/* ---------- Fonts ---------- */
@font-face {
  font-family: "Cal Sans";
  src: url("fonts/CalSansVF.woff2") format("woff2-variations"),
       url("fonts/CalSansVF.woff2") format("woff2");
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

/* ---------- Colors ---------- */
:root {
  --color-black: #333333;
  --color-white: #ffffff;
  --color-gray: #f5f5f5;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 140px;
}

body {
  font-family: "Roboto", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-black);
  background: var(--color-white);
}

h1, h2, h3, h4, h5, h6 {
  font-family: "Cal Sans", "Roboto", system-ui, sans-serif;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 172px;
  font-size: 18px;
  padding: 10px 20px;
  border: 2px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  text-align: center;
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.btn-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.btn:hover .btn-icon {
  transform: translateX(4px);
}

.btn-primary {
  background: var(--color-black);
  border-color: var(--color-black);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-white);
  border-color: var(--color-black);
  color: var(--color-black);
}

.btn-outline {
  background: transparent;
  border-color: var(--color-white);
  color: var(--color-white);
}

.btn-outline:hover {
  background: var(--color-white);
  border-color: var(--color-white);
  color: var(--color-black);
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

#sobre-nosotros,
#proyectos,
#contactos {
  border-top: 1px solid var(--color-black);
}

@media (min-width: 769px) {
  #sobre-nosotros,
  #proyectos,
  #contactos {
    padding: 120px 0;
  }
}

.section h2 {
  font-family: "Cal Sans", "Roboto", system-ui, sans-serif;
  color: var(--color-black);
  font-size: 32px;
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Services ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 2.5rem;
}

.service-card {
  position: relative;
  height: 400px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 24px;
  background-color: #000;
  background-image: linear-gradient(251deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.75) 100.07%), var(--card-image);
  background-position: 50% 50%;
  background-size: cover;
  background-repeat: no-repeat;
}

.service-card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  filter: brightness(0) invert(1);
}

.service-card-title {
  font-family: "Cal Sans", "Roboto", system-ui, sans-serif;
  color: var(--color-white);
  font-size: 20px;
}

@media (max-width: 768px) {
  .services-grid {
    display: flex;
    grid-template-columns: none;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    gap: 16px;
    margin-left: -1.5rem;
    margin-right: -1.5rem;
    padding: 0 1.5rem 8px;
    scrollbar-width: none;
  }

  .services-grid::-webkit-scrollbar {
    display: none;
  }

  .service-card {
    flex: 0 0 82%;
    scroll-snap-align: center;
  }
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: stretch;
  margin-bottom: 2.5rem;
}

.about-content h2 {
  margin-bottom: 1.5rem;
}

.about-intro {
  margin-bottom: 2rem;
}

.about-media {
  overflow: hidden;
}

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

.accordion {
  border-top: 1px solid var(--color-gray);
}

.accordion-item {
  border-bottom: 1px solid var(--color-gray);
}

.accordion-item.is-open {
  background: var(--color-gray);
}

.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1rem;
  background: none;
  border: none;
  font-family: "Roboto", sans-serif;
  font-weight: 700;
  font-size: 16px;
  color: var(--color-black);
  cursor: pointer;
  text-align: left;
}

.accordion-icon {
  flex-shrink: 0;
  transform: rotate(-90deg);
  transition: transform 0.3s ease;
}

.accordion-item.is-open .accordion-icon {
  transform: rotate(0deg);
}

.accordion-panel {
  max-height: 0;
  overflow: hidden;
  font-size: 16px;
  transition: max-height 0.3s ease;
}

.accordion-item.is-open .accordion-panel {
  max-height: 400px;
}

.accordion-panel p {
  padding: 0 1rem 1.25rem;
}

.accordion-list {
  padding: 0 1rem 1.25rem;
  list-style: disc;
}

.accordion-list li {
  margin-left: 1.25rem;
  margin-bottom: 0.5rem;
}

.accordion-list li:last-child {
  margin-bottom: 0;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.stat-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 2.5rem 2rem;
  background: var(--color-gray);
}

.stat-number {
  font-family: "Cal Sans", "Roboto", system-ui, sans-serif;
  font-size: 60px;
  color: var(--color-black);
  font-weight: 700;
  line-height: 1;
}

.stat-label {
  font-size: 16px;
  color: var(--color-black);
}

@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-media {
    display: none;
  }

  .about-stats {
    grid-template-columns: 1fr;
  }
}

/* ---------- Projects ---------- */
.project-tabs {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  gap: 2rem;
  border-bottom: 1px solid var(--color-gray);
  margin-top: 2.5rem;
  margin-bottom: 2.5rem;
}

.project-tab {
  flex-shrink: 0;
  padding: 0 0 1rem;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  font-family: "Roboto", sans-serif;
  font-weight: 500;
  font-size: 16px;
  color: var(--color-black);
  opacity: 0.5;
  cursor: pointer;
}

.project-tab.is-active {
  opacity: 1;
  font-weight: 700;
  border-bottom-color: var(--color-black);
}

.project-panel {
  display: none;
}

.project-panel.is-active {
  display: block;
}

.project-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 2.5rem;
}

.project-title {
  margin-bottom: 0.75rem;
}

.project-location {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  margin-bottom: 1.25rem;
}

.project-location-icon {
  width: 14px;
  height: 14px;
}

.project-description {
  margin-bottom: 1.5rem;
}

.project-meta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--color-gray);
  border-bottom: 1px solid var(--color-gray);
  margin-bottom: 1.5rem;
}

.project-meta-item {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.project-meta-label {
  color: var(--color-black);
  opacity: 0.6;
}

.project-meta-value {
  font-weight: 700;
}

.project-amenities {
  list-style: disc;
}

.project-amenities li {
  margin-left: 1.25rem;
  margin-bottom: 0.5rem;
}

.project-amenities li:last-child {
  margin-bottom: 0;
}

.project-gallery {
  display: grid;
  grid-template-columns: 1fr 100px;
  gap: 12px;
  height: 420px;
}

.gallery-main,
.gallery-thumbs {
  height: 100%;
}

.gallery-main {
  position: relative;
  overflow: hidden;
  max-width: 100%;
}

.gallery-main .swiper-slide img,
.gallery-thumbs .swiper-slide img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  background: rgba(51, 51, 51, 0.6);
  color: var(--color-white);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.3s ease;
}

.gallery-nav:hover {
  background: var(--color-black);
}

.gallery-prev {
  left: 12px;
}

.gallery-next {
  right: 12px;
}

.gallery-thumbs .swiper-slide {
  opacity: 0.5;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.gallery-thumbs .swiper-slide-thumb-active {
  opacity: 1;
  outline: 2px solid var(--color-black);
  outline-offset: -2px;
}

.project-map {
  height: 360px;
  overflow: hidden;
}

.project-map iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

@media (max-width: 768px) {
  .project-details {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .project-gallery {
    height: 320px;
  }
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-top: 2.5rem;
  margin-bottom: 2.5rem;
}

.contact-subheading {
  font-family: "Roboto", sans-serif;
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 1.25rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-form[hidden] {
  display: none;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-black);
  background: var(--color-white);
  font-family: "Roboto", sans-serif;
  font-size: 16px;
  color: var(--color-black);
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-black);
}

.contact-form .btn {
  align-self: flex-start;
}

.contact-thanks {
  padding: 2rem;
  background: var(--color-gray);
}

.contact-thanks .contact-subheading {
  margin-bottom: 0.5rem;
}

.contact-address {
  margin-bottom: 1.25rem;
}

.contact-detail {
  margin-bottom: 0.5rem;
}

.contact-detail a {
  text-decoration: underline;
}

.contact-map {
  height: 360px;
  overflow: hidden;
}

.contact-map iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: url("images/rt-4/image-01.avif") center/cover no-repeat;
  color: var(--color-white);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(51, 51, 51, 0.55);
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: left;
}

.hero-subheading {
  font-family: "Roboto", sans-serif;
  font-weight: 500;
  font-size: 18px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.hero-heading {
  font-family: "Cal Sans", "Roboto", system-ui, sans-serif;
  font-size: clamp(32px, 6vw, 65px);
  line-height: 1.2;
  text-transform: uppercase;
  overflow-wrap: break-word;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

@media (max-width: 480px) {
  .hero-break {
    display: none;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-subheading,
.hero-heading,
.hero-actions {
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
}

.hero-subheading {
  animation-delay: 0.1s;
}

.hero-heading {
  animation-delay: 0.25s;
}

.hero-actions {
  animation-delay: 0.4s;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: transparent;
  padding: 20px 0 0;
  transition: background 0.3s ease, padding 0.3s ease;
  z-index: 100;
}

.site-header.scrolled {
  background: var(--color-black);
  padding: 20px 0;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo img {
  width: 100px;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-links a {
  font-family: "Roboto", sans-serif;
  font-weight: 500;
  font-size: 16px;
  color: var(--color-white);
}

.nav-links a:not(.btn) {
  position: relative;
  padding-bottom: 4px;
}

.nav-links a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.nav-links a:not(.btn):hover::after {
  transform: scaleX(1);
}

.nav-arrow {
  display: none;
}

.site-header.scrolled .nav-links .btn-primary {
  background: transparent;
  border-color: var(--color-white);
  color: var(--color-white);
}

/* ---------- Hamburger ---------- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 26px;
  height: 18px;
  margin-left: auto;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  z-index: 101;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger.is-active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 4rem 0 2rem;
  background: var(--color-black);
  color: var(--color-white);
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 4rem;
}

.footer-logo {
  width: 70px;
  margin-bottom: 1rem;
}

.footer-address {
  font-size: 14px;
  opacity: 0.7;
}

.footer-social {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.footer-social img {
  width: 20px;
  height: 20px;
  filter: brightness(0) invert(1);
}

.footer-social a:hover {
  opacity: 0.7;
}

.footer-copyright {
  font-size: 12px;
  opacity: 0.6;
  text-align: right;
}

.built-by {
  position: fixed;
  bottom: 20px;
  left: 20px;
  z-index: 30;
  display: flex;
  align-items: center;
  background: var(--color-white);
  color: var(--color-black);
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  padding: 10px 18px;
  border-radius: 50px;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.built-by.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.built-by:hover {
  opacity: 0.7;
}

@media (max-width: 600px) {
  .footer-top {
    flex-direction: column;
  }

  .footer-copyright {
    text-align: left;
  }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  html {
    scroll-padding-top: 100px;
  }

  .hamburger {
    display: flex;
  }

  .logo img {
    width: 60px;
  }

  .nav-links .btn-primary {
    display: flex;
    width: 100%;
    background: var(--color-black);
    border-color: var(--color-black);
    color: var(--color-white);
    border-radius: 10px;
    padding: 14px 20px;
    margin-top: 0;
  }

  .nav-links .btn-primary:hover,
  .site-header.scrolled .nav-links .btn-primary:hover {
    background: var(--color-white);
    color: var(--color-black);
  }

  .site-header.scrolled .nav-links .btn-primary {
    background: var(--color-black);
    border-color: var(--color-black);
    color: var(--color-white);
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 14px);
    left: 1rem;
    right: 1rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-white);
    border-radius: 20px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.25);
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.35s ease, padding 0.35s ease, opacity 0.25s ease;
  }

  .nav-links.is-open {
    max-height: 600px;
    padding: 1.75rem 1.5rem 2rem;
    opacity: 1;
  }

  .nav-links a:not(.btn) {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 16px;
    padding: 22px 4px;
    border-bottom: 1px solid rgba(51, 51, 51, 0.12);
    font-size: 18px;
    color: var(--color-black);
  }

  .nav-links li:nth-last-child(2) a:not(.btn) {
    border-bottom: none;
  }

  .nav-links a:not(.btn) .nav-arrow {
    display: block;
    width: 18px;
    height: 18px;
    color: var(--color-black);
    opacity: 0.5;
    flex-shrink: 0;
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .nav-links a:not(.btn):hover .nav-arrow,
  .nav-links a:not(.btn):active .nav-arrow {
    opacity: 1;
    transform: translateX(4px);
  }
}