/* ── Wavecast Utility Shortcodes ──────────────────────────────────────────
   Dark-mode aware, minimal-JS, accessible. Prefix: wvc-
   ─────────────────────────────────────────────────────────────────────── */

/* ── Design tokens ── */
:root {
  --wvc-note: #0ea5e9;
  --wvc-note-bg: #f0f9ff;
  --wvc-tip: #22c55e;
  --wvc-tip-bg: #f0fdf4;
  --wvc-warning: #f59e0b;
  --wvc-warning-bg: #fffbeb;
  --wvc-danger: #ef4444;
  --wvc-danger-bg: #fef2f2;
  --wvc-primary: #4f46e5;
  --wvc-primary-hover: #4338ca;
  --wvc-secondary: #6b7280;
  --wvc-secondary-hover: #4b5563;
  --wvc-outline-border: #d1d5db;
  --wvc-outline-hover-bg: #f3f4f6;
  --wvc-tab-border: #d1d5db;
  --wvc-tab-active-border: #4f46e5;
  --wvc-tab-active-text: #4f46e5;
  --wvc-radius: 0.5rem;
}

[data-theme="dark"] {
  --wvc-note-bg: #0c2d48;
  --wvc-tip-bg: #0a2e1a;
  --wvc-warning-bg: #2e2200;
  --wvc-danger-bg: #3b0a0a;
  --wvc-outline-border: #4b5563;
  --wvc-outline-hover-bg: #1f2937;
  --wvc-tab-border: #4b5563;
  --wvc-tab-active-border: #818cf8;
  --wvc-tab-active-text: #a5b4fc;
  --wvc-primary: #6366f1;
  --wvc-primary-hover: #818cf8;
  --wvc-secondary: #9ca3af;
  --wvc-secondary-hover: #d1d5db;
}

/* ── Admonition ── */
.wvc-admonition {
  border-left: 4px solid;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--wvc-radius) var(--wvc-radius) 0;
  font-size: 0.95rem;
  line-height: 1.65;
}
.wvc-admonition--note  { border-color: var(--wvc-note);   background: var(--wvc-note-bg);   }
.wvc-admonition--tip   { border-color: var(--wvc-tip);    background: var(--wvc-tip-bg);    }
.wvc-admonition--warning { border-color: var(--wvc-warning); background: var(--wvc-warning-bg); }
.wvc-admonition--danger { border-color: var(--wvc-danger);  background: var(--wvc-danger-bg);  }

.wvc-admonition__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}
.wvc-admonition__icon {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.wvc-admonition--note  .wvc-admonition__icon { color: var(--wvc-note);   }
.wvc-admonition--tip   .wvc-admonition__icon { color: var(--wvc-tip);    }
.wvc-admonition--warning .wvc-admonition__icon { color: var(--wvc-warning); }
.wvc-admonition--danger .wvc-admonition__icon { color: var(--wvc-danger);  }

.wvc-admonition__title {
  font-weight: 700;
  font-size: 0.95rem;
}
.wvc-admonition__content > :first-child { margin-top: 0; }
.wvc-admonition__content > :last-child  { margin-bottom: 0; }
.wvc-admonition__content p { margin: 0.4rem 0; }

/* ── Button ── */
.wvc-button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--wvc-radius);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  line-height: 1.4;
}
.wvc-button--primary {
  background: var(--wvc-primary);
  color: #fff;
}
.wvc-button--primary:hover { background: var(--wvc-primary-hover); color: #fff; }

.wvc-button--secondary {
  background: var(--wvc-secondary);
  color: #fff;
}
.wvc-button--secondary:hover { background: var(--wvc-secondary-hover); color: #fff; }

.wvc-button--outline {
  background: transparent;
  color: var(--wvc-primary);
  border-color: var(--wvc-outline-border);
}
.wvc-button--outline:hover { background: var(--wvc-outline-hover-bg); color: var(--wvc-primary-hover); }

.wvc-button:focus-visible {
  outline: 2px solid var(--wvc-primary);
  outline-offset: 2px;
}
.wvc-button--primary:focus-visible {
  outline-color: var(--wvc-primary-hover);
  box-shadow: 0 0 0 2px rgba(79,70,229,0.35);
}
.wvc-button--secondary:focus-visible {
  outline-color: var(--wvc-secondary-hover);
}

.wvc-button__icon { font-size: 1.1rem; line-height: 1; }

/* ── Figure ── */
.wvc-figure {
  margin: 1.5rem 0;
  text-align: center;
}
.wvc-figure img {
  max-width: 100%;
  height: auto;
  border-radius: var(--wvc-radius);
  display: block;
  margin: 0 auto;
}
.wvc-figure__caption,
.wvc-video__caption {
  margin-top: 0.6rem;
  font-size: 0.88rem;
  color: #6b7280;
  font-style: italic;
}
[data-theme="dark"] .wvc-figure__caption,
[data-theme="dark"] .wvc-video__caption { color: #9ca3af; }

/* ── Video ── */
.wvc-video {
  margin: 1.5rem 0;
  text-align: center;
}
.wvc-video video {
  max-width: 100%;
  height: auto;
  border-radius: var(--wvc-radius);
  display: block;
  margin: 0 auto;
}

/* ── Gallery ── */
.wvc-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
  margin: 1.5rem 0;
}
.wvc-gallery a { display: block; }
.wvc-gallery img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--wvc-radius);
  display: block;
  transition: transform 0.2s, box-shadow 0.2s;
}
.wvc-gallery img:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* ── Lightbox (CSS-only, triggered by :target) ── */
.wvc-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.85);
  align-items: center;
  justify-content: center;
}
.wvc-lightbox:target {
  display: flex;
}
.wvc-lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--wvc-radius);
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.wvc-lightbox__close {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  color: #fff;
  font-size: 2rem;
  text-decoration: none;
  line-height: 1;
  opacity: 0.8;
}
.wvc-lightbox__close:hover { opacity: 1; }

/* ── Carousel ── */
.wvc-carousel {
  position: relative;
  margin: 1.5rem 0;
  --wvc-carousel-gap: 0.75rem;
}
.wvc-carousel__slides {
  display: flex;
  gap: var(--wvc-carousel-gap);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  border-radius: var(--wvc-radius);
}
.wvc-carousel__slides > * {
  scroll-snap-align: start;
  flex: 0 0 calc(100% - var(--wvc-carousel-gap));
  min-width: 0;
}
.wvc-carousel__slides img {
  width: 100%;
  height: auto;
  border-radius: var(--wvc-radius);
  display: block;
}
.wvc-carousel__prev,
.wvc-carousel__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 2;
  background: rgba(0,0,0,0.5);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: background 0.2s;
  padding: 0;
}
.wvc-carousel__prev:hover,
.wvc-carousel__next:hover { background: rgba(0,0,0,0.75); }
.wvc-carousel__prev { left: 0.5rem; }
.wvc-carousel__next { right: 0.5rem; }

/* ── Tabs ── */
.wvc-tabs {
  margin: 1.5rem 0;
  position: relative;  /* containing block for clipped radio inputs */
}
.wvc-tabs__labels {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 2px solid var(--wvc-tab-border);
  margin-bottom: 1rem;
  gap: 0;
}
.wvc-tabs__label {
  display: inline-block;
  padding: 0.55rem 1.15rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: inherit;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
  user-select: none;
}
.wvc-tabs__label:hover { color: var(--wvc-tab-active-text); }

/* Visually-hidden radio inputs — still focusable for keyboard navigation */
.wvc-tabs input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Focus indicator: highlight corresponding label when radio receives keyboard focus */
.wvc-tabs input[type="radio"]:nth-of-type(1):focus-visible ~ .wvc-tabs__labels label:nth-of-type(1),
.wvc-tabs input[type="radio"]:nth-of-type(2):focus-visible ~ .wvc-tabs__labels label:nth-of-type(2),
.wvc-tabs input[type="radio"]:nth-of-type(3):focus-visible ~ .wvc-tabs__labels label:nth-of-type(3),
.wvc-tabs input[type="radio"]:nth-of-type(4):focus-visible ~ .wvc-tabs__labels label:nth-of-type(4),
.wvc-tabs input[type="radio"]:nth-of-type(5):focus-visible ~ .wvc-tabs__labels label:nth-of-type(5) {
  outline: 2px solid var(--wvc-tab-active-border);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Show panel whose radio is checked (overrides [hidden] attribute) */
.wvc-tabs input[type="radio"]:nth-of-type(1):checked ~ .wvc-tabs__panels .wvc-tabs__panel:nth-of-type(1),
.wvc-tabs input[type="radio"]:nth-of-type(2):checked ~ .wvc-tabs__panels .wvc-tabs__panel:nth-of-type(2),
.wvc-tabs input[type="radio"]:nth-of-type(3):checked ~ .wvc-tabs__panels .wvc-tabs__panel:nth-of-type(3),
.wvc-tabs input[type="radio"]:nth-of-type(4):checked ~ .wvc-tabs__panels .wvc-tabs__panel:nth-of-type(4),
.wvc-tabs input[type="radio"]:nth-of-type(5):checked ~ .wvc-tabs__panels .wvc-tabs__panel:nth-of-type(5) {
  display: block;
}

/* Active label style */
.wvc-tabs input[type="radio"]:nth-of-type(1):checked ~ .wvc-tabs__labels label:nth-of-type(1),
.wvc-tabs input[type="radio"]:nth-of-type(2):checked ~ .wvc-tabs__labels label:nth-of-type(2),
.wvc-tabs input[type="radio"]:nth-of-type(3):checked ~ .wvc-tabs__labels label:nth-of-type(3),
.wvc-tabs input[type="radio"]:nth-of-type(4):checked ~ .wvc-tabs__labels label:nth-of-type(4),
.wvc-tabs input[type="radio"]:nth-of-type(5):checked ~ .wvc-tabs__labels label:nth-of-type(5) {
  border-bottom-color: var(--wvc-tab-active-border);
  color: var(--wvc-tab-active-text);
}

.wvc-tabs__panel {
  display: none;
  padding: 0.5rem 0;
}
.wvc-tabs__panel > :first-child { margin-top: 0; }
.wvc-tabs__panel > :last-child  { margin-bottom: 0; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .wvc-gallery { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .wvc-gallery img { height: 140px; }
  .wvc-carousel__prev,
  .wvc-carousel__next { width: 2rem; height: 2rem; font-size: 1.2rem; }
  .wvc-carousel__prev { left: 0.25rem; }
  .wvc-carousel__next { right: 0.25rem; }
  .wvc-tabs__label { padding: 0.5rem 0.75rem; font-size: 0.82rem; }
}