/* ═══════════════════════════════════════════════════════════
   Joe Mercedes — Arquitecto · Ingeniero
   Architectural palette: concrete / charcoal + bronze accent
   ═══════════════════════════════════════════════════════════ */

/* ─── Base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background-color: #0C0E10;
  color: #F4F5F6;
  font-family: 'Inter', sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ─── Nav ──────────────────────────────────────────────── */
#navbar {
  transition: background 0.4s ease, border-color 0.4s ease, backdrop-filter 0.4s ease;
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  background-color: rgba(12, 14, 16, 0.97);
  border-bottom-color: #2A2F34;
  backdrop-filter: blur(8px);
}

.nav-link {
  position: relative;
  letter-spacing: 0.1em;
  font-size: 0.72rem;
  text-transform: uppercase;
  color: #F4F5F6;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: #C8A24B;
  transition: width 0.35s ease;
}

.nav-link:hover { color: #C8A24B; }
.nav-link:hover::after { width: 100%; }

/* Language toggle */
.lang-toggle {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: #8A9299;
  border: 1px solid #2A2F34;
  padding: 0.4rem 0.7rem;
  background: none;
  cursor: pointer;
  transition: color 0.3s ease, border-color 0.3s ease;
}
.lang-toggle:hover { color: #F4F5F6; border-color: #C8A24B; }
.lang-toggle .lang-active { color: #C8A24B; }

/* Hamburger */
.hamburger { display: flex; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; }
.hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: #F4F5F6;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ─── Mobile Menu ──────────────────────────────────────── */
#mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  background: #0C0E10;
  border-top: 1px solid transparent;
}
#mobile-menu.open {
  max-height: 460px;
  border-top-color: #2A2F34;
}

/* ─── Hero ─────────────────────────────────────────────── */
.hero-section {
  background:
    linear-gradient(to bottom, rgba(12,14,16,0.62) 0%, rgba(12,14,16,0.9) 100%),
    url('../images/hero.jpg') center / cover no-repeat,
    #16191C;
  background-size: cover;
  background-position: center;
}

.page-header {
  background:
    linear-gradient(to bottom, rgba(12,14,16,0.78) 0%, rgba(12,14,16,0.94) 100%),
    url('../images/hero-projects.jpg') center / cover no-repeat,
    #16191C;
}

.page-header-services {
  background:
    linear-gradient(to bottom, rgba(12,14,16,0.78) 0%, rgba(12,14,16,0.94) 100%),
    url('../images/hero-services.jpg') center / cover no-repeat,
    #16191C;
}

/* Blueprint grid overlay — architectural texture */
.hero-pattern {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 59px, rgba(200,162,75,0.05) 59px, rgba(200,162,75,0.05) 60px),
    repeating-linear-gradient(90deg, transparent, transparent 59px, rgba(200,162,75,0.05) 59px, rgba(200,162,75,0.05) 60px);
  pointer-events: none;
}

/* ─── Typography ───────────────────────────────────────── */
.font-display { font-family: 'Space Grotesk', sans-serif; }

.display-xl {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.8rem, 7.5vw, 6.5rem);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.display-lg {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.015em;
}

.display-md {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.label-caps {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 600;
  color: #C8A24B;
}

/* ─── Dividers ─────────────────────────────────────────── */
.divider { height: 1px; background: #2A2F34; }
.divider-accent { height: 1px; background: linear-gradient(to right, transparent, #C8A24B, transparent); }

/* ─── Buttons ──────────────────────────────────────────── */
.btn-accent {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2.1rem;
  border: 1px solid #C8A24B;
  color: #C8A24B;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  transition: background 0.3s ease, color 0.3s ease;
  white-space: nowrap;
}
.btn-accent:hover { background: #C8A24B; color: #0C0E10; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2.1rem;
  border: 1px solid rgba(244,245,246,0.28);
  color: #F4F5F6;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 600;
  transition: border-color 0.3s ease, color 0.3s ease;
}
.btn-ghost:hover { border-color: #F4F5F6; }

/* ─── Project Cards ────────────────────────────────────── */
.project-card {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  display: block;
  background: #16191C;
}

.project-card img,
.project-card .card-placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.project-card:hover img,
.project-card:hover .card-placeholder {
  transform: scale(1.06);
}

.card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(12,14,16,0.94) 0%, rgba(12,14,16,0.2) 50%, transparent 100%);
  opacity: 0;
  transition: opacity 0.4s ease;
  display: flex;
  align-items: flex-end;
  padding: 1.75rem;
}

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

/* Placeholder tile — blueprint look */
.card-placeholder {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: #3A4046;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 23px, rgba(200,162,75,0.06) 23px, rgba(200,162,75,0.06) 24px),
    repeating-linear-gradient(90deg, transparent, transparent 23px, rgba(200,162,75,0.06) 23px, rgba(200,162,75,0.06) 24px),
    #16191C;
}
.card-placeholder span {
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #5A636A;
}

/* ─── Scroll Animations ────────────────────────────────── */
.fade-up { opacity: 0; transform: translateY(32px); }
.fade-up.animated {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.75s ease, transform 0.75s ease;
}
.fade-up-delay-1.animated { transition-delay: 0.1s; }
.fade-up-delay-2.animated { transition-delay: 0.2s; }
.fade-up-delay-3.animated { transition-delay: 0.3s; }

/* ─── Credential / Stat Bar ────────────────────────────── */
.cred-item {
  padding: 1.75rem 2rem;
  border-right: 1px solid #2A2F34;
  flex: 1;
  min-width: 0;
}
.cred-item:last-child { border-right: none; }

/* ─── Service Grid ─────────────────────────────────────── */
.service-card {
  padding: 2.5rem 2rem;
  border: 1px solid #2A2F34;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.service-card:hover { border-color: #C8A24B; background: #16191C; }
.service-card svg { transition: stroke 0.3s ease; }
.service-card:hover svg { stroke: #C8A24B; }

/* ─── Portfolio Filter ─────────────────────────────────── */
.filter-btn {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8A9299;
  padding: 0.5rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.3s ease, border-color 0.3s ease;
  background: none;
  border-top: none; border-left: none; border-right: none;
  cursor: pointer;
  white-space: nowrap;
}
.filter-btn:hover { color: #F4F5F6; }
.filter-btn.active { color: #C8A24B; border-bottom-color: #C8A24B; }

/* ─── Lightbox ─────────────────────────────────────────── */
#lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.96);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
#lightbox.open { display: flex; }
#lightbox img { max-width: 90vw; max-height: 90vh; object-fit: contain; }

#lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  color: #8A9299;
  cursor: pointer;
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #2A2F34;
  transition: color 0.3s ease, border-color 0.3s ease;
}
#lightbox-close:hover { color: #F4F5F6; border-color: #F4F5F6; }

/* ─── Form ─────────────────────────────────────────────── */
.form-input {
  width: 100%;
  background: #16191C;
  border: 1px solid #2A2F34;
  color: #F4F5F6;
  padding: 0.9rem 1.125rem;
  font-size: 0.875rem;
  font-family: 'Inter', sans-serif;
  transition: border-color 0.3s ease;
  outline: none;
  -webkit-appearance: none;
}
.form-input::placeholder { color: #8A9299; }
.form-input:focus { border-color: #C8A24B; }
select.form-input { cursor: pointer; }

.form-label {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #8A9299;
  margin-bottom: 0.5rem;
}

/* ─── About alternating layout ─────────────────────────── */
.about-block:nth-child(even) .about-text { order: 2; }
.about-block:nth-child(even) .about-img  { order: 1; }

@media (max-width: 768px) {
  .about-block .about-text,
  .about-block .about-img { order: unset !important; }

  .cred-item {
    border-right: none;
    border-bottom: 1px solid #2A2F34;
    flex: none;
    width: 100%;
  }
  .cred-item:last-child { border-bottom: none; }
}

/* ─── Selection ────────────────────────────────────────── */
::selection { background: #C8A24B33; color: #F4F5F6; }