/**
 * Spinner Component
Full accessibility support
 * Indicates that an action is being processed
 */

/* ========================================
   SPINNER CUSTOM PROPERTIES
   ======================================== */

.c-spinner {
  /* Base properties */
  --c-spinner-color: var(--ds-color-primary);
  --c-spinner-size: 1.5rem;
  --c-spinner-border-width: 2px;
  --c-spinner-speed: 1s;
  
  /* Animation */
  --c-spinner-animation: spinner-rotate var(--c-spinner-speed) linear infinite;
}

/* ========================================
   BASE SPINNER STYLES
   ======================================== */

.c-spinner {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--c-spinner-size);
  height: var(--c-spinner-size);
  position: relative;
}

/* Spinner circle */
.c-spinner__circle {
  width: 100%;
  height: 100%;
  border: var(--c-spinner-border-width) solid transparent;
  border-top-color: var(--c-spinner-color);
  border-radius: 50%;
  animation: var(--c-spinner-animation);
}

/* Alternative spinner with partial circle */
.c-spinner--partial .c-spinner__circle {
  border-color: var(--ds-color-border-weak);
  border-top-color: var(--c-spinner-color);
}

/* Dots spinner */
.c-spinner--dots {
  display: flex;
  gap: calc(var(--c-spinner-size) * 0.1);
}

.c-spinner--dots .c-spinner__dot {
  width: calc(var(--c-spinner-size) * 0.2);
  height: calc(var(--c-spinner-size) * 0.2);
  background: var(--c-spinner-color);
  border-radius: 50%;
  animation: spinner-dots var(--c-spinner-speed) ease-in-out infinite;
}

.c-spinner--dots .c-spinner__dot:nth-child(1) {
  animation-delay: 0s;
}

.c-spinner--dots .c-spinner__dot:nth-child(2) {
  animation-delay: calc(var(--c-spinner-speed) * 0.16);
}

.c-spinner--dots .c-spinner__dot:nth-child(3) {
  animation-delay: calc(var(--c-spinner-speed) * 0.32);
}

/* Pulse spinner */
.c-spinner--pulse .c-spinner__circle {
  border: none;
  background: var(--c-spinner-color);
  animation: spinner-pulse var(--c-spinner-speed) ease-in-out infinite;
}

/* Bars spinner */
.c-spinner--bars {
  display: flex;
  align-items: center;
  gap: calc(var(--c-spinner-size) * 0.1);
}

.c-spinner--bars .c-spinner__bar {
  width: calc(var(--c-spinner-size) * 0.15);
  height: var(--c-spinner-size);
  background: var(--c-spinner-color);
  border-radius: calc(var(--c-spinner-size) * 0.075);
  animation: spinner-bars var(--c-spinner-speed) ease-in-out infinite;
}

.c-spinner--bars .c-spinner__bar:nth-child(1) {
  animation-delay: 0s;
}

.c-spinner--bars .c-spinner__bar:nth-child(2) {
  animation-delay: calc(var(--c-spinner-speed) * 0.1);
}

.c-spinner--bars .c-spinner__bar:nth-child(3) {
  animation-delay: calc(var(--c-spinner-speed) * 0.2);
}

.c-spinner--bars .c-spinner__bar:nth-child(4) {
  animation-delay: calc(var(--c-spinner-speed) * 0.3);
}

/* ========================================
   SIZE VARIANTS
   ======================================== */

/* Extra small */
.c-spinner--size-xs {
  --c-spinner-size: 0.75rem;
  --c-spinner-border-width: 1px;
}

/* Small */
.c-spinner--size-s {
  --c-spinner-size: 1rem;
  --c-spinner-border-width: 1.5px;
}

/* Medium (default) */
.c-spinner--size-m {
  --c-spinner-size: 1.5rem;
  --c-spinner-border-width: 2px;
}

/* Large */
.c-spinner--size-l {
  --c-spinner-size: 2rem;
  --c-spinner-border-width: 2.5px;
}

/* Extra large */
.c-spinner--size-xl {
  --c-spinner-size: 2.5rem;
  --c-spinner-border-width: 3px;
}

/* Extra extra large */
.c-spinner--size-xxl {
  --c-spinner-size: 3rem;
  --c-spinner-border-width: 3.5px;
}

/* ========================================
   COLOR VARIANTS
   ======================================== */

/* Primary (default) */
.c-spinner--primary {
  --c-spinner-color: var(--ds-color-primary);
}

/* Secondary */
.c-spinner--secondary {
  --c-spinner-color: var(--ds-color-secondary);
}

/* Success */
.c-spinner--success {
  --c-spinner-color: var(--ds-color-success);
}

/* Warning */
.c-spinner--warning {
  --c-spinner-color: var(--ds-color-warning);
}

/* Danger */
.c-spinner--danger {
  --c-spinner-color: var(--ds-color-danger);
}

/* Light */
.c-spinner--light {
  --c-spinner-color: var(--ds-color-text-on-dark);
}

/* Dark */
.c-spinner--dark {
  --c-spinner-color: var(--ds-color-text);
}

/* ========================================
   SPEED VARIANTS
   ======================================== */

/* Slow */
.c-spinner--slow {
  --c-spinner-speed: 2s;
}

/* Fast */
.c-spinner--fast {
  --c-spinner-speed: 0.5s;
}

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

@keyframes spinner-rotate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

@keyframes spinner-dots {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes spinner-pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(0.8);
    opacity: 0.5;
  }
}

@keyframes spinner-bars {
  0%, 40%, 100% {
    transform: scaleY(0.4);
    opacity: 0.5;
  }
  20% {
    transform: scaleY(1);
    opacity: 1;
  }
}

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

/* Screen reader only content */
.c-spinner__sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .c-spinner,
  .c-spinner *,
  .c-spinner *::before,
  .c-spinner *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
  
  /* Show static state for reduced motion */
  .c-spinner__circle {
    border-top-color: var(--c-spinner-color);
    border-right-color: var(--c-spinner-color);
  }
  
  .c-spinner--dots .c-spinner__dot {
    opacity: 1;
    transform: scale(1);
  }
  
  .c-spinner--pulse .c-spinner__circle {
    opacity: 1;
    transform: scale(1);
  }
  
  .c-spinner--bars .c-spinner__bar {
    opacity: 1;
    transform: scaleY(1);
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .c-spinner__circle {
    border-width: calc(var(--c-spinner-border-width) + 1px);
  }
  
  .c-spinner--dots .c-spinner__dot,
  .c-spinner--pulse .c-spinner__circle,
  .c-spinner--bars .c-spinner__bar {
    outline: 1px solid;
  }
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
  .c-spinner {
    display: none !important;
  }
}

/* ========================================
   INTEGRATION STYLES
   ======================================== */

/* Spinner in buttons */
.c-button .c-spinner {
  --c-spinner-size: 1rem;
  margin-inline-end: var(--ds-space-xs);
}

.c-button--size-s .c-spinner {
  --c-spinner-size: 0.875rem;
}

.c-button--size-l .c-spinner {
  --c-spinner-size: 1.125rem;
}

/* Spinner in inputs */
.c-input .c-spinner,
.c-combobox .c-spinner {
  --c-spinner-size: 1rem;
  --c-spinner-color: var(--ds-color-text-weak);
}

/* Spinner overlay */
.c-spinner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(2px);
  z-index: var(--ds-z-overlay);
}

.c-spinner-overlay--dark {
  background: rgba(0, 0, 0, 0.8);
}

/* Spinner with text */
.c-spinner-with-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--ds-space-s);
}

.c-spinner-with-text--horizontal {
  flex-direction: row;
}

.c-spinner-text {
  font-size: var(--ds-font-size-s);
  color: var(--ds-color-text-weak);
  text-align: center;
}

/* ========================================
   UTILITIES
   ======================================== */

/* Center spinner */
.c-spinner--center {
  margin: 0 auto;
}

/* Block spinner */
.c-spinner--block {
  display: flex;
  width: 100%;
  justify-content: center;
}

/* Inline spinner */
.c-spinner--inline {
  display: inline-flex;
  vertical-align: middle;
}