/* ==========================================================================
   Чех Пласт — CSS на продуктовата страница (single-cp_system)
   Пренесен ЕДНО КЪМ ЕДНО от одобреното демо product-rehau-geneo (май 2026),
   без стилизиране на хедър/футър/база (те са в main.css). Зарежда се само на
   страници на системи. Наслоените блокове от демото са запазени нарочно:
   верността към одобрената визия е с приоритет пред подредбата. Поправка се
   прави в блока, който вече е там, не с нов блок отдолу.
   ========================================================================== */

.btn--sm { padding: 11px 18px; font-size: 12px; }

/* ======= PRODUCT HERO ======= */
.product-hero {
  position: relative;
  min-height: 520px; background: var(--bg);
  display: flex; align-items: stretch; overflow: hidden;
}
.product-hero-bg {
  position: absolute; inset: 0; z-index: 0;
  /* background-image идва от водещата снимка (inline в шаблона) */
  background-size: cover; background-position: center;
  filter: brightness(0.22) saturate(0.6);
}
.product-hero::after {
  content: ''; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(14,17,22,0.96) 0%, rgba(14,17,22,0.75) 55%, rgba(14,17,22,0.25) 100%),
    radial-gradient(60% 100% at 80% 50%, rgba(46,117,182,0.15) 0%, transparent 60%);
  pointer-events: none;
}
.hero-left {
  position: relative; z-index: 2;
  flex: 0 0 55%; display: flex; flex-direction: column;
  justify-content: center; padding: 72px 80px 72px var(--gutter);
}
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 500;
  letter-spacing: 0.10em; text-transform: uppercase; color: rgba(255,255,255,0.72);
  margin-bottom: 32px;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--border-2); }
.breadcrumb .current { color: #6BB6FF; }
.product-hero-tag {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: 'JetBrains Mono', monospace; font-size: 12px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase; color: #6BB6FF;
  margin-bottom: 20px;
}
.product-hero-tag::before { content: ''; display: block; width: 28px; height: 1px; background: var(--accent); }
.product-hero h1 {
  font-size: clamp(36px, 4vw, 52px); font-weight: 800;
  line-height: 1.05; letter-spacing: -0.025em; margin-bottom: 8px;
}
.product-hero-subtitle {
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent);
  margin-bottom: 22px;
}
.product-hero-desc {
  font-size: 16px; color: rgba(255,255,255,0.82); line-height: 1.7;
  max-width: 520px; margin-bottom: 40px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-right {
  position: relative; z-index: 2; flex: 1;
  display: flex; align-items: center; justify-content: center;
  padding: 40px 40px 40px 0;
}
.hero-window-wrap {
  position: relative; width: 100%; max-width: 480px; height: 420px;
}
.hero-window-ph {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, #1a2030 0%, #252d3a 50%, #1e2530 100%);
  border: 1px solid var(--border);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
/* SVG Window illustration placeholder */
.window-svg-ph {
  position: absolute; inset: 20px;
  border: 3px solid rgba(46,117,182,0.3);
  display: flex; align-items: center; justify-content: center;
}
.window-svg-ph::before {
  content: '';
  position: absolute; top: 50%; left: 0; right: 0;
  height: 3px; background: rgba(46,117,182,0.2);
}
.window-svg-ph::after {
  content: '';
  position: absolute; left: 50%; top: 0; bottom: 0;
  width: 3px; background: rgba(46,117,182,0.2);
}
.window-glass {
  position: absolute; inset: 24px;
  background: linear-gradient(135deg, rgba(46,117,182,0.08) 0%, rgba(100,160,220,0.05) 50%, rgba(46,117,182,0.12) 100%);
  display: flex; align-items: center; justify-content: center;
}
.window-glass-inner {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-mute);
  text-align: center; line-height: 2;
}
.hero-window-badge {
  position: absolute; bottom: -14px; right: -14px;
  background: var(--accent); color: #fff; padding: 14px 20px;
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase;
  box-shadow: 0 8px 24px rgba(46,117,182,0.45);
}
.hero-window-badge strong { display: block; font-family: var(--font-head); font-size: 22px; font-weight: 800; letter-spacing: -0.02em; line-height: 1; margin-bottom: 3px; }
.hero-system-tag {
  position: absolute; top: 20px; left: 20px;
  background: rgba(14,17,22,0.85); border: 1px solid var(--border-2);
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-mute);
  padding: 6px 12px;
}
.hero-system-tag span { color: var(--accent); }

/* ======= SPECS BAND ======= */
.specs-band {
  background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 0;
}
.specs-band-inner {
  display: grid; grid-template-columns: repeat(6, 1fr);
}
.spec-cell {
  padding: 32px 28px; border-right: 1px solid var(--border);
  transition: background .2s;
}
.spec-cell:last-child { border-right: 0; }
.spec-cell:hover { background: var(--surface); }
.spec-ico {
  width: 40px; height: 40px;
  border: 1px solid var(--border-2);
  display: grid; place-items: center;
  color: var(--accent); margin-bottom: 14px;
}
.spec-val {
  font-family: var(--font-head); font-weight: 700;
  font-size: 26px; letter-spacing: -0.02em; color: var(--ink); line-height: 1;
}
.spec-val sup { font-size: 13px; color: var(--accent); top: -6px; position: relative; }
.spec-key {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-mute); margin-top: 6px;
}
.spec-detail { font-size: 12px; color: var(--ink-dim); margin-top: 4px; }

/* ======= ABOUT SYSTEM (benefits + cross section) ======= */
.about-system-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
}
.about-system-copy h2 {
  font-size: 36px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 20px;
  line-height: 1.1;
}
.about-system-copy h2 em { font-style: normal; color: var(--accent); }
.about-system-copy .lead {
  font-size: 16px; color: var(--ink-dim); line-height: 1.7; margin-bottom: 32px;
}
.benefit-list { display: flex; flex-direction: column; gap: 16px; margin-bottom: 36px; }
.benefit-item {
  display: flex; align-items: flex-start; gap: 14px; padding: 16px 18px;
  background: var(--surface); border: 1px solid var(--border); transition: border-color .2s;
}
.benefit-item:hover { border-color: var(--accent); }
.benefit-ico {
  width: 36px; height: 36px; flex-shrink: 0;
  border: 1px solid var(--border-2); display: grid; place-items: center; color: var(--accent);
}
.benefit-text .k { font-weight: 600; font-size: 14px; margin-bottom: 3px; }
.benefit-text .v { font-size: 13px; color: var(--ink-dim); line-height: 1.5; }

/* cross section placeholder */
.cross-section-wrap {
  position: relative; height: 520px;
}
.cross-section-ph {
  position: absolute; inset: 0;
  background: linear-gradient(160deg, #151B24 0%, #1E2530 60%, #252D3A 100%);
  border: 1px solid var(--border);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px;
}
.cross-ph-label {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-mute);
}
/* Simplified cross-section SVG drawing */
.cross-svg { opacity: 0.6; }
.cross-badge {
  position: absolute; top: 24px; right: 24px;
  background: var(--surface); border: 1px solid var(--accent);
  padding: 10px 16px;
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent);
}
.raufipro-tag {
  position: absolute; bottom: 24px; left: 24px; right: 24px;
  background: rgba(46,117,182,0.1); border: 1px solid rgba(46,117,182,0.3);
  padding: 14px 18px; display: flex; align-items: center; gap: 12px;
}
.raufipro-tag .ico-dot {
  width: 8px; height: 8px; background: var(--accent); border-radius: 50%; flex-shrink: 0;
}
.raufipro-tag .txt { font-size: 12px; color: var(--ink-dim); line-height: 1.5; }
.raufipro-tag .txt strong { color: var(--ink); }

/* ======= COLOR SWITCHER — light section ======= */
.color-section { background: var(--light-bg); border-top: 1px solid var(--light-border); border-bottom: 1px solid var(--light-border); }
.color-section .color-controls h2 { color: var(--light-ink); }
.color-section .color-controls .lead { color: var(--light-ink-dim); }
.color-section .color-group-label { color: var(--light-ink-mute); }
.color-section .color-swatch { border-color: var(--light-border); }
.color-section .color-swatch:hover, .color-section .color-swatch.active { border-color: var(--accent); }
.color-section .color-selected-info { background: var(--light-surface); border-color: var(--light-border); }
.color-section .selected-name { color: var(--light-ink); }
.color-section .selected-code { color: var(--light-ink-mute); }
.color-section p[style] { color: var(--light-ink-mute) !important; }
.color-section .section-label .num { color: var(--accent); }
.color-section .section-label .rule { background: var(--light-border-2); }
.color-section .section-label .tag { color: var(--light-ink-dim); }
/* Studio preview — clean neutral background, no photo */
.window-preview-wrap {
  position: relative; height: 480px;
  display: flex; align-items: center; justify-content: center;
}
.window-preview-bg {
  position: absolute; inset: 0;
  background: #F0F2F5;
  border: 1px solid var(--light-border);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.window-preview-bg::before {
  content: '';
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(60% 50% at 50% 40%, rgba(220,228,240,0.8) 0%, rgba(240,242,245,0.4) 60%, transparent 100%);
}
/* Subtle floor shadow line */
.window-preview-bg::after {
  content: '';
  position: absolute; bottom: 60px; left: 15%; right: 15%;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(180,190,205,0.4) 30%, rgba(180,190,205,0.4) 70%, transparent 100%);
}
.preview-window {
  position: relative; z-index: 2; width: 260px; height: 320px;
  /* Subtle drop shadow for product realism */
  filter: drop-shadow(0 8px 32px rgba(40,60,90,0.18)) drop-shadow(0 2px 8px rgba(40,60,90,0.10));
}
.preview-frame {
  position: absolute; inset: 0;
  border-width: 18px; border-style: solid; border-color: var(--window-color, #F1F0EA);
  transition: border-color .4s ease;
}
.preview-frame-inner {
  position: absolute; inset: 18px;
  /* Glass: subtle light blue with real reflection feel */
  background: linear-gradient(145deg,
    rgba(195,215,240,0.55) 0%,
    rgba(210,228,248,0.35) 30%,
    rgba(185,210,240,0.45) 60%,
    rgba(195,215,240,0.50) 100%);
  border: 1px solid rgba(255,255,255,0.6);
}
.preview-handle {
  position: absolute; right: -10px; top: 50%; transform: translateY(-50%);
  width: 8px; height: 60px; background: #8B9199;
  border-radius: 2px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}
.preview-mullion-h {
  position: absolute; left: 18px; right: 18px; top: 48%;
  height: 12px; background: var(--window-color, #F1F0EA);
  transition: background .4s ease;
}
.preview-mullion-v {
  position: absolute; top: 18px; bottom: 18px; left: 48%;
  width: 12px; background: var(--window-color, #F1F0EA);
  transition: background .4s ease;
}
.preview-reflection {
  position: absolute; inset: 20px;
  background: linear-gradient(145deg, rgba(255,255,255,0.35) 0%, rgba(255,255,255,0.08) 35%, transparent 60%);
  pointer-events: none;
}
.preview-tag {
  position: absolute; bottom: -28px; left: 50%; transform: translateX(-50%);
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--light-ink-mute);
  white-space: nowrap;
}

/* Color section layout (shared across light/dark) */
.color-section-inner {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 80px; align-items: start;
}
.color-controls h2 { font-size: 32px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 16px; }
.color-controls .lead { font-size: 15px; margin-bottom: 36px; line-height: 1.6; }
.color-groups { display: flex; flex-direction: column; gap: 28px; }
.color-group-label {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase;
  margin-bottom: 12px;
}
.swatch-row { display: flex; flex-wrap: wrap; gap: 10px; }
.color-swatch {
  width: 44px; height: 44px; border: 2px solid var(--light-border);
  cursor: pointer; transition: all .15s; position: relative;
  border-radius: 1px;
}
.color-swatch:hover, .color-swatch.active { border-color: var(--accent); transform: scale(1.08); }
.color-swatch.active::after {
  content: '✓'; position: absolute; inset: 0;
  display: grid; place-items: center; font-size: 14px; color: rgba(255,255,255,0.9);
  text-shadow: 0 1px 3px rgba(0,0,0,0.6);
}
.swatch-wood {
  background: repeating-linear-gradient(80deg, #8B6914 0px, #9A7520 4px, #7D5C10 8px, #8B6914 12px);
}
.color-selected-info {
  margin-top: 24px; padding: 16px 18px;
  background: var(--light-surface); border: 1px solid var(--light-border);
  display: flex; align-items: center; gap: 16px;
}
.selected-swatch { width: 48px; height: 48px; border: 1px solid var(--light-border-2); flex-shrink: 0; }
.selected-name { font-weight: 600; font-size: 15px; margin-bottom: 3px; color: var(--light-ink); }
.selected-code { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--light-ink-mute); letter-spacing: 0.1em; }

/* ======= OPENING TYPES — DARK section, light preview box ======= */
.opening-section {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.opening-section h2 { color: var(--ink); }
.opening-section p { color: var(--ink-dim); }
.opening-section .section-label .num { color: var(--accent); }
.opening-section .section-label .rule { background: var(--border-2); }
.opening-section .section-label .tag { color: var(--ink-dim); }
/* Left-side buttons — dark style */
.opening-btn {
  display: flex; align-items: center; gap: 16px;
  padding: 18px 20px;
  background: var(--surface); border: 1px solid var(--border);
  cursor: pointer; transition: all .2s; text-align: left;
}
.opening-btn:hover { border-color: var(--accent); background: var(--surface-2); }
.opening-btn.active {
  border-color: var(--accent);
  background: rgba(46,117,182,0.10);
  box-shadow: inset 3px 0 0 var(--accent);
}
.opening-btn-ico {
  width: 44px; height: 44px; flex-shrink: 0;
  border: 1px solid var(--border-2);
  display: grid; place-items: center; color: var(--ink-dim);
  transition: color .2s, border-color .2s;
}
.opening-btn.active .opening-btn-ico { color: var(--accent); border-color: var(--accent); }
.opening-btn-text .k { font-weight: 600; font-size: 15px; margin-bottom: 4px; color: var(--ink); }
.opening-btn-text .v { font-size: 12px; color: var(--ink-mute); line-height: 1.5; }

/* Opening preview with real image — double-class for higher specificity than base .opening-preview */
.opening-preview.opening-preview--img {
  position: relative;
  min-height: 400px; height: 100%;
  background: #ffffff;
  border: none;
  box-shadow: none;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  padding: 24px;
  box-sizing: border-box;
}
.opening-preview.opening-preview--img .opening-img {
  width: 100%; height: 100%;
  object-fit: contain; object-position: center;
  display: block;
  animation: fadeWindow .35s ease-out;
}
@keyframes fadeWindow {
  from { opacity: 0; transform: scale(0.97); }
  to   { opacity: 1; transform: scale(1); }
}
.opening-preview.opening-preview--img .opening-preview-label {
  position: absolute; top: 14px; left: 14px;
  background: rgba(255,255,255,0.92); border: 1px solid var(--light-border);
  color: var(--light-ink-mute);
  font-family: 'JetBrains Mono', monospace; font-size: 9px;
  letter-spacing: 0.13em; text-transform: uppercase;
  padding: 4px 10px;
  z-index: 2;
}
.opening-preview-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(65% 55% at 50% 38%, rgba(215,225,240,0.80) 0%, rgba(238,241,246,0.50) 60%, rgba(242,244,247,0.20) 100%);
}
/* Subtle floor line */
.opening-preview::after {
  content: '';
  position: absolute; bottom: 56px; left: 12%; right: 12%;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, rgba(160,175,195,0.35) 25%, rgba(160,175,195,0.35) 75%, transparent 100%);
}
.opening-preview-label {
  position: absolute; top: 14px; left: 14px;
  font-family: 'JetBrains Mono', monospace; font-size: 9px;
  letter-spacing: 0.13em; text-transform: uppercase; color: #8899AA;
  background: rgba(255,255,255,0.90); border: 1px solid rgba(200,210,225,0.8);
  padding: 4px 10px;
}

/* ---- Demo window: realistic product proportions ---- */
.demo-window {
  position: relative; width: 200px; height: 260px;
  transition: all .55s cubic-bezier(.22,.7,.22,1);
  filter:
    drop-shadow(0 16px 48px rgba(30,50,80,0.22))
    drop-shadow(0 4px 12px rgba(30,50,80,0.14))
    drop-shadow(0 1px 3px rgba(30,50,80,0.10));
}
/* Outer frame profile — thick, like a real PVC frame */
.demo-frame {
  position: absolute; inset: 0;
  border: 20px solid #3C4A5C;
  background: #3C4A5C;
  transition: all .55s cubic-bezier(.22,.7,.22,1);
  /* Inner reveal shadow */
  box-shadow: inset 0 0 0 3px rgba(255,255,255,0.08), inset 0 2px 4px rgba(0,0,0,0.3);
}
/* Frame profile highlight — thin inner edge */
.demo-frame::before {
  content: '';
  position: absolute; inset: -3px;
  border: 3px solid rgba(255,255,255,0.10);
  pointer-events: none;
}
/* Glass pane — sits inside 20px frame border */
.demo-glass {
  position: absolute; inset: 20px;
  background:
    linear-gradient(160deg,
      rgba(210,230,252,0.75) 0%,
      rgba(195,220,248,0.55) 25%,
      rgba(175,208,245,0.45) 55%,
      rgba(190,218,250,0.60) 80%,
      rgba(205,225,250,0.65) 100%);
  border: 1px solid rgba(255,255,255,0.65);
}
/* Sky/landscape reflection inside glass */
.demo-glass::after {
  content: '';
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg,
      rgba(220,235,255,0.45) 0%,
      rgba(200,220,248,0.20) 40%,
      rgba(210,230,252,0.30) 70%,
      rgba(190,215,245,0.35) 100%);
}
/* Bright diagonal reflection */
.demo-reflection {
  position: absolute; top: 20px; left: 20px; right: 20px; height: 44%;
  background: linear-gradient(155deg,
    rgba(255,255,255,0.52) 0%,
    rgba(255,255,255,0.22) 30%,
    rgba(255,255,255,0.06) 55%,
    transparent 75%);
  pointer-events: none; z-index: 2;
}
/* Central mullion cross */
.demo-mullion-v {
  position: absolute; left: 50%; top: 20px; bottom: 20px;
  width: 12px; margin-left: -6px;
  background: #3C4A5C;
  box-shadow: inset 1px 0 0 rgba(255,255,255,0.07), inset -1px 0 0 rgba(0,0,0,0.15);
  z-index: 3;
}
.demo-mullion-h {
  position: absolute; top: 50%; left: 20px; right: 20px;
  height: 12px; margin-top: -6px;
  background: #3C4A5C;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.07), inset 0 -1px 0 rgba(0,0,0,0.15);
  z-index: 3;
}
/* Handle — slim lever style */
.demo-handle {
  position: absolute; right: -2px; top: 50%; transform: translateY(-50%);
  z-index: 4; transition: all .45s ease;
}
.demo-handle::before {
  content: '';
  display: block; width: 6px; height: 52px;
  background: linear-gradient(180deg, #9EAAB8 0%, #7C8A98 40%, #6B7888 100%);
  border-radius: 3px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.28), inset 1px 0 0 rgba(255,255,255,0.25);
}
/* Handle knob */
.demo-handle::after {
  content: '';
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  width: 12px; height: 12px;
  background: linear-gradient(135deg, #A8B4C0 0%, #7C8A98 100%);
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
}

/* ======== ANIMATIONS ======== */

/* FIXED — subtle accent glow, stays still */
.opening-preview[data-mode="fixed"] .demo-frame {
  border-color: #3C4A5C;
}
.opening-preview[data-mode="fixed"] .demo-frame::before { border-color: rgba(46,117,182,0.18); }

/* TILT — top opens outward, pivot at bottom */
.opening-preview[data-mode="tilt"] .demo-frame {
  transform-origin: bottom center;
  transform: perspective(700px) rotateX(-22deg);
  border-color: #2E5A8A;
  box-shadow: inset 0 0 0 3px rgba(46,117,182,0.15), inset 0 2px 4px rgba(0,0,0,0.3);
}
.opening-preview[data-mode="tilt"] .demo-glass {
  background:
    linear-gradient(160deg,
      rgba(210,235,255,0.60) 0%,
      rgba(185,215,250,0.40) 50%,
      rgba(200,225,252,0.55) 100%);
}
.opening-preview[data-mode="tilt"] .demo-handle::before {
  transform: rotate(25deg);
  background: linear-gradient(180deg, #6EB0E8 0%, #4A8FD0 100%);
}

/* TURN — pivots on left hinge, opens right */
.opening-preview[data-mode="turn"] .demo-frame {
  transform-origin: left center;
  transform: perspective(700px) rotateY(32deg);
  border-color: #2E5A8A;
}
.opening-preview[data-mode="turn"] .demo-handle::before {
  background: linear-gradient(180deg, #6EB0E8 0%, #4A8FD0 100%);
}
.opening-preview[data-mode="turn"] .demo-handle::after { background: linear-gradient(135deg, #80C0F0 0%, #4A8FD0 100%); }

/* SLIDING — second sash slides */
.opening-preview[data-mode="sliding"] .demo-frame { border-color: #2E5A8A; }
.sliding-sash-moved {
  position: absolute; inset: 0;
  /* Ghost of the sliding sash */
  border: 20px solid rgba(46,117,182,0.50);
  background: transparent;
  transform: translateX(52px);
  pointer-events: none;
  transition: transform .55s cubic-bezier(.22,.7,.22,1);
  z-index: 5;
  box-shadow: inset 0 0 0 3px rgba(46,117,182,0.10);
}
.sliding-sash-moved .demo-glass {
  position: absolute; inset: 20px;
  background: linear-gradient(145deg,
    rgba(195,220,248,0.35) 0%,
    rgba(180,210,245,0.20) 100%);
  border: 1px solid rgba(46,117,182,0.25);
}
.opening-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px;
}
.opening-card {
  background: var(--surface); border: 1px solid var(--border);
  padding: 36px 24px 32px; display: flex; flex-direction: column; align-items: center; transition: all .25s; position: relative; overflow: hidden;
}
.opening-card:hover, .opening-card.active { border-color: var(--accent); }
.opening-card:hover { background: var(--surface-2); transform: translateY(-4px); box-shadow: 0 20px 48px -20px rgba(0,0,0,0.6); }
.opening-card.active { box-shadow: inset 0 2px 0 var(--accent); }
.opening-card.active::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--accent); }
.opening-window-anim {
  width: 100px; height: 120px; position: relative; margin-bottom: 24px;
}
/* CSS window frame */
.ow-frame {
  position: absolute; inset: 0;
  border: 8px solid var(--border-2);
  background: rgba(46,117,182,0.06);
  transition: all .4s cubic-bezier(.2,.7,.2,1);
}
.ow-glass {
  position: absolute; inset: 8px;
  background: linear-gradient(135deg, rgba(46,117,182,0.15) 0%, rgba(100,160,220,0.08) 100%);
}
.ow-handle {
  position: absolute; right: -4px; top: 50%; transform: translateY(-50%);
  width: 4px; height: 28px; background: var(--border-2); border-radius: 1px;
  transition: all .4s ease;
}
/* Tilt animation */
.opening-card:nth-child(1):hover .ow-frame,
.opening-card:nth-child(1).active .ow-frame {
  transform-origin: bottom center;
  transform: perspective(400px) rotateX(-15deg);
  border-color: var(--accent);
}
/* Turn animation */
.opening-card:nth-child(2):hover .ow-frame,
.opening-card:nth-child(2).active .ow-frame {
  transform-origin: left center;
  transform: perspective(400px) rotateY(20deg);
  border-color: var(--accent);
}
/* Tilt+Turn */
.opening-card:nth-child(3):hover .ow-frame,
.opening-card:nth-child(3).active .ow-frame {
  transform-origin: bottom left;
  transform: perspective(400px) rotateX(-10deg) rotateY(15deg);
  border-color: var(--accent);
}
/* Fixed — subtle glow */
.opening-card:nth-child(4):hover .ow-frame,
.opening-card:nth-child(4).active .ow-frame {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(46,117,182,0.3);
}
.opening-name {
  font-family: var(--font-head); font-weight: 700; font-size: 16px;
  letter-spacing: -0.01em; margin-bottom: 8px;
}
.opening-desc { font-size: 12px; color: var(--ink-dim); text-align: center; line-height: 1.5; }

/* ======= ACCESSORIES ======= */
.accessories-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px;
}
.acc-card {
  background: var(--surface); border: 1px solid var(--border);
  display: flex; gap: 20px; padding: 24px; align-items: flex-start;
  transition: all .25s;
}
.acc-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: 0 16px 40px -20px rgba(0,0,0,0.6); }
.acc-img {
  width: 72px; height: 72px; flex-shrink: 0;
  background: var(--bg); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
}
.acc-img svg { opacity: 0.5; }
.acc-body .k { font-weight: 600; font-size: 15px; margin-bottom: 6px; }
.acc-body .v { font-size: 13px; color: var(--ink-dim); line-height: 1.5; }
.acc-tag {
  display: inline-block; margin-top: 10px;
  font-family: 'JetBrains Mono', monospace; font-size: 9px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); border: 1px solid rgba(46,117,182,0.3); padding: 3px 8px;
}

/* ======= DOWNLOADS ======= */
.downloads-section { background: var(--bg-2); }
.downloads-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.dl-card {
  background: var(--surface); border: 1px solid var(--border);
  padding: 28px; display: flex; align-items: center; gap: 20px;
  transition: all .25s; cursor: pointer;
}
.dl-card:hover { border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 12px 32px -16px rgba(0,0,0,0.5); }
.dl-icon {
  width: 52px; height: 52px; flex-shrink: 0;
  border: 1px solid var(--border-2); display: grid; place-items: center; color: var(--accent);
}
.dl-body .k { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.dl-body .v { font-size: 12px; color: var(--ink-mute); font-family: 'JetBrains Mono', monospace; letter-spacing: 0.08em; }
.dl-arrow { margin-left: auto; color: var(--ink-mute); transition: all .2s; }
.dl-card:hover .dl-arrow { color: var(--accent); transform: translateX(3px); }

/* ======= CTA SECTION — stronger separation as conversion peak ======= */
.cta-section {
  background: var(--bg);
  position: relative; overflow: hidden;
  border-top: 2px solid rgba(46,117,182,0.35);
  border-bottom: 2px solid rgba(46,117,182,0.35);
  box-shadow: 0 -24px 80px -20px rgba(0,0,0,0.5), 0 24px 80px -20px rgba(0,0,0,0.5);
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(80% 60% at 100% 100%, rgba(46,117,182,0.15) 0%, transparent 60%),
    radial-gradient(40% 40% at 0% 0%, rgba(46,117,182,0.08) 0%, transparent 50%);
  pointer-events: none;
}
.cta-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center;
}
.cta-copy h2 { font-size: 40px; font-weight: 700; letter-spacing: -0.025em; line-height: 1.1; margin-bottom: 20px; }
.cta-copy h2 em { font-style: normal; color: var(--accent); }
.cta-copy p { font-size: 16px; color: rgba(255,255,255,0.78); line-height: 1.7; margin-bottom: 36px; }
.cta-bullets { display: flex; flex-direction: column; gap: 12px; margin-bottom: 40px; }
.cta-bullet {
  display: flex; align-items: center; gap: 12px;
  font-size: 14px; color: rgba(255,255,255,0.78);
}
.cta-bullet::before { content: ''; width: 6px; height: 6px; background: var(--accent); flex-shrink: 0; border-radius: 50%; }
.cta-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.cta-form-wrap {
  background: var(--surface); border: 1px solid var(--border);
  padding: 40px; box-shadow: 0 24px 64px -32px rgba(0,0,0,0.6);
}
.cta-form-wrap h3 { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.cta-form-subtitle { font-size: 13px; color: var(--ink-mute); margin-bottom: 28px; }
.field { margin-bottom: 16px; }
.field label {
  display: block; font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: 8px;
}
.field input, .field textarea, .field select {
  width: 100%; background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 13px 15px; color: var(--ink);
  font-family: var(--font-body); font-size: 14px; transition: border-color .15s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--accent); }
.field textarea { resize: vertical; min-height: 90px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-privacy { font-size: 11px; color: var(--ink-mute); line-height: 1.5; margin-bottom: 16px; }

/* Downloads section - add photo accent strip at top */
.downloads-section {
  background: var(--light-bg) !important;
  border-top: 1px solid var(--light-border);
  border-bottom: 1px solid var(--light-border);
}
.downloads-hero-strip {
  height: 180px; margin: 0 0 48px;
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--light-border);
}
.downloads-hero-strip img {
  width: 100%; height: 100%; object-fit: cover; object-position: center 40%;
  filter: brightness(0.75) saturate(0.7);
}
.downloads-hero-strip::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(240,242,247,0.0) 0%, rgba(240,242,247,0.6) 100%);
}
.downloads-hero-strip .strip-label {
  position: absolute; bottom: 20px; left: 40px;
  font-family: var(--font-head); font-weight: 700;
  font-size: 22px; color: #fff; letter-spacing: -0.01em;
  text-shadow: 0 2px 12px rgba(0,0,0,0.4);
  z-index: 2;
}
.downloads-section h2 { color: var(--light-ink) !important; }
.downloads-section p { color: var(--light-ink-dim) !important; }
.downloads-section .section-label .num { color: var(--accent) !important; }
.downloads-section .section-label .rule { background: var(--light-border-2) !important; }
.downloads-section .section-label .tag { color: var(--light-ink-dim) !important; }
.downloads-section .dl-card {
  background: var(--light-surface) !important;
  border-color: var(--light-border) !important;
  box-shadow: 0 2px 8px rgba(20,40,70,0.08) !important;
  border-left: 3px solid var(--accent) !important;
  padding: 28px 28px 28px 24px !important;
}
.downloads-section .dl-card:hover {
  border-color: var(--accent) !important;
  border-left-color: var(--accent) !important;
  box-shadow: 0 8px 28px rgba(20,40,70,0.14) !important;
  transform: translateY(-2px);
}
.downloads-section .dl-icon { border-color: var(--light-border-2) !important; }
.downloads-section .dl-body .k { color: var(--light-ink) !important; }
.downloads-section .dl-body .v { color: var(--light-ink-mute) !important; }
.downloads-section .dl-arrow { color: var(--light-ink-mute) !important; }
.downloads-section .dl-card:hover .dl-arrow { color: var(--accent) !important; }
/* Specs collapse in light context */
.downloads-section .specs-collapse-toggle {
  background: var(--light-surface) !important; border-color: var(--light-border) !important;
  color: var(--light-ink-dim) !important;
}
.downloads-section .specs-collapse-toggle:hover { border-color: var(--accent) !important; color: var(--light-ink) !important; }
.downloads-section .specs-toggle-ico { color: var(--light-ink-mute) !important; }
.downloads-section .specs-toggle-caret { border-color: var(--light-border-2) !important; color: var(--accent) !important; }
.downloads-section .specs-collapse-body { border-color: var(--light-border) !important; background: var(--light-surface); }
.downloads-section .specs-table tr { border-color: var(--light-border) !important; }
.downloads-section .specs-table tr:nth-child(even) { background: rgba(46,117,182,0.03) !important; }
.downloads-section .specs-table td:first-child { color: var(--light-ink-mute) !important; border-color: var(--light-border) !important; }
.downloads-section .specs-table td:last-child { color: var(--light-ink) !important; }

/* ======= RELATED PRODUCTS — light section for breathing room ======= */
.related-section {
  background: var(--light-bg) !important;
  border-top: 1px solid var(--light-border);
}
.related-section h2 { color: var(--light-ink) !important; }
.related-section .section-label .num { color: var(--accent) !important; }
.related-section .section-label .rule { background: var(--light-border-2) !important; }
.related-section .section-label .tag { color: var(--light-ink-dim) !important; }
.related-section .related-card {
  background: var(--light-surface) !important; border-color: var(--light-border) !important;
  box-shadow: 0 2px 8px rgba(20,40,70,0.06) !important;
}
.related-section .related-card:hover {
  border-color: var(--accent) !important;
  box-shadow: 0 16px 40px rgba(20,40,70,0.16) !important;
}
.related-section .related-img { background: #e8ecf2 !important; border-color: var(--light-border) !important; }
.related-section .related-body h3 { color: var(--light-ink) !important; }
.related-section .related-body p { color: var(--light-ink-dim) !important; }
.related-section .btn--ghost { border-color: var(--light-border-2) !important; color: var(--light-ink) !important; }
.related-section .btn--ghost:hover { border-color: var(--accent) !important; color: var(--accent) !important; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.related-card {
  background: var(--surface); border: 1px solid var(--border);
  cursor: pointer; transition: all .3s; overflow: hidden;
}
.related-card:hover { border-color: var(--accent); transform: translateY(-5px); box-shadow: 0 24px 56px -24px rgba(0,0,0,0.7); }
.related-img { height: 180px; background: var(--bg); border-bottom: 1px solid var(--border); position: relative; display: flex; align-items: center; justify-content: center; }
.related-img-ph {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
}
.related-body { padding: 24px; }
.related-tag {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.related-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.related-body p { font-size: 13px; color: var(--ink-dim); line-height: 1.5; margin-bottom: 18px; }
.related-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent);
}

/* ============================================================
   LIGHT OVERLAY — стратегия идентична с home-light.html
   Тъмен сайт с ДВА светли острова:
   - AboutSystem (.section--light) — светъл
   - Accessories (.section--light) — светъл
   Всичко останало (hero, specs, colors, opening, downloads,
   cta, related, footer) остава тъмно.
   ============================================================ */
body {
  --light-bg:       #F4F6FA;
  --light-surface:  #FFFFFF;
  --light-border:   #D8DEE7;
  --light-border-2: #B9C2CE;
  --light-ink:      #1A2230;
  --light-ink-dim:  #3A4556;
  --light-ink-mute: #6B7688;
}
.section--light {
  background: var(--light-bg) !important;
  color: var(--light-ink) !important;
  border-top: 1px solid var(--light-border) !important;
  border-bottom: 1px solid var(--light-border) !important;
  box-shadow: none !important;
}
.section--light h2, .section--light h3, .section--light h4 { color: var(--light-ink) !important; }
.section--light p, .section--light .lead { color: var(--light-ink-dim) !important; }
.section--light .section-label { color: var(--light-ink-mute) !important; }
.section--light .section-label .num { color: var(--accent) !important; }
.section--light .section-label .rule { background: var(--light-border-2) !important; }
.section--light .section-label .tag { color: var(--light-ink-dim) !important; }
.section--light .benefit-item {
  background: var(--light-surface) !important;
  border-color: var(--light-border) !important;
  box-shadow: 0 2px 8px rgba(20,30,50,0.07) !important;
}
.section--light .benefit-item:hover { border-color: var(--accent) !important; }
.section--light .benefit-ico { border-color: var(--light-border-2) !important; }
.section--light .benefit-text .k { color: var(--light-ink) !important; }
.section--light .benefit-text .v { color: var(--light-ink-dim) !important; }
.section--light .btn--ghost {
  border-color: var(--light-border-2) !important;
  color: var(--light-ink) !important;
}
.section--light .btn--ghost:hover { border-color: var(--accent) !important; color: var(--accent) !important; }
.section--light .acc-card {
  background: var(--light-surface) !important;
  border-color: var(--light-border) !important;
  box-shadow: 0 2px 8px rgba(20,30,50,0.07) !important;
}
.section--light .acc-card:hover {
  border-color: var(--accent) !important;
  box-shadow: 0 16px 40px -16px rgba(20,30,50,0.2) !important;
}
.section--light .acc-img {
  background: var(--light-bg) !important;
  border-color: var(--light-border) !important;
}
.section--light .acc-body .k { color: var(--light-ink) !important; }
.section--light .acc-body .v { color: var(--light-ink-dim) !important; }
/* cross-section in light context */
.section--light .cross-section-ph {
  background: linear-gradient(160deg, #e8edf5 0%, #f0f4fa 60%, #eaeff7 100%) !important;
  border-color: var(--light-border) !important;
}
.section--light .cross-badge {
  background: var(--light-surface) !important;
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}
.section--light .raufipro-tag {
  background: rgba(46,117,182,0.07) !important;
  border-color: rgba(46,117,182,0.2) !important;
}
.section--light .raufipro-tag .txt { color: var(--light-ink-dim) !important; }
.section--light .raufipro-tag .txt strong { color: var(--light-ink) !important; }

/* ============================================================
   STICKY SIDE NAV — desktop ≥1280px left gutter
   ============================================================ */
.side-nav {
  position: fixed;
  left: 0; top: 50%;
  transform: translateY(-50%);
  z-index: 45;
  width: 48px;
  display: flex; flex-direction: column; align-items: center;
  gap: 2px;
  padding: 14px 0;
  background: rgba(21,27,36,0.90);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-right: 1px solid var(--border);
  border-radius: 0 4px 4px 0;
  box-shadow: 2px 0 24px rgba(0,0,0,0.3);
}
@media (max-width: 1279px) { .side-nav { display: none; } }

.side-nav-item {
  position: relative;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-mute);
  cursor: pointer;
  transition: color .18s, background .18s;
  border-radius: 2px;
}
.side-nav-item:hover { color: var(--ink); background: rgba(255,255,255,0.06); }
.side-nav-item.active { color: var(--accent); }
.side-nav-item.active::before {
  content: '';
  position: absolute; left: 0; top: 8px; bottom: 8px;
  width: 2px; background: var(--accent);
  border-radius: 0 1px 1px 0;
}
.side-nav-item svg { display: block; flex-shrink: 0; }
/* Tooltip */
.side-nav-item::after {
  content: attr(data-label);
  position: absolute; left: calc(100% + 10px);
  top: 50%; transform: translateY(-50%);
  background: rgba(14,17,22,0.95);
  border: 1px solid var(--border);
  color: var(--ink);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 6px 12px; white-space: nowrap;
  opacity: 0; pointer-events: none;
  transition: opacity .15s, transform .15s;
  transform: translateY(-50%) translateX(-4px);
}
.side-nav-item:hover::after {
  opacity: 1; transform: translateY(-50%) translateX(0);
}
/* Divider inside side nav */
.side-nav-divider {
  width: 24px; height: 1px; background: var(--border);
  margin: 4px 0; flex-shrink: 0;
}
/* CTA button at bottom of side nav */
.side-nav-cta {
  width: 40px; height: 40px; background: var(--accent);
  display: flex; align-items: center; justify-content: center;
  color: #fff; cursor: pointer; border-radius: 2px;
  transition: background .15s;
  margin-top: 4px;
}
.side-nav-cta:hover { background: var(--accent-hover); }
.side-nav-cta::after {
  content: 'Оферта';
  position: absolute; left: calc(100% + 10px);
  top: 50%; transform: translateY(-50%);
  background: var(--accent);
  color: #fff;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 6px 12px; white-space: nowrap;
  opacity: 0; pointer-events: none;
  transition: opacity .15s;
}
.side-nav-cta:hover::after { opacity: 1; }

/* ============================================================
   HORIZONTAL NAV — tablet/mobile <1280px
   ============================================================ */
.horiz-nav {
  position: sticky; top: 84px; z-index: 40;
  background: rgba(21,27,36,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 4px 20px -8px rgba(0,0,0,0.5);
}
@media (min-width: 1280px) { .horiz-nav { display: none; } }
.horiz-nav-inner {
  display: flex; align-items: stretch;
  height: 48px; overflow-x: auto; scrollbar-width: none;
}
.horiz-nav-inner::-webkit-scrollbar { display: none; }
.horiz-nav a {
  display: flex; align-items: center;
  padding: 0 18px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-mute); white-space: nowrap;
  border-right: 1px solid var(--border);
  transition: color .15s, background .15s;
  position: relative; text-decoration: none;
}
.horiz-nav a:hover { color: var(--ink); }
.horiz-nav a.active { color: var(--accent); }
.horiz-nav a.active::after {
  content: ''; position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px; background: var(--accent);
}
.horiz-nav .hn-cta {
  margin-left: auto; flex-shrink: 0;
  background: var(--accent); color: #fff !important;
  border-right: 0; font-family: var(--font-head);
  font-weight: 700; font-size: 11px;
  padding: 0 20px; gap: 6px;
}
.horiz-nav .hn-cta:hover { background: var(--accent-hover); }
.horiz-nav .hn-cta::after { display: none; }

/* ============================================================
   TABBED ACCESSORIES CAROUSEL
   ============================================================ */
.acc-section { background: var(--bg-2); }
.acc-tabs {
  display: flex; gap: 0; border-bottom: 1px solid var(--border);
  margin-bottom: 36px;
}
.acc-tab {
  padding: 14px 24px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-mute); cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
  white-space: nowrap;
}
.acc-tab:hover { color: var(--ink); }
.acc-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.acc-carousel-wrap {
  position: relative; overflow: hidden;
}
.acc-carousel-track {
  display: flex; gap: 20px;
  transition: transform .4s cubic-bezier(.2,.7,.2,1);
}
.acc-carousel-card {
  flex: 0 0 calc(33.333% - 14px);
  background: var(--surface); border: 1px solid var(--border);
  padding: 0; display: flex; flex-direction: column; gap: 0;
  transition: border-color .2s, transform .2s, box-shadow .2s;
  min-width: 0; overflow: hidden;
}
.acc-card-img {
  width: 100%; height: 160px; overflow: hidden; flex-shrink: 0;
  background: var(--bg); position: relative;
}
.acc-card-img img {
  width: 100%; height: 100%; object-fit: cover; object-position: center;
  display: block; filter: brightness(0.85) saturate(0.8);
  transition: transform .5s ease, filter .3s ease;
}
.acc-carousel-card:hover .acc-card-img img {
  transform: scale(1.05); filter: brightness(0.95) saturate(0.9);
}
.acc-card-body {
  padding: 22px; display: flex; flex-direction: column; gap: 10px; flex: 1;
}
.acc-carousel-card:hover { border-color: var(--accent); }
.acc-carousel-img {
  width: 56px; height: 56px;
  background: var(--bg); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; color: var(--accent);
}
.acc-carousel-k { font-weight: 600; font-size: 15px; color: var(--ink); }
.acc-carousel-v { font-size: 13px; color: var(--ink-dim); line-height: 1.5; flex: 1; }
.acc-carousel-tag {
  align-self: flex-start;
  font-family: 'JetBrains Mono', monospace; font-size: 9px;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent); border: 1px solid rgba(46,117,182,0.3); padding: 3px 8px;
}
/* nav arrows */
.acc-nav {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 28px;
}
.acc-nav-btns { display: flex; gap: 8px; }
.acc-nav-btn {
  width: 40px; height: 40px; border: 1px solid var(--border-2);
  display: grid; place-items: center;
  color: var(--ink-mute); cursor: pointer;
  transition: border-color .15s, color .15s, background .15s;
  background: none;
}
.acc-nav-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); background: rgba(46,117,182,0.08); }
.acc-nav-btn:disabled { opacity: 0.3; cursor: default; }
.acc-nav-dots { display: flex; gap: 6px; align-items: center; }
.acc-nav-dot {
  width: 6px; height: 6px; background: var(--border-2);
  border-radius: 50%; transition: background .2s, transform .2s;
  cursor: pointer;
}
.acc-nav-dot.active { background: var(--accent); transform: scale(1.3); }

/* Acc section photo strip */
.acc-section-strip {
  height: 160px; margin: 0 0 36px;
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--light-border);
}
.acc-section-strip img {
  width: 100%; height: 100%; object-fit: cover; object-position: center 30%;
  filter: brightness(0.72) saturate(0.75);
}
.acc-section-strip::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(244,246,250,0.0) 0%, rgba(244,246,250,0.55) 100%);
}
.acc-section-strip .strip-label {
  position: absolute; bottom: 18px; left: 40px;
  font-family: var(--font-head); font-weight: 700;
  font-size: 20px; color: #fff; letter-spacing: -0.01em;
  text-shadow: 0 2px 12px rgba(0,0,0,0.4); z-index: 2;
}

/* Light overrides for acc-section (already section--light) */
.acc-section .acc-tab { color: var(--light-ink-mute); }
.acc-section .acc-tab:hover { color: var(--light-ink); }
.acc-section .acc-tab.active { color: var(--accent); }
.acc-section .acc-tabs { border-color: var(--light-border); }
.acc-section .acc-carousel-card {
  background: var(--light-surface) !important; border-color: var(--light-border) !important;
  box-shadow: 0 1px 4px rgba(20,40,70,0.06) !important;
}
.acc-section .acc-carousel-card:hover { border-color: var(--accent) !important; box-shadow: 0 8px 24px rgba(20,40,70,0.12) !important; }
.acc-section .acc-card-img { background: var(--light-border) !important; }
.acc-section .acc-carousel-k { color: var(--light-ink) !important; }
.acc-section .acc-carousel-v { color: var(--light-ink-dim) !important; }
.acc-section .acc-nav-btn { border-color: var(--light-border-2) !important; color: var(--light-ink-mute) !important; }
.acc-section .acc-nav-btn:hover:not(:disabled) { border-color: var(--accent) !important; color: var(--accent) !important; background: rgba(46,117,182,0.06) !important; }
.acc-section .acc-nav-dot { background: var(--light-border-2); }
.acc-section .acc-nav-dot.active { background: var(--accent); }

/* ============================================================
   OPENING TYPES — updated with Sliding + larger demo window
   ============================================================ */
.opening-demo-wrap {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; align-items: stretch; margin-top: 48px;
}
.opening-btns {
  display: flex; flex-direction: column; gap: 10px;
}
.opening-btn {
  display: flex; align-items: center; gap: 16px;
  padding: 18px 20px; background: var(--surface); border: 1px solid var(--border);
  cursor: pointer; transition: all .2s; text-align: left;
}
.opening-btn:hover { border-color: var(--accent); }
.opening-btn.active {
  border-color: var(--accent);
  background: rgba(46,117,182,0.08);
  box-shadow: inset 3px 0 0 var(--accent);
}
.opening-btn-ico {
  width: 44px; height: 44px; flex-shrink: 0;
  border: 1px solid var(--border-2);
  display: grid; place-items: center; color: var(--ink-dim);
  transition: color .2s, border-color .2s;
}
.opening-btn.active .opening-btn-ico { color: var(--accent); border-color: var(--accent); }
.opening-btn-text .k { font-weight: 600; font-size: 15px; margin-bottom: 4px; }
.opening-btn-text .v { font-size: 12px; color: var(--ink-mute); line-height: 1.5; }
/* Large animated window demo */
.opening-preview {
  position: relative; height: 360px;
  background: linear-gradient(135deg, #151b24 0%, #1e2530 100%);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.opening-preview-bg {
  position: absolute; inset: 0;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,0.015) 0, rgba(255,255,255,0.015) 1px, transparent 1px, transparent 60px),
    repeating-linear-gradient(0deg, rgba(255,255,255,0.015) 0, rgba(255,255,255,0.015) 1px, transparent 1px, transparent 60px);
}
.opening-preview-label {
  position: absolute; top: 16px; left: 16px;
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-mute);
  background: rgba(14,17,22,0.8); border: 1px solid var(--border);
  padding: 5px 10px;
}
/* The window element */
.demo-window {
  position: relative; width: 180px; height: 220px;
  transition: all .5s cubic-bezier(.2,.7,.2,1);
}
.demo-frame {
  position: absolute; inset: 0;
  border: 14px solid #4a5568;
  background: transparent;
  transition: all .5s cubic-bezier(.2,.7,.2,1);
}
.demo-glass {
  position: absolute; inset: 14px;
  background: linear-gradient(135deg, rgba(46,117,182,0.18) 0%, rgba(100,160,220,0.10) 50%, rgba(46,117,182,0.15) 100%);
  border: 1px solid rgba(255,255,255,0.08);
}
.demo-reflection {
  position: absolute; top: 14px; left: 14px; width: 60%; height: 40%;
  background: linear-gradient(135deg, rgba(255,255,255,0.07) 0%, transparent 70%);
}
.demo-handle {
  position: absolute; right: 2px; top: 50%; transform: translateY(-50%);
  width: 7px; height: 50px; background: #7a8899; border-radius: 2px;
  transition: all .4s ease;
}
.demo-mullion-v {
  position: absolute; left: 50%; top: 14px; bottom: 14px;
  width: 10px; margin-left: -5px;
  background: #4a5568;
}
.demo-mullion-h {
  position: absolute; top: 50%; left: 14px; right: 14px;
  height: 10px; margin-top: -5px;
  background: #4a5568;
}
/* FIXED */
.opening-preview[data-mode="fixed"] .demo-frame { border-color: var(--accent); }
/* TILT */
.opening-preview[data-mode="tilt"] .demo-frame {
  transform-origin: bottom center;
  transform: perspective(600px) rotateX(-18deg);
  border-color: var(--accent);
}
.opening-preview[data-mode="tilt"] .demo-handle {
  transform: translateY(-50%) rotate(30deg);
}
/* TURN */
.opening-preview[data-mode="turn"] .demo-frame {
  transform-origin: left center;
  transform: perspective(600px) rotateY(28deg);
  border-color: var(--accent);
}
.opening-preview[data-mode="turn"] .demo-handle { background: var(--accent); }
/* SLIDING */
.opening-preview[data-mode="sliding"] .demo-window {
  /* Two sashes: we use a pseudo-element trick via JS-injected class */
}
.opening-preview[data-mode="sliding"] .demo-frame {
  border-color: var(--accent);
}
.sliding-sash-moved {
  position: absolute; inset: 0;
  border: 14px solid rgba(46,117,182,0.5);
  transform: translateX(48px);
  pointer-events: none;
  transition: transform .5s cubic-bezier(.2,.7,.2,1);
}

/* ============================================================
   DOWNLOADS + COLLAPSED SPECS PANEL
   ============================================================ */
.specs-collapse-wrap { margin-top: 40px; }
.specs-collapse-toggle {
  display: flex; align-items: center; justify-content: space-between;
  padding: 15px 20px;
  background: var(--surface); border: 1px solid var(--border);
  cursor: pointer; transition: border-color .2s;
  font-family: 'JetBrains Mono', monospace; font-size: 11px;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-dim);
  user-select: none;
}
.specs-collapse-toggle:hover { border-color: var(--accent); }
.specs-toggle-ico {
  display: flex; align-items: center; gap: 8px; color: var(--ink-mute);
  font-size: 11px;
}
.specs-toggle-caret {
  width: 20px; height: 20px; display: grid; place-items: center;
  border: 1px solid var(--border-2); transition: transform .25s ease; color: var(--accent);
}
.specs-toggle-caret.open { transform: rotate(180deg); }
.specs-collapse-body {
  border: 1px solid var(--border); border-top: 0;
  max-height: 0; overflow: hidden;
  transition: max-height .4s cubic-bezier(.2,.7,.2,1);
}
.specs-collapse-body.open { max-height: 900px; }
.specs-table { width: 100%; border-collapse: collapse; }
.specs-table tr { border-bottom: 1px solid var(--border); }
.specs-table tr:last-child { border-bottom: 0; }
.specs-table tr:nth-child(even) { background: rgba(255,255,255,0.018); }
.specs-table td {
  padding: 12px 20px; font-size: 13px; vertical-align: middle;
}
.specs-table td:first-child {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-mute); width: 44%; border-right: 1px solid var(--border);
}
.specs-table td:last-child { color: var(--ink); font-weight: 500; }
.specs-table .sv { color: var(--accent); font-family: var(--font-head); font-weight: 700; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1100px) {
  /* Hero */
  .product-hero { flex-direction: column; min-height: auto; }
  .hero-left { flex: none; width: 100% !important; padding: 52px var(--gutter) 32px; }
  .hero-right { padding: 0 var(--gutter) 48px; }
  .hero-window-wrap { max-width: 100%; height: 280px; }
  /* Specs band */
  .specs-band-inner { grid-template-columns: repeat(3, 1fr); }
  .spec-cell { border-bottom: 1px solid var(--border); }
  /* About system */
  .about-system-grid { grid-template-columns: 1fr; gap: 40px; }
  .cross-section-wrap { height: 280px; }
  /* Color switcher */
  .color-section-inner { grid-template-columns: 1fr; gap: 40px; }
  .window-preview-wrap { height: 280px; }
  /* Opening — stack vertically, preview below buttons */
  .opening-demo-wrap {
    grid-template-columns: 1fr;
    gap: 0;
    margin-left: 0; margin-right: 0; padding-left: 0;
  }
  .opening-btns {
    flex-direction: row; flex-wrap: wrap;
    padding: 0 var(--gutter) 28px;
  }
  .opening-btn { flex: 1 1 calc(50% - 8px); min-width: 200px; }
  .opening-preview.opening-preview--img {
    min-height: 280px; height: 280px;
    border-top: 1px solid rgba(200,210,225,0.3);
  }
  /* Accessories */
  .acc-carousel-card { flex: 0 0 calc(50% - 10px); }
  /* Downloads */
  .downloads-grid { grid-template-columns: repeat(2, 1fr); }
  /* CTA */
  .cta-inner { grid-template-columns: 1fr; gap: 40px; }
  .cta-form-wrap { padding: 28px; }
  /* Related */
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  /* Horiz nav */
  .horiz-nav { top: 0; }
}

/* Tablet portrait */
@media (max-width: 768px) {
  .specs-band-inner { grid-template-columns: repeat(2, 1fr); }
  .about-system-grid { grid-template-columns: 1fr; }
  .cta-inner { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr 1fr; }
  .hero-cta { flex-wrap: wrap; }
}

/* Mobile */
@media (max-width: 640px) {
  /* Specs */
  .specs-band-inner { grid-template-columns: repeat(2, 1fr); }
  .spec-cell:nth-child(odd) { border-right: 1px solid var(--border); }
  /* Hero */
  .hero-cta { flex-direction: column; }
  .product-hero h1 { font-size: 32px; }
  /* Opening */
  .opening-btns { flex-direction: column; padding: 0 var(--gutter) 24px; }
  .opening-btn { flex: none; width: 100%; }
  .opening-preview.opening-preview--img { min-height: 240px; height: 240px; }
  /* Accessories */
  .acc-carousel-card { flex: 0 0 calc(100%); }
  .acc-tabs { overflow-x: auto; scrollbar-width: none; }
  .acc-tabs::-webkit-scrollbar { display: none; }
  .acc-card-img { height: 140px; }
  /* Downloads */
  .downloads-grid { grid-template-columns: 1fr; }
  /* CTA form */
  .field-row { grid-template-columns: 1fr; }
  .cta-form-wrap { padding: 20px; }
  .cta-btns { flex-direction: column; }
  /* Related */
  .related-grid { grid-template-columns: 1fr; }
  /* General */
  .section { padding: 48px 0; }
  .section-label { margin-bottom: 20px; }
  h2 { font-size: clamp(24px, 6vw, 36px) !important; }
  .btn { padding: 14px 20px; font-size: 12px; }
}

/* Very small phones */
@media (max-width: 380px) {
  .specs-band-inner { grid-template-columns: repeat(2, 1fr); }
  .hero-window-wrap { height: 220px; }
  .spec-val { font-size: 20px; }
}

/* ==========================================================================
   Адаптации за WordPress (единственото добавено към демото): интерактивните
   елементи са <button>, панелите на разделите се крият с [hidden], статус на формата
   ========================================================================== */
.opening-btn, .acc-tab, .specs-collapse-toggle, .color-swatch { font-family: inherit; text-align: left; }
.opening-btn { width: 100%; }
.specs-collapse-toggle { width: 100%; }
.acc-panel[hidden] { display: none; }
.about-system-copy .lead p + p { margin-top: 12px; }
.form-privacy label { display: flex; gap: 8px; align-items: flex-start; cursor: pointer; }
.form-privacy input { margin-top: 3px; }
.form-status { font-size: 13px; margin: 0 0 12px; padding: 10px 12px; border-radius: var(--radius); }
.form-status.ok { background: rgba(46,117,182,0.12); color: var(--ink); border: 1px solid var(--accent); }
.form-status.err { background: rgba(216,74,74,0.12); color: var(--ink); border: 1px solid var(--danger); }
@media (max-width: 768px) { .opening-intro { grid-template-columns: 1fr !important; gap: 16px !important; } .downloads-head { flex-direction: column; align-items: flex-start !important; gap: 12px; } .downloads-head p { text-align: left !important; } }
@media (min-width: 1280px) and (max-width: 1439px) { .hero-left { padding-left: 72px; } } /* да не влиза под страничната навигация */
/* Лентата върху снимката в „За системата": плътен тъмен фон и светъл текст, за да се чете върху снимка
   (в демото беше прозрачна с тъмен текст; решение 03.09) */
.section--light .raufipro-tag { background: rgba(14,17,22,0.82); border-color: rgba(46,117,182,0.5); backdrop-filter: blur(4px); }
.section--light .raufipro-tag .txt { color: var(--ink-dim) !important; }
.section--light .raufipro-tag .txt strong { color: var(--ink) !important; }

/* Цветове при окачена фасада: мрежа от колони и греди вместо прозорец с кръстачка (03.09) */
.preview-window--facade { width: 340px; height: 300px; }
.preview-window--facade .preview-mullion-v { width: 10px; left: auto; transform: translateX(-50%); }
.preview-window--facade .preview-mullion-h { height: 10px; top: auto; transform: translateY(-50%); }
.preview-window--facade .preview-frame { border-width: 12px; }
@media (max-width: 640px) { .preview-window--facade { width: 260px; height: 230px; } }


/* ==========================================================================
   ФАСАДА: секция „Експлоатационни характеристики" (таблицата отворена, светъл фон)
   ========================================================================== */
.perf-section { padding-top: 64px; padding-bottom: 64px; }
.perf-head { display: flex; justify-content: space-between; align-items: end; gap: 32px; margin-bottom: 32px; }
.perf-head h2 { font-size: 32px; font-weight: 700; letter-spacing: -0.02em; color: var(--light-ink); }
.perf-head p { font-size: 14px; color: var(--light-ink-dim); max-width: 420px; text-align: right; line-height: 1.6; margin: 0; }
.perf-table { background: var(--light-surface); border: 1px solid var(--light-border); }
.perf-table tr { border-color: var(--light-border); }
.perf-table tr:nth-child(even) { background: rgba(46,117,182,0.03); }
.perf-table td { padding: 14px 20px; }
.perf-table td:first-child { color: var(--light-ink-mute); border-color: var(--light-border); width: 40%; }
.perf-table td:last-child { color: var(--light-ink); }
@media (max-width: 768px) {
  .perf-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .perf-head p { text-align: left; }
  .perf-head h2 { font-size: 26px; }
  .perf-table td:first-child { width: 50%; }
}