:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --surface-soft: rgba(255, 255, 255, 0.7);
  --surface-dark: #0f1014;
  --surface-dark-soft: #171921;
  --text: #111111;
  --text-soft: rgba(17, 17, 17, 0.7);
  --text-inverse: rgba(255, 255, 255, 0.92);
  --text-inverse-soft: rgba(255, 255, 255, 0.68);
  --line: rgba(17, 17, 17, 0.08);
  --accent: #0071e3;
  --accent-soft: rgba(0, 113, 227, 0.12);
  --green: #30d158;
  --orange: #ff9f0a;
  --shadow: 0 24px 80px rgba(15, 16, 20, 0.08);
  --radius-xl: 40px;
  --radius-lg: 28px;
  --radius-md: 22px;
  --width: min(1200px, calc(100% - 32px));
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top center, rgba(0, 113, 227, 0.08), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f5f5f7 28%, #ededf1 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ─── Topbar ─── */

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  width: var(--width);
  margin: 0 auto;
  padding: 14px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.brand,
.topnav a,
.eyebrow,
.card-label,
.value-num {
  letter-spacing: -0.02em;
}

.brand {
  font-size: 1rem;
  font-weight: 700;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.92rem;
  color: var(--text-soft);
}

.topnav a:hover {
  color: var(--text);
}

.nav-cta {
  min-height: 38px;
  padding: 0 16px;
  font-size: 0.88rem;
}

/* ─── Global ─── */

.section {
  width: var(--width);
  margin: 0 auto;
  padding: 34px 0;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: rgba(17, 17, 17, 0.5);
}

h1, h2, h3 {
  margin: 0;
  letter-spacing: -0.05em;
}

h1 {
  font-size: clamp(3rem, 7vw, 5.6rem);
  line-height: 0.96;
  font-weight: 800;
}

h2 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1;
  font-weight: 800;
}

h3 {
  font-size: 1.35rem;
  line-height: 1.1;
  font-weight: 700;
}

p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.65;
  font-size: 1rem;
}

.actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  min-height: 48px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button.primary {
  background: var(--accent);
  color: #fff;
}

.button.primary:hover {
  background: #005bb5;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.75);
  border-color: rgba(17, 17, 17, 0.1);
}

.button.secondary:hover {
  background: rgba(255, 255, 255, 0.95);
}

.large-btn {
  min-height: 56px;
  padding: 0 32px;
  font-size: 1.05rem;
}

.section-head {
  margin-bottom: 28px;
}

.section-head.center {
  text-align: center;
}

.section-head.center h2 {
  margin: 0 auto;
  max-width: 18ch;
}

/* ─── Hero ─── */

.hero {
  min-height: calc(100vh - 68px);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 32px;
  align-items: center;
}

.hero-lead {
  max-width: 48ch;
  font-size: 1.12rem;
  margin-top: 18px;
}

.hero-proof,
.closing-proof {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-soft);
}

.proof-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
  animation: blink 2s ease-in-out infinite;
}

.closing-proof {
  justify-content: center;
  margin-top: 24px;
}

/* ─── Hero Demo (right side) ─── */

.hero-demo {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(180deg, #12131a 0%, #050506 100%);
  box-shadow: var(--shadow);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.demo-input {
  padding: 24px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.demo-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
  color: var(--text-inverse-soft);
}

.demo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.demo-dot.recording {
  background: #ff453a;
  animation: blink 1.5s ease-in-out infinite;
}

.demo-dot.generated {
  background: var(--green);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.demo-input blockquote {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-inverse);
  font-style: italic;
}

/* Arrow between input → output */
.demo-arrow-h {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 0;
  gap: 4px;
}

.demo-arrow-h svg {
  width: 100%;
  max-width: 180px;
  height: 20px;
  transform: rotate(90deg);
  opacity: 0.5;
}

.demo-arrow-h span {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

/* Output (dark theme, inside hero) */
.demo-output-dark {
  padding: 24px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(48, 209, 88, 0.2);
}

.demo-output-dark .demo-label {
  color: var(--text-inverse-soft);
}

.output-table-dark {
  display: grid;
  gap: 8px;
}

.output-row-dark {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
}

.output-row-dark span {
  font-size: 0.82rem;
  color: var(--text-inverse-soft);
}

.output-row-dark strong {
  font-size: 0.92rem;
  color: var(--text-inverse);
  font-weight: 600;
}

.status-orange {
  color: var(--orange) !important;
}

.output-ready {
  margin-top: 14px;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--green);
  letter-spacing: 0.02em;
}

/* ─── Pain Points ─── */

.pain {
  padding-top: 80px;
}

.pain-header {
  margin-bottom: 32px;
}

.pain-header h2 {
  max-width: 14ch;
}

.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 28px;
}

.pain-card {
  padding: 28px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.64));
  border: 1px solid rgba(17, 17, 17, 0.07);
  box-shadow: var(--shadow);
}

.pain-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(0, 113, 227, 0.08);
  color: var(--accent);
  margin-bottom: 16px;
}

.pain-card h3 {
  font-size: 1.15rem;
  line-height: 1.25;
  margin-bottom: 8px;
  color: var(--text);
}

.pain-card p {
  font-size: 0.95rem;
  color: var(--text-soft);
  line-height: 1.5;
}

.pain-bottom {
  text-align: center;
  padding: 36px;
  border-radius: 24px;
  background: linear-gradient(180deg, #171921 0%, #0f1014 100%);
}

.pain-insight {
  color: var(--text-inverse-soft);
  font-size: 1.1rem;
  line-height: 1.6;
  max-width: 56ch;
  margin: 0 auto;
}

.pain-insight strong {
  color: var(--text-inverse);
}

/* ─── Solution ─── */

.solution {
  padding-top: 80px;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: center;
}

.solution-content {
  padding: 36px;
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.68));
  border: 1px solid rgba(17, 17, 17, 0.08);
  box-shadow: var(--shadow);
}

.solution-lead {
  max-width: 44ch;
  font-size: 1.1rem;
  margin-top: 14px;
}

.solution-points {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.sol-point {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
}

.sol-check {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent-soft);
  flex-shrink: 0;
}

.solution-tagline {
  margin-top: 24px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text);
}

/* Integrations bar */
.integrations {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.integrations-label {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: rgba(17, 17, 17, 0.45);
  margin-bottom: 12px;
}

.integrations-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.integration-chip {
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(0, 113, 227, 0.06);
  border: 1px solid rgba(0, 113, 227, 0.12);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
}

/* Product photo */
.solution-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  min-height: 480px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 50% 40%, rgba(255, 255, 255, 0.06), transparent 40%),
    linear-gradient(180deg, #f8f8fa 0%, #ecedef 100%);
  border: 1px solid rgba(17, 17, 17, 0.06);
  overflow: hidden;
  padding: 40px;
}

.product-photo {
  width: min(320px, 80%);
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.15));
}

.product-caption {
  text-align: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}

.product-caption span {
  font-weight: 400;
  font-size: 0.82rem;
  color: var(--text-soft);
}

/* ─── Stats Banner ─── */

.stats-banner {
  width: 100%;
  margin: 48px 0;
  border-radius: 0;
  overflow: hidden;
}

.banner-img {
  width: 100%;
  height: auto;
  display: block;
}

/* ─── HVAC Scenarios ─── */

.scenarios {
  padding-top: 80px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.scenario-card {
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}

.scenario-type {
  padding: 14px 24px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-inverse);
  background: linear-gradient(135deg, #1a1d27 0%, #0f1014 100%);
}

.scenario-speech {
  padding: 22px 24px;
  background: linear-gradient(180deg, #1e2029 0%, #15171f 100%);
  font-size: 1.05rem;
  line-height: 1.45;
  font-weight: 600;
  font-style: italic;
  color: var(--text-inverse);
  letter-spacing: -0.02em;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex: 1;
}

.scenario-output {
  padding: 20px 24px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.82));
  display: grid;
  gap: 6px;
}

.scenario-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.03);
}

.scenario-row span {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-soft);
}

.scenario-row strong {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
  text-align: right;
}

.status-green {
  color: #1a8f3c !important;
}

/* ─── Value ─── */

.value {
  padding-top: 80px;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.value-card {
  padding: 28px;
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.64));
  border: 1px solid rgba(17, 17, 17, 0.08);
  box-shadow: var(--shadow);
}

.value-card.large {
  grid-column: span 2;
  background:
    radial-gradient(circle at top right, rgba(0, 113, 227, 0.1), transparent 40%),
    linear-gradient(180deg, #ffffff 0%, #eef5ff 100%);
}

.value-num {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 14px;
}

.value-card h3 {
  margin-bottom: 10px;
}

/* ─── Differentiator ─── */

.diff {
  padding-top: 40px;
}

.diff-panel {
  text-align: center;
  padding: 64px 32px;
  border-radius: 42px;
  background: linear-gradient(180deg, #171921 0%, #0f1014 100%);
  box-shadow: var(--shadow);
}

.diff-panel h2 {
  color: var(--text-inverse);
  max-width: none;
}

.diff-sub {
  margin-top: 16px;
  font-size: 1.15rem;
  color: var(--text-inverse-soft);
}

.diff-tagline {
  margin-top: 24px;
  font-size: 1.6rem;
  letter-spacing: -0.04em;
  color: var(--text-inverse-soft);
  line-height: 1.3;
}

.diff-tagline strong {
  color: var(--text-inverse);
  font-weight: 800;
}

/* ─── Closing CTA ─── */

.closing {
  padding-top: 40px;
  padding-bottom: 40px;
}

.closing-panel {
  padding: 56px;
  border-radius: 42px;
  background:
    radial-gradient(circle at top center, rgba(0, 113, 227, 0.14), transparent 32%),
    linear-gradient(180deg, #ffffff 0%, #eef2f8 100%);
  border: 1px solid rgba(17, 17, 17, 0.08);
  box-shadow: var(--shadow);
  text-align: center;
}

.closing-panel h2 {
  max-width: none;
}

.closing-sub {
  margin-top: 8px;
  font-size: 1.15rem;
}

.closing-price {
  margin-top: 24px;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text);
}

.closing-value {
  margin-top: 6px;
  font-size: 0.95rem;
  color: var(--accent);
  font-weight: 600;
}

.closing-panel .actions {
  justify-content: center;
}

/* ─── Footer ─── */

.footer {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.footer-inner {
  width: var(--width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-contact {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-soft);
}

.footer-contact a:hover {
  color: var(--accent);
}

.footer-sep {
  color: var(--line);
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-soft);
}

/* ─── Reveal Animation ─── */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ─── */

@media (max-width: 980px) {
  .hero,
  .solution {
    grid-template-columns: 1fr;
  }

  .pain-grid,
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .value-card.large {
    grid-column: span 2;
  }

  .hero-demo {
    min-height: auto;
  }

  .solution-visual {
    min-height: 360px;
  }

  .nav-cta {
    display: none;
  }
}

@media (max-width: 720px) {
  :root {
    --width: min(1200px, calc(100% - 20px));
  }

  .topbar {
    position: static;
    padding: 16px 0 6px;
    flex-wrap: wrap;
  }

  .topnav {
    gap: 12px;
    font-size: 0.85rem;
  }

  .section {
    padding: 24px 0;
  }

  .hero {
    min-height: auto;
    padding-top: 8px;
  }

  .pain-grid,
  .value-grid {
    grid-template-columns: 1fr;
  }

  .value-card.large {
    grid-column: span 1;
  }

  .hero-demo,
  .solution-visual,
  .solution-content,
  .closing-panel,
  .value-card,
  .pain-card,
  .demo-input,
  .demo-output-dark,
  .diff-panel,
  .pain-bottom {
    border-radius: 24px;
  }

  .hero-demo {
    padding: 20px;
  }

  .closing-panel {
    padding: 32px 24px;
  }

  .diff-panel {
    padding: 40px 24px;
  }

  .diff-tagline {
    font-size: 1.3rem;
  }

  .closing-price {
    font-size: 1.25rem;
  }

  .pain, .solution, .demo, .value, .scenarios {
    padding-top: 48px;
  }

  .solution-visual {
    min-height: 320px;
    padding: 28px;
  }

  .product-photo {
    width: min(240px, 70%);
  }
}