/* ==========================================================
   NOSTROMO STUDIO — styles.css
   Presentación limpia sobre blanco. Colores del logotipo:
   carbón, grises de las aspas y naranja (solo como acento).
   ========================================================== */

:root {
  --white: #ffffff;
  --ink: #222326;
  --text: #4a4c50;
  --mute: #8d9094;
  --line: #e7e7e6;
  --soft: #f6f6f5;
  --orange: #f08a2e;

  --font: "Outfit", "Helvetica Neue", Arial, sans-serif;
  --pad: clamp(22px, 6vw, 110px);
  --max: 1280px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font);
  font-weight: 300;
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
::selection { background: var(--ink); color: var(--white); }
:focus-visible { outline: 1.5px solid var(--orange); outline-offset: 4px; }

/* ---------- Aparición suave (con red de seguridad) ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 1.2s var(--ease), transform 1.2s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-split] { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ---------- Tipografía común ---------- */
.label {
  margin: 0 0 40px;
  font-size: 12px; font-weight: 400;
  letter-spacing: .32em; text-transform: uppercase;
  color: var(--mute);
}
.label b { font-weight: 500; color: var(--orange); margin-right: 14px; letter-spacing: .1em; }
.title { margin: 0; font-weight: 200; font-size: clamp(34px, 4.4vw, 62px); line-height: 1.1; letter-spacing: -.015em; }

/* ==========================================================
   CABECERA
   ========================================================== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  height: 88px; padding: 0 var(--pad);
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(255,255,255,0); border-bottom: 1px solid transparent;
  transition: background-color .5s, border-color .5s, height .5s var(--ease);
}
.header.is-scrolled { background: rgba(255,255,255,.94); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-color: var(--line); height: 72px; }
.header__logo img { height: 46px; width: auto; transition: opacity .5s, height .5s var(--ease); }
.header.is-scrolled .header__logo img { height: 40px; }
/* En portada el logo grande ya está presente: el de la cabecera aparece al bajar */
.header:not(.is-scrolled) .header__logo { opacity: 0; pointer-events: none; }
.header__logo { transition: opacity .5s; }

.nav { display: flex; gap: clamp(24px, 3vw, 46px); }
.nav a { font-size: 13px; font-weight: 400; letter-spacing: .2em; text-transform: uppercase; color: var(--ink); position: relative; padding: 4px 0; }
.nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px; background: var(--orange); transform: scaleX(0); transition: transform .6s var(--ease); }
.nav a:hover::after, .nav a.is-current::after { transform: scaleX(1); }

.burger { display: none; width: 44px; height: 44px; position: relative; z-index: 2; }
.burger span { position: absolute; left: 11px; right: 11px; height: 1px; background: var(--ink); transition: transform .5s var(--ease), top .5s var(--ease); }
.burger span:first-child { top: 18px; } .burger span:last-child { top: 25px; }
.menu-open .burger span:first-child { top: 22px; transform: rotate(45deg); }
.menu-open .burger span:last-child { top: 22px; transform: rotate(-45deg); }

/* ==========================================================
   PORTADA
   ========================================================== */
.hero {
  min-height: 100svh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  padding: 120px var(--pad) 110px;
  position: relative;
}
.hero__logo { margin: 0; width: min(440px, 72vw); animation: logoIn 1.8s var(--ease) both .1s; }
.hero__logo img { width: 100%; }
@keyframes logoIn { from { opacity: 0; transform: translateY(14px); filter: blur(6px); } to { opacity: 1; transform: none; filter: none; } }

.hero__rule { display: block; width: 1px; height: 64px; background: var(--line); margin: 56px 0 34px; transform-origin: top; animation: ruleIn 1.2s var(--ease) both 1s; }
@keyframes ruleIn { from { transform: scaleY(0); } to { transform: scaleY(1); } }
.hero__claim { margin: 0 0 12px; font-size: 13px; font-weight: 400; letter-spacing: .36em; text-transform: uppercase; color: var(--ink); animation: fadeUp 1.2s var(--ease) both 1.3s; }
.hero__sectors { margin: 0; font-size: 16px; color: var(--mute); animation: fadeUp 1.2s var(--ease) both 1.5s; }
.hero__sectors i { font-style: normal; color: var(--orange); margin: 0 .5em; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.hero__down { position: absolute; bottom: 34px; left: 50%; width: 30px; height: 46px; margin-left: -15px; animation: fadeUp 1s var(--ease) both 2s; }
.hero__down span { position: absolute; left: 50%; top: 0; width: 1px; height: 100%; background: var(--line); overflow: hidden; }
.hero__down span::after { content: ""; position: absolute; left: 0; top: 0; width: 1px; height: 40%; background: var(--ink); animation: drip 2.4s var(--ease) infinite; }
@keyframes drip { 0% { transform: translateY(-100%); } 70%, 100% { transform: translateY(260%); } }

/* ==========================================================
   SECCIONES
   ========================================================== */
.section { padding: clamp(100px, 13vw, 180px) var(--pad); max-width: calc(var(--max) + var(--pad) * 2); margin: 0 auto; }
.section + .section { border-top: 1px solid var(--line); }

/* --- Estudio --- */
.about { display: grid; grid-template-columns: 1fr 3fr; gap: 40px; }
.about__lead { margin: 0 0 60px; font-weight: 200; font-size: clamp(28px, 3.3vw, 46px); line-height: 1.28; letter-spacing: -.01em; color: var(--ink); max-width: 20em; }
.about__cols { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 4vw, 70px); }
.about__cols p { margin: 0; color: var(--text); }
.about__cols p:nth-child(2) { transition-delay: .12s; }

/* --- Servicios --- */
.sectors { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.sector { padding: 40px 30px 46px 0; position: relative; }
.sector + .sector { padding-left: 30px; border-left: 1px solid var(--line); }
.sector::before { content: ""; position: absolute; left: 0; right: 0; top: -1px; height: 1px; background: var(--orange); transform: scaleX(0); transform-origin: left; transition: transform .9s var(--ease); }
.sector:hover::before { transform: scaleX(1); }
.sector:nth-child(2) { transition-delay: .08s; } .sector:nth-child(3) { transition-delay: .16s; } .sector:nth-child(4) { transition-delay: .24s; }
.sector__n { display: block; font-size: 12px; letter-spacing: .1em; color: var(--orange); font-weight: 400; margin-bottom: 26px; }
.sector h2 { margin: 0 0 12px; font-size: clamp(21px, 1.8vw, 26px); font-weight: 400; letter-spacing: -.005em; line-height: 1.2; }
.sector p { margin: 0; font-size: 15px; color: var(--mute); line-height: 1.6; }

.scope { list-style: none; margin: 70px 0 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 0; }
.scope li { font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--text); font-weight: 400; }
.scope li + li::before { content: ""; display: inline-block; width: 4px; height: 4px; border-radius: 50%; background: var(--orange); vertical-align: middle; margin: 0 22px; position: relative; top: -1px; }

/* --- Galería --- */
.gallery__head { display: flex; flex-direction: column; margin-bottom: 60px; }
.gallery__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(10px, 1.4vw, 20px); }
.shot { position: relative; overflow: hidden; aspect-ratio: 4 / 3; background: var(--soft); display: block; }
.shot img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.6s var(--ease), filter 1s var(--ease); filter: saturate(.85); }
.shot span {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 40px 20px 16px; text-align: left;
  font-size: 11px; letter-spacing: .28em; text-transform: uppercase; font-weight: 400; color: #fff;
  background: linear-gradient(to top, rgba(20,20,22,.55), rgba(20,20,22,0));
  opacity: 0; transform: translateY(6px); transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.shot:hover img, .shot:focus-visible img { transform: scale(1.04); filter: saturate(1); }
.shot:hover span, .shot:focus-visible span { opacity: 1; transform: none; }
.gallery__grid .shot:nth-child(3n+2) { transition-delay: .1s; }
.gallery__grid .shot:nth-child(3n) { transition-delay: .2s; }

/* --- Contacto --- */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(50px, 8vw, 140px); align-items: start; }
.contact .title { margin-bottom: 50px; }
.contact__data { margin: 0; }
.contact__data div { display: grid; grid-template-columns: 110px 1fr; padding: 16px 0; border-top: 1px solid var(--line); }
.contact__data div:last-child { border-bottom: 1px solid var(--line); }
.contact__data dt { font-size: 11px; letter-spacing: .28em; text-transform: uppercase; color: var(--mute); padding-top: 4px; }
.contact__data dd { margin: 0; font-size: 17px; font-weight: 400; overflow-wrap: anywhere; }
.contact__data a { background: linear-gradient(var(--orange), var(--orange)) 0 100% / 0 1px no-repeat; transition: background-size .6s var(--ease); }
.contact__data a:hover { background-size: 100% 1px; }

.form { padding-top: 8px; }
.field { display: block; margin-bottom: 30px; }
.field span { display: block; font-size: 11px; letter-spacing: .28em; text-transform: uppercase; color: var(--mute); margin-bottom: 4px; }
.field input, .field textarea {
  width: 100%; border: 0; border-bottom: 1px solid var(--line); background: transparent; border-radius: 0;
  font: inherit; font-weight: 300; font-size: 17px; color: var(--ink); padding: 8px 0 12px; outline: none; resize: vertical;
  transition: border-color .4s;
}
.field input:focus, .field textarea:focus { border-color: var(--ink); }
.field.is-invalid input, .field.is-invalid textarea { border-color: #d9534f; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.consent { display: flex; gap: 12px; align-items: flex-start; font-size: 13px; color: var(--mute); margin: 4px 0 36px; cursor: pointer; line-height: 1.5; }
.consent input { accent-color: var(--ink); width: 16px; height: 16px; margin: 1px 0 0; flex: none; }
.consent.is-invalid { color: #d9534f; }
.form__foot { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.btn {
  font-size: 12px; letter-spacing: .3em; text-transform: uppercase; font-weight: 500;
  padding: 18px 44px; border: 1px solid var(--ink); color: var(--ink);
  position: relative; overflow: hidden; isolation: isolate; transition: color .5s var(--ease);
}
.btn::before { content: ""; position: absolute; inset: 0; z-index: -1; background: var(--ink); transform: scaleX(0); transform-origin: right; transition: transform .6s var(--ease); }
.btn:hover { color: var(--white); }
.btn:hover::before { transform: scaleX(1); transform-origin: left; }
.btn:disabled { opacity: .5; cursor: default; }
.form__status { margin: 0; font-size: 14px; color: var(--text); }
.form__status.is-ok { color: var(--ink); }
.form__status.is-ok::before { content: "✓ "; color: var(--orange); }

/* ==========================================================
   PIE
   ========================================================== */
.footer { border-top: 1px solid var(--line); padding: 80px var(--pad) 30px; text-align: center; }
.footer__logo { width: 150px; margin: 0 auto 70px; }
.footer__bar { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; max-width: var(--max); margin: 0 auto; padding-top: 24px; border-top: 1px solid var(--line); font-size: 12px; letter-spacing: .1em; color: var(--mute); }
.footer__bar p { margin: 0; }
.link-btn { font-size: 12px; letter-spacing: .1em; color: var(--mute); transition: color .3s; }
.link-btn:hover { color: var(--ink); }
.credits { max-width: var(--max); margin: 20px auto 0; text-align: left; font-size: 12px; color: var(--mute); line-height: 1.6; }
.credits p { margin: 0 0 4px; }
.credits a { text-decoration: underline; }

/* ==========================================================
   VISOR
   ========================================================== */
.lightbox {
  position: fixed; inset: 0; z-index: 100; background: rgba(255,255,255,.98);
  display: grid; grid-template-columns: 90px 1fr 90px; align-items: center;
  opacity: 0; transition: opacity .5s var(--ease);
}
.lightbox[hidden] { display: none; }
.lightbox.is-open { opacity: 1; }
.lightbox__figure { margin: 0; display: flex; flex-direction: column; align-items: center; min-width: 0; }
.lightbox__figure img { max-height: calc(100vh - 170px); max-width: 100%; width: auto; object-fit: contain; transition: opacity .35s; }
.lightbox__figure img.is-swapping { opacity: 0; }
.lightbox__figure figcaption { width: 100%; display: flex; justify-content: space-between; margin-top: 18px; font-size: 11px; letter-spacing: .28em; text-transform: uppercase; color: var(--mute); }
.lightbox__arrow { font-size: 22px; font-weight: 200; height: 90px; color: var(--ink); transition: color .3s; }
.lightbox__arrow:hover { color: var(--orange); }
.lightbox__close { position: absolute; top: 28px; right: var(--pad); font-size: 11px; letter-spacing: .3em; text-transform: uppercase; }
.lightbox__close:hover { color: var(--orange); }

/* ==========================================================
   RESPONSIVE
   ========================================================== */
@media (max-width: 1000px) {
  .sectors { grid-template-columns: 1fr 1fr; }
  .sector:nth-child(3) { padding-left: 0; border-left: 0; }
  .sector:nth-child(n+3) { border-top: 1px solid var(--line); }
  .about { grid-template-columns: 1fr; gap: 0; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .header { height: 72px; }
  .header.is-scrolled { height: 64px; }
  .header__logo img, .header.is-scrolled .header__logo img { height: 36px; }
  .burger { display: block; }
  .nav {
    position: fixed; inset: 0; z-index: 1;
    background: var(--white);
    flex-direction: column; align-items: center; justify-content: center; gap: 30px;
    opacity: 0; visibility: hidden; transition: opacity .5s var(--ease), visibility 0s .5s;
  }
  .menu-open .nav { opacity: 1; visibility: visible; transition: opacity .5s var(--ease); }
  .nav a { font-size: 15px; letter-spacing: .32em; }
  .menu-open .header__logo { opacity: 1; pointer-events: auto; position: relative; z-index: 2; }
  /* backdrop-filter encerraría el menú fijo dentro de la cabecera */
  .menu-open .header { backdrop-filter: none; -webkit-backdrop-filter: none; background: var(--white); }

  .hero__claim { font-size: 11px; letter-spacing: .28em; line-height: 1.8; }
  .hero__sectors { font-size: 14px; }
  .hero__sectors i { margin: 0 .3em; }

  .about__cols { grid-template-columns: 1fr; gap: 20px; }
  .sectors { grid-template-columns: 1fr; }
  .sector, .sector + .sector { padding: 30px 0 34px; border-left: 0; }
  .sector + .sector { border-top: 1px solid var(--line); }
  .sector__n { margin-bottom: 12px; }
  .scope { flex-direction: column; align-items: center; gap: 14px; }
  .scope li + li::before { display: none; }

  .gallery__grid { grid-template-columns: 1fr 1fr; }
  .shot span { opacity: 1; transform: none; padding: 30px 12px 10px; font-size: 9px; }

  .contact { grid-template-columns: 1fr; }
  .contact__data div { grid-template-columns: 1fr; gap: 2px; }

  .lightbox { grid-template-columns: 1fr; grid-template-rows: 1fr auto; padding: 70px 16px 20px; }
  .lightbox__figure { grid-row: 1; }
  .lightbox__arrow { position: absolute; bottom: 14px; height: 50px; width: 60px; }
  .lightbox__arrow--prev { left: 16px; } .lightbox__arrow--next { right: 16px; }
  .lightbox__figure figcaption { padding-bottom: 50px; }
}