/* ==========================================================
   ESTUDIO VERTICAL MADRID · Arquitectura & Diseño
   Monochrome Architectural | Steel Blue | Perspective 3D
   ========================================================== */

:root {
  --color-bg: #0d0d17;
  --color-surface: #141420;
  --color-surface-light: #1c1c2e;
  --color-primary: #4a7c9e;
  --color-primary-dark: #3a6682;
  --color-primary-glow: rgba(74, 124, 158, 0.15);
  --color-accent: #8ab4d0;
  --color-text: #e8e8ee;
  --color-text-muted: #7a7a8a;
  --color-glass-bg: rgba(20, 20, 32, 0.7);
  --color-glass-border: rgba(74, 124, 158, 0.08);
  --color-glass-shadow: rgba(0, 0, 0, 0.4);
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;
  --wa-number: "573204445566";
  --font-display: 'Syne', 'Impact', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Noto Color Emoji';
  --font-body: 'Inter', system-ui, -apple-system, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Noto Color Emoji';
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-body); background: var(--color-bg); color: var(--color-text); line-height: 1.7; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section--dark { background: var(--color-surface); }
.section--cta { text-align: center; background: linear-gradient(135deg, #0d0d17 0%, #141420 50%, #0d0d17 100%); border-top: 1px solid rgba(74,124,158,0.06); border-bottom: 1px solid rgba(74,124,158,0.06); }
.text-accent { color: var(--color-primary); }

.section__header { text-align: center; margin-bottom: 48px; }
.section__tag {
  display: inline-block; font-size: 0.65rem; font-weight: 500;
  letter-spacing: 5px; text-transform: uppercase;
  color: var(--color-primary); margin-bottom: 14px;
  border: 1px solid rgba(74,124,158,0.12);
  padding: 5px 20px; border-radius: 50px;
}
.section__title {
  font-family: var(--font-display); font-size: 2rem;
  font-weight: 700; line-height: 1.2; margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.section__desc {
  color: var(--color-text-muted); font-size: 1rem;
  max-width: 560px; margin: 0 auto; line-height: 1.7;
}
.section__cta { text-align: center; margin-top: 44px; }

/* ===== BOTONES ===== */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 32px; border-radius: 4px;
  font-family: var(--font-body); font-size: 0.85rem;
  font-weight: 500; cursor: pointer; transition: var(--transition);
  border: 1px solid transparent; letter-spacing: 0.5px;
}
.btn--primary { background: var(--color-primary); color: var(--color-bg); border-color: var(--color-primary); }
.btn--primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(74,124,158,0.2); }
.btn--ghost { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn--ghost:hover { background: rgba(74,124,158,0.06); transform: translateY(-2px); }
.btn--large { padding: 18px 44px; font-size: 0.95rem; }

/* ===== HEADER ===== */
.header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(13, 13, 23, 0.85); backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(74,124,158,0.05);
  transition: var(--transition);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; }
.header__logo { display: flex; align-items: center; gap: 6px; color: var(--color-text); }
.logo__icon { color: var(--color-primary); margin-right: 8px; flex-shrink: 0; transition: transform 0.3s ease; }
a:hover .logo__icon { transform: scale(1.1) rotate(-5deg); }
.header__logo-text { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; letter-spacing: 4px; text-transform: uppercase; }
.header__logo-accent { color: var(--color-primary); font-family: var(--font-display); font-size: 1.1rem; font-weight: 500; letter-spacing: 2px; }

.nav-toggle { display: flex; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; z-index: 1001; }
.nav-toggle span { display: block; width: 26px; height: 1.5px; background: var(--color-text); border-radius: 1px; transition: var(--transition); }
.nav-toggle--active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle--active span:nth-child(2) { opacity: 0; }
.nav-toggle--active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.nav { position: fixed; top: 0; right: -100%; width: 75%; max-width: 320px; height: 100vh; background: rgba(13,13,23,0.98); backdrop-filter: blur(30px); display: flex; align-items: center; justify-content: center; transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1); z-index: 999; border-left: 1px solid rgba(74,124,158,0.06); }
.nav--open { right: 0; }
.nav__list { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.nav__link { display: block; padding: 14px 44px; font-size: 0.95rem; font-weight: 400; color: var(--color-text-muted); transition: var(--transition); text-align: center; letter-spacing: 1px; }
.nav__link:hover { color: var(--color-primary); }
.nav__link--active { color: var(--color-primary); font-weight: 500; border: 1px solid rgba(74,124,158,0.1); border-radius: 4px; }

/* ===== HERO · PERSPECTIVE 3D ===== */
.hero {
  position: relative; height: 100vh; min-height: 600px;
  overflow: hidden; display: flex; align-items: center;
  perspective: 1200px;
}
.hero__bg {
  position: absolute; inset: 0; z-index: 0;
  transform-origin: center center;
  transition: transform 0.1s ease-out;
}
.hero__img { width: 100%; height: 100%; object-fit: cover; }
.hero__overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(13,13,23,0.75) 0%, rgba(13,13,23,0.45) 50%, rgba(13,13,23,0.85) 100%);
}
.hero__content {
  position: relative; z-index: 2;
  text-align: center; max-width: 700px; margin: 0 auto;
  padding: 100px 20px 60px;
  transform-style: preserve-3d;
  transition: transform 0.1s ease-out;
}
.hero__tag { font-size: 0.7rem; font-weight: 400; letter-spacing: 6px; text-transform: uppercase; color: var(--color-primary); margin-bottom: 20px; display: block; }
.hero__title { font-family: var(--font-display); font-size: 3.2rem; font-weight: 700; line-height: 1.1; margin-bottom: 4px; }
.hero__title-line { display: block; }
.hero__title-line--main { color: var(--color-text); letter-spacing: 3px; }
.hero__title-line--sub { color: var(--color-primary); font-size: 1.6rem; font-weight: 500; letter-spacing: 8px; text-transform: uppercase; margin-top: 4px; }
.hero__desc { color: var(--color-text-muted); font-size: 1rem; margin-top: 24px; margin-bottom: 36px; max-width: 480px; margin-left: auto; margin-right: auto; line-height: 1.7; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

.scroll-indicator { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 8px; z-index: 2; }
.scroll-indicator__text { font-size: 0.6rem; letter-spacing: 4px; text-transform: uppercase; color: var(--color-text-muted); }
.scroll-indicator__line { width: 1px; height: 40px; background: linear-gradient(var(--color-primary), transparent); animation: scrollPulse 2s ease-in-out infinite; }
@keyframes scrollPulse { 0%, 100% { opacity: 0.3; transform: scaleY(1); } 50% { opacity: 1; transform: scaleY(1.2); } }

/* ===== ABOUT ===== */
.about { display: grid; gap: 40px; align-items: center; }
.about__img { border-radius: var(--radius-md); overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.about__img img { width: 100%; height: 320px; object-fit: cover; transition: transform 0.6s ease; filter: grayscale(0.3); }
.about__img:hover img { transform: scale(1.03); filter: grayscale(0); }
.about__texts { }
.about__text { color: var(--color-text-muted); margin-bottom: 14px; line-height: 1.8; font-size: 0.95rem; }
.about__stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 28px; }
.stat { text-align: center; padding: 18px 8px; background: var(--color-surface); border-radius: var(--radius-sm); border: 1px solid rgba(74,124,158,0.04); }
.stat__num { display: block; font-family: var(--font-display); font-size: 2rem; font-weight: 700; color: var(--color-primary); line-height: 1; letter-spacing: 2px; }
.stat__label { font-size: 0.7rem; color: var(--color-text-muted); margin-top: 6px; display: block; text-transform: uppercase; letter-spacing: 2px; }

/* ===== SERVICE CARDS ===== */
.glass { background: var(--color-glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--color-glass-border); border-radius: var(--radius-sm); }
.srv-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.srv-card { padding: 32px 24px; text-align: center; transition: var(--transition); }
.srv-card:hover { transform: translateY(-4px); border-color: rgba(74,124,158,0.12); }
.srv-card__icon { color: var(--color-primary); margin-bottom: 16px; }
.srv-card h3 { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; letter-spacing: 1px; }
.srv-card p { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.7; }

/* ===== PROYECT CARDS ===== */
.proj-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
.proj-card { position: relative; border-radius: var(--radius-md); overflow: hidden; cursor: pointer; aspect-ratio: 16/10; box-shadow: 0 8px 30px rgba(0,0,0,0.2); transition: var(--transition); }
.proj-card img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; filter: grayscale(0.4); }
.proj-card:hover { box-shadow: 0 16px 50px rgba(0,0,0,0.3); }
.proj-card:hover img { transform: scale(1.05); filter: grayscale(0); }
.proj-card__info { position: absolute; bottom: 0; left: 0; right: 0; padding: 20px; background: linear-gradient(transparent, rgba(13,13,23,0.85)); }
.proj-card__cat { font-size: 0.65rem; letter-spacing: 4px; text-transform: uppercase; color: var(--color-primary); display: block; margin-bottom: 4px; }
.proj-card__info h3 { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--color-text); }

/* ===== TESTIMONIOS ===== */
.test-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.test-card { padding: 28px 24px; transition: var(--transition); }
.test-card:hover { transform: translateY(-3px); border-color: rgba(74,124,158,0.1); }
.test-card__text { font-size: 0.9rem; line-height: 1.8; font-style: italic; color: var(--color-text-muted); }
.test-card__author { display: block; margin-top: 16px; font-size: 0.8rem; color: var(--color-primary); font-weight: 500; letter-spacing: 1px; }

/* ===== CTA ===== */
.cta__title { font-family: var(--font-display); font-size: 2rem; font-weight: 700; margin-bottom: 14px; letter-spacing: 1px; }
.cta__desc { color: var(--color-text-muted); font-size: 1rem; margin-bottom: 32px; }

/* ===== PÁGINAS INTERNAS ===== */
.page-hero { padding: 130px 0 60px; text-align: center; position: relative; background: var(--color-surface); }
.page-hero::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--color-primary), transparent); opacity: 0.15; }
.page-hero__title { font-family: var(--font-display); font-size: 2.4rem; font-weight: 700; line-height: 1.15; margin-bottom: 12px; letter-spacing: 2px; }
.page-hero__desc { color: var(--color-text-muted); font-size: 1rem; max-width: 480px; margin: 0 auto; }

/* ===== SERVICIOS LISTA ===== */
.svc-group { margin-bottom: 48px; }
.svc-group__title { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; margin-bottom: 20px; color: var(--color-primary); letter-spacing: 2px; border-bottom: 1px solid rgba(74,124,158,0.06); padding-bottom: 10px; }
.svc-list { display: flex; flex-direction: column; gap: 10px; }
.svc-item { display: flex; justify-content: space-between; align-items: center; padding: 16px 20px; gap: 16px; transition: var(--transition); }
.svc-item:hover { border-color: rgba(74,124,158,0.1); transform: translateX(4px); }
.svc-item--feat { border-color: var(--color-primary) !important; background: rgba(74,124,158,0.02); }
.svc-item__name { font-size: 1rem; font-weight: 500; margin-bottom: 4px; }
.svc-item__desc { font-size: 0.82rem; color: var(--color-text-muted); line-height: 1.5; }
.svc-item__price { font-family: var(--font-display); font-size: 0.95rem; color: var(--color-primary); white-space: nowrap; font-weight: 700; letter-spacing: 1px; }

/* ===== GALERÍA ===== */
.gallery-filters { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 36px; }
.gallery-filter { padding: 10px 22px; border-radius: 4px; border: 1px solid rgba(74,124,158,0.08); background: transparent; color: var(--color-text-muted); font-family: var(--font-body); font-size: 0.8rem; font-weight: 400; cursor: pointer; transition: var(--transition); letter-spacing: 1px; text-transform: uppercase; }
.gallery-filter:hover { border-color: var(--color-primary); color: var(--color-primary); }
.gallery-filter--active { background: var(--color-primary); color: var(--color-bg); border-color: var(--color-primary); font-weight: 500; }
.gallery-grid { display: grid; grid-template-columns: 1fr; gap: 14px; }
.gallery-item { position: relative; border-radius: var(--radius-sm); overflow: hidden; cursor: pointer; aspect-ratio: 4 / 3; box-shadow: 0 4px 20px rgba(0,0,0,0.2); transition: var(--transition); }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; filter: grayscale(0.5); }
.gallery-item:hover { box-shadow: 0 12px 40px rgba(0,0,0,0.3); }
.gallery-item:hover img { transform: scale(1.08); filter: grayscale(0); }
.gallery-item__overlay { position: absolute; bottom: 0; left: 0; right: 0; padding: 16px; background: linear-gradient(transparent, rgba(13,13,23,0.7)); opacity: 0; transition: opacity 0.3s ease; }
.gallery-item:hover .gallery-item__overlay { opacity: 1; }
.gallery-item__label { font-size: 0.85rem; font-weight: 500; color: var(--color-text); }

/* ===== CONTACTO ===== */
.contact-grid { display: grid; gap: 32px; }
.contact-info { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.contact-card { padding: 24px 20px; text-align: center; transition: var(--transition); background: var(--color-surface); border-radius: var(--radius-sm); border: 1px solid rgba(74,124,158,0.04); }
.contact-card:hover { transform: translateY(-3px); border-color: rgba(74,124,158,0.1); }
.contact-card__icon { font-size: 1.6rem; margin-bottom: 10px; color: var(--color-primary); }
.contact-card__title { font-family: var(--font-display); font-size: 0.9rem; font-weight: 700; margin-bottom: 8px; letter-spacing: 2px; text-transform: uppercase; }
.contact-card__text { font-size: 0.85rem; color: var(--color-text-muted); line-height: 1.5; }
.contact-card__link { color: var(--color-primary); font-size: 0.9rem; font-weight: 500; }
.contact-form-wrap { padding: 36px 28px; background: var(--color-surface); border-radius: var(--radius-sm); border: 1px solid rgba(74,124,158,0.04); }
.contact-form__title { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; margin-bottom: 6px; letter-spacing: 1px; }
.contact-form__desc { color: var(--color-text-muted); font-size: 0.9rem; margin-bottom: 24px; }
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 0.75rem; font-weight: 500; color: var(--color-text-muted); margin-bottom: 6px; letter-spacing: 2px; text-transform: uppercase; }
.form-input { width: 100%; padding: 14px 16px; border-radius: var(--radius-sm); border: 1px solid rgba(74,124,158,0.06); background: rgba(255,255,255,0.015); color: var(--color-text); font-family: var(--font-body); font-size: 0.95rem; transition: var(--transition); outline: none; }
.form-input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(74,124,158,0.06); }
.form-input::placeholder { color: rgba(255,255,255,0.06); }
.form-textarea { resize: vertical; min-height: 100px; }
.map-container { border-radius: var(--radius-md); overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.2); }

/* ===== WHATSAPP ===== */
.wa-float { position: fixed; bottom: 24px; right: 24px; width: 56px; height: 56px; border-radius: 50%; background: #25D366; display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 24px rgba(37,211,102,0.4); z-index: 999; transition: var(--transition); animation: waBounce 2s ease-in-out infinite; }
.wa-float:hover { transform: scale(1.1); box-shadow: 0 8px 32px rgba(37,211,102,0.6); }
@keyframes waBounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }

/* ===== FOOTER ===== */
.footer { background: #08080f; padding: 48px 0 24px; border-top: 1px solid rgba(74,124,158,0.03); }
.footer__inner { display: flex; flex-direction: column; gap: 32px; }
.footer__grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
.footer__brand { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; margin-bottom: 6px; color: var(--color-text); letter-spacing: 3px; }
.footer__accent { color: var(--color-primary); }
.footer__heading { font-family: var(--font-display); font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 3px; color: var(--color-primary); margin-bottom: 10px; }
.footer__text { font-size: 0.85rem; color: rgba(255,255,255,0.2); line-height: 1.8; }
.footer__link { color: var(--color-primary); font-weight: 400; }
.footer__bottom { display: flex; flex-direction: column; gap: 4px; text-align: center; padding-top: 24px; border-top: 1px solid rgba(74,124,158,0.03); font-size: 0.8rem; color: rgba(255,255,255,0.12); }
.footer__presentto { color: var(--color-primary); font-size: 0.78rem; opacity: 0.4; }

/* ===== BLUEPRINT ANIMATION ===== */
.hero__blueprint {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  opacity: 0.06; pointer-events: none; z-index: 1;
  color: #1e40af;
}
.blueprint-shape {
  animation: drawLine 4s ease-in-out infinite alternate;
}
.blueprint-shape--delay {
  animation-delay: 1.5s;
}
@keyframes drawLine {
  to { stroke-dashoffset: 0; }
}
.blueprint-compass {
  transform-origin: 700px 120px;
  animation: compassSpin 20s linear infinite;
}
@keyframes compassSpin {
  to { transform: rotate(360deg); }
}
@media (prefers-reduced-motion: reduce) {
  .hero__blueprint { display: none; }
}

/* ===== PERSPECTIVE REVEAL ===== */
.perspective-reveal {
  transition: transform 0.1s ease-out;
  transform-style: preserve-3d;
}

/* ===== RESPONSIVE 768px ===== */
@media (min-width: 768px) {
  .container { padding: 0 32px; }
  .section { padding: 100px 0; }
  .section__title { font-size: 2.4rem; }
  .header__inner { padding: 18px 32px; }
  .nav-toggle { display: none; }
  .nav { position: static; width: auto; max-width: none; height: auto; background: none; backdrop-filter: none; border: none; }
  .nav__list { flex-direction: row; gap: 2px; }
  .nav__link { padding: 8px 18px; font-size: 0.85rem; }
  .hero__title { font-size: 4.5rem; }
  .hero__title-line--sub { font-size: 2rem; letter-spacing: 12px; }
  .about { grid-template-columns: 1fr 1fr; gap: 56px; }
  .about__img img { height: 420px; }
  .stat__num { font-size: 2.4rem; }
  .srv-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .proj-grid { grid-template-columns: repeat(3, 1fr); }
  .test-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .contact-info { grid-template-columns: 1fr 1fr; }
  .footer__grid { grid-template-columns: repeat(3, 1fr); }
  .footer__bottom { flex-direction: row; justify-content: space-between; }
  .page-hero__title { font-size: 3rem; }
}

/* ===== RESPONSIVE 1024px+ ===== */
@media (min-width: 1024px) {
  .container { padding: 0 40px; }
  .section__title { font-size: 2.8rem; }
  .hero__title { font-size: 5.5rem; }
  .hero__title-line--sub { font-size: 2.2rem; }
  .hero__content { max-width: 800px; }
  .srv-grid { grid-template-columns: repeat(4, 1fr); }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
  .wa-float { width: 60px; height: 60px; bottom: 32px; right: 32px; }
  .about__img img { height: 500px; }
}

@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
.hero__content { animation: fadeInUp 0.8s ease-out; }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: rgba(74,124,158,0.12); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(74,124,158,0.2); }
::selection { background: var(--color-primary); color: var(--color-bg); }

/* ===== SCROLL REVEAL ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal--left { transform: translateX(-30px); }
.reveal--left.is-visible { transform: translateX(0); }
.reveal--right { transform: translateX(30px); }
.reveal--right.is-visible { transform: translateX(0); }
.reveal--scale { transform: scale(0.9); }
.reveal--scale.is-visible { transform: scale(1); }
/* Stagger delays */
.reveal--d1 { transition-delay: 0.1s; }
.reveal--d2 { transition-delay: 0.2s; }
.reveal--d3 { transition-delay: 0.3s; }
.reveal--d4 { transition-delay: 0.4s; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal--left, .reveal--right, .reveal--scale {
    opacity: 1;
    transform: none;
  }
}