/* UKMA — INTERACTIVE: calculator, social, footer icons, lazy-load */

/* ============================================================
   v3 — Calculator, Social cards, Spec strikethrough, Footer icons
   ============================================================ */

/* ── Spec diff: strikethrough + new value ──────────────────── */
.spec-val-wrap {
  display: flex;
  flex-direction: column;
  gap: .15rem;
}
.spec-val--old {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--danger);
  text-decoration: line-through;
  opacity: .7;
  line-height: 1;
}
.spec-val--new {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: #00CC66;
  line-height: 1;
  animation: spec-pop .35s var(--ease-out);
}
@keyframes spec-pop {
  0%   { transform: scale(0.8); opacity: 0; }
  60%  { transform: scale(1.05); }
  100% { transform: scale(1); opacity: 1; }
}
.spec-item--changed {
  border-color: rgba(0,204,102,0.3);
  background: rgba(0,204,102,0.04);
}

/* ── Calculator section ────────────────────────────────────── */
.calc-grid {
  display: grid;
  gap: 2rem;
  margin-bottom: 2.5rem;
}
@media (min-width: 900px) {
  .calc-grid { grid-template-columns: 1fr 1fr; }
}

.calc-controls {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.calc-row { display: flex; flex-direction: column; gap: .5rem; }

.calc-label {
  font-family: var(--font-mono);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-secondary);
}

.calc-slider-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.calc-slider {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 8px rgba(0,163,255,0.5);
  cursor: pointer;
  transition: transform var(--t-fast), box-shadow var(--t-fast);
}
.calc-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 16px rgba(0,163,255,0.7);
}
.calc-slider::-moz-range-thumb {
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--blue);
  border: none;
  cursor: pointer;
}

.calc-slider-val {
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--blue);
  white-space: nowrap;
  min-width: 80px;
  text-align: right;
}

.calc-compare-btns {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}
.calc-cmp-btn {
  flex: 1;
  padding: .55rem 1rem;
  font-family: var(--font-display);
  font-size: .85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  background: transparent;
  cursor: pointer;
  transition: all var(--t-fast);
}
.calc-cmp-btn.active, .calc-cmp-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
  background: rgba(0,163,255,0.08);
}

/* Results cards */
.calc-results {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.calc-result-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  transition: border-color var(--t-med);
}
.calc-result--elec { border-color: rgba(0,163,255,0.25); }
.calc-result--gas  { border-color: rgba(255,59,59,0.2); }
.calc-result--save {
  border-color: rgba(0,204,102,0.3);
  background: rgba(0,204,102,0.04);
}

.calc-result-label {
  font-family: var(--font-mono);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-secondary);
  margin-bottom: .4rem;
}
.calc-result-val {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
}
.calc-result-sub {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--text-secondary);
  margin-top: .35rem;
}

/* Comparison bars */
.calc-bars {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 0;
}

.calc-bar-row {
  display: grid;
  grid-template-columns: 80px 1fr 80px;
  align-items: center;
  gap: 1rem;
}

.calc-bar-label {
  font-family: var(--font-mono);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-secondary);
  white-space: nowrap;
}

.calc-bar-track {
  height: 12px;
  background: rgba(255,255,255,0.05);
  border-radius: 6px;
  overflow: hidden;
}

.calc-bar {
  height: 100%;
  border-radius: 6px;
  transition: width .5s var(--ease-out);
  min-width: 4px;
}
.calc-bar--elec { background: linear-gradient(90deg, #0066CC, var(--blue)); }
.calc-bar--gas  { background: linear-gradient(90deg, #CC2200, #FF5533); }

.calc-bar-num {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--text-secondary);
  white-space: nowrap;
  text-align: right;
}

/* ── Social cards grid ─────────────────────────────────────── */
.social-posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
@media (min-width: 600px) {
  .social-posts-grid { grid-template-columns: repeat(5, 1fr); }
}
@media (max-width: 480px) {
  .social-posts-grid { grid-template-columns: repeat(2, 1fr); }
}

.social-card {
  position: relative;
  aspect-ratio: 9/16;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none;
  transition: transform var(--t-med) var(--ease-out), box-shadow var(--t-med);
  cursor: pointer;
}
.social-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 20px 50px rgba(0,0,0,0.6);
}

.social-card-bg {
  position: absolute;
  inset: 0;
  transition: transform var(--t-slow) var(--ease-out);
}
.social-card:hover .social-card-bg { transform: scale(1.06); }

.social-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.1) 50%, transparent 100%);
}

.social-card--tiktok  .social-card-overlay { background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(60,0,80,0.2) 60%, transparent 100%); }
.social-card--instagram .social-card-overlay { background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, rgba(80,20,0,0.15) 60%, transparent 100%); }

.social-card-platform-icon {
  position: absolute;
  top: .75rem;
  left: .75rem;
  z-index: 2;
  opacity: .9;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.5));
  transition: opacity var(--t-fast);
}
.social-card--tiktok .social-card-platform-icon { color: #fff; }
.social-card--instagram .social-card-platform-icon {
  color: #fff;
  /* Instagram gradient via filter trickery */
  filter: drop-shadow(0 0 6px rgba(200,60,100,0.6));
}

.social-card-play {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 40px; height: 40px;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(4px);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  color: #fff;
  z-index: 2;
  opacity: 0;
  transition: opacity var(--t-fast);
}
.social-card:hover .social-card-play { opacity: 1; }

.social-card-footer {
  position: relative;
  z-index: 2;
  padding: .75rem;
  margin-top: auto;
}
.social-card-handle {
  font-family: var(--font-mono);
  font-size: .65rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: .2rem;
}
.social-card-caption {
  font-family: var(--font-body);
  font-size: .75rem;
  font-weight: 500;
  color: #fff;
  line-height: 1.3;
}

/* Follow buttons row */
.social-follow-row {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  justify-content: center;
}
.social-follow-btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .65rem 1.25rem;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: .9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  text-decoration: none;
  transition: all var(--t-med) var(--ease-out);
  border: 1.5px solid transparent;
}
.social-follow-btn--tiktok {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.12);
  color: var(--text-primary);
}
.social-follow-btn--tiktok:hover {
  background: #1a1a1a;
  border-color: rgba(255,255,255,0.4);
  transform: translateY(-2px);
}
.social-follow-btn--instagram {
  background: rgba(200,60,100,0.08);
  border-color: rgba(200,60,100,0.25);
  color: #e05580;
}
.social-follow-btn--instagram:hover {
  background: rgba(200,60,100,0.15);
  border-color: rgba(200,60,100,0.5);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(200,60,100,0.2);
}
.social-follow-btn--telegram {
  background: rgba(0,163,255,0.08);
  border-color: rgba(0,163,255,0.25);
  color: var(--blue);
}
.social-follow-btn--telegram:hover {
  background: rgba(0,163,255,0.15);
  border-color: var(--blue);
  transform: translateY(-2px);
  box-shadow: 0 0 20px var(--blue-glow);
}

/* ── Footer contact with icons ──────────────────────────────── */
.footer-contact-link {
  display: flex;
  flex-direction: row;        /* icon + text строго в ряд */
  align-items: center;        /* вертикальне центрування */
  gap: .55rem;
  font-size: .875rem;
  color: var(--text-secondary);
  padding: .35rem 0;
  text-decoration: none;
  transition: color var(--t-fast), padding-left var(--t-med) var(--ease-out);
}
.footer-contact-link:hover { color: var(--blue); padding-left: .4rem; }

.footer-contact-icon {
  width: 26px; height: 26px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: .7rem;
}
.footer-contact-icon--tg      { background: rgba(0,163,255,0.12); color: var(--blue); }
.footer-contact-icon--ig      { background: rgba(200,60,100,0.12); color: #e05580; }
.footer-contact-icon--tt      { background: rgba(255,255,255,0.07); color: var(--text-primary); }
.footer-contact-icon--email   { background: rgba(255,214,0,0.1); color: var(--accent-yellow); }

/* ============================================================
   Lazy Load + Image Cache styles
   ============================================================ */

/* Placeholder while image loads — matches dark card bg */
img[data-src],
.card-img-lazy {
  background: var(--bg-section);
  min-height: 1px;
}

/* Fade in when lazy image is swapped */
.lazy-loaded {
  animation: img-fadein .4s ease both;
}
@keyframes img-fadein {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Skeleton shimmer for card image while waiting */
.card-img-wrap img[data-src] {
  background: linear-gradient(
    90deg,
    var(--bg-card) 0%,
    var(--bg-card-hover) 50%,
    var(--bg-card) 100%
  );
  background-size: 200% 100%;
  animation: img-shimmer 1.4s ease-in-out infinite;
  /* DO NOT set object-fit:none — breaks layout on mobile */
}
@keyframes img-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
/* Stop shimmer once loaded */
.card-img-wrap img.lazy-loaded {
  animation: img-fadein .35s ease both;
  object-fit: contain;
}