/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --black: #0f0f0f;
  --white: #fafafa;
  --gray-100: #f4f3f1;
  --gray-200: #e8e5e0;
  --gray-400: #a0998f;
  --gray-600: #6b6460;
  --accent: #1a1a1a;
  --gold: #c9a96e;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --nav-h: 72px;
  --radius: 2px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-sans); color: var(--black); background: var(--white); line-height: 1.6; -webkit-font-smoothing: antialiased; }

img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ===== TYPOGRAPHY ===== */
h1 { font-family: var(--font-serif); font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 400; line-height: 1.1; }
h2 { font-family: var(--font-serif); font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 400; line-height: 1.2; }
h3 { font-size: 1.1rem; font-weight: 500; letter-spacing: 0.01em; }
h4 { font-size: 1rem; font-weight: 500; }
p { color: var(--gray-600); line-height: 1.75; }

/* ===== LAYOUT ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-alt { background: var(--gray-100); }
.section-dark { background: var(--black); color: var(--white); }
.section-dark p { color: var(--gray-400); }

.section-header { text-align: center; margin-bottom: 60px; }
.section-header.light h2 { color: var(--white); }
.section-tag { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.15em; text-transform: uppercase; color: var(--gold); margin-bottom: 12px; }
.section-desc { max-width: 520px; margin: 16px auto 0; }

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-block; padding: 14px 32px;
  background: var(--black); color: var(--white);
  font-size: 0.875rem; font-weight: 500; letter-spacing: 0.05em;
  border: 1px solid var(--black); transition: var(--transition);
}
.btn-primary:hover { background: transparent; color: var(--black); }
.btn-ghost {
  display: inline-block; padding: 14px 32px;
  background: transparent; color: var(--white);
  font-size: 0.875rem; font-weight: 500; letter-spacing: 0.05em;
  border: 1px solid rgba(255,255,255,0.4); transition: var(--transition);
}
.btn-ghost:hover { background: rgba(255,255,255,0.1); }
.btn-full { width: 100%; text-align: center; }

/* ===== NAVBAR ===== */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(250,250,250,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: var(--transition);
}
#navbar.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.08); }
.nav-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; height: 100%; display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--font-sans); font-size: 1.125rem; font-weight: 600; letter-spacing: 0.05em; color: var(--black); }
.logo span { color: var(--gold); }
.nav-links { display: flex; gap: 40px; align-items: center; }
.nav-links a { font-size: 0.875rem; font-weight: 400; color: var(--gray-600); transition: color var(--transition); }
.nav-links a:hover { color: var(--black); }
.btn-nav {
  padding: 9px 22px !important;
  border: 1px solid var(--black) !important;
  color: var(--black) !important;
  font-weight: 500 !important;
  transition: var(--transition) !important;
}
.btn-nav:hover { background: var(--black); color: var(--white) !important; }
.menu-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.menu-toggle span { display: block; width: 24px; height: 1.5px; background: var(--black); transition: var(--transition); }

/* ===== HERO ===== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; flex-direction: column;
  justify-content: center; align-items: flex-start;
  padding: calc(var(--nav-h) + 60px) 24px 60px;
  max-width: 1200px; margin: 0 auto;
  overflow: hidden;
}
.hero-bg { position: fixed; inset: 0; z-index: -1; }
.hero-video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.38;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(250,250,250,0.78) 0%, rgba(244,243,241,0.62) 50%, rgba(200,195,185,0.1) 100%);
}

/* ── Video Showcase ── */
.video-showcase {
  position: relative;
  width: 100%;
  height: 70vh;
  min-height: 400px;
  overflow: hidden;
  background: #0a0a0a;
}
.showcase-video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.showcase-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: flex-end; justify-content: flex-start;
  padding: 32px 48px;
  background: linear-gradient(to top, rgba(0,0,0,0.45) 0%, transparent 60%);
}
.showcase-label {
  font-size: 0.7rem; font-weight: 500; letter-spacing: 0.25em;
  text-transform: uppercase; color: rgba(255,255,255,0.6);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--gray-200) 1px, transparent 1px),
    linear-gradient(90deg, var(--gray-200) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.5;
}
.hero-eyebrow { font-size: 0.75rem; font-weight: 500; letter-spacing: 0.2em; text-transform: uppercase; color: var(--gold); margin-bottom: 24px; }
.hero h1 em { font-style: italic; color: var(--gold); }
.hero-sub { max-width: 480px; margin-top: 24px; font-size: 1.1rem; color: var(--gray-600); }
.hero-actions { display: flex; gap: 16px; margin-top: 40px; flex-wrap: wrap; }
.hero-stats {
  display: flex; align-items: center; gap: 40px;
  margin-top: 80px; padding-top: 40px;
  border-top: 1px solid var(--gray-200);
}
.stat { display: flex; flex-direction: column; }
.stat-num { font-family: var(--font-serif); font-size: 2rem; font-weight: 400; color: var(--black); }
.stat-label { font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gray-400); margin-top: 2px; }
.stat-sep { width: 1px; height: 40px; background: var(--gray-200); }

/* ===== PROJECTS ===== */
.filter-bar { display: flex; gap: 8px; margin-bottom: 48px; flex-wrap: wrap; }
.filter-btn {
  padding: 8px 20px; font-size: 0.8rem; font-weight: 500;
  letter-spacing: 0.05em; background: none;
  border: 1px solid var(--gray-200); cursor: pointer;
  transition: var(--transition); color: var(--gray-600);
}
.filter-btn:hover, .filter-btn.active { background: var(--black); color: var(--white); border-color: var(--black); }

.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; }
.project-card.featured { grid-row: span 2; }
.project-img { position: relative; aspect-ratio: 4/3; overflow: hidden; background: var(--gray-200); }
.project-card.featured .project-img { aspect-ratio: auto; height: 100%; min-height: 400px; }
.project-placeholder { position: absolute; inset: 0; transition: transform 0.6s ease; }
.project-card:hover .project-placeholder { transform: scale(1.04); }
.project-overlay {
  position: absolute; inset: 0;
  background: rgba(15,15,15,0.6);
  display: flex; align-items: flex-end; justify-content: flex-end;
  padding: 24px; opacity: 0; transition: var(--transition);
}
.project-card:hover .project-overlay { opacity: 1; }
.project-link { color: var(--white); font-size: 0.875rem; font-weight: 500; letter-spacing: 0.05em; }
.project-info { padding: 20px 0 8px; }
.project-cat { font-size: 0.7rem; font-weight: 600; letter-spacing: 0.15em; text-transform: uppercase; color: var(--gold); }
.project-info h3 { margin: 6px 0 6px; color: var(--black); }
.project-info p { font-size: 0.875rem; }
.project-card[style*="display: none"] { display: none !important; }

/* ===== ABOUT ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-visual { position: relative; height: 560px; }
.about-img-main { position: absolute; inset: 0 60px 60px 0; }
.about-img-accent { position: absolute; bottom: 0; right: 0; width: 200px; height: 220px; border: 6px solid var(--gray-100); }
.about-badge {
  position: absolute; bottom: 60px; left: -20px;
  background: var(--black); color: var(--white);
  padding: 20px 28px; display: flex; align-items: center; gap: 12px;
}
.badge-num { font-family: var(--font-serif); font-size: 2.5rem; color: var(--gold); line-height: 1; }
.badge-text { font-size: 0.8rem; letter-spacing: 0.05em; color: var(--gray-400); line-height: 1.4; }
.about-text h2 { margin: 12px 0 20px; }
.about-text p + p { margin-top: 16px; }
.values-list { margin: 28px 0 36px; display: flex; flex-direction: column; gap: 12px; }
.values-list li { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; color: var(--gray-600); }
.val-icon { color: var(--gold); font-size: 0.6rem; }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-card { text-align: center; }
.team-photo { width: 100%; aspect-ratio: 3/4; overflow: hidden; margin-bottom: 16px; background: var(--gray-200); }
.team-card h4 { font-size: 0.95rem; color: var(--black); margin-bottom: 4px; }
.team-card p { font-size: 0.8rem; color: var(--gold); font-weight: 500; letter-spacing: 0.05em; }

/* ===== SERVICES ===== */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--gray-200); }
.service-card { background: var(--white); padding: 40px 36px; transition: var(--transition); }
.service-card:hover { background: var(--black); }
.service-card:hover h3 { color: var(--white); }
.service-card:hover p { color: var(--gray-400); }
.service-card:hover .service-icon { color: var(--gold); }
.service-icon { width: 40px; height: 40px; color: var(--black); margin-bottom: 20px; transition: var(--transition); }
.service-card h3 { margin-bottom: 12px; transition: var(--transition); }
.service-card p { font-size: 0.875rem; }

/* ===== PROCESS ===== */
.process-steps {
  display: flex; align-items: flex-start; justify-content: center;
  gap: 16px; flex-wrap: wrap; margin-top: 16px;
}
.step { text-align: center; max-width: 200px; }
.step-num { font-family: var(--font-serif); font-size: 3rem; color: var(--gold); opacity: 0.6; line-height: 1; margin-bottom: 16px; }
.step h4 { color: var(--white); margin-bottom: 10px; font-size: 1.05rem; }
.step p { font-size: 0.85rem; }
.step-arrow { font-size: 1.5rem; color: var(--gold); opacity: 0.4; margin-top: 40px; }

/* ===== CONTACT ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 80px; align-items: start; }
.contact-info h2 { margin: 12px 0 20px; }
.contact-data { display: flex; flex-direction: column; gap: 20px; margin: 32px 0; }
.contact-data li { display: flex; align-items: flex-start; gap: 14px; font-size: 0.9rem; color: var(--gray-600); }
.contact-data svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: 2px; color: var(--gold); }
.social-links { display: flex; gap: 16px; }
.social-links a { width: 40px; height: 40px; border: 1px solid var(--gray-200); display: flex; align-items: center; justify-content: center; color: var(--gray-400); transition: var(--transition); }
.social-links a:hover { border-color: var(--black); color: var(--black); }
.social-links svg { width: 16px; height: 16px; }

.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.8rem; font-weight: 500; letter-spacing: 0.05em; text-transform: uppercase; color: var(--black); }
.form-group input, .form-group select, .form-group textarea {
  padding: 12px 16px; border: 1px solid var(--gray-200);
  background: var(--white); font-family: var(--font-sans);
  font-size: 0.9rem; color: var(--black);
  transition: border-color var(--transition); outline: none; appearance: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--black); }
.form-group textarea { resize: vertical; min-height: 130px; }
.form-note { font-size: 0.78rem; color: var(--gray-400); text-align: center; }
.form-success { background: #e8f5e9; color: #2e7d32; padding: 16px; text-align: center; font-size: 0.9rem; border: 1px solid #a5d6a7; margin-top: 12px; }
.form-error { background: #fdecea; color: #c62828; padding: 16px; text-align: center; font-size: 0.9rem; border: 1px solid #ef9a9a; margin-top: 12px; }
.form-error a { color: #c62828; }
.hidden { display: none; }

/* ===== WHATSAPP ===== */
.btn-whatsapp {
  display: inline-flex; align-items: center; gap: 10px;
  background: #25d366; color: #fff;
  padding: 14px 24px; border-radius: 2px;
  font-size: 0.95rem; font-weight: 500; text-decoration: none;
  transition: background 0.2s; margin-bottom: 28px;
}
.btn-whatsapp:hover { background: #1ebe5d; }

/* ===== FOOTER ===== */
.footer { background: var(--black); padding: 40px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
.footer .logo { color: var(--white); font-size: 1rem; }
.footer-copy { font-size: 0.8rem; color: var(--gray-600); }
.footer-nav { display: flex; gap: 28px; }
.footer-nav a { font-size: 0.8rem; color: var(--gray-600); transition: color var(--transition); }
.footer-nav a:hover { color: var(--white); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .project-card.featured { grid-row: span 1; }
  .project-card.featured .project-img { min-height: auto; }
  .about-grid { grid-template-columns: 1fr; gap: 60px; }
  .about-visual { height: 400px; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 60px; }
}

@media (max-width: 768px) {
  .section { padding: 70px 0; }
  .nav-links { display: none; flex-direction: column; gap: 0; position: absolute; top: var(--nav-h); left: 0; right: 0; background: var(--white); border-bottom: 1px solid var(--gray-200); padding: 16px 24px; }
  .nav-links.open { display: flex; }
  .nav-links li { padding: 12px 0; border-bottom: 1px solid var(--gray-100); }
  .menu-toggle { display: flex; }
  .hero-stats { gap: 24px; flex-wrap: wrap; }
  .projects-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .process-steps { flex-direction: column; align-items: center; }
  .step-arrow { transform: rotate(90deg); margin: 0; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-nav { flex-wrap: wrap; justify-content: center; }
  .about-visual { height: 320px; margin-bottom: 0; }
  .about-img-accent { display: none; }
  .about-badge { display: none; }
}

/* ===== BIM GRID ===== */
.bim-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px; background: var(--gray-200); }
.bim-card { background: var(--white); padding: 36px 28px; transition: var(--transition); }
.bim-card:hover { background: var(--black); }
.bim-card:hover h4, .bim-card:hover p { color: var(--white); }
.bim-card:hover .bim-dim { color: var(--gold); }
.bim-card:hover .bim-tool { border-color: var(--gray-600); color: var(--gray-400); }
.bim-dim { font-family: var(--font-serif); font-size: 2.8rem; font-weight: 400; color: var(--gold); line-height: 1; margin-bottom: 16px; transition: var(--transition); }
.bim-card h4 { font-size: 0.95rem; margin-bottom: 10px; transition: var(--transition); }
.bim-card p { font-size: 0.85rem; margin-bottom: 20px; transition: var(--transition); }
.bim-tool { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gray-400); border: 1px solid var(--gray-200); padding: 4px 10px; transition: var(--transition); }

@media (max-width: 768px) {
  .bim-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .bim-grid { grid-template-columns: 1fr; }
}

/* ===== BIM DOCS ===== */
.bim-docs-wrap { margin-top: 48px; }
.bim-docs-label { font-size: 0.72rem; font-weight: 600; letter-spacing: 0.15em; text-transform: uppercase; color: var(--gray-400); margin-bottom: 16px; }
.bim-docs-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: var(--gray-200); }
.bim-docs-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .bim-docs-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .bim-docs-4 { grid-template-columns: 1fr; } }
.bim-doc-item { position: relative; overflow: hidden; cursor: pointer; background: var(--gray-200); }
.bim-doc-item img { width: 100%; display: block; transition: transform 0.5s ease; }
.bim-doc-item:hover img { transform: scale(1.03); }
.bim-doc-overlay {
  position: absolute; bottom: 0; left: 0; right: 0;
  background: rgba(15,15,15,0.75); padding: 14px 18px;
  transform: translateY(100%); transition: var(--transition);
}
.bim-doc-item:hover .bim-doc-overlay { transform: translateY(0); }
.bim-doc-overlay span { font-size: 0.78rem; font-weight: 500; letter-spacing: 0.06em; color: var(--white); }
@media (max-width: 600px) { .bim-docs-grid { grid-template-columns: 1fr; } }

/* ===== GALLERY MODAL ===== */
.gallery-modal {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(10,10,10,0.97);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  padding: 20px;
}
.gallery-modal.hidden { display: none; }
.gallery-stage {
  flex: 1; display: flex; align-items: center; justify-content: center;
  max-height: calc(100vh - 160px); width: 100%;
}
.gallery-stage img {
  max-width: 100%; max-height: 100%;
  object-fit: contain;
  transition: opacity 0.25s ease;
}
.gallery-close {
  position: absolute; top: 20px; right: 28px;
  background: none; border: none; color: var(--white);
  font-size: 1.5rem; cursor: pointer; opacity: 0.6; transition: opacity 0.2s;
}
.gallery-close:hover { opacity: 1; }
.gallery-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  background: none; border: 1px solid rgba(255,255,255,0.2);
  color: var(--white); font-size: 2rem; width: 52px; height: 52px;
  cursor: pointer; transition: var(--transition); display: flex;
  align-items: center; justify-content: center;
}
.gallery-nav:hover { background: rgba(255,255,255,0.1); }
.gallery-nav.prev { left: 20px; }
.gallery-nav.next { right: 20px; }
.gallery-thumbs {
  display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; justify-content: center;
}
.gallery-thumbs img,
.gallery-thumbs .thumb-video {
  width: 70px; height: 50px; object-fit: cover;
  opacity: 0.5; cursor: pointer; transition: opacity 0.2s;
  border: 2px solid transparent;
}
.gallery-thumbs img.active,
.gallery-thumbs .thumb-video.active { opacity: 1; border-color: var(--gold); }
.gallery-stage { transition: opacity 0.15s ease; }
.thumb-video {
  background: #1a1a1a; display: flex;
  align-items: center; justify-content: center;
  color: var(--gold); font-size: 1.2rem;
}
.gallery-caption {
  color: var(--gray-400); font-size: 0.8rem;
  letter-spacing: 0.05em; margin-top: 12px; text-align: center;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-up { opacity: 0; }
.fade-up.visible { animation: fadeUp 0.7s ease forwards; }