/* ══════════════════════════════════════
   PRELOADER
   ══════════════════════════════════════ */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.preloader--hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader__logo {
  height: 48px;
  width: auto;
  max-width: 80%;
  display: block;
  margin: 0 auto;
  opacity: 0;
  animation: preloaderPulse 1.5s ease-in-out infinite;
}

@keyframes preloaderPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ══════════════════════════════════════
   PAGE TRANSITION (reuses preloader)
   ══════════════════════════════════════ */
.preloader--exit {
  opacity: 0;
  visibility: hidden;
}

.preloader--exit.preloader--navigating {
  opacity: 1;
  visibility: visible;
}

/* ══════════════════════════════════════
   PAGE CONTENT ENTRANCE
   ══════════════════════════════════════ */
.page-enter {
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.page-enter--visible {
  opacity: 1;
  transform: translateY(0);
}

/* ══════════════════════════════════════
   SMOOTH SCROLL BEHAVIOR
   ══════════════════════════════════════ */
html {
  scroll-behavior: smooth;
}

/* ══════════════════════════════════════
   UX: HOVER LIFT ON CARDS
   ══════════════════════════════════════ */
.proyecto-card {
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 0.4s ease;
}

.proyecto-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* ══════════════════════════════════════
   UX: NAVBAR SMOOTH APPEARANCE
   ══════════════════════════════════════ */
.navbar {
  transition: background 0.4s ease, box-shadow 0.4s ease, transform 0.4s ease;
}

.navbar--hidden {
  transform: translateY(-100%);
}

/* ══════════════════════════════════════
   UX: BUTTONS MICRO-INTERACTION
   ══════════════════════════════════════ */
.navbar__cta {
  transition: background 0.3s ease, transform 0.2s ease;
}

.navbar__cta:active {
  transform: scale(0.96);
}

.proy-contact__submit {
  transition: all 0.3s ease, transform 0.2s ease;
}

.proy-contact__submit:active {
  transform: scale(0.96);
}

/* ══════════════════════════════════════
   UX: IMAGE LOAD FADE-IN
   ══════════════════════════════════════ */
img[data-img] {
  opacity: 0;
  transition: opacity 0.5s ease;
}

img[data-img].img-loaded {
  opacity: 1;
}