/* ========================================
   Loaders & Spinners
   ======================================== */

/* Spinner */
.spinner {
  display: inline-block;
  width: 2rem;
  height: 2rem;
  border: 3px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Spinner sizes */
.spinner--sm {
  width: 1rem;
  height: 1rem;
  border-width: 2px;
}

.spinner--lg {
  width: 3rem;
  height: 3rem;
  border-width: 4px;
}

.spinner--xl {
  width: 4rem;
  height: 4rem;
  border-width: 5px;
}

/* Spinner variants */
.spinner--primary {
  border-top-color: var(--color-primary);
}

.spinner--secondary {
  border-top-color: var(--color-secondary);
}

.spinner--white {
  border-color: rgba(255, 255, 255, 0.3);
  border-top-color: white;
}

/* Loading overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-overlay);
}

.loading-overlay__content {
  text-align: center;
  color: white;
}

.loading-overlay__spinner {
  margin: 0 auto var(--spacing-md);
}

.loading-overlay__text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}

/* Inline loader */
.loader-inline {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* Skeleton loader */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-gray-200) 0%,
    var(--color-gray-100) 50%,
    var(--color-gray-200) 100%
  );
  background-size: 200% 100%;
  animation: skeleton-pulse 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes skeleton-pulse {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Skeleton variants */
.skeleton--text {
  height: 1rem;
  margin-bottom: var(--spacing-xs);
}

.skeleton--title {
  height: 1.5rem;
  width: 60%;
  margin-bottom: var(--spacing-md);
}

.skeleton--avatar {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
}

.skeleton--card {
  height: 12rem;
  border-radius: var(--radius-lg);
}

.skeleton--button {
  height: 2.5rem;
  width: 8rem;
  border-radius: var(--radius-md);
}

/* Dots loader */
.dots-loader {
  display: inline-flex;
  gap: 0.25rem;
}

.dots-loader__dot {
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  animation: dots-bounce 1.4s ease-in-out infinite;
}

.dots-loader__dot:nth-child(1) {
  animation-delay: -0.32s;
}

.dots-loader__dot:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes dots-bounce {
  0%, 80%, 100% {
    transform: scale(0);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Progress bar */
.progress {
  width: 100%;
  height: 0.5rem;
  background-color: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.progress__bar--animated {
  animation: progress-indeterminate 1.5s ease-in-out infinite;
}

@keyframes progress-indeterminate {
  0% {
    width: 0;
    margin-left: 0;
  }
  50% {
    width: 50%;
    margin-left: 25%;
  }
  100% {
    width: 0;
    margin-left: 100%;
  }
}

/* Loading text animation */
.loading-text {
  display: inline-block;
}

.loading-text::after {
  content: '';
  animation: loading-dots 1.5s steps(4, end) infinite;
}

@keyframes loading-dots {
  0%, 20% {
    content: '';
  }
  40% {
    content: '.';
  }
  60% {
    content: '..';
  }
  80%, 100% {
    content: '...';
  }
}