/* ==========================================================================
   dé Fabrics — Design tokens
   Loaded FIRST on every page (public site and admin panel).
   All stylesheets should consume these variables instead of raw values.
   ========================================================================== */

:root {
  /* Brand colors */
  --color-primary: #5b7492;
  --color-primary-dark: #3e5870;
  --color-accent: #aabfda;
  --color-accent-light: #bbcde7;
  --color-tint: #f0faff;

  /* Neutrals */
  --color-ink: #1f2933;
  --color-text: #333333;
  --color-muted: #6b7280;
  --color-border: #e2e6ea;
  --color-surface: #ffffff;
  --color-surface-soft: #f7f8fa;
  --color-bg: #fafbfc;

  /* Status */
  --color-success: #2e7d32;
  --color-success-bg: #e8f5e9;
  --color-error: #c62828;
  --color-error-bg: #fdecea;
  --color-warning: #b26a00;
  --color-warning-bg: #fff4e5;
  --color-info: #175a8a;
  --color-info-bg: #e7f3fb;

  /* Typography — "PingFang SC"/"Microsoft YaHei" cover the Mandarin admin */
  --font-sans: "Lato", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Helvetica, Arial,
    sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.375rem;
  --font-size-xl: 1.75rem;
  --font-size-2xl: 2.25rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(31, 41, 51, 0.08);
  --shadow-md: 0 4px 12px rgba(31, 41, 51, 0.1);
  --shadow-lg: 0 12px 28px rgba(31, 41, 51, 0.14);

  /* Motion */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ==========================================================================
   Shared button system
   ========================================================================== */

.btn,
.btn-primary,
.btn-secondary,
.btn-ghost,
.btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.65rem 1.4rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--transition-fast),
    color var(--transition-fast), border-color var(--transition-fast),
    box-shadow var(--transition-fast), transform var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background-color: var(--color-primary-dark);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background-color: var(--color-accent);
  color: #fff;
}
.btn-secondary:hover {
  background-color: var(--color-primary);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-ghost:hover {
  background-color: var(--color-primary);
  color: #fff;
}

.btn-danger {
  background-color: var(--color-error);
  color: #fff;
}
.btn-danger:hover {
  background-color: #a01f1f;
}

/* ==========================================================================
   Skeleton loaders
   Usage:
     <div class="skeleton skeleton-text"></div>   — shimmering placeholder
     <div class="img-skeleton"><img …></div>      — shimmer behind an image
       (script.js/admin.js add .loaded when the image finishes loading)
   ========================================================================== */

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

.skeleton {
  position: relative;
  overflow: hidden;
  background: linear-gradient(
    90deg,
    #eef1f4 25%,
    #f7f8fa 50%,
    #eef1f4 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s ease-in-out infinite;
  border-radius: var(--radius-sm);
  color: transparent !important;
  user-select: none;
}

.skeleton-text {
  height: 1em;
  margin: 0.35em 0;
}

.skeleton-title {
  height: 1.6em;
  width: 60%;
  margin: 0.5em 0;
}

.skeleton-block {
  min-height: 120px;
}

/* Image skeleton: the wrapper shimmers until the image is loaded */
.img-skeleton {
  position: relative;
  overflow: hidden;
  background: linear-gradient(
    90deg,
    #eef1f4 25%,
    #f7f8fa 50%,
    #eef1f4 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.4s ease-in-out infinite;
}

.img-skeleton img {
  opacity: 0;
}

.img-skeleton.loaded {
  animation: none;
  background: none;
}

/* Instant reveal once loaded — a transition here can be interrupted by
   lazy-load/cache timing and leave images stuck invisible. */
.img-skeleton.loaded img {
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .skeleton,
  .img-skeleton {
    animation: none;
  }
  .btn,
  .btn-primary,
  .btn-secondary,
  .btn-ghost,
  .btn-danger {
    transition: none;
  }
}