/* ============================================
   FOCAL ESTUDIO — CSS Principal
   Fotografía gastronómica · Rosario, Argentina
   ============================================ */

/* ----------------------------------------
   VARIABLES & TOKENS
   ---------------------------------------- */
:root {
  /* Colores */
  --color-bg:         #0a0a0a;
  --color-bg-2:       #111111;
  --color-bg-3:       #1a1a1a;
  --color-accent:     #c4714a;
  --color-accent-dim: #a05a38;
  --color-text:       #f5f0e8;
  --color-text-muted: #9e9890;
  --color-border:     #2a2a2a;
  --color-border-mid: #333333;

  /* Tipografía */
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-mono:  'Space Mono', 'Courier New', monospace;

  /* Tamaños */
  --fs-xs:   0.6875rem;   /* 11px */
  --fs-sm:   0.75rem;     /* 12px */
  --fs-base: 0.875rem;    /* 14px */
  --fs-md:   1rem;        /* 16px */
  --fs-lg:   1.125rem;    /* 18px */
  --fs-xl:   1.5rem;      /* 24px */
  --fs-2xl:  2rem;        /* 32px */
  --fs-3xl:  2.75rem;     /* 44px */
  --fs-4xl:  3.75rem;     /* 60px */
  --fs-5xl:  5rem;        /* 80px */

  /* Espaciado */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2rem;
  --space-xl:  3rem;
  --space-2xl: 5rem;
  --space-3xl: 8rem;

  /* Layout */
  --max-width:     1280px;
  --padding-x:     2rem;
  --nav-height:    72px;

  /* Transiciones */
  --transition-fast:   0.2s ease;
  --transition-base:   0.35s ease;
  --transition-slow:   0.6s ease;
}

/* ----------------------------------------
   BASE & BODY
   ---------------------------------------- */
body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  line-height: 1.7;
}

/* Noise texture CSS puro */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image:
    url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
}

/* ----------------------------------------
   LAYOUT UTILITIES
   ---------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--padding-x);
}

.section-padding {
  padding-block: var(--space-3xl);
}

/* ----------------------------------------
   TIPOGRAFÍA — COMPONENTES
   ---------------------------------------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.eyebrow::before {
  content: '— ';
}

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(var(--fs-3xl), 6vw, var(--fs-5xl)); }
h2 { font-size: clamp(var(--fs-2xl), 4vw, var(--fs-4xl)); }
h3 { font-size: clamp(var(--fs-xl), 2.5vw, var(--fs-2xl)); }

em {
  font-style: italic;
  color: var(--color-accent);
}

/* ----------------------------------------
   BOTONES
   ---------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 0.85em 1.75em;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-text);
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn-primary:hover::after {
  opacity: 1;
}

.btn-ghost {
  border: 1px solid rgba(245, 240, 232, 0.4);
  color: var(--color-text);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ----------------------------------------
   BARRA DE PROGRESO DE SCROLL
   ---------------------------------------- */
#scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--color-accent);
  z-index: 1000;
  transition: width 0.1s linear;
}

/* ----------------------------------------
   NAVEGACIÓN
   ---------------------------------------- */
.nav {
  position: fixed;
  top: 2px; /* deja visible la barra de progreso */
  left: 0;
  right: 0;
  z-index: 900;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), background var(--transition-base);
}

.nav.scrolled {
  border-bottom-color: rgba(196, 113, 74, 0.2);
  background: rgba(10, 10, 10, 0.95);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav__logo {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 400;
  line-height: 1;
}

.nav__logo span {
  color: var(--color-text-muted);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__link {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition-base);
}

.nav__link:hover {
  color: var(--color-text);
}

.nav__link:hover::after {
  width: 100%;
}

/* Hamburguesa */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
}

.nav__hamburger span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--color-text);
  transition: all var(--transition-base);
  transform-origin: center;
}

.nav__hamburger.active span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav__hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__hamburger.active span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* Mobile menu */
.nav__mobile {
  display: none;
  position: fixed;
  top: calc(var(--nav-height) + 2px);
  left: 0;
  right: 0;
  background: rgba(10, 10, 10, 0.98);
  backdrop-filter: blur(12px);
  padding: var(--space-xl) var(--padding-x);
  border-bottom: 1px solid var(--color-border);
  transform: translateY(-110%);
  transition: transform var(--transition-base);
  z-index: 890;
}

.nav__mobile.open {
  transform: translateY(0);
}

.nav__mobile-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.nav__mobile-link {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  padding-block: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.nav__mobile-link:hover {
  color: var(--color-accent);
}

/* ----------------------------------------
   HERO
   ---------------------------------------- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url('../img/hero.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.05);
  transition: transform 8s ease;
}

.hero.loaded .hero__bg {
  transform: scale(1);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(10, 10, 10, 0.95) 0%,
    rgba(10, 10, 10, 0.6) 40%,
    rgba(10, 10, 10, 0.2) 70%,
    rgba(10, 10, 10, 0.1) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  padding-block: var(--space-3xl);
  max-width: 700px;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.hero__title {
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.hero__subtitle {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  text-transform: uppercase;
}

.hero__cta {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* ----------------------------------------
   SOBRE NOSOTROS
   ---------------------------------------- */
.about {
  background: var(--color-bg-2);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about__content h2 {
  margin-bottom: var(--space-lg);
}

.about__text {
  color: var(--color-text-muted);
  line-height: 1.85;
  margin-bottom: var(--space-xl);
  font-size: var(--fs-base);
}

.about__stats {
  display: flex;
  gap: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.stat__number {
  font-family: var(--font-serif);
  font-size: var(--fs-3xl);
  color: var(--color-accent);
  line-height: 1;
  display: block;
}

.stat__label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
  display: block;
}

.about__image-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 4;
}

.about__image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.about__image-wrap:hover img {
  transform: scale(1.04);
}

/* ----------------------------------------
   SERVICIOS
   ---------------------------------------- */
.services {
  background: var(--color-bg);
}

.services__header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: end;
  margin-bottom: var(--space-3xl);
}

.services__header-desc {
  color: var(--color-text-muted);
  font-size: var(--fs-base);
  line-height: 1.85;
}

.services__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.service-card {
  padding: var(--space-xl) var(--space-xl);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
  transition: background var(--transition-base);
}

.service-card:hover {
  background: rgba(196, 113, 74, 0.04);
}

.service-card__num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  display: block;
}

.service-card__title {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.service-card__desc {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
  line-height: 1.85;
}

.service-card__line {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.5s ease;
}

.service-card:hover .service-card__line {
  width: 100%;
}

/* ----------------------------------------
   PORTFOLIO
   ---------------------------------------- */
.portfolio {
  background: var(--color-bg-2);
}

.portfolio__header {
  margin-bottom: var(--space-2xl);
}

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto;
  gap: 2px;
}

/* Variaciones de tamaño para ritmo visual */
.portfolio-item:nth-child(1) {
  grid-column: span 2;
  grid-row: span 2;
}

.portfolio-item:nth-child(3) {
  grid-column: span 2;
}

.portfolio-item:nth-child(5) {
  grid-column: span 2;
}

.portfolio-item:nth-child(7) {
  grid-column: span 2;
}

.portfolio-item {
  position: relative;
  overflow: hidden;
  aspect-ratio: 1 / 1;
  cursor: pointer;
  background: var(--color-bg-3);
}

.portfolio-item:nth-child(1) {
  aspect-ratio: auto;
}

.portfolio-item__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s ease;
}

.portfolio-item:hover .portfolio-item__img {
  transform: scale(1.06);
}

.portfolio-item__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(10, 10, 10, 0.92) 0%,
    rgba(10, 10, 10, 0.4) 50%,
    rgba(10, 10, 10, 0) 100%
  );
  opacity: 0;
  transition: opacity var(--transition-base);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--space-md);
}

.portfolio-item:hover .portfolio-item__overlay {
  opacity: 1;
}

.portfolio-item__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  transform: translateY(8px);
  transition: transform var(--transition-base);
}

.portfolio-item:hover .portfolio-item__tag {
  transform: translateY(0);
}

.portfolio-item__title {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  color: var(--color-text);
  transform: translateY(10px);
  transition: transform var(--transition-base) 0.05s;
}

.portfolio-item:hover .portfolio-item__title {
  transform: translateY(0);
}

.portfolio-item__desc {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  transform: translateY(10px);
  transition: transform var(--transition-base) 0.1s;
}

.portfolio-item:hover .portfolio-item__desc {
  transform: translateY(0);
}

/* ----------------------------------------
   LIGHTBOX
   ---------------------------------------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(5, 5, 5, 0.97);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.lightbox.active {
  opacity: 1;
  pointer-events: all;
}

.lightbox__inner {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  display: block;
}

.lightbox__caption {
  margin-top: var(--space-md);
  text-align: center;
}

.lightbox__caption-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
}

.lightbox__caption-title {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  color: var(--color-text);
  display: block;
}

.lightbox__caption-desc {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  display: block;
}

.lightbox__close {
  position: absolute;
  top: -3rem;
  right: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
  background: none;
  border: none;
}

.lightbox__close:hover {
  color: var(--color-accent);
}

.lightbox__prev,
.lightbox__next {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--space-lg);
  transition: color var(--transition-fast);
}

.lightbox__prev { left: var(--space-lg); }
.lightbox__next { right: var(--space-lg); }

.lightbox__prev:hover,
.lightbox__next:hover {
  color: var(--color-accent);
}

/* ----------------------------------------
   MARCAS
   ---------------------------------------- */
.brands {
  background: var(--color-bg-3);
}

.brands__header {
  margin-bottom: var(--space-2xl);
}

.brands__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--color-border);
}

.brand-card {
  padding: var(--space-xl) var(--space-lg);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  transition: background var(--transition-base);
}

.brand-card:last-child {
  border-right: none;
}

.brand-card:hover {
  background: rgba(196, 113, 74, 0.04);
}

.brand-card__accent {
  width: 2px;
  background: var(--color-accent);
  flex-shrink: 0;
  align-self: stretch;
  min-height: 40px;
}

.brand-card__name {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  color: var(--color-text);
  display: block;
  margin-bottom: 0.25rem;
}

.brand-card__type {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  display: block;
}

/* ----------------------------------------
   PROCESO
   ---------------------------------------- */
.process {
  background: var(--color-bg);
}

.process__header {
  margin-bottom: var(--space-3xl);
}

.process__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.process__grid::before {
  content: '';
  position: absolute;
  top: 1.2rem;
  left: 12%;
  right: 12%;
  height: 1px;
  background: var(--color-border);
  z-index: 0;
}

.process-step {
  padding: 0 var(--space-lg);
  position: relative;
  z-index: 1;
}

.process-step:first-child {
  padding-left: 0;
}

.process-step__num {
  font-family: var(--font-serif);
  font-size: var(--fs-4xl);
  color: var(--color-border-mid);
  line-height: 1;
  display: block;
  margin-bottom: var(--space-md);
  transition: color var(--transition-base);
}

.process-step:hover .process-step__num {
  color: var(--color-accent);
}

.process-step__title {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.process-step__desc {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  line-height: 1.85;
}

/* ----------------------------------------
   CONTACTO
   ---------------------------------------- */
.contact {
  background: var(--color-bg-2);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact__info h2 {
  margin-bottom: var(--space-md);
}

.contact__text {
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  line-height: 1.85;
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.contact__link {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}

.contact__link:hover {
  color: var(--color-accent);
}

.contact__link-bar {
  width: 2px;
  height: 2.5rem;
  background: var(--color-accent);
  flex-shrink: 0;
}

.contact__link-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  display: block;
  margin-bottom: 0.1rem;
}

.contact__link-value {
  font-family: var(--font-serif);
  font-size: var(--fs-xl);
}

.contact__link-value--mono {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  color: var(--color-text);
}

/* Formulario */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-label {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.form-input,
.form-textarea {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  padding: 0.875rem var(--space-sm);
  transition: border-color var(--transition-fast), background var(--transition-fast);
  width: 100%;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-accent);
  background: rgba(196, 113, 74, 0.05);
  outline: none;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: rgba(158, 152, 144, 0.5);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-submit {
  align-self: flex-start;
  margin-top: var(--space-xs);
}

/* ----------------------------------------
   FOOTER
   ---------------------------------------- */
.footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-xl);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-lg);
}

.footer__logo {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.footer__logo span {
  color: var(--color-text-muted);
}

.footer__copy {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  text-align: center;
}

.footer__social {
  display: flex;
  gap: var(--space-lg);
  justify-content: flex-end;
  align-items: center;
}

.footer__social-link {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer__social-link:hover {
  color: var(--color-accent);
}

/* ----------------------------------------
   ANIMACIONES ENTRADA (Intersection Observer)
   ---------------------------------------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }
.fade-up-delay-4 { transition-delay: 0.4s; }

/* ----------------------------------------
   RESPONSIVE — TABLET (≤ 768px)
   ---------------------------------------- */
@media (max-width: 768px) {
  :root {
    --padding-x: 1.25rem;
    --space-3xl: 5rem;
  }

  /* Nav */
  .nav__links {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .nav__mobile {
    display: block;
  }

  /* Hero */
  .hero__content {
    padding-bottom: var(--space-2xl);
  }

  /* About */
  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .about__image-wrap {
    aspect-ratio: 4 / 3;
    order: -1;
  }

  .about__stats {
    gap: var(--space-lg);
  }

  /* Servicios */
  .services__header {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  /* Portfolio */
  .portfolio__grid {
    grid-template-columns: 1fr 1fr;
  }

  .portfolio-item:nth-child(1) {
    grid-column: span 2;
    grid-row: span 1;
  }

  .portfolio-item:nth-child(3),
  .portfolio-item:nth-child(5),
  .portfolio-item:nth-child(7) {
    grid-column: span 1;
  }

  /* Marcas */
  .brands__grid {
    grid-template-columns: 1fr 1fr;
  }

  .brand-card:nth-child(2) {
    border-right: none;
  }

  /* Proceso */
  .process__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }

  .process__grid::before {
    display: none;
  }

  /* Contacto */
  .contact__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  /* Footer */
  .footer__inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-md);
  }

  .footer__social {
    justify-content: center;
  }
}

/* ----------------------------------------
   RESPONSIVE — MOBILE (≤ 480px)
   ---------------------------------------- */
@media (max-width: 480px) {
  :root {
    --padding-x: 1rem;
    --space-3xl: 4rem;
  }

  .hero__cta {
    flex-direction: column;
  }

  .hero__cta .btn {
    width: 100%;
    justify-content: center;
  }

  .about__stats {
    flex-direction: column;
    gap: var(--space-md);
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .service-card {
    padding: var(--space-lg) var(--space-md);
  }

  .portfolio__grid {
    grid-template-columns: 1fr 1fr;
    gap: 1px;
  }

  .brands__grid {
    grid-template-columns: 1fr;
  }

  .brand-card {
    border-right: 1px solid var(--color-border);
  }

  .process__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .lightbox__prev { left: 0.5rem; }
  .lightbox__next { right: 0.5rem; }
}