/* ============================================================
   DESIGN SYSTEM — API Ingeniería (Alfredo Perullini)
   Paleta: #c9a227 (dorado), #1a2644 (azul marino), #243158
           #f5f3ee (crema), #2d6a4f (verde eco)
   Tipografía: Montserrat (display) + Inter (body)
   ============================================================ */

/* ---------- Custom Properties ---------- */
:root {
  --color-primary:     #c9a227;
  --color-primary-dk:  #a8841f;
  --color-primary-lt:  #d4b53a;
  --color-dark:        #1a2644;
  --color-navy:        #243158;
  --color-gray-mid:    #6b7280;
  --color-light:       #f5f3ee;
  --color-accent:      #2d6a4f;
  --color-white:       #ffffff;
  --transition-base:   0.3s ease;
  --transition-slow:   0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--color-white);
  color: var(--color-dark);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

/* ---------- Navbar ---------- */
#navbar {
  background: transparent;
  transition: background 0.4s ease, padding 0.3s ease, box-shadow 0.3s ease;
}

#navbar.navbar-scrolled {
  background: rgba(26, 38, 68, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 30px rgba(0, 0, 0, 0.3);
  padding-top: 12px !important;
  padding-bottom: 12px !important;
}

.nav-link {
  position: relative;
  padding-bottom: 2px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

/* Dropdown */
.dropdown { position: relative; }

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 12px);
  left: -20px;
  min-width: 240px;
  background: rgba(26, 38, 68, 0.98);
  backdrop-filter: blur(12px);
  border-top: 2px solid var(--color-primary);
  z-index: 200;
  padding: 8px 0;
}

.dropdown:hover .dropdown-menu,
.dropdown-menu:hover { display: block; }

.dropdown-menu a {
  display: block;
  padding: 10px 20px;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  transition: color 0.2s, background 0.2s;
}

.dropdown-menu a:hover {
  color: var(--color-primary);
  background: rgba(201, 162, 39, 0.08);
}

/* Mobile menu */
#mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

#mobile-menu.open { max-height: 600px; }

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-dark);
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 14px 28px;
  border: 2px solid var(--color-primary);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-base), color var(--transition-base), transform 0.2s;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--color-primary-dk);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 0;
}

.btn-primary:hover::before { transform: scaleX(1); transform-origin: left; }
.btn-primary > * { position: relative; z-index: 1; }
.btn-primary:hover { color: var(--color-white); }
.btn-primary:active { transform: scale(0.98); }

.btn-outline-white {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-white);
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 14px 28px;
  border: 2px solid rgba(255,255,255,0.6);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-base), border-color var(--transition-base), color var(--transition-base);
}

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

.btn-outline-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-dark);
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 14px 28px;
  border: 2px solid var(--color-dark);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-base), color var(--transition-base);
}

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

.btn-gold-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-primary);
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 14px 28px;
  border: 2px solid var(--color-primary);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-base), color var(--transition-base);
}

.btn-gold-outline:hover {
  background: var(--color-primary);
  color: var(--color-dark);
}

/* ---------- Section utilities ---------- */
.section-tag {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.section-tag-light {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(201, 162, 39, 0.7);
}

.section-heading {
  font-family: 'Montserrat', sans-serif;
  font-weight: 300;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.15;
  color: var(--color-dark);
}

.section-heading-light {
  font-family: 'Montserrat', sans-serif;
  font-weight: 300;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.15;
  color: var(--color-white);
}

/* ---------- Project / Service Cards ---------- */
.project-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.project-card .card-image {
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover .card-image { transform: scale(1.06); }

/* ---------- Service cards (light) ---------- */
.service-card {
  background: var(--color-white);
  border: 1px solid #e8e5de;
  padding: 36px 32px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.service-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 8px 30px rgba(201, 162, 39, 0.12);
  transform: translateY(-4px);
}

.service-icon {
  width: 56px;
  height: 56px;
  border: 1.5px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 20px;
  transition: background var(--transition-base);
}

.service-card:hover .service-icon {
  background: var(--color-primary);
  color: var(--color-dark);
}

/* ---------- Feature Cards (dark bg) ---------- */
.feature-card {
  padding: 36px 32px;
  border: 1px solid rgba(201, 162, 39, 0.12);
  transition: border-color var(--transition-base), background var(--transition-base);
}

.feature-card:hover {
  border-color: var(--color-primary);
  background: rgba(201, 162, 39, 0.05);
}

.feature-icon {
  width: 52px;
  height: 52px;
  border: 1px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 20px;
  transition: background var(--transition-base);
}

.feature-card:hover .feature-icon {
  background: var(--color-primary);
  color: var(--color-dark);
}

/* ---------- Badges ---------- */
.badge-status-active {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-dark);
  font-family: 'Montserrat', sans-serif;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 5px 10px;
}

.badge-status-done {
  display: inline-block;
  background: #374151;
  color: var(--color-white);
  font-family: 'Montserrat', sans-serif;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 5px 10px;
}

.badge-status-eco {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-white);
  font-family: 'Montserrat', sans-serif;
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 5px 10px;
}

/* ---------- Form Inputs ---------- */
.form-input {
  width: 100%;
  padding: 14px 16px;
  background: #f5f3ee;
  border: 1px solid transparent;
  border-bottom: 2px solid #d8d3c8;
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  color: var(--color-dark);
  outline: none;
  transition: border-color var(--transition-base), background var(--transition-base);
  appearance: none;
  -webkit-appearance: none;
}

.form-input::placeholder { color: #9ca3af; }

.form-input:focus {
  border-color: transparent;
  border-bottom-color: var(--color-primary);
  background: var(--color-white);
}

/* ---------- Footer links ---------- */
.footer-link {
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.45);
  text-decoration: none;
  transition: color var(--transition-base);
  display: block;
}

.footer-link:hover { color: var(--color-primary); }

/* ---------- Scroll indicator ---------- */
.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  position: relative;
  flex-shrink: 0;
}

.scroll-indicator::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 2px;
  animation: scrollBounce 1.6s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  80%       { transform: translateX(-50%) translateY(12px); opacity: 0; }
}

/* ---------- Scroll-reveal animations ---------- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.from-left  { transform: translateX(-32px); }
.animate-on-scroll.from-right { transform: translateX(32px); }

.animate-on-scroll.animated {
  opacity: 1;
  transform: translate(0, 0);
}

/* Stagger delays */
.delay-100  { transition-delay: 100ms; }
.delay-150  { transition-delay: 150ms; }
.delay-200  { transition-delay: 200ms; }
.delay-300  { transition-delay: 300ms; }
.delay-400  { transition-delay: 400ms; }
.delay-450  { transition-delay: 450ms; }
.delay-500  { transition-delay: 500ms; }
.delay-600  { transition-delay: 600ms; }
.delay-700  { transition-delay: 700ms; }
.delay-750  { transition-delay: 750ms; }

/* ---------- Stat numbers ---------- */
.stat-number {
  font-family: 'Montserrat', sans-serif;
  font-weight: 900;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  color: var(--color-primary);
  line-height: 1;
}

/* ---------- Page hero (interior pages) ---------- */
.page-hero {
  position: relative;
  height: 55vh;
  min-height: 380px;
  display: flex;
  align-items: flex-end;
  padding-bottom: 60px;
  overflow: hidden;
}

/* ---------- Gold divider line ---------- */
.gold-line {
  width: 48px;
  height: 3px;
  background: var(--color-primary);
}

/* ---------- Team cards ---------- */
.team-card { position: relative; overflow: hidden; }

.team-card .team-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,38,68,0.92) 0%, rgba(26,38,68,0.2) 50%, transparent 100%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.team-card:hover .team-overlay { opacity: 1; }

/* ---------- Responsive ---------- */
@media (max-width: 480px) {
  .btn-primary, .btn-outline-white, .btn-outline-dark, .btn-gold-outline {
    padding: 12px 22px;
    font-size: 0.65rem;
  }
}