/* ============================================
   ARD Ingeniería y Construcción — style.css
   Estética: industrial refinada, seria y moderna
   ============================================ */

/* ---- Variables ---- */
:root {
  --color-primary:    #C8972A;   /* dorado óxido — acero corten */
  --color-primary-dk: #A87820;
  --color-dark:       #111410;
  --color-dark-2:     #1C1E19;
  --color-dark-3:     #252720;
  --color-mid:        #3A3D35;
  --color-light:      #F5F3EE;
  --color-white:      #FFFFFF;
  --color-text:       #1C1E19;
  --color-text-muted: #6B6E62;
  --color-border:     #E0DDD6;

  --font-display: 'Barlow Condensed', sans-serif;
  --font-body:    'Lato', sans-serif;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --shadow-sm:  0 1px 3px rgba(0,0,0,.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,.12);
  --shadow-lg:  0 12px 40px rgba(0,0,0,.18);

  --transition: 0.25s ease;
  --max-width:  1200px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 3rem);
}
.section { padding-block: clamp(4rem, 8vw, 7rem); }
.section-dark { background: var(--color-dark); color: var(--color-light); }
.section-accent { background: var(--color-dark-2); color: var(--color-light); }

/* ---- Typography ---- */
h1, h2, h3 { font-family: var(--font-display); font-weight: 700; line-height: 1.1; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.8rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

/* ---- Section headers ---- */
.section-header { text-align: center; max-width: 640px; margin-inline: auto; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.section-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}
.section-title { margin-bottom: 1rem; }
.section-desc { color: var(--color-text-muted); font-size: 1.05rem; }
.section-dark .section-desc, .section-accent .section-desc { color: #9B9E93; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-dark);
}
.btn-primary:hover { background: var(--color-primary-dk); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-outline {
  border: 1.5px solid rgba(255,255,255,0.5);
  color: var(--color-white);
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-full { width: 100%; justify-content: center; }
.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: #25D366;
  color: #fff;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  width: 100%;
  justify-content: center;
  margin-top: 1.5rem;
}
.btn-whatsapp:hover { background: #1da851; transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* ---- NAVBAR ---- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding-block: 1.1rem;
  transition: all var(--transition);
}
.navbar.scrolled {
  background: rgba(17,20,16,0.97);
  backdrop-filter: blur(12px);
  padding-block: 0.75rem;
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.logo { display: flex; align-items: baseline; gap: 0.5rem; }
.logo-ard {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  line-height: 1;
}
.logo-sub {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.55);
  font-weight: 300;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}
.nav-links a:hover { color: var(--color-white); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  color: var(--color-primary) !important;
  border: 1px solid var(--color-primary);
  padding: 0.45rem 1rem;
  border-radius: var(--radius-sm);
}
.nav-cta:hover { background: var(--color-primary); color: var(--color-dark) !important; }
.nav-cta::after { display: none !important; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--color-white);
  transition: all var(--transition);
  border-radius: 2px;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- HERO ---- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  background: var(--color-dark);
  color: var(--color-white);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('images/hero/hero-bg.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(17,20,16,0.85) 0%, rgba(17,20,16,0.4) 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 6rem;
  padding-bottom: 2rem;
  max-width: 780px;
}
.hero-eyebrow {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}
.hero-title {
  font-size: clamp(3rem, 7vw, 5.5rem);
  margin-bottom: 1.5rem;
  color: var(--color-white);
}
.hero-title em {
  font-style: normal;
  color: var(--color-primary);
}
.hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  max-width: 520px;
  margin-bottom: 2.5rem;
  font-weight: 300;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-stats {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0;
  padding: 1.5rem clamp(1.25rem, 5vw, 3rem);
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: auto;
}
.stat { text-align: center; flex: 1; padding: 0.5rem; }
.stat-num {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}
.stat-plus { font-family: var(--font-display); font-size: 1.5rem; color: var(--color-primary); }
.stat-label { display: block; font-size: 0.78rem; color: rgba(255,255,255,0.5); text-transform: uppercase; letter-spacing: 0.08em; margin-top: 0.3rem; }
.stat-divider { width: 1px; height: 48px; background: rgba(255,255,255,0.15); flex-shrink: 0; }

/* ---- SERVICES ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.service-card {
  background: var(--color-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 0;
  background: var(--color-primary);
  transition: height 0.35s ease;
}
.service-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.service-card:hover::before { height: 100%; }
.service-icon {
  width: 56px; height: 56px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-primary);
  transition: all var(--transition);
}
.service-card:hover .service-icon { background: var(--color-primary); color: var(--color-dark); border-color: var(--color-primary); }
.service-card h3 { margin-bottom: 0.6rem; color: var(--color-text); }
.service-card p { color: var(--color-text-muted); font-size: 0.95rem; }

/* ---- PROJECTS ---- */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.project-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-dark-3);
  border: 1px solid rgba(255,255,255,0.07);
  transition: all var(--transition);
}
.project-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.project-img-wrap {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--color-mid);
}
.project-img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.project-card:hover .project-img-wrap img { transform: scale(1.04); }
.project-overlay {
  position: absolute; inset: 0;
  background: rgba(200,151,42,0.85);
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.project-overlay span {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-dark);
}
.project-card:hover .project-overlay { opacity: 1; }
.project-info { padding: 1.5rem; }
.project-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}
.project-info h3 { color: var(--color-white); margin-bottom: 0.5rem; font-size: 1.1rem; }
.project-info p { color: #9B9E93; font-size: 0.9rem; }
.projects-cta { text-align: center; }

/* ---- TEAM ---- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}
.team-card {
  display: flex;
  gap: 1.5rem;
  background: var(--color-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  align-items: flex-start;
  transition: box-shadow var(--transition);
}
.team-card:hover { box-shadow: var(--shadow-md); }
.team-photo-wrap {
  width: 88px; height: 88px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--color-mid);
  border: 3px solid var(--color-primary);
}
.team-photo-wrap img { width: 100%; height: 100%; object-fit: cover; }
.team-info h3 { margin-bottom: 0.2rem; font-size: 1.15rem; }
.team-role {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}
.team-info p { font-size: 0.9rem; color: var(--color-text-muted); margin-bottom: 1rem; }
.team-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.team-tags span {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ---- NOSOTROS ---- */
.nosotros-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.nosotros-text .section-tag { color: var(--color-primary); }
.nosotros-text .section-title { color: var(--color-white); margin-bottom: 1.25rem; }
.nosotros-text p { color: #9B9E93; margin-bottom: 1rem; font-size: 0.975rem; }
.nosotros-list { margin-top: 1.5rem; display: flex; flex-direction: column; gap: 0.75rem; }
.nosotros-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: rgba(245,243,238,0.85);
  font-size: 0.95rem;
}
.nosotros-list svg { color: var(--color-primary); flex-shrink: 0; }
.nosotros-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
}
.visual-block {
  background: var(--color-dark-3);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.5rem;
  transition: background var(--transition);
}
.visual-block:hover { background: var(--color-mid); }
.visual-num {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
}
.visual-num sup { font-size: 1.5rem; }
.visual-label { font-size: 0.78rem; color: #9B9E93; text-align: center; line-height: 1.4; }

/* ---- CONTACT ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 4rem;
  align-items: start;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1rem; }
label { font-size: 0.82rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--color-text-muted); }
input, select, textarea {
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-light);
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(200,151,42,0.12);
}
textarea { resize: vertical; min-height: 120px; }
.form-error { font-size: 0.78rem; color: #C0392B; }
.form-note { font-size: 0.82rem; color: var(--color-text-muted); text-align: center; margin-top: 1rem; }
.form-note a { color: var(--color-primary); text-decoration: underline; }
.form-success {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 3rem 2rem;
  gap: 1rem;
  color: var(--color-text);
}
.form-success svg { color: #27AE60; }
.form-success h3 { font-size: 1.5rem; }
.form-success p { color: var(--color-text-muted); }
.contact-info h3 { margin-bottom: 1.5rem; font-size: 1.4rem; }
.contact-list { display: flex; flex-direction: column; gap: 1.25rem; }
.contact-list li { display: flex; align-items: flex-start; gap: 1rem; }
.contact-list svg { color: var(--color-primary); flex-shrink: 0; margin-top: 2px; }
.contact-list strong { display: block; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-text-muted); margin-bottom: 0.2rem; }
.contact-list a { color: var(--color-text); transition: color var(--transition); }
.contact-list a:hover { color: var(--color-primary); }

/* ---- FOOTER ---- */
.footer { background: var(--color-dark); color: rgba(255,255,255,0.5); padding-block: 2.5rem; border-top: 1px solid rgba(255,255,255,0.07); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem; }
.footer-brand { display: flex; align-items: baseline; gap: 0.5rem; flex-wrap: wrap; }
.footer-brand p { width: 100%; font-size: 0.82rem; color: rgba(255,255,255,0.35); margin-top: 0.25rem; }
.footer-links { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer-links a { font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase; transition: color var(--transition); }
.footer-links a:hover { color: var(--color-primary); }
.footer-copy { font-size: 0.78rem; width: 100%; text-align: center; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,0.07); margin-top: 0.5rem; }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  .nosotros-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(17,20,16,0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.4rem; }
  .hamburger { display: flex; position: relative; z-index: 101; }
  .form-row { grid-template-columns: 1fr; }
  .team-card { flex-direction: column; }
  .hero-stats { flex-direction: column; gap: 1.5rem; }
  .stat-divider { width: 60px; height: 1px; }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn { text-align: center; justify-content: center; }
}