/* ============================================================
   css/components/card.css
   Zolto v8.1.0 — Card & Card Group Components
   ============================================================
   Purpose:
   - .zolto-card       — base card container and all variants
   - .zolto-card-group — responsive grid wrapper for cards
   - Variant modifiers: outline, primary, success, warning,
     danger, glass, ghost, elevated
   - Interactive card (link) states
   - Card header, body, footer sub-regions
   - All values via CSS custom properties from variables.css
   ============================================================ */


/* ─────────────────────────────────────────────────────────────
   1. Card Base
   ───────────────────────────────────────────────────────────── */

.zolto-card {
  display:        flex;
  flex-direction: column;
  background:     var(--card-bg);
  border:         1px solid var(--card-border);
  border-radius:  var(--card-radius);
  padding:        var(--card-padding);
  box-shadow:     var(--card-shadow);
  overflow:       hidden;
  position:       relative;
  transition:     background   var(--duration-normal) var(--ease-out),
                  border-color var(--duration-normal) var(--ease-out),
                  box-shadow   var(--duration-normal) var(--ease-out),
                  transform    var(--duration-normal) var(--ease-out);
}


/* ─────────────────────────────────────────────────────────────
   2. Interactive Card (anchor element)
   ───────────────────────────────────────────────────────────── */

a.zolto-card {
  text-decoration: none;
  color:           inherit;
  cursor:          pointer;
}

a.zolto-card:hover {
  background:   var(--card-hover-bg);
  box-shadow:   var(--card-hover-shadow);
  transform:    translateY(-2px);
  border-color: var(--border-normal);
}

a.zolto-card:active {
  transform: translateY(0);
}


/* ─────────────────────────────────────────────────────────────
   3. Card Sub-Regions
   ───────────────────────────────────────────────────────────── */

/* Header — icon + title row */
.zolto-card-header {
  display:       flex;
  align-items:   flex-start;
  gap:           var(--space-3);
  margin-bottom: var(--space-3);
  flex-shrink:   0;
}

.zolto-card-icon {
  font-size:   1.5em;
  flex-shrink: 0;
  line-height: 1;
  margin-top:  0.05em;
}

.zolto-card-title {
  font-size:     var(--text-md);
  font-weight:   var(--weight-semibold);
  color:         var(--card-title-text);
  line-height:   var(--leading-snug);
  flex:          1;
  min-width:     0;
}

/* Body — scrollable if needed */
.zolto-card-body {
  flex:      1;
  min-width: 0;
  font-size: var(--text-base);
  color:     var(--card-body-text);
}

.zolto-card-body > *:first-child { margin-top: 0;    }
.zolto-card-body > *:last-child  { margin-bottom: 0; }

/* Footer — actions row */
.zolto-card-footer {
  display:     flex;
  align-items: center;
  gap:         var(--space-2);
  margin-top:  var(--space-4);
  padding-top: var(--space-3);
  border-top:  1px solid var(--border-faint);
  flex-shrink: 0;
}

/* Divider between header and body */
.zolto-card-divider {
  height:     1px;
  background: var(--border-faint);
  margin:     var(--space-3) calc(-1 * var(--card-padding));
}

/* Image region — full bleed above padding */
.zolto-card-image {
  margin:         calc(-1 * var(--card-padding))
                  calc(-1 * var(--card-padding))
                  var(--card-padding);
  overflow:       hidden;
  border-radius:  var(--card-radius) var(--card-radius) 0 0;
}

.zolto-card-image img {
  width:   100%;
  height:  auto;
  display: block;
}

/* Badge — top-right absolute corner badge */
.zolto-card-badge {
  position:      absolute;
  top:           var(--space-3);
  right:         var(--space-3);
  font-size:     var(--text-xs);
  font-weight:   var(--weight-semibold);
  padding:       0.2em 0.55em;
  border-radius: var(--radius-full);
  background:    var(--accent-primary-subtle);
  color:         var(--accent-primary);
  border:        1px solid var(--accent-primary-border);
  pointer-events: none;
  user-select:   none;
}


/* ─────────────────────────────────────────────────────────────
   4. Card Variants
   ───────────────────────────────────────────────────────────── */

/* Outline — border only, transparent background */
.zolto-card-outline {
  background: transparent;
  border:     1px solid var(--border-normal);
  box-shadow: none;
}

.zolto-card-outline:hover {
  background:   var(--bg-surface);
  border-color: var(--border-heavy);
}

/* Elevated — deeper shadow, no border */
.zolto-card-elevated {
  border:     none;
  box-shadow: var(--shadow-lg);
}

.zolto-card-elevated:hover {
  box-shadow: var(--shadow-xl);
  transform:  translateY(-3px);
}

/* Ghost — fully transparent, no border */
.zolto-card-ghost {
  background: transparent;
  border:     none;
  box-shadow: none;
  padding:    0;
}

/* Glass — frosted blur effect */
.zolto-card-glass {
  background:            var(--surface-glass);
  backdrop-filter:       blur(var(--surface-glass-blur));
  -webkit-backdrop-filter: blur(var(--surface-glass-blur));
  border:                1px solid var(--border-subtle);
  box-shadow:            var(--shadow-md);
}

/* Intent variants */
.zolto-card-primary {
  background:   var(--intent-primary-bg);
  border-color: var(--intent-primary-border);
}
.zolto-card-primary .zolto-card-title { color: var(--intent-primary-text); }

.zolto-card-success {
  background:   var(--intent-success-bg);
  border-color: var(--intent-success-border);
}
.zolto-card-success .zolto-card-title { color: var(--intent-success-text); }

.zolto-card-warning {
  background:   var(--intent-warning-bg);
  border-color: var(--intent-warning-border);
}
.zolto-card-warning .zolto-card-title { color: var(--intent-warning-text); }

.zolto-card-danger {
  background:   var(--intent-danger-bg);
  border-color: var(--intent-danger-border);
}
.zolto-card-danger .zolto-card-title { color: var(--intent-danger-text); }

.zolto-card-info {
  background:   var(--intent-info-bg);
  border-color: var(--intent-info-border);
}
.zolto-card-info .zolto-card-title { color: var(--intent-info-text); }


/* ─────────────────────────────────────────────────────────────
   5. Card Size Modifiers
   ───────────────────────────────────────────────────────────── */

.zolto-card-sm {
  padding:       var(--space-3);
  border-radius: var(--radius-md);
}
.zolto-card-sm .zolto-card-title { font-size: var(--text-sm); }

.zolto-card-lg {
  padding:       var(--space-7);
  border-radius: var(--radius-xl);
}
.zolto-card-lg .zolto-card-title { font-size: var(--text-xl); }


/* ─────────────────────────────────────────────────────────────
   6. Card Group
   ───────────────────────────────────────────────────────────── */

.zolto-card-group {
  display:               grid;
  grid-template-columns: repeat(var(--card-group-cols, 3), minmax(0, 1fr));
  gap:                   var(--space-4);
  margin-bottom:         var(--prose-block-gap);
}

/* Column count presets */
.zolto-card-group-1 { --card-group-cols: 1; }
.zolto-card-group-2 { --card-group-cols: 2; }
.zolto-card-group-3 { --card-group-cols: 3; }
.zolto-card-group-4 { --card-group-cols: 4; }

/* Auto-fill: adapts number of columns to container width */
.zolto-card-group-auto {
  grid-template-columns: repeat(
    auto-fill,
    minmax(min(240px, 100%), 1fr)
  );
}

/* Masonry-style layout (CSS columns fallback) */
.zolto-card-group-masonry {
  display:       block;
  column-count:  var(--card-group-cols, 3);
  column-gap:    var(--space-4);
}

.zolto-card-group-masonry .zolto-card {
  break-inside:  avoid;
  margin-bottom: var(--space-4);
}


/* ─────────────────────────────────────────────────────────────
   7. Animation Classes (applied by component-renderer.js)
   ───────────────────────────────────────────────────────────── */

/* Base animation class — GPU-only properties */
@keyframes zolto-fadeSlideUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0);    }
}

@keyframes zolto-fadeSlideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0);     }
}

@keyframes zolto-fadeSlideLeft {
  from { opacity: 0; transform: translateX(10px); }
  to   { opacity: 1; transform: translateX(0);    }
}

@keyframes zolto-fadeSlideRight {
  from { opacity: 0; transform: translateX(-10px); }
  to   { opacity: 1; transform: translateX(0);     }
}

@keyframes zolto-fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes zolto-scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1);    }
}

@keyframes zolto-popIn {
  0%   { opacity: 0; transform: scale(0.85); }
  65%  { transform: scale(1.04);              }
  100% { opacity: 1; transform: scale(1);    }
}

@keyframes zolto-bounceIn {
  0%   { opacity: 0; transform: scale(0.7) translateY(20px); }
  60%  { opacity: 1; transform: scale(1.05) translateY(-4px); }
  80%  { transform: scale(0.97) translateY(2px); }
  100% { transform: scale(1) translateY(0); }
}

@keyframes zolto-slideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0);    }
}

@keyframes zolto-flipIn {
  from { opacity: 0; transform: perspective(400px) rotateX(-20deg); }
  to   { opacity: 1; transform: perspective(400px) rotateX(0deg);   }
}

/* Animation utility classes */
.zolto-anim-fadeIn         { animation: zolto-fadeIn         var(--duration-normal) var(--ease-out) both; }
.zolto-anim-fadeSlideUp    { animation: zolto-fadeSlideUp    var(--duration-normal) var(--ease-out) both; }
.zolto-anim-fadeSlideDown  { animation: zolto-fadeSlideDown  var(--duration-normal) var(--ease-out) both; }
.zolto-anim-fadeSlideLeft  { animation: zolto-fadeSlideLeft  var(--duration-normal) var(--ease-out) both; }
.zolto-anim-fadeSlideRight { animation: zolto-fadeSlideRight var(--duration-normal) var(--ease-out) both; }
.zolto-anim-scaleIn        { animation: zolto-scaleIn        var(--duration-normal) var(--ease-spring) both; }
.zolto-anim-popIn          { animation: zolto-popIn          var(--duration-slow)   var(--ease-spring) both; }
.zolto-anim-bounceIn       { animation: zolto-bounceIn       var(--duration-slower) var(--ease-out) both; }
.zolto-anim-slideUp        { animation: zolto-slideUp        var(--duration-slow)   var(--ease-out) both; }
.zolto-anim-flipIn         { animation: zolto-flipIn         var(--duration-slow)   var(--ease-out) both; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .zolto-anim-fadeIn,
  .zolto-anim-fadeSlideUp,
  .zolto-anim-fadeSlideDown,
  .zolto-anim-fadeSlideLeft,
  .zolto-anim-fadeSlideRight,
  .zolto-anim-scaleIn,
  .zolto-anim-popIn,
  .zolto-anim-bounceIn,
  .zolto-anim-slideUp,
  .zolto-anim-flipIn {
    animation: none;
    opacity:   1;
    transform: none;
  }
}


/* ─────────────────────────────────────────────────────────────
   8. Stat Card (common pattern used in dashboards)
   ───────────────────────────────────────────────────────────── */

.zolto-stat-card {
  display:        flex;
  flex-direction: column;
  gap:            var(--space-1);
}

.zolto-stat-label {
  font-size:      var(--text-xs);
  font-weight:    var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color:          var(--text-faint);
}

.zolto-stat-value {
  font-size:       var(--heading-1);
  font-weight:     var(--weight-bold);
  color:           var(--text-heading);
  line-height:     var(--leading-none);
  letter-spacing:  var(--tracking-tight);
  font-variant-numeric: tabular-nums;
}

.zolto-stat-delta {
  display:     flex;
  align-items: center;
  gap:         var(--space-1);
  font-size:   var(--text-sm);
  font-weight: var(--weight-medium);
}

.zolto-stat-delta.up   { color: var(--intent-success); }
.zolto-stat-delta.down { color: var(--intent-danger);  }
.zolto-stat-delta.flat { color: var(--text-faint);     }

.zolto-stat-description {
  font-size: var(--text-sm);
  color:     var(--text-mute);
}


/* ─────────────────────────────────────────────────────────────
   9. Feature Card (icon + title + description pattern)
   ───────────────────────────────────────────────────────────── */

.zolto-feature-card {
  display:        flex;
  flex-direction: column;
  gap:            var(--space-3);
}

.zolto-feature-icon-wrap {
  display:         flex;
  align-items:     center;
  justify-content: center;
  width:           44px;
  height:          44px;
  border-radius:   var(--radius-md);
  background:      var(--accent-primary-subtle);
  border:          1px solid var(--accent-primary-border);
  font-size:       1.35em;
  flex-shrink:     0;
}

.zolto-feature-title {
  font-size:   var(--text-md);
  font-weight: var(--weight-semibold);
  color:       var(--text-heading);
  line-height: var(--leading-snug);
}

.zolto-feature-desc {
  font-size:   var(--text-sm);
  color:       var(--text-mute);
  line-height: var(--leading-relaxed);
  flex:        1;
}


/* ─────────────────────────────────────────────────────────────
   10. Responsive
   ───────────────────────────────────────────────────────────── */

@media (max-width: 1024px) {
  .zolto-card-group-4 { --card-group-cols: 3; }
}

@media (max-width: 768px) {
  .zolto-card-group-3,
  .zolto-card-group-4 { --card-group-cols: 2; }

  .zolto-card-group-masonry {
    column-count: 2;
  }
}

@media (max-width: 480px) {
  .zolto-card-group,
  .zolto-card-group-2,
  .zolto-card-group-3,
  .zolto-card-group-4 {
    grid-template-columns: 1fr;
  }

  .zolto-card-group-masonry {
    column-count: 1;
  }

  .zolto-stat-value {
    font-size: var(--heading-2);
  }
}