/* Thermashift — analytical + modern B2B landing */

:root {
  --c-bg: #0a0e17;
  --c-surface: #111623;
  --c-surface-2: #161d2e;
  --c-border: rgba(94, 234, 255, 0.12);
  --c-text: #e8edf5;
  --c-muted: #8b9bb8;
  --c-accent: #2ee6d6;
  --c-accent-2: #f59e0b;
  --c-accent-3: #6366f1;
  --c-glow: rgba(46, 230, 214, 0.15);
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --max: 1120px;
  --header-h: 4rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  position: relative;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(46, 230, 214, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 230, 214, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 70%);
  pointer-events: none;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--c-border);
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  color: var(--c-text);
  text-decoration: none;
  text-transform: lowercase;
}

.logo.muted {
  color: var(--c-muted);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-surface);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  margin-inline: auto;
  background: var(--c-text);
  border-radius: 1px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.5rem 1.5rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  color: var(--c-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s;
}

.nav a:hover {
  color: var(--c-accent);
}

.nav-cta {
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(46, 230, 214, 0.35);
  color: var(--c-accent) !important;
  background: var(--c-glow);
}

.nav-cta:hover {
  background: rgba(46, 230, 214, 0.12);
}

.nav-portal {
  padding: 0.45rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(79, 77, 216, 0.45);
  color: #c4c2f2 !important;
  background: rgba(79, 77, 216, 0.12);
}

.nav-portal:hover {
  color: #e8edf5 !important;
  background: rgba(79, 77, 216, 0.22);
  border-color: rgba(79, 77, 216, 0.55);
}

.nav-portal--active {
  color: #e8edf5 !important;
  background: rgba(79, 77, 216, 0.28);
  border-color: rgba(79, 77, 216, 0.65);
  pointer-events: none;
}

/* Hero */

.hero {
  position: relative;
  z-index: 1;
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 3rem;
  overflow: hidden;
}

/* Hero background: smooth chart line scrolling left → right (seamless tile) */
.hero-chartscape {
  position: absolute;
  inset: -12% -8% 0;
  z-index: 0;
  pointer-events: none;
  mask-image: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.55) 0%,
    rgba(0, 0, 0, 0.85) 45%,
    rgba(0, 0, 0, 0.25) 100%
  );
  -webkit-mask-image: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.55) 0%,
    rgba(0, 0, 0, 0.85) 45%,
    rgba(0, 0, 0, 0.25) 100%
  );
}

.hero-chartscape__svg {
  position: absolute;
  width: 115%;
  min-width: 900px;
  height: auto;
  min-height: 120%;
  left: -8%;
  top: -5%;
  overflow: visible;
  opacity: 0.92;
}

.hero-chart-scroll-track {
  animation: heroChartScrollX 28s linear infinite;
  will-change: transform;
}

@keyframes heroChartScrollX {
  0% {
    transform: translate3d(0, 0, 0);
  }
  100% {
    transform: translate3d(-50%, 0, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero-chart-scroll-track {
    animation: none;
    transform: none;
  }
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: clamp(2rem, 4vw, 3.5rem);
  row-gap: 1.75rem;
  align-items: start;
}

.hero-compare-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  align-items: stretch;
}

.hero-copy-top {
  min-width: 0;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-accent-2);
  margin: 0 0 1rem;
}

.hero h1 {
  font-size: clamp(1.9rem, 3.2vw, 2.75rem);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
  max-width: 40ch;
}

.text-gradient {
  background: linear-gradient(120deg, var(--c-accent), var(--c-accent-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  color: var(--c-muted);
  max-width: 48ch;
  margin: 0 0 1.75rem;
  font-size: 1.05rem;
}

.lede strong {
  color: #c5d0e0;
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.25rem;
  border-radius: 999px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s, box-shadow 0.12s, background 0.12s;
}

.btn-primary {
  color: #041016;
  background: linear-gradient(135deg, var(--c-accent) 0%, #22c7b8 100%);
  box-shadow: 0 0 0 0 rgba(46, 230, 214, 0.4);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(46, 230, 214, 0.25);
}

.btn-ghost {
  color: var(--c-text);
  border-color: var(--c-border);
  background: var(--c-surface);
}

.btn-ghost:hover {
  border-color: rgba(46, 230, 214, 0.35);
  color: var(--c-accent);
}

.hero-meta {
  grid-column: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.9rem;
  color: var(--c-muted);
}

.hero-meta li {
  padding-left: 1rem;
  border-left: 2px solid var(--c-accent-3);
  margin-bottom: 0.5rem;
}

.mono {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  color: var(--c-accent);
}

/* Hero panel / chart */

.hero-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
}

.panel-card {
  background: linear-gradient(145deg, var(--c-surface) 0%, var(--c-surface-2) 100%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 1rem;
  box-shadow:
    0 0 0 1px rgba(99, 102, 241, 0.06) inset,
    0 24px 50px -24px rgba(0, 0, 0, 0.5);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.panel-title {
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.panel-pill {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: rgba(245, 158, 11, 0.15);
  color: var(--c-accent-2);
}

.chart {
  width: 100%;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--c-border);
  overflow: hidden;
}

.chart-svg {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: middle;
}

.chart-grid line {
  stroke: rgba(139, 155, 184, 0.15);
  stroke-width: 1;
}

.chart-grid--how line {
  stroke: rgba(139, 155, 184, 0.18);
}

.chart-axis {
  font-family: var(--font), system-ui, sans-serif;
  font-size: 8.5px;
  font-weight: 500;
  fill: rgba(139, 155, 184, 0.92);
}

.chart-axis--ylabel {
  font-family: var(--mono), ui-monospace, monospace;
  font-size: 8px;
  fill: rgba(232, 237, 245, 0.75);
}

.chart-axis--ytitle {
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.04em;
  fill: rgba(232, 237, 245, 0.55);
}

.chart-axis--ytitle-right {
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.05em;
  fill: rgba(245, 158, 11, 0.85);
}

.chart-axis--yright {
  font-size: 8px;
  fill: rgba(245, 158, 11, 0.8);
}

.chart-axis--xtitle {
  font-size: 8px;
  fill: rgba(139, 155, 184, 0.75);
}

.chart-axis--band {
  font-size: 7.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  fill: rgba(46, 230, 214, 0.45);
}

.chart-band-edge {
  stroke: rgba(46, 230, 214, 0.35);
  stroke-width: 1;
  stroke-dasharray: 4 3;
}

.line-price {
  stroke: url(#gLine);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.line-price--how {
  stroke: #f59e0b;
  stroke-width: 2.1;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.line-temp-how {
  stroke: var(--c-accent);
  stroke-width: 2.35;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.line-set {
  stroke: var(--c-accent-2);
  stroke-width: 2;
  stroke-dasharray: 6 4;
  stroke-linecap: round;
}

.panel-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--c-muted);
}

.panel-legend .dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  margin-right: 0.35rem;
  vertical-align: middle;
}

.dot-a {
  background: linear-gradient(90deg, var(--c-accent), var(--c-accent-3));
}

.dot-b {
  background: var(--c-accent-2);
}

.panel-foot {
  margin: 0.75rem 0 0;
  font-size: 0.65rem;
  color: var(--c-muted);
  opacity: 0.8;
}

/* Hero: cost comparison columns (no y-axis) */

.panel-card--compare {
  padding-bottom: 1.1rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.compare-bars {
  flex: 1;
  display: flex;
  flex-direction: row;
  align-items: stretch;
  justify-content: center;
  column-gap: clamp(0.5rem, 2vw, 1.25rem);
  padding: 0.5rem 0.25rem 0.25rem;
  min-height: 0;
}

.compare-bars__col {
  display: grid;
  grid-template-rows: 1fr auto;
  row-gap: 1.1rem;
  justify-items: center;
  align-items: end;
  flex: 1 1 0;
  min-width: 0;
  min-height: 0;
}

.compare-bars__track {
  position: relative;
  width: clamp(4.5rem, 11vw, 6rem);
  height: 100%;
  min-height: 12rem;
  margin: 0 auto 0;
  border-bottom: 1px solid rgba(94, 234, 255, 0.2);
  border-radius: 0;
  align-self: stretch;
}

.compare-bars__fill {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 0;
  border-radius: 7px 7px 2px 2px;
}

.compare-bars__fill--typical {
  background: linear-gradient(180deg, #5a6578 0%, #2f3848 100%);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.35) inset;
  animation: compareBarTypical 1.55s cubic-bezier(0.22, 1, 0.36, 1) 0.18s forwards;
}

.compare-bars__fill--smart {
  background: linear-gradient(180deg, #3be8d7 0%, #4f4dd8 100%);
  box-shadow: 0 0 24px rgba(46, 230, 214, 0.12);
  animation: compareBarSmart 1.55s cubic-bezier(0.22, 1, 0.36, 1) 0.55s forwards;
}

.compare-bars__label {
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-text);
  line-height: 1.3;
  padding-top: 0.15rem;
}

.compare-bars__mid {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 0.35rem;
  flex: 0 0 auto;
  align-self: stretch;
  box-sizing: border-box;
}

.compare-bars__pct {
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--c-accent-2);
  line-height: 1.1;
  text-shadow: 0 0 24px rgba(245, 158, 11, 0.25);
}

.compare-bars__saving {
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--c-muted);
  line-height: 1.35;
  margin-top: 0.3rem;
}

.compare-bars__foot {
  margin: 0.85rem 0 0;
  font-size: 0.65rem;
  color: var(--c-muted);
  line-height: 1.4;
  opacity: 0.9;
}

.compare-bars__foot strong {
  color: #a3b0c4;
  font-weight: 600;
}

@keyframes compareBarTypical {
  from {
    height: 0;
  }

  to {
    height: 100%;
  }
}

@keyframes compareBarSmart {
  from {
    height: 0;
  }

  to {
    height: 64%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .compare-bars__fill--typical,
  .compare-bars__fill--smart {
    animation: none;
  }

  .compare-bars__fill--typical {
    height: 100%;
  }

  .compare-bars__fill--smart {
    height: 64%;
  }
}

/* How: text + line chart model */

.how-model {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: start;
  margin-bottom: 2.5rem;
}

.how-model__text {
  max-width: none;
  margin-bottom: 0;
}

.how-model__text p {
  max-width: 52ch;
}

.how-model__viz {
  min-width: 0;
}

.panel-card--howchart {
  margin: 0;
  height: 100%;
}

.model-panels__grid--howchart {
  margin-bottom: 1.25rem;
  gap: 0.85rem;
}

.panel-card--howchart .model-panel {
  padding: 1rem 0.75rem 1.1rem;
  background: rgba(0, 0, 0, 0.2);
}

.panel-card--howchart .model-panel__icon:not(.model-panel__icon--stepnum) {
  width: 3.15rem;
  height: 3.15rem;
  margin-bottom: 0.6rem;
}

.panel-card--howchart .model-panel__icon svg {
  width: 2.45rem;
  height: 2.45rem;
}

.model-panel--step {
  align-items: center;
  text-align: center;
}

.model-panel--step .model-panel__label--step {
  max-width: min(100%, 18rem);
  margin-bottom: 0.4rem;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--c-text);
  line-height: 1.3;
}

.model-panel--step .model-panel__desc {
  margin: 0;
  max-width: min(100%, 20rem);
  font-size: 0.76rem;
  line-height: 1.45;
  font-weight: 400;
  color: var(--c-muted);
}

@media (max-width: 700px) {
  .model-panels__grid--howchart {
    margin-bottom: 1rem;
  }
}

@media (max-width: 900px) {
  .how-model {
    grid-template-columns: 1fr;
  }
}

.how-model--chartonly {
  grid-template-columns: 1fr;
  margin-bottom: 2rem;
}

.how-model__viz--full {
  width: 100%;
}

/* Model section: monochrome icon flows */

.model-intro {
  max-width: 36rem;
}

#model .section-head p {
  color: rgba(232, 237, 245, 0.75);
}

.model-flow {
  margin-bottom: 2.75rem;
}

.model-flow__title,
.model-panels .model-flow__title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(232, 237, 245, 0.55);
  margin: 0 0 1.25rem;
}

.model-flow__stack {
  position: relative;
  width: 100%;
  max-width: none;
  margin: 0 auto;
  padding: 1.1rem 0 0.5rem;
  overflow: visible;
}

.model-flow__diagram {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: none;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(0.75rem, 2.5vw, 1.35rem);
  align-items: center;
  padding: 1.55rem 0 1.75rem;
  min-height: 13rem;
  overflow: visible;
}

.model-flow__diagram-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
  pointer-events: none;
}

.model-flow__nodes {
  display: contents;
}

.model-flow__node {
  position: relative;
  z-index: 2;
  min-width: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  pointer-events: auto;
}

.model-flow__node .model-flow__iconcard {
  width: 100%;
  max-width: min(18.5rem, 100%);
}

.model-flow__iconcard {
  position: relative;
  z-index: 2;
  border-radius: var(--radius);
  border: 1px solid rgba(232, 237, 245, 0.22);
  background: linear-gradient(165deg, var(--c-surface) 0%, var(--c-surface-2) 100%);
  box-shadow:
    0 6px 28px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(99, 102, 241, 0.08) inset;
}

.model-flow__iconcard-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.48rem;
  padding: 0.88rem 0.6rem 0.95rem;
}

.model-flow__icon--card {
  margin-bottom: 0.35rem;
  background: rgba(232, 237, 245, 0.07);
  border-color: rgba(232, 237, 245, 0.24);
}

.model-flow__card-title {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.28;
  color: rgba(232, 237, 245, 0.96);
  letter-spacing: -0.01em;
}

.model-flow__card-data {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  width: 100%;
}

.model-flow__card-data-line {
  display: block;
  font-size: 0.78rem;
  line-height: 1.4;
  font-weight: 400;
  color: rgba(232, 237, 245, 0.72);
}

.model-flow__card-data-line strong {
  font-weight: 600;
  color: rgba(232, 237, 245, 0.88);
}

.model-flow__diagram-svg .model-flow__ring-flow {
  animation: modelLoopFlow 2.6s linear infinite;
}

@keyframes modelLoopFlow {
  to {
    stroke-dashoffset: -37;
  }
}

.model-flow__icon {
  width: 4rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(232, 237, 245, 0.18);
  background: rgba(232, 237, 245, 0.04);
  color: rgba(232, 237, 245, 0.92);
}

.model-flow__icon svg {
  width: 2.45rem;
  height: 2.45rem;
}

@media (prefers-reduced-motion: reduce) {
  .model-flow__diagram-svg .model-flow__ring-flow {
    animation: none;
  }
}

.model-panels {
  margin-bottom: 2.5rem;
}

.model-panels__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.model-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.25rem 0.85rem;
  border-radius: var(--radius);
  border: 1px solid rgba(232, 237, 245, 0.14);
  background: rgba(232, 237, 245, 0.03);
}

.model-panel__icon {
  width: 3.5rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  color: rgba(232, 237, 245, 0.9);
}

.model-panel__icon svg {
  width: 2.75rem;
  height: 2.75rem;
}

.model-panel__icon.model-panel__icon--stepnum {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  margin-bottom: 0.65rem;
  border-radius: 999px;
  font-family: var(--mono), ui-monospace, monospace;
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1;
  color: var(--c-accent);
  background: rgba(46, 230, 214, 0.12);
  border: 1px solid rgba(46, 230, 214, 0.28);
}

.model-panel__label {
  font-size: 0.82rem;
  line-height: 1.45;
  font-weight: 500;
  color: rgba(232, 237, 245, 0.78);
  max-width: 14ch;
  margin: 0 auto;
}

.panel-legend--mono {
  color: rgba(232, 237, 245, 0.65);
  gap: 1.25rem;
}

.panel-legend__item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.panel-legend__ico {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  opacity: 0.85;
}

.model-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.model-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.1rem 0.75rem;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  background: var(--c-surface);
}

.model-step__icon {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.6rem;
  color: rgba(232, 237, 245, 0.88);
}

.model-step__icon svg {
  width: 1.75rem;
  height: 1.75rem;
}

.model-step__t {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-text);
  margin-bottom: 0.25rem;
}

.model-step__d {
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--c-muted);
}

@media (max-width: 700px) {
  .model-panels__grid {
    grid-template-columns: 1fr;
  }

  .model-flow__stack {
    max-width: 100%;
    padding: 0.85rem 0.35rem 0.35rem;
  }

  .model-flow__diagram {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.4rem;
    padding: 1.25rem 0 1.4rem;
    min-height: 11rem;
  }

  .model-flow__node .model-flow__iconcard {
    max-width: 100%;
  }

  .model-flow__iconcard-inner {
    padding: 0.62rem 0.35rem 0.7rem;
    gap: 0.36rem;
  }

  .model-flow__card-title {
    font-size: 0.8rem;
  }

  .model-flow__card-data-line {
    font-size: 0.66rem;
  }

  .model-flow__icon {
    width: 3.45rem;
    height: 3.45rem;
  }

  .model-flow__icon svg {
    width: 2.1rem;
    height: 2.1rem;
  }

  .model-steps {
    grid-template-columns: 1fr;
  }
}

/* Sections */

.section {
  position: relative;
  z-index: 1;
  padding: 3.5rem 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(17, 22, 35, 0.5) 0%, rgba(10, 14, 23, 0) 100%);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2.5rem;
}

.section-head h2 {
  font-size: clamp(1.4rem, 2.2vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.section-head p {
  margin: 0;
  color: var(--c-muted);
}

/* Metrics */

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.stat {
  padding: 1.25rem 1.5rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.stat:hover {
  border-color: rgba(46, 230, 214, 0.25);
  box-shadow: 0 0 0 1px var(--c-glow);
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  margin-bottom: 0.35rem;
}

.stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 500;
  color: var(--c-text);
  margin-bottom: 0.25rem;
}

.stat-desc {
  font-size: 0.85rem;
  color: var(--c-muted);
}

/* Steps */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
  counter-reset: step;
}

@media (min-width: 768px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
}

.steps li {
  position: relative;
  padding: 1.5rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}

.step-num {
  display: block;
  font-size: 0.8rem;
  color: var(--c-accent-3);
  margin-bottom: 0.5rem;
}

.steps h3 {
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
  font-weight: 600;
}

.steps p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--c-muted);
}

/* Cards */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}

.card {
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  transition: transform 0.2s, border-color 0.2s;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.35);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--c-muted);
  font-size: 0.95rem;
}

/* Benefits — gradient #0A0E16 → #4F4DD8, light type */

.section-benefits {
  background: linear-gradient(180deg, #0a0e16 0%, #4f4dd8 100%);
  border: none;
}

.section-benefits .section-head--light h2 {
  color: #ffffff;
}

.section-benefits .section-head--light p {
  color: rgba(255, 255, 255, 0.88);
}

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  align-items: stretch;
}

@media (max-width: 900px) {
  .benefit-grid {
    grid-template-columns: 1fr;
  }
}

.benefit-box {
  margin: 0;
  padding: 1.5rem 1.4rem;
  background: #ffffff;
  border: 1px solid rgba(79, 77, 216, 0.12);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.benefit-box__icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  border-radius: var(--radius-sm);
  background: rgba(10, 14, 23, 0.08);
  color: var(--c-bg);
}

.benefit-box__icon svg {
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
}

.benefit-box__title {
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: #4f4dd8;
}

.benefit-box__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.65;
  color: #3d4d66;
}

.benefit-box__text strong {
  color: #1a2332;
  font-weight: 600;
}

.buildings-foot {
  margin: 1.75rem 0 0;
  padding: 1rem 1.25rem;
  font-size: 0.92rem;
  color: var(--c-muted);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
}

/* “Could this work for you?” checklist */

.fit-checklist {
  margin: 0;
  padding: 1.5rem 1.35rem 1.35rem;
  max-width: none;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: linear-gradient(145deg, var(--c-surface) 0%, var(--c-surface-2) 100%);
  box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.06) inset;
}

.fit-checklist__legend {
  padding: 0;
  margin: 0 0 1.1rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--c-text);
  letter-spacing: -0.02em;
}

.fit-checklist__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
  align-items: stretch;
}

.fit-checklist__list > li {
  display: flex;
  min-width: 0;
}

.fit-check {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  cursor: pointer;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-border);
  background: rgba(0, 0, 0, 0.2);
  transition: border-color 0.15s, background 0.15s;
  flex: 1;
  min-height: 100%;
  box-sizing: border-box;
}

@media (max-width: 900px) {
  .fit-checklist__list {
    grid-template-columns: 1fr;
  }
}

.fit-check:hover {
  border-color: rgba(46, 230, 214, 0.22);
  background: rgba(46, 230, 214, 0.04);
}

.fit-check:focus-within {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

.fit-check__input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  clip: rect(0, 0, 0, 0);
}

.fit-check__box {
  flex-shrink: 0;
  width: 1.35rem;
  height: 1.35rem;
  margin-top: 0.15rem;
  border-radius: 5px;
  border: 2px solid rgba(139, 155, 184, 0.55);
  background: var(--c-bg);
  display: grid;
  place-items: center;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}

.fit-check__box::after {
  content: "";
  width: 0.35rem;
  height: 0.65rem;
  border: solid var(--c-bg);
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg) translate(-0.05rem, -0.05rem);
  opacity: 0;
  transition: opacity 0.12s;
}

.fit-check__input:checked + .fit-check__box {
  border-color: var(--c-accent);
  background: linear-gradient(135deg, var(--c-accent) 0%, #22c7b8 100%);
  box-shadow: 0 0 16px rgba(46, 230, 214, 0.25);
}

.fit-check__input:checked + .fit-check__box::after {
  opacity: 1;
  border-color: #041016;
}

.fit-check__copy {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.fit-check__title {
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--c-text);
}

.fit-check__desc {
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--c-muted);
}

.subsection {
  margin-bottom: 1.75rem;
  max-width: 48rem;
}

.subsection-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  color: var(--c-text);
}

.subsection-lead {
  margin: 0;
  color: var(--c-muted);
  font-size: 0.98rem;
  line-height: 1.65;
}

.how-model__note {
  margin: 0;
  color: var(--c-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.example-case {
  margin-top: 0.5rem;
}

.example-case__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem 2rem;
}

@media (max-width: 700px) {
  .example-case__grid {
    grid-template-columns: 1fr;
  }
}

.example-case__h {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-muted);
  margin: 0 0 0.65rem;
  font-weight: 600;
}

.example-case__list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--c-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.example-case__list li {
  margin-bottom: 0.4rem;
}

.example-case__disclaimer {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--c-border);
  font-size: 0.75rem;
  color: #6b7d96;
  line-height: 1.5;
}

/* CTA */

.cta {
  padding-bottom: 4rem;
}

.cta-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 2rem 2.25rem;
  border-radius: var(--radius);
  border: 1px solid rgba(46, 230, 214, 0.2);
  background:
    radial-gradient(ellipse 100% 120% at 100% 0%, rgba(99, 102, 241, 0.12) 0%, transparent 55%),
    var(--c-surface);
}

.cta-inner h2 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  margin: 0 0 0.5rem;
}

.cta-inner > div:first-child p {
  margin: 0;
  color: var(--c-muted);
  max-width: 40ch;
}

.cta-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.75rem;
  flex-shrink: 0;
}

.cta-mail {
  font-size: 0.9rem;
  color: var(--c-accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 230, 214, 0.35);
  padding-bottom: 2px;
}

.cta-mail:hover {
  color: #5ef0e2;
  border-color: var(--c-accent);
}

/* Model portal (standalone page) */

.portal-main {
  position: relative;
  z-index: 1;
  min-height: calc(100vh - var(--header-h) - 12rem);
  padding: clamp(2rem, 5vw, 3.5rem) 0 4rem;
}

.portal-page {
  max-width: 1200px;
  margin: 0 auto;
}

.portal-hero {
  max-width: 48rem;
  margin-bottom: 2rem;
}

.portal-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 2rem 2.5rem;
  align-items: start;
}

.portal-split__left {
  min-width: 0;
}

.portal-split__right {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.portal-chart-wrap {
  padding: 1.1rem 1.15rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  background: linear-gradient(145deg, var(--c-surface) 0%, rgba(22, 26, 40, 0.9) 100%);
  box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.06) inset;
}

.portal-chart-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
  color: var(--c-text);
  letter-spacing: -0.02em;
}

.portal-chart-hint {
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--c-muted);
  margin: 0 0 0.75rem;
}

.portal-chart-canvas {
  position: relative;
  height: 220px;
  width: 100%;
}

.portal-chart-canvas--tall {
  height: 280px;
}

.portal-form__h {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.9rem;
  color: var(--c-text);
  letter-spacing: -0.02em;
}

.portal-form__h + .portal-form__grid {
  margin-bottom: 1.1rem;
}

.portal-chart-zoom-hint {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--c-muted);
  margin: 0 0 0.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.75rem;
}

.portal-chart-zoom-hint kbd {
  font-family: var(--font-mono, ui-monospace, monospace);
  font-size: 0.8em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--c-border);
}

.portal-chart-zoom-hint--inline {
  margin-bottom: 0.5rem;
}

.portal-chart-reset {
  font-size: 0.85rem;
  padding: 0.25rem 0.65rem;
}

.portal-data-charts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  align-items: stretch;
}

.portal-data-charts--opt {
  margin-bottom: 1.5rem;
}

.portal-weather-dual {
  grid-column: 1 / -1;
  margin-top: 0.5rem;
}

.portal-opt-section {
  margin-top: 0.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--c-border);
}

.portal-section-title {
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
  margin: 0 0 0.5rem;
  color: var(--c-text);
  letter-spacing: -0.02em;
}

.portal-section-lede {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--c-muted);
  max-width: 55ch;
  margin: 0 0 1.5rem;
}

.portal-model-summary-wrap {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-border);
}

.portal-model-summary-wrap .portal-chart-title {
  margin-bottom: 0.5rem;
}

.portal-summary-footnote {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--c-muted);
  max-width: 60ch;
  margin: 0 0 1rem;
}

.portal-summary-table-wrap {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  background: rgba(0, 0, 0, 0.12);
}

.portal-summary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.portal-summary-table th,
.portal-summary-table td {
  text-align: left;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid rgba(232, 237, 245, 0.08);
}

.portal-summary-table th {
  font-weight: 600;
  color: var(--c-text);
  background: rgba(255, 255, 255, 0.03);
}

.portal-summary-table td:last-child {
  font-variant-numeric: tabular-nums;
  color: #e8edf5;
}

.portal-summary-table tbody tr:last-child td {
  border-bottom: none;
}

.portal-chart-wrap--full {
  margin-top: 0.5rem;
}

@media (max-width: 900px) {
  .portal-data-charts {
    grid-template-columns: 1fr;
  }
}

.portal-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
  color: var(--c-text);
}

.portal-lede {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--c-muted);
}

.portal-form {
  max-width: none;
  margin-bottom: 2.25rem;
  padding: 1.75rem 1.5rem 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--c-border);
  background: linear-gradient(145deg, var(--c-surface) 0%, var(--c-surface-2) 100%);
  box-shadow: 0 0 0 1px rgba(99, 102, 241, 0.06) inset;
}

.portal-form__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem 1rem;
}

.portal-field {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.portal-field--span {
  grid-column: 1 / -1;
}

.portal-field__label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.portal-field__input {
  padding: 0.65rem 0.85rem;
  font-size: 1rem;
  font-family: var(--font);
  color: var(--c-text);
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(232, 237, 245, 0.12);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.portal-field__input::placeholder {
  color: rgba(139, 155, 184, 0.7);
}

.portal-field__input:hover {
  border-color: rgba(46, 230, 214, 0.2);
}

.portal-field__input:focus {
  outline: none;
  border-color: rgba(46, 230, 214, 0.45);
  box-shadow: 0 0 0 3px rgba(46, 230, 214, 0.12);
}

.portal-form__actions {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(232, 237, 245, 0.08);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.portal-form__run {
  flex: 1 1 12rem;
  justify-content: center;
  text-align: center;
}

.portal-status {
  margin: 1rem 0 0;
  min-height: 1.5em;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--c-muted);
}

.portal-status--warn {
  color: #fbbf24;
}

.portal-status--ok {
  color: var(--c-accent);
}

@media (max-width: 540px) {
  .portal-form__grid {
    grid-template-columns: 1fr;
  }

  .portal-field--span {
    grid-column: 1;
  }
}

@media (max-width: 900px) {
  .portal-split {
    grid-template-columns: 1fr;
  }

  .portal-split__right {
    order: 2;
  }
}

/* Footer */

.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--c-border);
  padding: 2rem 0 2.5rem;
}

.footer-inner {
  text-align: center;
}

.footer-note {
  font-size: 0.9rem;
  color: var(--c-muted);
  margin: 0.5rem 0 0.75rem;
}

.footer-legal {
  font-size: 0.75rem;
  color: #5c6a82;
  margin: 0;
  max-width: 480px;
  margin-inline: auto;
}

/* Mobile */

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-compare-row {
    grid-template-columns: 1fr;
    display: flex;
    flex-direction: column-reverse;
    gap: 1.75rem;
  }

  .hero-meta {
    grid-column: 1;
  }

  .stat-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.25rem;
    background: var(--c-bg);
    border-bottom: 1px solid var(--c-border);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.2s, opacity 0.2s, visibility 0.2s;
  }

  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav a {
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--c-border);
  }

  .nav-portal {
    text-align: center;
  }

  .nav-cta {
    text-align: center;
    margin-top: 0.5rem;
    border: 1px solid rgba(46, 230, 214, 0.35) !important;
  }

  .cta-inner {
    padding: 1.5rem;
  }

  .cta-actions {
    align-items: stretch;
    width: 100%;
  }

  .cta-actions .btn-primary {
    width: 100%;
    text-align: center;
  }

  .cta-mail {
    text-align: center;
  }
}