/* ══════════════════════════════════════════════════════════════════
   VIUCraft Live Demo — developer-tool styling
   Blue → Cyan accent system, matched to the homepage redesign.
   Bootstrap 5.3 + design tokens (variables.css). Dark mode via
   [data-theme="dark"]. Responsive 375px → 1440px+.
   ══════════════════════════════════════════════════════════════════ */

/* ════════════════════════ HERO ════════════════════════ */
.demo-hero {
  position: relative;
  text-align: center;
  padding: clamp(6rem, 10vw, 7.5rem) 1.5rem clamp(2.5rem, 5vw, 3.25rem);
  background: var(--vc-surface-2);
  border-bottom: 1px solid var(--vc-edge);
  overflow: hidden;
}
.demo-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(15, 23, 42, 0.045) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 0%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 80% at 50% 0%, #000 30%, transparent 75%);
  pointer-events: none;
}
[data-theme="dark"] .demo-hero::before {
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
}
.demo-hero .container { position: relative; z-index: 1; }

.demo-hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
  color: var(--vc-text);
}
.demo-hero p {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--vc-text-muted);
  max-width: 540px;
  margin: 0 auto 1.5rem;
  line-height: 1.6;
  text-wrap: balance;
}

.no-signup-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  color: #0f9d6b;
  border: 1px solid rgba(16, 185, 129, 0.25);
  font-size: var(--font-size-sm);
  font-weight: 600;
}
.no-signup-badge i { font-size: 0.9rem; }
[data-theme="dark"] .no-signup-badge { color: #34d399; background: rgba(16, 185, 129, 0.12); }

/* ════════════════════════ DEMO LAYOUT ════════════════════════ */
.demo-section { padding: clamp(2.5rem, 5vw, 4rem) 0 clamp(3.5rem, 7vw, 5.5rem); background: var(--bg-body); }
[data-theme="dark"] .demo-section { background: #07070e; }

.demo-layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 2rem;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.5rem;
  align-items: start;
}

/* ── Controls panel ── */
.demo-controls {
  background: var(--vc-surface);
  border: 1px solid var(--vc-edge);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
}
[data-theme="dark"] .demo-controls { box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 8px 24px -16px rgba(0, 0, 0, 0.6); }

.demo-controls h2 {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: var(--font-size-base);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--vc-edge);
  color: var(--vc-text);
}
.demo-controls h2 i { color: var(--vc-accent); }
.demo-controls h2 .text-primary { color: var(--vc-accent) !important; }

.op-group { margin-bottom: 1.5rem; }
.op-group:last-child { margin-bottom: 0; }

.op-group-label {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--neutral-400);
  margin-bottom: 0.7rem;
}

/* op toggle row */
.op-toggle {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--vc-edge);
  border-radius: var(--radius-md);
  margin-bottom: 0.4rem;
  cursor: pointer;
  user-select: none;
  transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
}
.op-toggle:hover {
  border-color: rgba(14, 165, 233, 0.4);
  background: rgba(14, 165, 233, 0.03);
}
.op-toggle.active {
  border-color: rgba(14, 165, 233, 0.55);
  background: rgba(14, 165, 233, 0.06);
  box-shadow: 0 0 0 1px rgba(14, 165, 233, 0.25) inset;
}

/* hide native checkbox, keep it accessible & functional */
.op-toggle input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  pointer-events: none;
}

.op-toggle-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--vc-grad-brand);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.82rem;
  flex-shrink: 0;
  box-shadow: 0 4px 10px -4px rgba(14, 165, 233, 0.6);
}

.op-toggle-text { display: flex; flex-direction: column; gap: 1px; min-width: 0; flex: 1; }
.op-toggle-name { font-size: var(--font-size-sm); font-weight: 600; color: var(--vc-text); letter-spacing: -0.01em; }
.op-toggle-desc { font-size: var(--font-size-xs); color: var(--vc-text-muted); }

/* check indicator on the right */
.op-toggle::after {
  content: "\f00c";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 0.6rem;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  display: grid;
  place-items: center;
  flex-shrink: 0;
  color: transparent;
  border: 1.5px solid var(--border-default);
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}
.op-toggle.active::after {
  background: var(--vc-accent);
  border-color: var(--vc-accent);
  color: #fff;
}

/* parameter slider block */
.op-param {
  margin: -0.1rem 0 0.6rem;
  padding: 0.75rem 0.9rem 0.85rem;
  background: var(--vc-surface-2);
  border: 1px solid var(--vc-edge);
  border-radius: var(--radius-md);
}
.op-param label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--vc-text-muted);
  margin-bottom: 0.55rem;
}
.op-param .range-val {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-weight: 700;
  color: var(--vc-accent-strong);
  background: rgba(14, 165, 233, 0.1);
  padding: 1px 7px;
  border-radius: 5px;
}
[data-theme="dark"] .op-param .range-val { color: #7dd3fc; background: rgba(14, 165, 233, 0.16); }

/* custom range slider */
.op-param input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--neutral-200);
  outline: none;
  cursor: pointer;
}
[data-theme="dark"] .op-param input[type="range"] { background: rgba(255, 255, 255, 0.12); }
.op-param input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--vc-accent);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.25);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.op-param input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.12); box-shadow: 0 0 0 6px rgba(14, 165, 233, 0.16); }
.op-param input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--vc-accent);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.25);
}
[data-theme="dark"] .op-param input[type="range"]::-webkit-slider-thumb,
[data-theme="dark"] .op-param input[type="range"]::-moz-range-thumb { background: #0e0e1a; }

/* ════════════════════════ PREVIEW ════════════════════════ */
.demo-preview { position: sticky; top: 1.5rem; }

/* URL bar — terminal style */
.demo-url-bar {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.7rem 0.7rem 0.7rem 1rem;
  margin-bottom: 1.25rem;
  background: var(--vc-code-bg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  box-shadow: 0 18px 40px -24px rgba(15, 23, 42, 0.5), 0 0 50px -30px rgba(14, 165, 233, 0.5);
}
.demo-url-bar .url-method {
  font-family: var(--font-family-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: #7fe0a8;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}
.demo-url-bar input {
  flex: 1;
  min-width: 0;
  background: none;
  border: none;
  outline: none;
  color: #9fd0ff;
  font-family: var(--font-family-mono);
  font-size: 0.8rem;
  text-overflow: ellipsis;
}
.demo-url-bar .copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  flex-shrink: 0;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
  color: #cbd5e1;
  font-size: var(--font-size-xs);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}
.demo-url-bar .copy-btn:hover { background: rgba(14, 165, 233, 0.18); border-color: rgba(14, 165, 233, 0.5); color: #fff; }
.demo-url-bar .copy-btn.copied { background: rgba(16, 185, 129, 0.2); border-color: rgba(16, 185, 129, 0.5); color: #6ee7b7; }

/* image area */
.demo-image-area {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background:
    linear-gradient(45deg, var(--vc-surface-2) 25%, transparent 25%, transparent 75%, var(--vc-surface-2) 75%) 0 0 / 22px 22px,
    linear-gradient(45deg, var(--vc-surface-2) 25%, transparent 25%, transparent 75%, var(--vc-surface-2) 75%) 11px 11px / 22px 22px,
    var(--vc-surface);
  border: 1px solid var(--vc-edge);
  box-shadow: var(--shadow-md);
}
[data-theme="dark"] .demo-image-area { box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 12px 32px -20px rgba(0, 0, 0, 0.7); }

.demo-image-area img {
  max-width: 100%;
  max-height: 480px;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 30px -10px rgba(15, 23, 42, 0.35);
  transition: opacity var(--transition-base), filter var(--transition-base);
}

.demo-image-area .demo-loading {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(2px);
  z-index: 2;
}
[data-theme="dark"] .demo-image-area .demo-loading { background: rgba(7, 7, 14, 0.6); }
.demo-image-area.loading .demo-loading { display: flex; }
.demo-image-area.loading img { opacity: 0.4; }
.demo-loading .spinner-border { color: var(--vc-accent) !important; width: 2.25rem; height: 2.25rem; }

/* ops summary pills */
.demo-ops-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-top: 1rem;
  min-height: 1.6rem;
}
.demo-op-pill {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--vc-accent-strong);
  background: rgba(14, 165, 233, 0.09);
  border: 1px solid rgba(14, 165, 233, 0.22);
  border-radius: var(--radius-full);
  padding: 0.25rem 0.7rem;
}
[data-theme="dark"] .demo-op-pill { color: #7dd3fc; background: rgba(14, 165, 233, 0.14); border-color: rgba(14, 165, 233, 0.3); }
.demo-no-ops { color: var(--neutral-400); font-size: var(--font-size-sm); font-style: italic; }

/* inline CTA under preview */
.demo-preview .text-muted { color: var(--vc-text-muted) !important; }
.demo-preview .btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.5rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  color: #fff;
  background: var(--vc-grad-brand);
  box-shadow: 0 8px 20px -8px rgba(37, 99, 235, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.22);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.demo-preview .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -8px rgba(37, 99, 235, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.22); }

@media (max-width: 860px) {
  .demo-layout { grid-template-columns: 1fr; gap: 1.5rem; }
  .demo-preview { position: static; }
}

/* ════════════════════════ CTA ════════════════════════ */
.demo-cta {
  position: relative;
  text-align: center;
  padding: clamp(3.5rem, 7vw, 5rem) 1.5rem;
  background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 50%, #0ea5e9 100%);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.demo-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 40%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 80% at 50% 40%, #000, transparent 75%);
  pointer-events: none;
  z-index: -1;
}
.demo-cta::after {
  content: "";
  position: absolute;
  top: -30%;
  right: -8%;
  width: 420px;
  height: 420px;
  background: radial-gradient(closest-side, rgba(34, 211, 238, 0.45), transparent 70%);
  filter: blur(20px);
  pointer-events: none;
  z-index: -1;
}
.demo-cta .container { position: relative; z-index: 1; }
.demo-cta h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 0.85rem;
  text-wrap: balance;
}
.demo-cta p {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  opacity: 0.9;
  max-width: 500px;
  margin: 0 auto 2rem;
  line-height: 1.55;
}
.demo-cta .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.8rem 1.9rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), border-color var(--transition-base);
}
.demo-cta .btn-light { background: #fff; color: var(--vc-accent-strong); box-shadow: 0 12px 28px -10px rgba(0, 0, 0, 0.35); }
.demo-cta .btn-light:hover { transform: translateY(-2px); box-shadow: 0 18px 36px -10px rgba(0, 0, 0, 0.45); }
.demo-cta .btn-outline-light { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.4); color: #fff; backdrop-filter: blur(6px); }
.demo-cta .btn-outline-light:hover { transform: translateY(-2px); background: rgba(255, 255, 255, 0.2); border-color: #fff; }

/* theme cross-fade + reduced motion */
.demo-controls, .demo-image-area, .op-toggle, .op-param, .demo-op-pill {
  transition-property: background-color, border-color, color, box-shadow;
  transition-duration: var(--transition-base);
}
@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}