/* ─────────────────────────────────────────────
   CRV Studio v3 — cinematográfico patagónico
   Paleta estricta: #0a0a0a #141414 #1f1f1f #333 #666 #999 #ccc #fff
   ───────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

:root {
  --bg:    #0a0a0a;
  --s1:    #141414;
  --s2:    #1f1f1f;
  --s3:    #333333;
  --mid:   #666666;
  --sub:   #999999;
  --light: #cccccc;
  --white: #ffffff;
  --ff-t: 'Fraunces', Georgia, serif;
  --ff-b: 'Inter', system-ui, sans-serif;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

body {
  background: var(--bg);
  color: var(--white);
  font-family: var(--ff-b);
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── PRELOADER ── */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.7s var(--ease), visibility 0.7s;
}
.preloader.hidden { opacity: 0; visibility: hidden; }
.preloader-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.6rem;
}
.pl-mtn { width: 200px; height: auto; overflow: visible; }
.pl-range {
  fill: none;
  stroke: var(--light);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
  stroke-dasharray: 520;
  stroke-dashoffset: 520;
  animation: plDraw 2.4s var(--ease) infinite;
}
.pl-base {
  fill: none;
  stroke: var(--s3);
  stroke-width: 1;
}
@keyframes plDraw {
  0%   { stroke-dashoffset: 520; opacity: 0.2; }
  45%  { stroke-dashoffset: 0;   opacity: 1; }
  75%  { stroke-dashoffset: 0;   opacity: 1; }
  100% { stroke-dashoffset: 0;   opacity: 0.2; }
}
.pl-word {
  font-family: var(--ff-t);
  font-size: 1.15rem;
  font-weight: 300;
  letter-spacing: 0.12em;
  color: var(--white);
}
.pl-word em { font-style: italic; color: var(--light); }
.pl-text {
  font-family: var(--ff-b);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--mid);
  padding-left: 0.4em;
}
.pl-dots::after {
  content: '';
  animation: plDots 1.4s steps(4, end) infinite;
}
@keyframes plDots {
  0% { content: ''; } 25% { content: '.'; } 50% { content: '..'; } 75% { content: '...'; }
}
@media (prefers-reduced-motion: reduce) {
  .pl-range { animation: none; stroke-dashoffset: 0; }
  .pl-dots::after { animation: none; content: '...'; }
}

/* ── CAPA 1: video de fondo fixed ── */
.bg-video-wrap {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: var(--bg);
}
.bg-video {
  width: 100%;
  height: 100vh;
  object-fit: cover;
  filter: grayscale(1) contrast(1.15) brightness(0.85);
  background: var(--bg);
}
.bg-vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, transparent 35%, rgba(10,10,10,0.75) 100%),
    linear-gradient(to bottom, rgba(10,10,10,0.35) 0%, transparent 25%, transparent 60%, rgba(10,10,10,0.9) 100%);
}

/* ── CAPA 2: nieve real (blend mode) — slot listo ── */
.snow-video {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  mix-blend-mode: screen;
  opacity: 0.9;
  pointer-events: none;
  z-index: 1;
}
/* Sin source no muestra nada; cuando exista el mp4, anda solo */
.snow-video:not([src]):empty { display: none; }

/* ── CAPA 4: NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.9rem 3rem;
  background: linear-gradient(to bottom, rgba(10,10,10,0.55) 0%, transparent 100%);
}
.nav-logo {
  font-family: var(--ff-t);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--white);
}
.nav-logo em { font-style: normal; color: var(--sub); font-weight: 300; }
.nav-links { display: flex; gap: 2.75rem; }
.nav-links a {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--sub);
  transition: color 0.25s;
}
.nav-links a:hover { color: var(--white); }

/* ── HERO ── */
#hero {
  position: relative;
  z-index: 10;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 1.5rem;
}
.hero-title {
  font-family: var(--ff-t);
  font-size: clamp(4rem, 12vw, 10rem);
  font-weight: 300;
  line-height: 0.95;
  letter-spacing: -0.03em;
  text-shadow: 0 4px 60px rgba(10,10,10,0.8);
}
.hero-title em { font-style: italic; color: var(--light); }
.hero-tagline {
  margin-top: 1.75rem;
  font-size: clamp(0.85rem, 1.6vw, 1.05rem);
  font-weight: 400;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--light);
  text-shadow: 0 2px 24px rgba(10,10,10,0.9);
}
.hero-cta {
  margin-top: 3rem;
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.35);
  padding: 1.1rem 2.4rem;
  background: rgba(10,10,10,0.35);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background 0.3s, border-color 0.3s;
}
.hero-cta:hover {
  background: rgba(255,255,255,0.12);
  border-color: var(--white);
}
.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
}
.scroll-track {
  width: 1px;
  height: 56px;
  background: rgba(255,255,255,0.18);
  position: relative;
  overflow: hidden;
}
.scroll-dot {
  position: absolute;
  top: -30%;
  left: 0;
  width: 100%;
  height: 30%;
  background: var(--white);
  animation: scrollHint 2.2s var(--ease) infinite;
}
@keyframes scrollHint { to { top: 105%; } }

/* ── Secciones (CAPA 3) ── */
section {
  position: relative;
  z-index: 10;
  padding: 10rem 0;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 3rem;
  position: relative;
  z-index: 2;
}
.container.narrow { max-width: 860px; }

.section-label {
  display: block;
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 4rem;
}

/* Video de fondo por sección (slots forest/storm) */
.section-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.1) brightness(0.5);
  z-index: 0;
}
.section-video:not([src]):empty { display: none; }

/* ── ESTUDIO / MANIFIESTO ── */
#estudio {
  background: linear-gradient(to bottom, transparent 0%, rgba(10,10,10,0.94) 18%, rgba(10,10,10,0.94) 100%);
}
.manifiesto {
  font-family: var(--ff-t);
  font-size: clamp(1.6rem, 3.4vw, 2.7rem);
  font-weight: 300;
  line-height: 1.35;
  letter-spacing: -0.015em;
  color: var(--white);
  margin-bottom: 2.75rem;
}
.manifiesto:last-child { margin-bottom: 0; }
.manifiesto.dim { color: var(--sub); font-style: italic; }

/* ── PROYECTOS ── */
#proyectos { background: rgba(10,10,10,0.94); }

.cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
/* Grilla asimétrica: cards impares bajan */
.card:nth-child(even) { transform: translateY(3.5rem); }

.card {
  display: block;
  background: rgba(10,10,10,0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.08);
  overflow: hidden;
  transition: transform 0.5s var(--ease), border-color 0.4s, box-shadow 0.5s;
}
.card:hover {
  transform: scale(1.02);
  border-color: rgba(255,255,255,0.35);
  box-shadow: 0 24px 80px rgba(0,0,0,0.6);
}
.card:nth-child(even):hover { transform: translateY(3.5rem) scale(1.02); }

.card-media {
  height: 230px;
  background: linear-gradient(160deg, var(--s2) 0%, var(--s1) 60%, var(--bg) 100%);
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}
.card-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10,10,10,0.5), transparent 55%);
  transition: opacity 0.4s;
}
.card:hover .card-media::after { opacity: 0.4; }
.card-media-num {
  font-family: var(--ff-t);
  font-size: 4.5rem;
  font-weight: 300;
  line-height: 1;
  color: var(--s3);
  transition: color 0.4s, transform 0.6s var(--ease);
  position: relative;
  z-index: 1;
}
.card:hover .card-media-num {
  color: var(--mid);
  transform: scale(1.08);
}

.card-body { padding: 1.9rem; }
.card-title {
  font-family: var(--ff-t);
  font-size: 1.55rem;
  font-weight: 300;
  letter-spacing: -0.015em;
  margin-bottom: 0.5rem;
}
.card-desc {
  font-size: 0.88rem;
  color: var(--sub);
  margin-bottom: 1.5rem;
}
.card-link {
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
  transition: color 0.25s;
}
.card:hover .card-link { color: var(--light); }

/* ── CONTACTO ── */
#contacto {
  background: linear-gradient(to bottom, rgba(10,10,10,0.94) 0%, rgba(10,10,10,0.7) 100%);
  text-align: left;
}
.contact-heading {
  font-family: var(--ff-t);
  font-size: clamp(2.4rem, 6vw, 5rem);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--white);
  margin-bottom: 3.5rem;
}
.contact-heading em { font-style: italic; color: var(--sub); }

.contact-form {
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-input {
  width: 100%;
  background: rgba(20,20,20,0.7);
  border: 1px solid var(--s2);
  color: var(--white);
  font-family: var(--ff-b);
  font-size: 0.9rem;
  padding: 1rem 1.2rem;
  outline: none;
  resize: none;
  transition: border-color 0.25s;
}
.form-input::placeholder { color: var(--mid); }
.form-input:focus { border-color: var(--sub); }
.form-submit {
  align-self: flex-start;
  font-family: var(--ff-b);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--white);
  border: 1px solid var(--white);
  padding: 1.05rem 2.4rem;
  cursor: pointer;
  transition: background 0.3s, color 0.3s;
}
.form-submit:hover { background: transparent; color: var(--white); }

/* ── FOOTER ── */
footer {
  position: relative;
  z-index: 10;
  background: var(--bg);
  border-top: 1px solid var(--s1);
  padding: 2rem 3rem;
  text-align: center;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
}

/* ── Reveal on scroll ── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }
.card.reveal.visible:nth-child(even) { transform: translateY(3.5rem); }

/* ── Cursor custom ── */
.cursor {
  position: fixed;
  top: 0; left: 0;
  width: 28px; height: 28px;
  border: 1px solid var(--white);
  border-radius: 50%;
  pointer-events: none;
  z-index: 999;
  mix-blend-mode: difference;
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s;
}
@media (hover: none), (max-width: 768px) {
  .cursor { display: none; }
}

/* ── prefers-reduced-motion ── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .card.reveal:nth-child(even) { transform: translateY(3.5rem); }
  .scroll-dot { animation: none; }
  .cursor { display: none; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}

/* ── Responsive ── */
@media (max-width: 900px) {
  nav { padding: 1.25rem 1.5rem; }
  .nav-links { gap: 1.5rem; }
  .container { padding: 0 1.5rem; }
  section { padding: 6.5rem 0; }
  .cards { grid-template-columns: 1fr; }
  .card:nth-child(even),
  .card:nth-child(even):hover,
  .card.reveal.visible:nth-child(even) { transform: none; }
  .card:nth-child(even):hover { transform: scale(1.02); }
  footer { padding: 1.5rem; }
  .form-row { grid-template-columns: 1fr; }
}