/* ==========================================================================
   VentPlus — clean-air editorial
   Palette: warm paper · deep forest ink · leaf green · CO₂ amber
   Type:    Fraunces (display) · Schibsted Grotesk (body) · IBM Plex Mono (data)
   ========================================================================== */

:root {
  /* core palette */
  --paper:       #f6f3ea;
  --paper-deep:  #efeadb;
  --ink:         #16352a;
  --ink-soft:    #3d5a4d;
  --leaf:        #4f9d69;
  --leaf-bright: #7ac142;
  --amber:       #e8a13c;
  --amber-deep:  #c97e1b;
  --danger:      #b5432f;
  --danger-deep: #842c1d;

  /* scene (SVG placeholder) colors */
  --scene-bg:    #dfe8da;
  --scene-light: #f3ecd2;
  --scene-mid:   #b9cdb4;
  --scene-dark:  #2c4a3a;
  --scene-paper: #f6f3ea;
  --scene-night: #22382f;
  --scene-glass: #e4eedf;
  --scene-leafy: #4f9d69;

  /* type */
  --font-display: "Fraunces", Georgia, serif;
  --font-body:    "Schibsted Grotesk", "Segoe UI", sans-serif;
  --font-mono:    "IBM Plex Mono", "Consolas", monospace;

  /* rhythm */
  --gutter: clamp(1.25rem, 5vw, 5rem);
  --radius: 18px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse 80% 60% at 70% -10%, rgba(122, 193, 66, 0.10), transparent),
    repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(22, 53, 42, 0.012) 2px, rgba(22, 53, 42, 0.012) 4px);
}

sub { font-size: 0.6em; vertical-align: baseline; position: relative; top: 0.18em; }

::selection { background: var(--leaf-bright); color: var(--ink); }

/* ==========================================================================
   Top bar
   ========================================================================== */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0.85rem var(--gutter);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(22, 53, 42, 0.12);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
}

.brand-logo { display: block; height: 42px; width: auto; }

.topnav {
  display: flex;
  gap: 1.5rem;
  margin-left: auto;
}

.topnav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  transition: color 0.2s;
}

.topnav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -4px;
  height: 2px;
  background: var(--leaf-bright);
  transition: right 0.25s ease;
}

.topnav a:hover { color: var(--ink); }
.topnav a:hover::after { right: 0; }

.ppm-chip {
  display: flex;
  align-items: baseline;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.4rem 0.85rem;
  border: 1.5px solid var(--ink);
  border-radius: 99px;
  background: var(--paper);
}

.ppm-dot {
  width: 8px; height: 8px;
  align-self: center;
  border-radius: 50%;
  background: var(--leaf-bright);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(122, 193, 66, 0.5); }
  50%       { box-shadow: 0 0 0 6px rgba(122, 193, 66, 0); }
}

.ppm-value { font-weight: 500; font-size: 1.05rem; }
.ppm-unit  { color: var(--ink-soft); font-size: 0.75rem; }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem var(--gutter) 6rem;
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.hero-inner { position: relative; max-width: 1100px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--leaf);
  margin-bottom: 2rem;
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 6.8vw, 3.75rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  max-width: none;
}

.hero-title span { display: block; white-space: nowrap; }

.hero-for {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 300;
  margin-top: 2.5rem;
  color: var(--ink-soft);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  line-height: 1.15;
}

.hero-for-lead { color: var(--ink-soft); }

.hero-for-link-sm { font-size: clamp(0.9rem, 4.5vw, 1.55rem); white-space: nowrap; }

.hero-for-link {
  color: var(--ink);
  font-weight: 500;
  text-decoration: none;
  border-bottom: 2px solid var(--leaf-bright);
  transition: background 0.2s, color 0.2s;
}

.hero-for-link:hover { background: var(--leaf-bright); color: var(--ink); }

.sep { margin: 0 0.6rem; color: var(--leaf); }

.hero-sub {
  max-width: 34rem;
  margin-top: 1.75rem;
  font-size: 1.1rem;
  color: var(--ink-soft);
}

.hero-cta { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.5rem; }

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  padding: 0.85rem 1.75rem;
  border-radius: 99px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s, color 0.2s;
}

.btn-solid { background: var(--ink); color: var(--paper); box-shadow: 0 2px 0 0 var(--ink); }
.btn-solid:hover { background: var(--leaf); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(22, 53, 42, 0.25); }

.btn-ghost { border: 1.5px solid var(--ink); color: var(--ink); }
.btn-ghost:hover { background: var(--paper-deep); transform: translateY(-2px); }

.btn-ghost-light { border: 2px solid var(--leaf-bright); color: var(--paper); }
.btn-ghost-light:hover { background: var(--leaf-bright); color: var(--ink); transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0, 0, 0, 0.3); }

.btn .arrow { transition: transform 0.2s ease; }
.btn:hover .arrow { transform: translateX(4px); }

/* hero CO₂ scale */
.hero-scale { position: relative; margin-top: 6rem; max-width: 1100px; }

.scale-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 5rem;
}

.scale-track {
  position: relative;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(90deg,
    var(--leaf-bright) 0%, var(--leaf-bright) 5%,
    var(--amber) 18%, var(--amber-deep) 46%,
    var(--danger) 78%, var(--danger-deep) 100%);
}

.scale-marker {
  position: absolute;
  left: var(--pos);
  top: -8px;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.scale-marker::before {
  content: "";
  width: 2px;
  height: 22px;
  background: var(--ink);
}

.scale-marker-alt { top: auto; bottom: -2px; flex-direction: column-reverse; }

.scale-marker i {
  font-family: var(--font-mono);
  font-style: normal;
  font-weight: 500;
  font-size: 1rem;
}

.scale-marker b { font-weight: 400; font-size: 0.8rem; color: var(--ink-soft); white-space: nowrap; }

.scale-ends {
  display: flex;
  justify-content: space-between;
  margin-top: 4.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* ==========================================================================
   Segments (A · B · C)
   ========================================================================== */

.segments { display: flex; flex-direction: column; }

.segment {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(2rem, 6vw, 6rem);
  align-items: center;
  padding: clamp(4rem, 10vh, 8rem) var(--gutter);
  border-top: 1px solid rgba(22, 53, 42, 0.12);
}

.segment-flip { grid-template-columns: 1fr 1.1fr; }
.segment-flip .segment-media { order: 2; }
.segment-flip .segment-copy  { order: 1; }

.segment-index {
  position: absolute;
  top: 1.5rem;
  right: var(--gutter);
  font-family: var(--font-display);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(8rem, 18vw, 16rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(22, 53, 42, 0.18);
  pointer-events: none;
  user-select: none;
}

.segment-flip .segment-index { right: auto; left: var(--gutter); }

.segment-media { position: relative; z-index: 1; }

.segment-media > img,
.media-placeholder,
.media-crop {
  width: 100%;
  aspect-ratio: 10 / 7;
  border-radius: var(--radius);
  object-fit: cover;
  display: block;
  box-shadow: 0 24px 48px -16px rgba(22, 53, 42, 0.3), 0 0 0 1px rgba(22, 53, 42, 0.08);
}

.media-placeholder, .media-crop {
  position: relative;
  overflow: hidden;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.media-crop img {
  position: absolute;
  width: 183.5%;
  max-width: none;
  height: auto;
  left: -8%;
  top: -23.8%;
}

.segment-media:hover .media-placeholder,
.segment-media:hover .media-crop,
.segment-media:hover > img {
  transform: rotate(-1deg) scale(1.015);
  box-shadow: 0 32px 64px -16px rgba(22, 53, 42, 0.4), 0 0 0 1px rgba(22, 53, 42, 0.08);
}

.scene { width: 100%; height: 100%; display: block; }
.scene-ppm { font-family: var(--font-mono); font-size: 17px; font-weight: 500; fill: var(--ink); }

.media-caption {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.75rem;
  border-radius: 99px;
  background: rgba(246, 243, 234, 0.92);
  color: var(--ink-soft);
}

.segment-copy { position: relative; z-index: 1; }

.segment-kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin-bottom: 0.75rem;
}

.segment-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  line-height: 1;
  letter-spacing: -0.02em;
}

.segment-subtitle {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.1rem, 2.2vw, 1.6rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink-soft);
  margin-top: 0.4rem;
}

.segment-tagline {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  color: var(--leaf);
  margin-top: 1rem;
}

.segment-body { max-width: 30rem; margin-top: 1.25rem; color: var(--ink-soft); font-size: 1.05rem; }
.segment-copy .btn { margin-top: 2rem; }

/* ==========================================================================
   Why CO₂  (dark band)
   ========================================================================== */

.why {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(5rem, 12vh, 9rem) var(--gutter);
  background-image:
    radial-gradient(circle at 85% 20%, rgba(122, 193, 66, 0.12), transparent 40%),
    radial-gradient(circle at 10% 90%, rgba(232, 161, 60, 0.10), transparent 45%);
}

.why-inner { max-width: 1100px; margin: 0 auto; }

.why-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.5rem, 3.2vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.why-lede { max-width: 42rem; font-size: 1.1rem; color: rgba(246, 243, 234, 0.8); margin-bottom: 3.5rem; }
.why-lede strong { color: var(--leaf-bright); }

.impact-table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(246, 243, 234, 0.18);
  border-radius: var(--radius);
  background: rgba(246, 243, 234, 0.03);
}

.impact-table { width: 100%; border-collapse: collapse; min-width: 640px; }

.impact-table th,
.impact-table td { text-align: left; padding: 1rem 1.5rem; border-bottom: 1px solid rgba(246, 243, 234, 0.12); }

.impact-table thead th {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(246, 243, 234, 0.6);
  border-bottom: 1px solid rgba(246, 243, 234, 0.3);
}

.impact-table tbody tr:last-child td { border-bottom: none; }
.impact-table tbody tr { transition: background 0.2s ease; }
.impact-table tbody tr:hover { background: rgba(246, 243, 234, 0.05); }
.impact-table td:first-child { font-family: var(--font-mono); font-weight: 500; font-size: 1.05rem; white-space: nowrap; }
.impact-table td:last-child { color: rgba(246, 243, 234, 0.8); }

.quality-badge { display: inline-block; font-size: 0.82rem; font-weight: 700; padding: 0.25rem 0.85rem; border-radius: 99px; white-space: nowrap; }

.level-excellent .quality-badge { background: var(--leaf-bright); color: var(--ink); }
.level-good      .quality-badge { background: var(--leaf);        color: var(--paper); }
.level-moderate  .quality-badge { background: var(--amber);       color: var(--ink); }
.level-poor      .quality-badge { background: var(--amber-deep);  color: var(--paper); }
.level-verypoor  .quality-badge { background: var(--danger);      color: var(--paper); }
.level-severe    .quality-badge { background: var(--danger-deep); color: var(--paper); }

.level-excellent td:first-child,
.level-good      td:first-child { color: var(--leaf-bright); }
.level-moderate  td:first-child { color: var(--amber); }
.level-poor      td:first-child { color: var(--amber); }
.level-verypoor  td:first-child,
.level-severe    td:first-child { color: #e07a5f; }

.why-note {
  margin-top: 3rem;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 300;
  text-align: center;
}

.why-note strong { font-weight: 600; font-style: italic; color: var(--leaf-bright); }

/* ==========================================================================
   How it works
   ========================================================================== */

.how { padding: clamp(5rem, 12vh, 9rem) var(--gutter); border-top: 1px solid rgba(22, 53, 42, 0.12); }

.how-inner { max-width: 1100px; margin: 0 auto; }

.how-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.25rem, 5vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.how-lede { max-width: 38rem; margin-top: 1.25rem; font-size: 1.1rem; color: var(--ink-soft); }

.how-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
  margin-top: 3.5rem;
}

.how-photo { position: sticky; top: 6rem; }

.how-photo img {
  width: 100%;
  display: block;
  border-radius: var(--radius);
  box-shadow: 0 24px 48px -16px rgba(22, 53, 42, 0.3), 0 0 0 1px rgba(22, 53, 42, 0.08);
}

.how-photo figcaption { margin-top: 1rem; font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-soft); text-align: center; }

.how-steps { display: flex; flex-direction: column; gap: 2rem; }

.how-step { display: flex; gap: 1.5rem; align-items: flex-start; }

.how-step-num {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--ink);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1.15rem;
}

.how-step h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.35rem; margin-bottom: 0.4rem; }
.how-step p  { color: var(--ink-soft); font-size: 1rem; }

/* models */
.models { margin-top: 4.5rem; }

.models-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin-bottom: 1.5rem;
}

.models-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; max-width: 640px; }

.model-card {
  padding: 1.75rem;
  border: 1.5px solid rgba(22, 53, 42, 0.2);
  border-radius: var(--radius);
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.model-card:hover { transform: translateY(-4px); border-color: var(--ink); }

.model-card-premium { border-color: var(--leaf); background: rgba(79, 157, 105, 0.06); }

.model-num { display: block; font-family: var(--font-mono); font-weight: 500; font-size: 1.35rem; margin-bottom: 0.5rem; }
.model-card-premium .model-num { color: var(--leaf); }
.model-card p { color: var(--ink-soft); font-size: 0.95rem; }

/* ==========================================================================
   Wi-Fi / Remote Monitoring section
   ========================================================================== */

.wifi-section {
  padding: clamp(5rem, 12vh, 9rem) var(--gutter);
  background: var(--paper-deep);
  border-top: 1px solid rgba(22, 53, 42, 0.12);
}

.wifi-inner { max-width: 1100px; margin: 0 auto; }

.section-kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin-bottom: 0.75rem;
}

.wifi-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 7vw, 6rem);
  align-items: start;
  margin-top: 3rem;
}

.wifi-features { display: flex; flex-direction: column; gap: 1.5rem; margin-top: 2.5rem; }

.wifi-feat { display: flex; gap: 1rem; align-items: flex-start; }

.wifi-feat-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  border: 1.5px solid rgba(22, 53, 42, 0.2);
  background: var(--paper);
}

.wifi-feat-icon svg { width: 20px; height: 20px; stroke: var(--leaf); }

.wifi-feat-text strong { display: block; font-weight: 700; font-size: 1rem; margin-bottom: 0.25rem; }
.wifi-feat-text span   { font-size: 0.93rem; color: var(--ink-soft); }

.wifi-flow-diagram {
  background: var(--ink);
  border-radius: var(--radius);
  padding: 2rem;
  color: var(--paper);
}

.wifi-flow-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(246, 243, 234, 0.55);
  margin-bottom: 1.75rem;
  text-align: center;
}

.flow-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.flow-node {
  padding: 1rem 1.1rem;
  border: 1px solid rgba(246, 243, 234, 0.18);
  border-radius: 12px;
  background: rgba(246, 243, 234, 0.04);
  text-align: center;
}

.flow-node strong {
  display: block;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 0.25rem;
}

.flow-node span { font-size: 0.78rem; color: rgba(246, 243, 234, 0.55); }

.flow-arrows {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.flow-arrow {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(246, 243, 234, 0.45);
  padding: 0.25rem 0;
}

.flow-cloud {
  padding: 1rem 1.5rem;
  border: 1px solid rgba(122, 193, 66, 0.4);
  border-radius: 12px;
  background: rgba(122, 193, 66, 0.07);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.flow-cloud strong { font-size: 0.95rem; font-weight: 700; color: var(--leaf-bright); display: block; margin-bottom: 0.2rem; }
.flow-cloud span   { font-size: 0.78rem; color: rgba(246, 243, 234, 0.6); }
.flow-cloud svg    { flex-shrink: 0; width: 28px; height: 28px; stroke: var(--leaf-bright); }

/* Remote monitoring screenshot */
.remote-screenshot {
  margin-top: 4rem;
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
}

.screenshot-browser {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 28px 56px -16px rgba(22, 53, 42, 0.35), 0 0 0 1px rgba(22, 53, 42, 0.1);
}

.screenshot-chrome {
  background: var(--ink);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.chrome-dot {
  width: 11px; height: 11px;
  border-radius: 50%;
}

.chrome-bar {
  flex: 1;
  height: 24px;
  background: rgba(246, 243, 234, 0.1);
  border-radius: 6px;
  margin-left: 0.5rem;
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: rgba(246, 243, 234, 0.4);
}

.screenshot-browser img { width: 100%; display: block; }

.screenshot-caption {
  text-align: center;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.mobile-note {
  margin-top: 2rem;
  padding: 1.25rem 1.75rem;
  border-left: 3px solid var(--leaf);
  background: rgba(79, 157, 105, 0.07);
  border-radius: 0 var(--radius) var(--radius) 0;
  max-width: 640px;
  font-size: 0.97rem;
  color: var(--ink);
}

.mobile-note strong { color: var(--leaf); }

/* ==========================================================================
   Specs table section
   ========================================================================== */

.specs-section {
  padding: clamp(5rem, 12vh, 9rem) var(--gutter);
  border-top: 1px solid rgba(22, 53, 42, 0.12);
}

.specs-inner { max-width: 1100px; margin: 0 auto; }

.specs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
  align-items: start;
}

.specs-table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(22, 53, 42, 0.15);
  border-radius: var(--radius);
}

.specs-table { width: 100%; border-collapse: collapse; min-width: 340px; }

.specs-table tr { border-bottom: 1px solid rgba(22, 53, 42, 0.1); }
.specs-table tr:last-child { border-bottom: none; }
.specs-table tr:hover { background: rgba(22, 53, 42, 0.03); }

.specs-table td {
  padding: 0.85rem 1.25rem;
  font-size: 0.95rem;
  vertical-align: top;
}

.specs-table td:first-child {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ink-soft);
  font-weight: 500;
  white-space: nowrap;
  width: 44%;
}

.specs-table td:last-child { color: var(--ink); font-weight: 500; }

.specs-table tr.specs-group td {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber-deep);
  background: rgba(22, 53, 42, 0.04);
  padding-top: 0.7rem;
  padding-bottom: 0.7rem;
}
.specs-table tr.specs-group:hover { background: rgba(22, 53, 42, 0.04); }

.specs-sub-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin-bottom: 1rem;
}

.specs-photo {
  position: sticky;
  top: 6rem;
}

.specs-photo img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: 0 24px 48px -16px rgba(22, 53, 42, 0.28), 0 0 0 1px rgba(22, 53, 42, 0.08);
}

.specs-photo figcaption {
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
  text-align: center;
}

.specs-note {
  margin-top: 1.75rem;
  padding: 1.25rem 1.5rem;
  background: rgba(79, 157, 105, 0.07);
  border: 1px solid rgba(79, 157, 105, 0.3);
  border-radius: var(--radius);
  font-size: 0.93rem;
  color: var(--ink-soft);
}

.specs-note strong { color: var(--leaf); }

/* ==========================================================================
   FAQ section
   ========================================================================== */

.faq-section {
  padding: clamp(5rem, 12vh, 9rem) var(--gutter);
  background: var(--paper-deep);
  border-top: 1px solid rgba(22, 53, 42, 0.12);
}

.faq-inner { max-width: 800px; margin: 0 auto; }

.faq-list { margin-top: 3rem; display: flex; flex-direction: column; }

.faq-item { border-bottom: 1px solid rgba(22, 53, 42, 0.12); }
.faq-item:first-child { border-top: 1px solid rgba(22, 53, 42, 0.12); }

.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  padding: 1.4rem 0;
  cursor: pointer;
  user-select: none;
  transition: color 0.2s;
}

.faq-q:hover { color: var(--leaf); }

.faq-q-text { font-weight: 600; font-size: 1.05rem; line-height: 1.4; }

.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid rgba(22, 53, 42, 0.25);
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  line-height: 1;
  transition: background 0.2s, border-color 0.2s, transform 0.3s;
  font-family: var(--font-mono);
  font-weight: 400;
}

.faq-item.open .faq-icon {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
  transform: rotate(45deg);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.22, 1, 0.36, 1), padding 0.3s;
  font-size: 0.98rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.faq-item.open .faq-a { max-height: 400px; padding-bottom: 1.4rem; }

/* ==========================================================================
   Contact form section
   ========================================================================== */

.contact-section {
  padding: clamp(5rem, 12vh, 9rem) var(--gutter);
  border-top: 1px solid rgba(22, 53, 42, 0.12);
}

.contact-inner { max-width: 1100px; margin: 0 auto; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(3rem, 7vw, 6rem);
  align-items: start;
  margin-top: 3rem;
}

.contact-info { display: flex; flex-direction: column; gap: 1.75rem; }

.contact-detail { display: flex; gap: 1rem; align-items: flex-start; }

.contact-detail-icon {
  flex-shrink: 0;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--paper-deep);
  border: 1.5px solid rgba(22, 53, 42, 0.15);
}

.contact-detail-icon svg { width: 20px; height: 20px; stroke: var(--leaf); fill: none; }

.contact-detail strong { display: block; font-weight: 700; font-size: 0.9rem; margin-bottom: 0.2rem; }

.contact-detail a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  border-bottom: 2px solid var(--leaf-bright);
  transition: color 0.2s;
}

.contact-detail a:hover { color: var(--leaf); }
.contact-detail p { font-size: 0.95rem; color: var(--ink-soft); line-height: 1.5; }

.contact-mfr {
  margin-top: 0.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--paper-deep);
  border-radius: var(--radius);
  border: 1px solid rgba(22, 53, 42, 0.12);
}

.contact-mfr strong { display: block; font-weight: 700; font-size: 0.95rem; margin-bottom: 0.5rem; }
.contact-mfr p { font-size: 0.9rem; color: var(--ink-soft); }

/* form */
.contact-form {
  background: var(--paper-deep);
  border: 1px solid rgba(22, 53, 42, 0.12);
  border-radius: var(--radius);
  padding: 2.5rem;
}

.contact-form h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.6rem;
  margin-bottom: 1.75rem;
  letter-spacing: -0.01em;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.form-group { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1rem; }

.form-group label { font-size: 0.85rem; font-weight: 600; color: var(--ink-soft); letter-spacing: 0.02em; }

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-body);
  font-size: 0.97rem;
  padding: 0.75rem 1rem;
  border: 1.5px solid rgba(22, 53, 42, 0.2);
  border-radius: 10px;
  background: var(--paper);
  color: var(--ink);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--leaf);
  box-shadow: 0 0 0 3px rgba(79, 157, 105, 0.15);
}

.form-group textarea { min-height: 110px; resize: vertical; }

.form-submit {
  width: 100%;
  padding: 1rem 2rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  border: none;
  border-radius: 99px;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
  margin-top: 0.5rem;
}

.form-submit:hover { background: var(--leaf); transform: translateY(-2px); }
.form-submit:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.form-note { margin-top: 0.85rem; font-size: 0.82rem; color: var(--ink-soft); text-align: center; }

.form-success {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
  padding: 2rem;
}

.form-success.visible { display: flex; }

.form-success svg { width: 48px; height: 48px; stroke: var(--leaf); }
.form-success h4 { font-family: var(--font-display); font-size: 1.5rem; font-weight: 500; }
.form-success p  { color: var(--ink-soft); max-width: 28rem; }

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
  background: var(--paper-deep);
  border-top: 1px solid rgba(22, 53, 42, 0.12);
  padding: 4rem var(--gutter) 2rem;
}

.footer-logo { display: block; height: 52px; width: auto; }

.footer-address { display: block; color: var(--ink-soft); font-size: 0.95rem; padding: 0.3rem 0; }

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  max-width: 1100px;
  margin: 0 auto;
}

.footer-brand p { margin-top: 1rem; color: var(--ink-soft); font-size: 0.95rem; }

.footer-col h3 {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--amber-deep);
  margin-bottom: 1.25rem;
}

.footer-col a {
  display: block;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.3rem 0;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-col a:hover { color: var(--ink); padding-left: 0.4rem; }

.footer-base {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  max-width: 1100px;
  margin: 3.5rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(22, 53, 42, 0.12);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
}

/* ==========================================================================
   Detail pages
   ========================================================================== */

.detail-hero {
  padding: clamp(4rem, 12vh, 8rem) var(--gutter) clamp(3rem, 8vh, 6rem);
  max-width: calc(1100px + 2 * var(--gutter));
}

.detail-hero-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.detail-hero-sub { max-width: 36rem; margin-top: 1.75rem; font-size: 1.15rem; color: var(--ink-soft); }
.detail-hero .hero-cta { margin-top: 2.5rem; }

.photo-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  min-height: 18rem;
  aspect-ratio: 4 / 3;
  border: 2px dashed rgba(22, 53, 42, 0.3);
  border-radius: var(--radius);
  background: rgba(22, 53, 42, 0.04);
  color: var(--ink-soft);
  text-align: center;
}
.photo-placeholder-icon { font-size: 2.5rem; line-height: 1; opacity: 0.7; }
.photo-placeholder-text { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; line-height: 1.5; }

.detail-section { padding: clamp(4rem, 10vh, 7rem) var(--gutter); border-top: 1px solid rgba(22, 53, 42, 0.12); }
.detail-section-tint { background: var(--paper-deep); }
.detail-section-dark {
  background: var(--ink);
  color: var(--paper);
  background-image:
    radial-gradient(circle at 85% 15%, rgba(122, 193, 66, 0.12), transparent 40%),
    radial-gradient(circle at 10% 90%, rgba(232, 161, 60, 0.10), transparent 45%);
}

.detail-narrow,
.detail-grid,
.chart-figure,
.who-strip,
.who-note,
.stat-cards,
.feel-rows,
.compromise { max-width: 1100px; margin-left: auto; margin-right: auto; }

.detail-h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.detail-body { max-width: 38rem; margin-top: 1.25rem; font-size: 1.1rem; color: var(--ink-soft); }
.detail-body strong { color: var(--ink); }
.detail-body-light { max-width: 38rem; margin-top: 1.25rem; font-size: 1.1rem; color: rgba(246, 243, 234, 0.8); }

.detail-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(2.5rem, 6vw, 6rem); align-items: start; }

.seal-list { list-style: none; margin-top: 1.75rem; display: flex; flex-direction: column; gap: 0.75rem; }
.seal-list li { display: flex; align-items: center; gap: 0.85rem; font-size: 1.05rem; font-weight: 500; }
.seal-check { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--leaf); color: var(--paper); font-size: 0.85rem; flex-shrink: 0; }

.detail-twist { margin-top: 1.75rem; padding: 1.25rem 1.5rem; max-width: 34rem; border-left: 3px solid var(--amber-deep); background: rgba(232, 161, 60, 0.08); border-radius: 0 var(--radius) var(--radius) 0; color: var(--ink); font-size: 1.05rem; }

.cost-cards-title { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 500; letter-spacing: 0.18em; text-transform: uppercase; color: var(--amber-deep); margin-bottom: 1.5rem; }
.cost-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.cost-card { padding: 1.5rem; border: 1.5px solid rgba(22, 53, 42, 0.18); border-radius: var(--radius); text-align: center; transition: transform 0.3s ease, border-color 0.3s ease; }
.cost-card:hover { transform: translateY(-4px); border-color: var(--ink); }
.cost-icon { display: block; font-size: 1.75rem; line-height: 1; margin-bottom: 0.75rem; color: var(--amber-deep); }
.cost-card p { font-weight: 500; font-size: 0.98rem; line-height: 1.35; }
.cost-note { margin-top: 1.25rem; font-size: 0.92rem; color: var(--ink-soft); }

.chart-figure { margin-top: 3rem; }
.chart-crop { overflow: hidden; border-radius: var(--radius); box-shadow: 0 24px 48px -16px rgba(22, 53, 42, 0.25), 0 0 0 1px rgba(22, 53, 42, 0.1); }
.chart-crop img { display: block; width: 100%; height: auto; margin-bottom: -1.5%; }
.chart-figure figcaption { margin-top: 1rem; font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-soft); text-align: center; }

.who-strip { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; margin-top: 3rem; }
.who-band { padding: 1.25rem 1.5rem; border-radius: var(--radius); border: 1px solid rgba(22, 53, 42, 0.12); }
.who-band i { display: block; font-family: var(--font-mono); font-style: normal; font-weight: 500; font-size: 1.15rem; margin-bottom: 0.4rem; }
.who-band span { font-size: 0.92rem; color: var(--ink-soft); }
.who-band-good { border-top: 4px solid var(--leaf-bright); }
.who-band-warn { border-top: 4px solid var(--amber); }
.who-band-bad  { border-top: 4px solid var(--danger); }
.who-band-good i { color: var(--leaf); }
.who-band-warn i { color: var(--amber-deep); }
.who-band-bad  i { color: var(--danger); }
.who-note { margin-top: 1.5rem; font-size: 0.95rem; color: var(--ink-soft); font-style: italic; }

.compromise { margin-top: 3rem; padding: 2rem 2.25rem; border: 1.5px solid var(--leaf); border-radius: var(--radius); background: rgba(79, 157, 105, 0.06); }
.compromise h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.5rem; margin-bottom: 0.6rem; }
.compromise p { color: var(--ink-soft); max-width: 44rem; }

.stat-cards { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1.25rem; margin-top: 3rem; }
.stat-card { padding: 1.75rem; border: 1px solid rgba(246, 243, 234, 0.18); border-radius: var(--radius); background: rgba(246, 243, 234, 0.04); transition: transform 0.3s ease, border-color 0.3s ease; }
.stat-card:hover { transform: translateY(-6px); border-color: rgba(246, 243, 234, 0.4); }
.stat-label { display: block; font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: rgba(246, 243, 234, 0.6); margin-bottom: 1rem; }
.stat-change { display: flex; align-items: baseline; gap: 0.85rem; font-family: var(--font-mono); font-weight: 500; }
.stat-before { font-size: 1.5rem; color: rgba(246, 243, 234, 0.45); text-decoration: line-through; text-decoration-thickness: 2px; text-decoration-color: var(--danger); }
.stat-arrow { color: rgba(246, 243, 234, 0.5); font-size: 1.25rem; }
.stat-after { font-size: 2.25rem; color: var(--leaf-bright); }
.stat-before i, .stat-after i { font-style: normal; font-size: 0.6em; opacity: 0.7; }

.feel-rows { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1.25rem; margin-top: 2rem; }
.feel-row { padding: 1.5rem 0; border-top: 1px solid rgba(246, 243, 234, 0.25); }
.feel-row h3 { font-family: var(--font-display); font-weight: 500; font-size: 1.3rem; margin-bottom: 0.4rem; }
.feel-row p { font-size: 0.95rem; color: rgba(246, 243, 234, 0.75); }

.timeline { max-width: 1100px; margin: 3.5rem auto 0; padding: 2rem 2.25rem 2.25rem; border: 1px solid rgba(22, 53, 42, 0.15); border-radius: var(--radius); background: var(--paper-deep); }
.timeline-title { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 2rem; }
.timeline-track { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* CO₂ level scale (markings as dividers, band label + impact text between them) */
.co2-scale-track { position: relative; display: grid; grid-template-columns: repeat(6, 1fr); margin-top: 1.9rem; }
.co2-scale-track::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--leaf-bright), var(--leaf), var(--amber), var(--amber-deep), var(--danger), var(--danger-deep));
  opacity: 0.55;
}
.co2-seg { position: relative; border-left: 2px solid currentColor; padding: 1.9rem 0.6rem 0 0.55rem; text-align: center; }
.co2-mark { position: absolute; top: 0.5rem; left: 0.45rem; font-family: var(--font-mono); font-weight: 500; font-size: clamp(0.9rem, 1.5vw, 1.2rem); line-height: 1; white-space: nowrap; }
.co2-mark i { font-style: normal; font-size: 0.58em; opacity: 0.6; margin-left: 0.12rem; }
.co2-quality { display: block; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; font-weight: 700; }
.co2-text { display: block; margin-top: 0.45rem; font-size: 0.85rem; color: var(--ink-soft); line-height: 1.4; }
.seg-excellent, .seg-good { color: var(--leaf); }
.seg-moderate { color: var(--amber-deep); }
.seg-poor, .seg-verypoor { color: var(--danger); }
.seg-severe { color: var(--danger-deep); }
.timeline-track::before { content: ""; position: absolute; top: 2.4rem; left: 2%; right: 2%; height: 3px; border-radius: 2px; background: linear-gradient(90deg, var(--leaf-bright), var(--amber), var(--amber-deep), var(--danger)); opacity: 0.6; }
.timeline-step { position: relative; display: flex; flex-direction: column; gap: 0.35rem; }
.timeline-time { font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-soft); }
.timeline-ppm { font-family: var(--font-mono); font-weight: 500; font-size: clamp(1.4rem, 2.5vw, 2rem); background: var(--paper-deep); align-self: flex-start; padding-right: 0.75rem; }
.timeline-ppm i { font-style: normal; font-size: 0.55em; opacity: 0.6; margin-left: 0.2rem; }
.tl-good { color: var(--leaf); }
.tl-warn { color: var(--amber-deep); }
.tl-poor { color: var(--danger); }
.tl-bad  { color: var(--danger-deep); }
.timeline-label { font-size: 0.92rem; color: var(--ink-soft); }

.callout { max-width: 1100px; margin: 3rem auto 0; display: flex; align-items: center; gap: clamp(1.5rem, 4vw, 3.5rem); padding: 2rem 2.25rem; border-left: 4px solid var(--danger); background: rgba(181, 67, 47, 0.06); border-radius: 0 var(--radius) var(--radius) 0; }
.callout-number { font-family: var(--font-display); font-weight: 600; font-size: clamp(2.75rem, 6vw, 4.5rem); line-height: 1; color: var(--danger); white-space: nowrap; flex-shrink: 0; }
.callout p { max-width: 36rem; font-size: 1.05rem; color: var(--ink); }

.venues { max-width: 1100px; margin: 3rem auto 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.venue-stat { padding: 1.25rem 1.5rem; border: 1px solid rgba(22, 53, 42, 0.15); border-radius: var(--radius); }
.venue-stat i { display: block; font-family: var(--font-mono); font-style: normal; font-weight: 500; font-size: 1.3rem; color: var(--amber-deep); margin-bottom: 0.4rem; }
.venue-stat span { font-size: 0.92rem; color: var(--ink-soft); }

.venue-chips { max-width: 1100px; margin: 3.5rem auto 0; display: flex; flex-wrap: wrap; gap: 0.75rem; }
.venue-chip { font-family: var(--font-mono); font-size: 0.88rem; padding: 0.5rem 1.15rem; border-radius: 99px; border: 1px solid rgba(246, 243, 234, 0.3); color: rgba(246, 243, 234, 0.85); transition: border-color 0.2s, background 0.2s; }
.venue-chip:hover { border-color: var(--leaf-bright); background: rgba(122, 193, 66, 0.1); }

.office-steps { margin-top: 2.5rem; }
.office-photo { position: static; }

.detail-cta { padding: clamp(5rem, 14vh, 9rem) var(--gutter); text-align: center; }
.detail-cta-title { font-family: var(--font-display); font-weight: 500; font-size: clamp(2.25rem, 5.5vw, 4rem); letter-spacing: -0.02em; }
.detail-cta .detail-body { margin-left: auto; margin-right: auto; }
.detail-cta-buttons { justify-content: center; margin-top: 2.5rem; }
.detail-cta-phone { margin-top: 1.5rem; font-size: 0.95rem; color: var(--ink-soft); }
.detail-cta-phone a { color: var(--ink); font-weight: 700; text-decoration: none; border-bottom: 2px solid var(--leaf-bright); }

/* ==========================================================================
   Section headings shared style
   ========================================================================== */

.section-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.section-sub { max-width: 42rem; font-size: 1.05rem; color: var(--ink-soft); margin-top: 0.75rem; }

/* ==========================================================================
   Reveal animations
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.in { opacity: 1; transform: translateY(0); }

.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
.reveal.d4 { transition-delay: 0.32s; }
.reveal.d5 { transition-delay: 0.40s; }
.reveal.d6 { transition-delay: 0.48s; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .ppm-dot { animation: none; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .topnav { display: none; }

  .segment, .segment-flip { grid-template-columns: 1fr; gap: 2.5rem; }
  .segment-flip .segment-media { order: 1; }
  .segment-flip .segment-copy  { order: 2; }
  .segment-index { font-size: 9rem; top: 0.5rem; }
  .hero { min-height: auto; padding-bottom: 8rem; }
  .scale-marker b { font-size: 0.7rem; }
  .scale-marker:last-child { left: min(var(--pos), 70%); }
  .how-grid { grid-template-columns: 1fr; }
  .how-photo { position: static; max-width: 420px; }
  .models-row { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .who-strip { grid-template-columns: 1fr; }
  .stat-cards { grid-template-columns: 1fr; }
  .feel-rows { grid-template-columns: 1fr; gap: 0; }
  .timeline-track { grid-template-columns: 1fr 1fr; row-gap: 2rem; }
  .timeline-track::before { display: none; }
  .co2-scale-track { grid-template-columns: 1fr 1fr; row-gap: 1.5rem; }
  .co2-scale-track::before { display: none; }
  .timeline-ppm { background: none; }
  .venues { grid-template-columns: 1fr; }
  .callout { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .footer-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .wifi-grid { grid-template-columns: 1fr; }
  .specs-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 540px) {
  .ppm-chip { display: none; }
  .hero-scale { margin-top: 3.5rem; }
  .brand-logo { height: 34px; }
  .scale-marker b { display: none; }
  .scale-marker i { font-size: 0.85rem; }
  .scale-title { margin-bottom: 2.5rem; }
  .scale-ends { margin-top: 2.5rem; }
  .contact-form { padding: 1.5rem; }
}

/* ── Breadcrumb navigation ── */
.breadcrumb {
  background: var(--paper-deep);
  padding: 0.6rem 2rem;
  border-bottom: 1px solid rgba(22,53,42,0.1);
}
.breadcrumb ol {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  max-width: 1100px;
}
.breadcrumb ol li + li::before {
  content: "›";
  margin-right: 0.5rem;
  color: var(--ink-soft);
  opacity: 0.5;
}
.breadcrumb ol a {
  color: var(--leaf);
  text-decoration: none;
}
.breadcrumb ol a:hover {
  text-decoration: underline;
}