@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 300;
  font-display: swap;
  src: url('fonts/plus-jakarta-sans-latin.woff2') format('woff2');
}
@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/plus-jakarta-sans-latin.woff2') format('woff2');
}
@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('fonts/plus-jakarta-sans-latin.woff2') format('woff2');
}
@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('fonts/plus-jakarta-sans-latin.woff2') format('woff2');
}
@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/plus-jakarta-sans-latin.woff2') format('woff2');
}
@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 800;
  font-display: swap;
  src: url('fonts/plus-jakarta-sans-latin.woff2') format('woff2');
}

body { font-family: 'Plus Jakarta Sans', sans-serif; }

:root {
  --ink: #0f172a;
  --muted: #64748b;
  --line: rgba(148, 163, 184, 0.18);
  --mist: #f8fafc;
  --green: #16a34a;
  --green-dark: #15803d;
  --accent-blue: #dbeafe;
}

.nav-logo {
  font-size: clamp(1.875rem, 2.75vw, 2.5rem);
  line-height: 1;
}

#navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.08);
}

#navbar.scrolled .nav-text,
#navbar.scrolled .nav-logo,
#navbar.scrolled #mobile-menu-btn {
  color: var(--ink);
}

input[type=range] { -webkit-appearance: none; width: 100%; background: transparent; }
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 24px;
  width: 24px;
  border-radius: 50%;
  background: var(--green);
  cursor: pointer;
  margin-top: -8px;
  box-shadow: 0 2px 8px rgba(22, 163, 74, 0.4);
  transition: transform 0.15s ease, background-color 0.15s ease;
}
input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.15); background: var(--green-dark); }
input[type=range]::-webkit-slider-runnable-track { width: 100%; height: 8px; cursor: pointer; background: #e2e8f0; border-radius: 4px; }
input[type=range]:focus { outline: none; }

.glass-panel {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.25);
}

.executive-hero {
  background: radial-gradient(circle at top left, rgba(22,163,74,0.18), transparent 28%),
              radial-gradient(circle at top right, rgba(14,165,233,0.16), transparent 24%),
              linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.executive-card {
  background: rgba(255,255,255,0.82);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(226,232,240,0.9);
  box-shadow: 0 20px 45px -28px rgba(15, 23, 42, 0.28);
}

.calculator-shell {
  background: linear-gradient(135deg, #ecfdf5 0%, #f8fafc 45%, #eff6ff 100%);
  border: 1px solid var(--line);
  box-shadow: 0 20px 45px -28px rgba(15, 23, 42, 0.28);
}

.calculator-range {
  --range-progress: 50%;
}

.calculator-range::-webkit-slider-runnable-track {
  background: linear-gradient(to right, var(--green) 0%, var(--green) var(--range-progress), #dbe3ec var(--range-progress), #dbe3ec 100%);
}

.calculator-range::-moz-range-track {
  height: 8px;
  cursor: pointer;
  background: #dbe3ec;
  border-radius: 4px;
}

.calculator-range::-moz-range-progress {
  height: 8px;
  background: var(--green);
  border-radius: 4px;
}

.calculator-range:focus-visible {
  outline: 3px solid rgba(22, 163, 74, 0.25);
  outline-offset: 5px;
}

.calculator-value {
  min-width: 3.5rem;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.calculator-value.is-changing,
.calculator-output.is-changing {
  animation: calculator-pop 260ms ease-out;
}

.calculator-result-card {
  transition: transform 0.26s ease, box-shadow 0.26s ease;
}

.calculator-result-card.is-changing {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px -20px rgba(15, 23, 42, 0.45);
}

@keyframes calculator-pop {
  0% { opacity: 0.7; transform: scale(0.97); }
  100% { opacity: 1; transform: scale(1); }
}

.product-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.12);
}

.product-modal-close:focus-visible {
  outline: 3px solid rgba(22, 163, 74, 0.35);
  outline-offset: 2px;
}

.diagram-stage-canvas {
  position: relative;
  width: 100%;
  aspect-ratio: 1200 / 700;
}

.diagram-stage-canvas > img,
.diagram-flow-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.diagram-stage-canvas > img {
  max-height: none;
}

.diagram-flow-overlay {
  pointer-events: none;
  overflow: visible;
  z-index: 2;
}

.diagram-flow-stream {
  fill: none;
  stroke-width: 9;
  stroke-linecap: round;
  stroke-dasharray: 14 34;
  animation: diagram-flow-dash 1.8s linear infinite;
}

.diagram-flow-warm {
  stroke: #f97316;
}

.diagram-flow-cold {
  stroke: #0284c7;
  animation-duration: 2.1s;
}

@keyframes diagram-flow-dash {
  to { stroke-dashoffset: -48; }
}

@media (prefers-reduced-motion: reduce) {
  .diagram-flow-stream {
    animation: none;
  }
}
.tech-tab-btn.active {
  background-color: var(--ink);
  color: #fff;
  border-color: var(--ink);
}

.price-note {
  font-size: 0.78rem;
  line-height: 1.35;
}

.data-rail {
  border-left: 1px solid rgba(148, 163, 184, 0.24);
}

.page-intro-kicker {
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 800;
}

.spec-list li + li { margin-top: 0.85rem; }

@keyframes ken-burns {
  0% { transform: scale(1); }
  100% { transform: scale(1.15); }
}

.animate-ken-burns {
  animation: ken-burns 25s ease-out infinite alternate;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}