/* ============================================================
   state-components.css — 共用狀態組件
   相依: styles.css (需先載入)
   Class 前綴: sc-
   ============================================================ */

/* ---- Custom Properties ---- */
:root {
  --sc-spinner-size: 40px;
  --sc-spinner-border-width: 4px;
  --sc-dot-size: 10px;
  --sc-dot-gap: 6px;
  --sc-skeleton-height: 16px;
  --sc-skeleton-radius: var(--radius-sm);
  --sc-toast-width: 360px;
  --sc-toast-radius: var(--radius-md);
  --sc-icon-size: 56px;
}

/* =============================================================
   A. .sc-loading – 載入中
   ============================================================= */
.sc-loading__container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4);
}

.sc-loading__text {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin: 0;
}

/* ---- A1. Spinner ---- */
.sc-spinner {
  width: var(--sc-spinner-size);
  height: var(--sc-spinner-size);
  border: var(--sc-spinner-border-width) solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: sc-spin 0.8s linear infinite;
}

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

/* ---- A2. Bouncing Dots ---- */
.sc-dots {
  display: flex;
  gap: var(--sc-dot-gap);
  align-items: center;
}

.sc-dots__dot {
  width: var(--sc-dot-size);
  height: var(--sc-dot-size);
  background: var(--primary-color);
  border-radius: 50%;
  animation: sc-bounce 1.2s ease-in-out infinite;
}

.sc-dots__dot:nth-child(2) {
  animation-delay: 0.2s;
}

.sc-dots__dot:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes sc-bounce {
  0%,
  80%,
  100% {
    transform: scale(0.6);
    opacity: 0.4;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ---- A3. Skeleton Screen ---- */
.sc-skeleton {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  max-width: 400px;
}

.sc-skeleton__item {
  height: var(--sc-skeleton-height);
  background: var(--card-hover);
  border-radius: var(--sc-skeleton-radius);
  overflow: hidden;
  position: relative;
}

.sc-skeleton__item::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.06),
    transparent
  );
  animation: sc-shimmer 1.5s ease-in-out infinite;
}

.sc-skeleton__item--circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.sc-skeleton__item--text-short {
  width: 60%;
}

.sc-skeleton__item--text-medium {
  width: 80%;
}

.sc-skeleton__header {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.sc-skeleton__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

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

/* =============================================================
   B. .sc-empty – 空狀態
   ============================================================= */
.sc-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  text-align: center;
  gap: var(--space-2);
}

.sc-empty__icon {
  width: 80px;
  height: 80px;
  position: relative;
  margin-bottom: var(--space-1);
  opacity: 0.5;
}

.sc-empty__icon::before {
  content: "";
  position: absolute;
  top: calc(50% - 16px);
  left: 50%;
  transform: translateX(-50%);
  width: 56px;
  height: 38px;
  border: 3px solid var(--text-secondary);
  border-radius: var(--radius-sm);
  border-top: none;
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}

.sc-empty__icon::after {
  content: "";
  position: absolute;
  top: calc(50% - 16px);
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 3px;
  background: var(--text-secondary);
  border-radius: 2px;
  box-shadow: 0 10px 0 var(--text-secondary);
}

.sc-empty__title {
  color: var(--text-primary);
  font-size: 1.2rem;
  margin: 0;
}

.sc-empty__desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 280px;
  margin: 0;
  line-height: 1.5;
}

.sc-empty__action {
  margin-top: var(--space-1);
  padding: 8px 20px;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

.sc-empty__action:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.sc-empty__action:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* =============================================================
   C. .sc-error – 錯誤
   ============================================================= */
.sc-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  text-align: center;
  gap: var(--space-2);
  border: 1px solid rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.08);
  border-radius: var(--radius-md);
}

.sc-error__icon {
  width: var(--sc-icon-size);
  height: var(--sc-icon-size);
  position: relative;
  margin-bottom: var(--space-1);
}

.sc-error__icon-circle {
  position: absolute;
  inset: 0;
  border: 3px solid var(--danger-color);
  border-radius: 50%;
  opacity: 0.4;
}

.sc-error__icon::before,
.sc-error__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 4px;
  height: 28px;
  background: var(--danger-color);
  border-radius: 2px;
}

.sc-error__icon::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.sc-error__icon::after {
  transform: translate(-50%, -50%) rotate(-45deg);
}

.sc-error__title {
  color: var(--text-primary);
  font-size: 1.2rem;
  margin: 0;
}

.sc-error__desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 300px;
  margin: 0;
  line-height: 1.5;
}

.sc-error__action {
  margin-top: var(--space-1);
  padding: 8px 20px;
  background: var(--danger-color);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

.sc-error__action:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.sc-error__action:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* =============================================================
   D. .sc-success – 成功
   ============================================================= */
.sc-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  text-align: center;
  gap: var(--space-2);
  border: 1px solid rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.08);
  border-radius: var(--radius-md);
}

.sc-success__icon {
  width: var(--sc-icon-size);
  height: var(--sc-icon-size);
  position: relative;
  margin-bottom: var(--space-1);
}

.sc-success__icon-circle {
  position: absolute;
  inset: 0;
  border: 3px solid var(--accent-color);
  border-radius: 50%;
  opacity: 0.4;
}

.sc-success__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 18px;
  border: solid var(--accent-color);
  border-width: 0 4px 4px 0;
  transform: translate(calc(-50% + 2px), calc(-50% - 3px)) rotate(45deg);
}

.sc-success__title {
  color: var(--text-primary);
  font-size: 1.2rem;
  margin: 0;
}

.sc-success__desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 300px;
  margin: 0;
  line-height: 1.5;
}

.sc-success__action {
  margin-top: var(--space-1);
  padding: 8px 20px;
  background: var(--accent-color);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

.sc-success__action:hover {
  opacity: 0.9;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.sc-success__action:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* =============================================================
   E. .sc-toast – 通知
   ============================================================= */
.sc-toast {
  position: fixed;
  top: var(--space-3);
  right: var(--space-3);
  z-index: calc(var(--z-modal) + 10);
  width: var(--sc-toast-width);
  max-width: calc(100vw - var(--space-4) * 2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--text-secondary);
  border-radius: var(--sc-toast-radius);
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
  font-size: 0.9rem;
  line-height: 1.4;
  animation: sc-toast-in 0.35s ease forwards;
}

.sc-toast.sc-toast--exit {
  animation: sc-toast-out 0.3s ease forwards;
}

.sc-toast__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
}

.sc-toast__message {
  flex: 1;
  min-width: 0;
}

.sc-toast__close {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  border-radius: 4px;
  padding: 0;
  line-height: 1;
  transition: var(--transition);
}

.sc-toast__close:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

.sc-toast__close:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Toast variants */
.sc-toast--info {
  border-left-color: var(--primary-color);
}

.sc-toast--success {
  border-left-color: var(--accent-color);
}

.sc-toast--warning {
  border-left-color: var(--warning-color);
}

.sc-toast--error {
  border-left-color: var(--danger-color);
}

/* Toast icon colors per variant */
.sc-toast--info .sc-toast__icon {
  color: var(--primary-color);
}

.sc-toast--success .sc-toast__icon {
  color: var(--accent-color);
}

.sc-toast--warning .sc-toast__icon {
  color: var(--warning-color);
}

.sc-toast--error .sc-toast__icon {
  color: var(--danger-color);
}

/* Animations */
@keyframes sc-toast-in {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes sc-toast-out {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}