/* ============================================================
   ARKAP — arquitectura y desarrollo integral
   Identidad: brochure Portafolio 2026
   papel #f6f5f2 · tinta #141414 · rojo #e8232e · rojo oscuro #b5121b
   Display: Oswald (condensada) · Cuerpo: Jost (geométrica ligera)
   ============================================================ */

:root{
  --paper:#f6f5f2;
  --paper-2:#efede8;
  --ink:#141414;
  --ink-soft:#4c4a47;
  --red:#e8232e;
  --red-dark:#b5121b;
  --line:rgba(20,20,20,.16);
  --line-strong:rgba(20,20,20,.4);
  --frame:12px;
  --pad:clamp(1.25rem,4vw,4rem);
  --display:'Oswald',system-ui,sans-serif;
  --body:'Jost',system-ui,sans-serif;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001s!important;transition-duration:.001s!important}
}
body{
  font-family:var(--body);
  font-weight:300;
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;background:none;border:none;cursor:pointer;color:inherit}

/* textura papel sutil (como el brochure) */
body::before{
  content:'';position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.35;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 .08 0 0 0 0 .08 0 0 0 0 .07 0 0 0 .05 0'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- marco de hoja de portafolio (firma) ---- */
.sheet-frame{
  position:fixed;inset:var(--frame);z-index:80;pointer-events:none;
  border:1px solid var(--line-strong);
}
@media (max-width:820px){.sheet-frame{display:none}}

main{position:relative;z-index:1}

/* ============ NAV ============ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;
  padding:calc(var(--frame) + .65rem) calc(var(--frame) + 1.4rem);
  transition:background .35s,box-shadow .35s,padding .35s;
}
.nav.solid{
  background:rgba(246,245,242,.97);
  box-shadow:0 1px 0 var(--line);
  padding-top:.6rem;padding-bottom:.6rem;
}
/* blur solo en desktop: en móvil backdrop-filter rompe el menú fijo (containing block en Safari) */
@media (min-width:1081px){
  .nav.solid{background:rgba(246,245,242,.9);backdrop-filter:blur(10px)}
}
.nav-brand{display:flex;align-items:center;gap:.6rem}
.nav-brand img{height:30px;width:auto}
.nav-brand .word{
  font-family:var(--display);font-weight:600;font-size:1.25rem;letter-spacing:.02em;
}
.nav-links{display:flex;gap:1.6rem;list-style:none;align-items:center}
.nav-links a{
  font-family:var(--display);font-weight:400;font-size:.78rem;
  text-transform:uppercase;letter-spacing:.14em;
  padding:.2rem 0;position:relative;
}
.nav-links a::after{
  content:'';position:absolute;left:0;bottom:-2px;height:2px;width:0;
  background:var(--red);transition:width .25s;
}
.nav-links a:hover::after,.nav-links a:focus-visible::after{width:100%}
.nav-cta{
  border:1px solid var(--ink);padding:.45rem 1.1rem !important;
}
.nav-cta:hover{background:var(--ink);color:#fff}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:.4rem;z-index:70}
.nav-toggle span{width:24px;height:2px;background:var(--ink);transition:transform .3s,opacity .3s}
@media (max-width:1080px){
  .nav-toggle{display:flex}
  .nav-links{
    position:fixed;top:0;left:0;width:100%;height:100dvh;background:var(--paper);
    flex-direction:column;justify-content:center;gap:1.4rem;
    visibility:hidden;opacity:0;transform:translateY(-14px);
    transition:opacity .3s,transform .3s,visibility 0s .3s;
    z-index:65;
  }
  .nav-links.open{visibility:visible;opacity:1;transform:none;transition:opacity .3s,transform .3s}
  .nav-links a{font-size:1.3rem}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}

/* ============ HERO — portada del brochure ============ */
.hero{
  min-height:100svh;position:relative;display:flex;align-items:center;justify-content:center;
  overflow:hidden;
}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover}
.hero-bg::after{
  content:'';position:absolute;inset:0;
  background:rgba(246,245,242,.82);
}
.hero-inner{position:relative;text-align:center;padding:0 var(--pad)}
.hero-logo{width:clamp(150px,20vw,230px);margin:0 auto 1.2rem;opacity:0;animation:rise 1s .2s forwards}
.hero-tagline{
  font-family:var(--body);font-weight:300;font-style:italic;
  font-size:clamp(1rem,2.2vw,1.35rem);letter-spacing:.06em;color:var(--ink);
  opacity:0;animation:rise 1s .55s forwards;
}
.hero-kicker{
  margin-top:2.6rem;font-family:var(--display);text-transform:uppercase;
  font-size:.78rem;letter-spacing:.34em;color:var(--ink);
  opacity:0;animation:rise 1s .85s forwards;
}
.hero-kicker .bar{color:var(--red)}
.hero-scroll{
  position:absolute;bottom:calc(var(--frame) + 1.4rem);left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:.5rem;
  font-family:var(--display);font-size:.65rem;letter-spacing:.3em;text-transform:uppercase;
  color:var(--ink-soft);opacity:0;animation:rise 1s 1.2s forwards;
}
.hero-scroll::after{
  content:'';width:1px;height:44px;background:var(--red);
  animation:drip 2.2s ease-in-out infinite;transform-origin:top;
}
@keyframes rise{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
@keyframes drip{0%,100%{transform:scaleY(.35)}50%{transform:scaleY(1)}}

/* ============ SECCIONES ============ */
.sec{padding:clamp(4.5rem,9vw,8rem) var(--pad)}
.sec-inner{max-width:1340px;margin:0 auto}
.sec-alt{background:var(--paper-2)}

/* header de sección = header de página del brochure */
.sec-head{margin-bottom:clamp(2.2rem,5vw,3.6rem)}
.sec-head .row{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem}
.sec-head h2{
  font-family:var(--display);font-weight:600;text-transform:uppercase;
  font-size:clamp(2.1rem,5vw,3.6rem);line-height:1.02;letter-spacing:.01em;
}
.sec-head .mark{width:clamp(30px,3.4vw,44px);flex:none;margin-bottom:.35rem}
.sec-head .sub{
  font-style:italic;font-size:clamp(1rem,2vw,1.3rem);color:var(--ink-soft);
  letter-spacing:.05em;margin-top:.35rem;
}
.sec-head hr{
  border:none;border-top:1px solid var(--line-strong);margin-top:1.1rem;
}
.sec-head .lead{
  max-width:62ch;margin-top:1.4rem;font-size:clamp(1rem,1.6vw,1.15rem);color:var(--ink-soft);
}

/* reveal on scroll */
.rv{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s ease}
.rv.in{opacity:1;transform:none}
/* auditoría visual */
body.static .rv{opacity:1;transform:none;transition:none}
body.static .hero{min-height:780px}
body.static .hero-logo,body.static .hero-tagline,body.static .hero-kicker,body.static .hero-scroll{opacity:1;animation:none}

/* ============ NOSOTROS ============ */
.manifesto{max-width:900px}
.manifesto p{
  font-size:clamp(1.25rem,2.6vw,1.9rem);font-style:italic;font-weight:300;
  line-height:1.5;letter-spacing:.01em;
}
.manifesto p + p{margin-top:1.6rem}
.manifesto strong{font-weight:500;font-style:normal;color:var(--red-dark)}
.manifesto .firma{
  margin-top:2.6rem;display:flex;align-items:center;gap:1rem;
  font-family:var(--display);text-transform:uppercase;font-size:.8rem;letter-spacing:.26em;
  color:var(--ink-soft);font-style:normal;
}
.manifesto .firma::before{content:'';width:56px;height:1px;background:var(--red)}

/* ============ SERVICIOS ============ */
.services{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));
  border-top:1px solid var(--line);border-left:1px solid var(--line);
}
.service{
  border-right:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:1.8rem 1.6rem 2rem;position:relative;overflow:hidden;
  transition:background .3s;
}
.service:hover{background:#fff}
.service .n{
  font-family:var(--display);font-size:.72rem;letter-spacing:.22em;color:var(--red);
}
.service h3{
  font-family:var(--display);font-weight:500;text-transform:uppercase;
  font-size:1.25rem;margin:.55rem 0 .5rem;letter-spacing:.03em;
}
.service p{font-size:.95rem;color:var(--ink-soft)}
.service::after{
  content:'';position:absolute;left:0;bottom:0;height:3px;width:0;background:var(--red);
  transition:width .35s;
}
.service:hover::after{width:100%}

/* ============ GALERÍAS ============ */
.chips{display:flex;flex-wrap:wrap;gap:.55rem;margin-bottom:2rem}
.chip{
  font-family:var(--display);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;
  border:1px solid var(--line-strong);padding:.42rem 1rem;transition:all .25s;
}
.chip:hover{border-color:var(--ink)}
.chip.active{background:var(--ink);color:#fff;border-color:var(--ink)}

.grid{display:grid;gap:1.1rem;grid-template-columns:repeat(3,1fr)}
.grid.cols2{grid-template-columns:repeat(2,1fr)}
@media (max-width:960px){.grid,.grid.cols2{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.grid,.grid.cols2{grid-template-columns:1fr}}

.tile{
  position:relative;overflow:hidden;cursor:zoom-in;background:#ddd;
  aspect-ratio:1389/983;border:none;padding:0;display:block;width:100%;
}
.tile.hidden{display:none}
.tile img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.tile:hover img,.tile:focus-visible img{transform:scale(1.045)}
.tile .cap{
  position:absolute;inset:auto 0 0 0;padding:2.2rem 1rem .8rem;
  background:linear-gradient(transparent,rgba(10,10,10,.72));
  color:#fff;display:flex;align-items:baseline;gap:.5rem;
  opacity:0;transform:translateY(8px);transition:all .35s;
  text-align:left;
}
.tile:hover .cap,.tile:focus-visible .cap{opacity:1;transform:none}
.tile .cap .t{font-family:var(--display);text-transform:uppercase;font-size:1rem;letter-spacing:.06em}
.tile .cap .d{font-style:italic;font-size:.85rem;opacity:.85}
@media (hover:none){.tile .cap{opacity:1;transform:none;padding-top:1.4rem}}

.gal-more{margin-top:1.8rem;text-align:center}

/* botón estándar */
.btn{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--display);text-transform:uppercase;font-size:.8rem;letter-spacing:.2em;
  border:1px solid var(--ink);padding:.8rem 1.9rem;transition:all .25s;background:transparent;
}
.btn:hover{background:var(--ink);color:#fff}
.btn.red{border-color:var(--red);background:var(--red);color:#fff}
.btn.red:hover{background:var(--red-dark);border-color:var(--red-dark)}

/* ============ PLANTAS ============ */
.plantas{display:grid;gap:2.5rem}
.planta figure{border:1px solid var(--line);background:#fff;padding:.8rem}
.planta img{width:100%}
.planta figcaption{
  display:flex;justify-content:space-between;align-items:baseline;
  padding:.9rem .4rem .2rem;
}
.planta .t{font-family:var(--display);text-transform:uppercase;font-weight:500;font-size:1.1rem;letter-spacing:.04em}
.planta .d{font-style:italic;color:var(--ink-soft);font-size:.9rem}

/* ============ VIDEOS ============ */
.videos{display:grid;gap:1.1rem;grid-template-columns:repeat(3,1fr)}
@media (max-width:960px){.videos{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.videos{grid-template-columns:1fr}}
.video{position:relative;aspect-ratio:16/9;overflow:hidden;background:#000;cursor:pointer;border:none;padding:0;width:100%}
.video.hidden{display:none}
.video img{width:100%;height:100%;object-fit:cover;opacity:.92;transition:transform .6s,opacity .3s}
.video:hover img{transform:scale(1.045);opacity:1}
.video .play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:58px;height:58px;background:var(--red);border-radius:12px 12px 12px 4px;
  display:flex;align-items:center;justify-content:center;transition:background .25s,transform .25s;
}
.video:hover .play{background:var(--red-dark);transform:translate(-50%,-50%) scale(1.08)}
.video .play::after{
  content:'';border-style:solid;border-width:9px 0 9px 15px;
  border-color:transparent transparent transparent #fff;margin-left:3px;
}
.video .vcap{
  position:absolute;left:0;right:0;bottom:0;padding:1.6rem .9rem .7rem;
  background:linear-gradient(transparent,rgba(0,0,0,.75));color:#fff;
  font-family:var(--display);text-transform:uppercase;font-size:.92rem;letter-spacing:.08em;
  text-align:left;
}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* ============ 360 / DRONE ============ */
.split{display:grid;grid-template-columns:1.15fr 1fr;gap:clamp(1.6rem,4vw,3.5rem);align-items:center}
@media (max-width:900px){.split{grid-template-columns:1fr}}
.split .img-wrap{border:1px solid var(--line);padding:.8rem;background:#fff}
.split h3{
  font-family:var(--display);text-transform:uppercase;font-weight:600;
  font-size:clamp(1.5rem,3vw,2.2rem);line-height:1.05;
}
.split .txt p{margin:1rem 0 1.6rem;color:var(--ink-soft);font-size:1.05rem}

.drone-band{display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem;margin-top:2.4rem}
@media (max-width:960px){.drone-band{grid-template-columns:repeat(2,1fr)}}

/* ============ CONTACTO ============ */
.contact{background:var(--ink);color:#f2efe9;position:relative}
.contact .sec-head h2{color:#fff}
.contact .sec-head .sub{color:rgba(242,239,233,.65)}
.contact .sec-head hr{border-color:rgba(255,255,255,.25)}
.contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:clamp(2rem,5vw,4rem)}
@media (max-width:900px){.contact-grid{grid-template-columns:1fr}}
.contact .big{
  font-family:var(--display);text-transform:uppercase;font-weight:600;
  font-size:clamp(2rem,4.6vw,3.4rem);line-height:1.05;
}
.contact .big em{font-style:normal;color:var(--red)}
.c-items{display:grid;gap:1.5rem;align-content:start}
.c-item .lbl{
  font-family:var(--display);text-transform:uppercase;font-size:.7rem;
  letter-spacing:.28em;color:rgba(242,239,233,.55);margin-bottom:.35rem;
}
.c-item a{font-size:1.15rem;font-weight:400;border-bottom:1px solid transparent;transition:border-color .2s,color .2s}
.c-item a:hover{color:#fff;border-color:var(--red)}
.c-buttons{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:2.2rem}
.contact .servicios-line{
  margin-top:3.5rem;padding-top:1.6rem;border-top:1px solid rgba(255,255,255,.16);
  font-style:italic;font-size:.95rem;color:rgba(242,239,233,.6);
}
.footer{
  background:var(--ink);color:rgba(242,239,233,.5);
  padding:1.4rem var(--pad) calc(var(--frame) + 1.2rem);
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;
  font-size:.85rem;border-top:1px solid rgba(255,255,255,.12);
}
.footer a{color:rgba(242,239,233,.8)}
.footer a:hover{color:#fff}

/* ============ LIGHTBOX ============ */
.lb{
  position:fixed;inset:0;z-index:100;background:rgba(12,12,12,.95);
  display:none;align-items:center;justify-content:center;
}
.lb.open{display:flex}
.lb img{max-width:92vw;max-height:84vh;object-fit:contain}
.lb .lb-cap{
  position:absolute;bottom:1.6rem;left:50%;transform:translateX(-50%);
  color:#fff;font-family:var(--display);text-transform:uppercase;letter-spacing:.1em;
  font-size:.9rem;display:flex;gap:1rem;align-items:baseline;white-space:nowrap;
}
.lb .lb-cap .cnt{color:rgba(255,255,255,.5);font-size:.75rem;letter-spacing:.2em}
.lb button{
  position:absolute;color:#fff;font-size:1.6rem;line-height:1;padding:1rem;
  opacity:.7;transition:opacity .2s;
}
.lb button:hover{opacity:1}
.lb .lb-close{top:calc(var(--frame) + .4rem);right:calc(var(--frame) + .8rem);font-size:2rem}
.lb .lb-prev{left:.6rem;top:50%;transform:translateY(-50%)}
.lb .lb-next{right:.6rem;top:50%;transform:translateY(-50%)}

:focus-visible{outline:2px solid var(--red);outline-offset:3px}