/*
  F1Key Website - Loader Component
  Full-screen loading animation
*/

/* ==================== */
/* LOADER CONTAINER */
/* ==================== */

.loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: var(--color-black);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-loader);
  transition: opacity var(--transition-slow) ease, 
              visibility var(--transition-slow) ease;
}

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

/* ==================== */
/* LOADER CONTENT */
/* ==================== */

.loader-content {
  text-align: center;
  max-width: 500px;
  padding: var(--spacing-md);
}

/* ==================== */
/* LOADER LOGO */
/* ==================== */

.loader-logo {
  font-family: var(--font-primary);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: var(--font-weight-black);
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
  letter-spacing: var(--letter-spacing-tight);
  animation: logoFadeIn 0.8s ease-out forwards;
}

.loader-logo .highlight {
  color: var(--color-ferrari-red);
}

/* ==================== */
/* LOADER PROGRESS BAR */
/* ==================== */

.loader-bar {
  width: 100%;
  height: 4px;
  background-color: var(--color-medium-gray);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
}

.loader-progress {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--color-ferrari-red) 0%,
    #ff1744 50%,
    var(--color-ferrari-red) 100%
  );
  border-radius: var(--radius-full);
  width: 0;
  animation: progressBar 2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  position: relative;
}

/* Shine effect on progress bar */
.loader-progress::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 100%
  );
  animation: shine 1.5s ease-in-out infinite;
}

/* ==================== */
/* ANIMATIONS */
/* ==================== */

@keyframes logoFadeIn {
  0% {
    opacity: 0;
    transform: translateY(-20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes progressBar {
  0% {
    width: 0;
  }
  100% {
    width: 100%;
  }
}

@keyframes shine {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* ==================== */
/* LOADING TEXT (Optional) */
/* ==================== */

.loader-text {
  margin-top: var(--spacing-sm);
  font-size: var(--font-size-sm);
  color: var(--color-light-gray);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}

/* ==================== */
/* RESPONSIVE */
/* ==================== */

@media (max-width: 640px) {
  .loader-content {
    padding: var(--spacing-sm);
  }
  
  .loader-logo {
    margin-bottom: var(--spacing-md);
  }
  
  .loader-bar {
    height: 3px;
  }
}

/* ==================== */
/* ACCESSIBILITY */
/* ==================== */

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  .loader-logo {
    animation: none;
  }
  
  .loader-progress {
    animation: progressBarSimple 2s linear forwards;
  }
  
  .loader-progress::after {
    animation: none;
  }
  
  .loader-text {
    animation: none;
    opacity: 0.7;
  }
}

@keyframes progressBarSimple {
  0% {
    width: 0;
  }
  100% {
    width: 100%;
  }
}