:2}
.card-project{display:block}
.card-project__body{padding:16px 4px}
.card-project__body h3{font-size:1.2rem;margin-bottom:6px}
.tag{display:inline-block;font-size:.8rem;font-weight:600;color:var(--accent)}

/* renders (servicio independiente) */
.rgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.rgrid .rcard{border:0;padding:0;background:#cfc9bf;cursor:zoom-in;border-radius:var(--radius,14px);overflow:hidden;aspect-ratio:16/10}
.rgrid .rcard img{width:100%;height:100%;object-fit:cover;transition:transform .25s}
.rgrid .rcard:hover img{transform:scale(1.05)}
@media(max-width:900px){.rgrid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:560px){.rgrid{grid-template-columns:repeat(2,1fr)}}

/* precios a 2 columnas (sin card de adicionales) */
.prices--2{grid-template-columns:repeat(2,1fr);max-width:760px;margin-left:auto;margin-right:auto}

/* página de listado de proyectos */
.page-head{background:var(--surface);border-bottom:1px solid var(--line);padding:54px 0 40px;text-align:center}
.page-head h1{font-size:clamp(2rem,4vw,3rem)}
.page-head p{color:var(--muted);margin-top:10px;max-width:640px;margin-inline:auto}
.filters{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:0 0 32px}
.chip{border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:.5em 1.1em;border-radius:999px;font-weight:600;font-size:.9rem;cursor:pointer;transition:.15s;font-family:inherit}
.chip:hover{border-color:var(--accent)}
.chip.is-on{background:var(--accent);color:var(--accent-ink,#fff);border-color:var(--accent)}
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}

/* página de detalle de proyecto */
.pdetail__head{background:var(--surface);border-bottom:1px solid var(--line);padding:40px 0 34px}
.pdetail__head h1{font-size:clamp(1.8rem,4vw,2.8rem);margin-top:8px}
.back{color:var(--accent);font-weight:600;display:inline-block;margin-bottom:14px}
.pdetail__meta{color:var(--muted);margin-top:10px}
.pgallery{columns:3;column-gap:16px;padding:40px 0}
.pgallery .ph{break-inside:avoid;margin:0 0 16px;padding:0;border:0;background:none;cursor:zoom-in;width:100%;display:block;border-radius:var(--radius,14px);overflow:hidden}
.pgallery .ph img{width:100%;display:block;transition:transform .25s}
.pgallery .ph:hover img{transform:scale(1.03)}
.pdetail__cta{text-align:center;padding:10px 0 70px}
.pdetail__cta p{font-size:1.2rem;font-weight:600;margin-bottom:16px}
@media(max-width:900px){.pgrid{grid-template-columns:repeat(2,1fr)} .pgallery{columns:2}}
@media(max-width:560px){.pgrid{grid-template-columns:1fr} .prices--2{grid-template-columns:1fr} .pgallery{columns:1}}

/* lightbox */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(12,11,10,.94);display:none;align-items:center;justify-content:center}
.lightbox.open{display:flex}
.lb__img{max-width:90vw;max-height:88vh;object-fit:contain;border-radius:6px}
.lb__nav,.lb__close{position:absolute;background:rgba(255,255,255,.14);color:#fff;border:0;cursor:pointer;border-radius:50%}
.lb__nav{top:50%;transform:translateY(-50%);width:52px;height:52px;font-size:2rem}
.lb__prev{left:18px}.lb__next{right:18px}
.lb__nav:hover,.lb__close:hover{background:var(--accent);color:#000}
.lb__close{top:18px;right:18px;width:46px;height:46px;font-size:1.7rem}
.lb__count{position:absolute;bottom:18px;left:0;right:0;text-align:center;color:#fff;font-size:.9rem}

@media(max-width:900px){
  .pilars{grid-template-columns:repeat(2,1fr)}
  .gal{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .prices{grid-template-columns:1fr}
  .split2{grid-template-columns:1fr;gap:28px}
}
@media(max-width:560px){
  .pilars,.gal{grid-template-columns:1fr}
  .cform .two{grid-template-columns:1fr}
  .lb__nav{width:42px;height:42px}
}
@media(hover:none){ .pcar__nav{opacity:1} }