/* ============================================================
   ESTUDIO VÉRTICE — Hoja de estilos
   Estructura:
   1. Variables y reset
   2. Tipografía y utilidades base
   3. Navegación
   4. Hero + placeholder 3D
   5. Filosofía
   6. Proyectos
   7. Servicios
   8. Equipo
   9. Contacto
   10. Pie de página
   11. Animaciones de scroll
   12. Responsive
   ============================================================ */

/* ---------- 1. VARIABLES Y RESET ---------- */
:root {
  /* Paleta neutra */
  --color-white: #fcfbf9;
  --color-bone:  #f4f1ea;
  --color-beige: #e7e0d4;
  --color-stone: #a8a29a;
  --color-stone-dark: #6c6760;
  --color-ink:   #16140f;
  --color-ink-soft: #2a2722;

  /* Tipografía */
  --font-serif: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --font-sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Ritmo */
  --section-pad: clamp(5rem, 12vh, 11rem);
  --container: 1280px;
  --gutter: clamp(1.5rem, 5vw, 5rem);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-weight: 300;
  color: var(--color-ink);
  background: var(--color-white);
  line-height: 1.65;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ---------- 2. TIPOGRAFÍA Y UTILIDADES ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-pad); }

.section__label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--color-stone-dark);
}

.section__head { margin-bottom: clamp(2.5rem, 6vw, 4.5rem); }

.section__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -0.01em;
  margin-top: 1rem;
}

em { font-style: italic; }

/* Botones — interacción cohesiva, sobria y premium:
   (1) imán: el botón sigue ligeramente al cursor (JS, ver main.js)
   (2) relleno sólido ink-black que barre de izquierda a derecha (::before)
   (3) flecha → que aparece deslizándose (::after)
   (4) presión elástica al hacer clic (JS)
   En reposo es un botón con contorno y texto ink; al hover el relleno ink
   lo cubre por completo (100% opaco, sin lavados) y el texto pasa a claro. */
.btn {
  position: relative;
  overflow: hidden;
  isolation: isolate; /* contexto de apilamiento para el relleno */
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 1.15rem 2.4rem;
  color: var(--color-ink);
  background: transparent;
  border: 1px solid var(--color-ink);
  cursor: pointer;
  /* El transform lo gobierna JS (imán + presión); aquí solo color y borde. */
  transition: color 0.35s var(--ease), border-color 0.35s var(--ease);
}
/* (2) Relleno sólido ink, barre de izquierda a derecha (~0.38s) */
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1; /* detrás del texto, sobre el fondo del botón */
  background: var(--color-ink);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.38s var(--ease);
}
/* Estado "activado" del relleno y el texto: foco de teclado, :active (clic o
   TAP) y .is-pressing (presión sostenida vía JS en táctil). Así el toque en
   móvil muestra el relleno y la flecha sin depender del hover. */
.btn:focus-visible::before,
.btn:active::before,
.btn.is-pressing::before { transform: scaleX(1); }
.btn:focus-visible,
.btn:active,
.btn.is-pressing { color: var(--color-white); }
/* (3) Flecha: espacio reservado (sin saltos de layout); aparece y se desliza */
.btn::after {
  content: "\2192";
  display: inline-block;
  margin-left: 0.55em;
  opacity: 0;
  transform: translateX(-0.4em);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease);
}
.btn:focus-visible::after,
.btn:active::after,
.btn.is-pressing::after {
  opacity: 1;
  transform: translateX(0);
}

/* Hover solo en dispositivos con cursor real: evita el "hover pegajoso" en
   pantallas táctiles y deja el desktop exactamente igual que antes. */
@media (hover: hover) and (pointer: fine) {
  .btn:hover::before { transform: scaleX(1); }
  .btn:hover { color: var(--color-white); }
  .btn:hover::after { opacity: 1; transform: translateX(0); }
}

/* Táctil / pantallas sin cursor: objetivo de toque cómodo (>= ~44px). */
@media (hover: none), (pointer: coarse) {
  .btn { min-height: 48px; }
}

/* .btn--primary usa el estilo base (clase presente en el HTML del hero). */
.btn--dark {
  width: 100%;
}

/* ---------- 3. NAVEGACIÓN ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background 0.5s var(--ease), padding 0.5s var(--ease), box-shadow 0.5s var(--ease);
  padding-block: 1.6rem;
}
.site-header.is-scrolled {
  background: rgba(252, 251, 249, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding-block: 1rem;
  box-shadow: 0 1px 0 rgba(22, 20, 15, 0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: clamp(1.5rem, 3vw, 2.75rem);
}
.nav__menu a {
  position: relative;
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  padding-block: 0.25rem;
}
.nav__menu a:not(.nav__cta)::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--color-ink);
  transition: width 0.4s var(--ease);
}
.nav__menu a:not(.nav__cta):hover::after { width: 100%; }

.nav__cta {
  border: 1px solid var(--color-ink);
  padding: 0.55rem 1.3rem !important;
  transition: background 0.4s var(--ease), color 0.4s var(--ease),
    transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.nav__cta:hover {
  background: var(--color-ink);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 10px 22px -12px rgba(22, 20, 15, 0.4);
}
.nav__cta:active { transform: translateY(0); transition-duration: 0.12s; }

/* Botón hamburguesa */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  z-index: 110;
}
.nav__toggle span {
  width: 26px; height: 1.5px;
  background: var(--color-ink);
  transition: transform 0.4s var(--ease), opacity 0.3s var(--ease);
}
.nav__toggle.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle.is-open span:nth-child(2) { opacity: 0; }
.nav__toggle.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- 4. HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(180deg, var(--color-bone) 0%, var(--color-white) 100%);
}

/* Contenedor de la escena 3D (Three.js) */
.hero__scene {
  position: absolute;
  inset: 0;
  z-index: 1;
}
/* Lienzo WebGL: ocupa todo el contenedor y aparece con un fundido suave */
.hero__scene canvas {
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.4s var(--ease);
}
.hero__scene.is-active canvas { opacity: 1; }
/* En móvil la escena queda como telón de fondo muy sutil tras el texto */
@media (max-width: 720px) {
  .hero__scene.is-active canvas { opacity: 0.32; }
}
/* Cuando la escena 3D arranca, se oculta el respaldo estático */
.hero__scene.is-active .scene-placeholder {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.8s var(--ease), visibility 0.8s var(--ease);
}
.scene-placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.scene-placeholder__frame {
  position: absolute;
  right: clamp(-6rem, -4vw, -2rem);
  top: 50%;
  width: clamp(320px, 42vw, 640px);
  aspect-ratio: 1 / 1.15;
  transform: translateY(-50%) rotate(45deg);
  border: 1px solid rgba(22, 20, 15, 0.12);
  background:
    linear-gradient(135deg, rgba(231, 224, 212, 0.55), rgba(252, 251, 249, 0));
  animation: floatScene 14s var(--ease) infinite alternate;
}
.scene-placeholder__frame::after {
  content: "";
  position: absolute;
  inset: 14%;
  border: 1px solid rgba(22, 20, 15, 0.08);
}
.scene-placeholder__label {
  position: absolute;
  right: clamp(1.5rem, 5vw, 5rem);
  bottom: clamp(1.5rem, 5vw, 5rem);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-stone);
}

@keyframes floatScene {
  from { transform: translateY(-52%) rotate(42deg); }
  to   { transform: translateY(-48%) rotate(48deg); }
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 880px;
}
.hero__eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--color-stone-dark);
  margin-bottom: 1.75rem;
}
.hero__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(3rem, 9vw, 7.5rem);
  line-height: 0.98;
  letter-spacing: -0.015em;
}
.hero__title .line { display: block; }
.hero__title em { color: var(--color-stone-dark); }

.hero__lead {
  max-width: 30rem;
  margin: 2rem 0 2.75rem;
  font-size: clamp(1rem, 1.4vw, 1.18rem);
  color: var(--color-ink-soft);
}

.hero__scroll {
  position: absolute;
  left: var(--gutter);
  bottom: 2.5rem;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-stone-dark);
}
.hero__scroll-line {
  width: 60px; height: 1px;
  background: var(--color-stone-dark);
  transform-origin: left;
  animation: scrollLine 2.4s var(--ease) infinite;
}
@keyframes scrollLine {
  0%, 100% { transform: scaleX(0.3); opacity: 0.5; }
  50%      { transform: scaleX(1);   opacity: 1; }
}

/* ---------- 5. FILOSOFÍA ---------- */
.philosophy { background: var(--color-white); }
.philosophy__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2.2fr);
  gap: clamp(2rem, 6vw, 6rem);
}
.philosophy__statement {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(1.8rem, 3.6vw, 3rem);
  line-height: 1.22;
  letter-spacing: -0.005em;
  margin-bottom: 2.5rem;
}
.philosophy__statement em { color: var(--color-stone-dark); }
.philosophy__text {
  max-width: 36rem;
  color: var(--color-ink-soft);
  font-size: 1.02rem;
}
.philosophy__text + .philosophy__text { margin-top: 1.25rem; }

/* ---------- 6. PROYECTOS ---------- */
.projects { background: var(--color-bone); }
.projects__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2.5vw, 2.25rem);
}
.project {
  cursor: pointer;
  /* La tarjeta se eleva con suavidad al pasar el cursor */
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
/* .project duplicada: misma razón que en .btn, gana a `.reveal.is-visible`. */
.project.project:hover {
  transform: translateY(-6px);
  box-shadow: 0 28px 55px -30px rgba(22, 20, 15, 0.45);
}
.project__media {
  position: relative;
  aspect-ratio: 4 / 5;
  /* Tono neutro visible mientras la imagen carga */
  background: linear-gradient(160deg, var(--color-beige), var(--color-stone));
  overflow: hidden;
}
/* Imagen real del proyecto */
.project__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* Zoom suave y elegante al pasar el cursor */
  transition: transform 0.9s var(--ease), filter 0.6s var(--ease);
  will-change: transform;
}
.project:hover .project__media img {
  transform: scale(1.06);
  filter: brightness(0.97);
}
/* Degradado inferior para legibilidad del índice */
.project__media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(to top, rgba(22, 20, 15, 0.42), rgba(22, 20, 15, 0) 42%);
  opacity: 0.7;
  transition: opacity 0.6s var(--ease);
  pointer-events: none;
}
.project:hover .project__media::after { opacity: 0.9; }
.project__index {
  position: absolute;
  left: 1.1rem;
  bottom: 0.85rem;
  z-index: 2;
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-white);
  pointer-events: none;
}

.project__info {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding-top: 1.1rem;
}
.project__name {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.4rem;
  letter-spacing: -0.005em;
}
.project__meta {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--color-stone-dark);
  text-align: right;
  flex-shrink: 0;
}

/* ---------- 7. SERVICIOS ---------- */
.services { background: var(--color-white); }
.services__list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid rgba(22, 20, 15, 0.12);
}
.service {
  padding: clamp(2rem, 4vw, 3.5rem) clamp(1rem, 3vw, 3rem);
  border-bottom: 1px solid rgba(22, 20, 15, 0.12);
  position: relative;
  transition: background 0.5s var(--ease);
}
.service:nth-child(odd)  { border-right: 1px solid rgba(22, 20, 15, 0.12); }
.service:hover { background: var(--color-bone); }
.service__num {
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--color-stone);
}
.service__name {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  margin: 1rem 0 0.9rem;
}
.service__text {
  max-width: 30rem;
  color: var(--color-ink-soft);
  font-size: 0.98rem;
}

/* ---------- 8. EQUIPO ---------- */
.team { background: var(--color-ink); color: var(--color-bone); }
.team .section__label { color: var(--color-stone); }
.team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: clamp(2rem, 6vw, 6rem);
}
.team__intro .section__title { color: var(--color-white); }
.team__text {
  color: rgba(244, 241, 234, 0.78);
  font-size: 1.05rem;
}
.team__text + .team__text { margin-top: 1.25rem; }

.team__stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(2rem, 5vw, 4rem);
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(244, 241, 234, 0.16);
}
.stat { display: flex; flex-direction: column; }
.stat__num {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 4vw, 3.4rem);
  font-weight: 500;
  color: var(--color-white);
  line-height: 1;
}
.stat__label {
  margin-top: 0.6rem;
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-stone);
}

/* ---------- 9. CONTACTO ---------- */
.contact { background: var(--color-bone); }
.contact__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(2.5rem, 6vw, 6rem);
  align-items: start;
}
.contact__title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.05;
  margin: 1rem 0 2.5rem;
}
.contact__title em { color: var(--color-stone-dark); }

.contact__details li {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-block: 1.1rem;
  border-top: 1px solid rgba(22, 20, 15, 0.12);
}
.contact__details li:last-child { border-bottom: 1px solid rgba(22, 20, 15, 0.12); }
.contact__key {
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-stone-dark);
}
.contact__details a:hover { color: var(--color-stone-dark); }

/* Formulario */
.contact__form { display: flex; flex-direction: column; gap: 1.5rem; }
.field { display: flex; flex-direction: column; gap: 0.5rem; }
.field label {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-stone-dark);
}
.field input,
.field textarea {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 300;
  color: var(--color-ink);
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(22, 20, 15, 0.25);
  padding: 0.75rem 0;
  transition: border-color 0.4s var(--ease);
  resize: vertical;
}
.field input::placeholder,
.field textarea::placeholder { color: var(--color-stone); }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--color-ink);
}
.form__status {
  font-size: 0.85rem;
  color: var(--color-stone-dark);
  min-height: 1.2em;
}
.form__status.is-success { color: #3c6e47; }
.form__status.is-error   { color: #9c4a3c; }

/* ---------- 10. PIE ---------- */
.footer {
  background: var(--color-ink);
  color: var(--color-bone);
  padding-block: 2.5rem;
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.footer__brand {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
}
.footer__copy {
  font-size: 0.78rem;
  color: var(--color-stone);
  letter-spacing: 0.03em;
}
.footer__top {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--color-bone);
  transition: color 0.4s var(--ease);
}
.footer__top:hover { color: var(--color-stone); }

/* ---------- 11. ANIMACIONES DE SCROLL ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1s var(--ease), transform 1s var(--ease);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
/* Escalonado suave entre elementos hermanos */
.reveal.is-visible { transition-delay: var(--reveal-delay, 0s); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
  /* Sin movimiento en las microinteracciones: la retroalimentación queda
     en color/sombra, sin desplazamientos ni escalados. */
  .btn.btn:hover, .btn.btn:active,
  .nav__cta:hover, .nav__cta:active,
  .project.project:hover { transform: none; }
  .project:hover .project__media img { transform: none; }
}

/* ---------- 12. RESPONSIVE ---------- */
@media (max-width: 900px) {
  .philosophy__grid,
  .team__grid,
  .contact__grid { grid-template-columns: 1fr; }

  .projects__grid { grid-template-columns: repeat(2, 1fr); }

  .scene-placeholder__frame { opacity: 0.7; }
}

@media (max-width: 720px) {
  /* Navegación móvil */
  .nav__toggle { display: flex; }
  .nav__menu {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    background: var(--color-white);
    transform: translateX(100%);
    transition: transform 0.55s var(--ease);
  }
  .nav__menu.is-open { transform: translateX(0); }
  .nav__menu a { font-size: 1.5rem; font-family: var(--font-serif); }
  .nav__cta { border: none; padding: 0 !important; }

  .projects__grid { grid-template-columns: 1fr; }
  .services__list { grid-template-columns: 1fr; }
  .service:nth-child(odd) { border-right: none; }

  .hero__scroll { display: none; }
  .scene-placeholder__frame { width: 80vw; right: -20vw; }
}