:root {
  --bg: #0f1115;
  --panel: #0d1116;
  --text: #eef1f4;
  --muted: #9aa3b2;
  --primary: #ffd437;
  --accent: #5dd6c0;
  --container: 1200px;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', Arial, system-ui;
  background: linear-gradient(180deg, #071019, #0f1115);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* Preloader */
.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader {
  width: 50px;
  height: 50px;
  border: 5px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  border-top-color: var(--primary);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ====== HEADER ====== */
header {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: 1000;
  background: rgba(15, 17, 21, 0.8);
  backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: var(--transition);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-decoration: none;
  color: var(--text);
}

.logo img {
  height: 60px;
  width: auto;
  transition: var(--transition);
}

.logo:hover img {
  transform: scale(1.05);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 26px;
}

.nav-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  padding: 5px 0;
  transition: var(--transition);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a:focus {
  color: var(--primary);
}

.nav-links a:hover::after,
.nav-links a:focus::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: 1001;
}

.hamburger {
  display: block;
  width: 100%;
  height: 3px;
  background: var(--text);
  border-radius: 3px;
  transition: var(--transition);
}

.menu-toggle:hover .hamburger {
  background: var(--primary);
}

.spacer {
  height: 80px;
}

/* ====== BANNER / HERO (slider) ====== */
.banner {
  position: relative;
  height: 94vh;
  min-height: 50vh;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.slides {
  position: absolute;
  inset: 0;
}

.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
  display: grid;
  place-items: center;
}

.slide.active {
  opacity: 1;
}

.slide::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.45), rgba(0, 0, 0, 0.65));
  z-index: 1;
}

.slide-media {
  position: absolute;
  inset: -2% -2%;
  background-size: cover;
  background-position: center;
  filter: brightness(0.9) saturate(1.1);
  transform: scale(1.06);
}

.banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 28px 20px;
  max-width: 860px;
  margin: auto;
}

.banner-content h2 {
  color: #fff;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  margin-bottom: 16px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.banner-content p {
  color: var(--muted);
  margin: 0 0 24px;
  font-size: 1.1rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.cta {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  background: var(--primary);
  color: #1b1b1b;
  padding: 14px 24px;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid rgba(0, 0, 0, 0.1);
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(255, 212, 55, 0.3);
}

.cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(255, 212, 55, 0.4);
}

.banner .arrow {
  position: absolute;
  top: 50%;
  translate: 0 -50%;
  font-size: 24px;
  padding: 12px;
  border-radius: 10px;
  background: rgba(20, 24, 33, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text);
  cursor: pointer;
  user-select: none;
  transition: var(--transition);
  z-index: 3;
}

.banner .arrow:hover {
  background: rgba(20, 24, 33, 0.9);
  transform: translateY(-50%) scale(1.1);
}

.banner .prev {
  left: 18px;
}

.banner .next {
  right: 18px;
}

.dots {
  position: absolute;
  left: 50%;
  bottom: 24px;
  translate: -50% 0;
  display: flex;
  gap: 10px;
  z-index: 3;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: var(--transition);
}

.dot:hover {
  background: rgba(255, 255, 255, 0.5);
}

.dot.active {
  width: 28px;
  background: linear-gradient(90deg, var(--primary), #f7e3a2);
  border-color: transparent;
}

/* ====== SOMOS ====== */
.section {
  padding: 100px 0;
  position: relative;
}

h2 {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 20px;
  text-align: center;
  position: relative;
  display: inline-block;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: var(--primary);
}

.lead {
  color: var(--muted);
  max-width: 760px;
  margin: 0 auto 40px;
  text-align: center;
  font-size: 1.1rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.feature {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}

.feature:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.feature-icon {
  width: 70px;
  height: 70px;
  background: rgba(255, 212, 55, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--primary);
  font-size: 28px;
}

.feature h3 {
  font-size: 1.4rem;
  margin-bottom: 15px;
  color: var(--text);
}

.feature p {
  color: var(--muted);
  line-height: 1.6;
}

.stats-container {
  display: flex;
  justify-content: center;
  align-items: stretch;
  gap: 30px;
  flex-wrap: wrap;
  padding: 50px 30px;
  margin-top: 40px;
}

.stat {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 30px 20px;
  flex: 1 1 220px;
  max-width: 260px;
  text-align: center;
  transition: var(--transition);
}

.stat:hover {
  transform: translateY(-10px);
  background: rgba(255, 212, 55, 0.05);
}

.stat i {
  font-size: 42px;
  color: var(--primary);
  margin-bottom: 15px;
}

.stat h2 {
  font-size: 2.8rem;
  font-weight: bold;
  margin: 0;
  color: #fff;
}

.stat p {
  margin-top: 10px;
  font-size: 1rem;
  color: var(--muted);
}

/* Animaciones de entrada */
.hidden {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease-out;
}

.show {
  opacity: 1;
  transform: translateY(0);
}

/* Portafolio */
.portfolio-tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 30px;
  justify-content: center;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 20px;
  border-radius: 30px;
  border: none;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.tab-btn.active {
  background: var(--primary);
  color: #111;
  box-shadow: 0 4px 15px rgba(255, 212, 55, 0.3);
}

.portfolio-gallery {
  display: none;
  position: relative;
  padding: 20px 0;
}

.portfolio-gallery.active {
  display: block;
}

.gallery-track {
  display: flex;
  gap: 20px;
  overflow: hidden;
  scroll-behavior: smooth;
}

.portfolio-item {
  flex: 0 0 calc((100% - 3*20px) / 4);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.portfolio-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

.portfolio-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: var(--transition);
}

.portfolio-item:hover img {
  transform: scale(1.05);
}

.portfolio-item p {
  text-align: center;
  padding: 15px 10px;
  color: var(--muted);
  background: var(--panel);
  margin: 0;
  font-weight: 500;
}

.gallery-scroll {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  background: rgba(0, 0, 0, 0.6);
  border: none;
  color: #fff;
  font-size: 18px;
  padding: 15px;
  border-radius: 50%;
  cursor: pointer;
  outline: none;
  transition: var(--transition);
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gallery-scroll:hover {
  background: var(--primary);
  color: #111;
  transform: translateY(-50%) scale(1.1);
}

.gallery-scroll.prev {
  left: -25px;
}

.gallery-scroll.next {
  right: -25px;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 20px;
}

.lightbox.open {
  display: flex;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 80vh;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.lb-close,
.lb-prev,
.lb-next {
  position: absolute;
  background: none;
  border: none;
  color: #fff;
  font-size: 32px;
  cursor: pointer;
  transition: var(--transition);
  z-index: 2001;
}

.lb-close:hover,
.lb-prev:hover,
.lb-next:hover {
  color: var(--primary);
}

.lb-close {
  top: 20px;
  right: 30px;
  font-size: 36px;
}

.lb-prev {
  left: 30px;
  top: 50%;
  transform: translateY(-50%);
}

.lb-next {
  right: 30px;
  top: 50%;
  transform: translateY(-50%);
}

.lb-counter {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  color: var(--muted);
  font-size: 14px;
  background: rgba(0, 0, 0, 0.5);
  padding: 5px 15px;
  border-radius: 20px;
}

/* SERVICIOS */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.service-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-15px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.service-media {
  overflow: hidden;
  height: 200px;
}

.service-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.service-card:hover .service-media img {
  transform: scale(1.1);
}

.service-body {
  padding: 25px;
  color: var(--muted);
}

.service-body h3 {
  font-size: 1.4rem;
  margin-bottom: 15px;
  color: var(--text);
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  margin-top: 15px;
  transition: var(--transition);
}

.service-link:hover {
  gap: 12px;
}

/* Versión horizontal para servicios */
.service-card {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  height: auto;
  min-height: 100px;
}

.service-media {
  width: 120px; /* Ancho fijo para la imagen */
  height: auto;
  flex-shrink: 0;
}

.service-media img {
  height: 100%;
  width: 100%;
  object-fit: cover;
}

.service-body {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 12px 15px;
}

/* Versión responsive para móvil */
@media (max-width: 768px) {
  .service-card {
    flex-direction: column;
  }
  
  .service-media {
    width: 100%;
    height: 80px;
  }
}

/* CONTACTO */
#contacto {
  position: relative;
  background: url("_img/fondo-contacto.webp") center/cover no-repeat;
  padding: 100px 20px;
  color: #fff;
}

#contacto::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  z-index: 0;
}

#contacto .container {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: auto;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: start;
}

.contact-info {
  background: rgba(255, 255, 255, 0.05);
  padding: 35px;
  border-radius: 16px;
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.contact-info h3 {
  margin-bottom: 25px;
  font-size: 1.8rem;
  color: var(--primary);
}

.contact-info p {
  margin: 16px 0;
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 1.1rem;
}

.contact-info i {
  color: var(--primary);
  font-size: 1.2rem;
  width: 24px;
  text-align: center;
}

.socials {
  margin-top: 30px;
  display: flex;
  gap: 15px;
}

.socials a {
  color: #fff;
  font-size: 1.4rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: var(--transition);
}

.socials a:hover {
  color: var(--primary);
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-5px);
}

/* FORMULARIO */
.contact-form {
  background: #fff;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  text-align: left;
}

.form-group {
  margin-bottom: 20px;
  position: relative;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 16px 20px;
  border: 1px solid #ddd;
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
  background: #f9f9f9;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 212, 55, 0.2);
  background: #fff;
}

.error-message {
  color: #e74c3c;
  font-size: 0.85rem;
  margin-top: 5px;
  display: none;
}

.form-group.error input,
.form-group.error textarea {
  border-color: #e74c3c;
}

.form-group.error .error-message {
  display: block;
}

.contact-form button {
  background: var(--primary);
  color: #1b1b1b;
  font-weight: 700;
  padding: 16px 20px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  width: 100%;
  transition: var(--transition);
  font-size: 1rem;
}

.contact-form button:hover {
  background: #111;
  color: var(--primary);
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.form-success {
  background: #2ecc71;
  color: white;
  padding: 15px;
  border-radius: 10px;
  margin-top: 20px;
  text-align: center;
  display: none;
}

/* Form messages */
.form-message {
  display: none;
  padding: 15px;
  border-radius: 10px;
  margin-top: 20px;
  text-align: center;
  animation: fadeIn 0.5s ease;
}

.form-message.success {
  background: rgba(46, 204, 113, 0.1);
  border: 1px solid #2ecc71;
  color: #2ecc71;
}

.form-message.error {
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid #e74c3c;
  color: #e74c3c;
}

.form-message i {
  font-size: 24px;
  margin-right: 10px;
  vertical-align: middle;
}

.form-message p {
  display: inline-block;
  vertical-align: middle;
  margin: 0;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ====== btn arriba ====== */
#btnArriba {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 99;
  width: 50px;
  height: 50px;
  background-color: var(--primary);
  color: #111;
  border: none;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  display: none;
  justify-content: center;
  align-items: center;
  box-shadow: 0 4px 15px rgba(255, 212, 55, 0.4);
  transition: var(--transition);
}

#btnArriba:hover {
  background-color: #111;
  color: var(--primary);
  transform: translateY(-5px);
}

/* FOOTER */
/* Footer mejorado */
footer {
  padding: 50px 0 20px;
  background: var(--panel);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 30px;
}

.footer-services h3,
.footer-contact h3,
.footer-social h3 {
  color: var(--primary);
  margin-bottom: 20px;
  font-size: 1.2rem;
}

.footer-services ul {
  list-style: none;
  padding: 0;
}

.footer-services li {
  margin-bottom: 10px;
}

.footer-services a {
  color: var(--muted);
  text-decoration: none;
  transition: var(--transition);
}

.footer-services a:hover {
  color: var(--primary);
  padding-left: 5px;
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  color: var(--muted);
}

.footer-contact i {
  color: var(--primary);
  width: 20px;
}

.socials {
  display: flex;
  gap: 15px;
}

.socials a {
  color: var(--muted);
  font-size: 1.4rem;
  transition: var(--transition);
}

.socials a:hover {
  color: var(--primary);
  transform: translateY(-3px);
}

.copyright {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--muted);
}

/* RESPONSIVE */
@media (max-width: 1024px) {
  .portfolio-item {
    flex: 0 0 calc((100% - 2*20px) / 3);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    right: 18px;
    top: 70px;
    background: rgba(6, 10, 14, 0.96);
    padding: 20px;
    border-radius: 10px;
    flex-direction: column;
    gap: 15px;
    width: 200px;
    box-shadow: var(--shadow);
    z-index: 999;
  }
  
  .nav-links.open {
    display: flex;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .menu-toggle.active .hamburger:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .menu-toggle.active .hamburger:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active .hamburger:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .banner-content h2 {
    font-size: 2rem;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
  
  .portfolio-item {
    flex: 0 0 calc((100% - 20px) / 2);
  }
  
  .gallery-scroll.prev {
    left: 10px;
  }
  
  .gallery-scroll.next {
    right: 10px;
  }
}

@media (max-width: 480px) {
  .portfolio-item {
    flex: 0 0 100%;
  }
  
  .stats-container {
    padding: 30px 15px;
  }
  
  .stat {
    flex: 1 1 100%;
    max-width: 100%;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-form {
    padding: 25px;
  }
}