:root {
  --color-bg: #F5F2ED;
  --color-bg-alt: #CBBBAC;
  --color-text: #45212B;
  --color-heading: #45212B;
  --color-muted: #958878;
  --color-accent: #914842;
  --color-line: #CACBC5;
  --color-dark: #45212B;
  --font-heading: "Playfair Display", "Georgia", serif;
  --font-body: "Raleway", "Helvetica Neue", Arial, sans-serif;
  --font-accent: "Aboreto", serif;
  --max-width: 1200px;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header.site-header {
  position: sticky;
  top: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  padding: 0 8px;
}

.logo-img {
  height: 52px;
  width: auto;
  display: block;
}

nav.main-nav ul {
  display: flex;
  gap: 32px;
  list-style: none;
}

nav.main-nav a {
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  border-bottom-color: var(--color-accent);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
}

/* Hero */
.hero {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  background: linear-gradient(rgba(0,0,0,0.25), rgba(0,0,0,0.25)), url("../assets/img/hero.png") center/cover no-repeat;
  color: #fff;
  padding: 0 24px;
}

.hero-content {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 24px;
  text-align: center;
  margin: 0 auto;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 4rem);
  margin-bottom: 16px;
}

.hero p {
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto 32px;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  border: 1px solid currentColor;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: background 0.2s ease, color 0.2s ease;
}

.btn:hover {
  background: #fff;
  color: var(--color-text);
}

.btn-dark {
  border-color: var(--color-text);
}

.btn-dark:hover {
  background: var(--color-text);
  color: #fff;
}

/* Section */
section {
  padding: 96px 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.section-intro {
  color: var(--color-muted);
  max-width: 640px;
  margin-bottom: 48px;
}

.eyebrow {
  display: block;
  font-family: var(--font-accent);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.sobre-eyebrow {
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.pilares-subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 24px;
  font-style: italic;
}

.manifesto {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 1.5rem;
  line-height: 1.5;
  color: var(--color-heading);
  max-width: 760px;
}

/* Project grid */
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.project-card {
  display: block;
  background: #fff;
  border: 1px solid var(--color-line);
}

.project-card .thumb {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #CBBBAC;
}

.project-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.project-card:hover .thumb img {
  transform: scale(1.05);
}

.project-card .info {
  padding: 20px;
}

.project-card .info h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.project-card .info span {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.filters {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filters button {
  background: none;
  border: 1px solid var(--color-line);
  padding: 8px 18px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.filters button.active {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.values-list {
  list-style: none;
  margin-top: 24px;
}

.values-list li {
  padding: 16px 0;
  border-top: 1px solid var(--color-line);
}

.values-list li strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 4px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

form .field {
  margin-bottom: 20px;
}

form label {
  display: block;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

form input,
form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-line);
  background: #fff;
  font-family: var(--font-body);
  font-size: 0.95rem;
}

form textarea {
  min-height: 140px;
  resize: vertical;
}

.contact-info p {
  margin-bottom: 12px;
}

.contact-info h3 {
  font-family: var(--font-heading);
  margin-bottom: 16px;
}

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 40px 0;
  font-size: 0.85rem;
  color: var(--color-muted);
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-muted);
  transition: color 0.2s ease;
}

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

/* Project detail page */
.project-hero {
  height: 60vh;
  background: #CBBBAC center/cover no-repeat;
}

.project-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 48px 0;
  border-bottom: 1px solid var(--color-line);
}

.project-meta div span {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.project-gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
}

.project-gallery img {
  transition: opacity 0.2s ease;
}

.project-gallery img:hover {
  opacity: 0.85;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26, 16, 18, 0.92);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.lightbox.open {
  display: flex;
}

.lightbox-image {
  max-width: 88vw;
  max-height: 88vh;
  width: auto;
  height: auto;
  object-fit: contain;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: none;
  border: none;
  color: #F5F2ED;
  font-size: 2.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 8px;
}

.lightbox-close {
  top: 24px;
  right: 32px;
}

.lightbox-prev {
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-next {
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
}

.lightbox-counter {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  color: #F5F2ED;
  font-family: var(--font-body);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

@media (max-width: 640px) {
  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
  .lightbox-close { top: 12px; right: 16px; }
}

@media (max-width: 900px) {
  .project-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .project-meta { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  nav.main-nav { display: none; }
  .menu-toggle { display: block; }
  nav.main-nav.open {
    display: flex;
    position: absolute;
    top: 80px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
  }
  nav.main-nav.open ul {
    flex-direction: column;
    width: 100%;
    padding: 16px 24px;
    gap: 20px;
  }
  .project-grid { grid-template-columns: 1fr; }
  .project-gallery { grid-template-columns: 1fr; }
}