:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --ink: #0b1526;
  --muted: #5c6b83;
  --line: #e4e9f2;
  --accent: #ff5c1f;
  --accent-soft: #ffe9df;
  --blue: #2f6bff;
  --blue-soft: #e8efff;
  --navy: #060d1d;
  --navy-2: #0b1730;
  --green: #1f9d55;
  --red: #d64545;
  --radius: 20px;
  --shadow-sm: 0 1px 2px rgba(11, 21, 38, 0.05), 0 4px 14px rgba(11, 21, 38, 0.06);
  --shadow-lg: 0 24px 64px rgba(11, 21, 38, 0.14);
  --font: "Onest", -apple-system, "Segoe UI", Roboto, sans-serif;
  --display: "Unbounded", var(--font);
  --open: 0.65;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}

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

a {
  color: var(--blue);
  text-decoration: none;
}

.wrap {
  width: min(1140px, calc(100% - 44px));
  margin: 0 auto;
}

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 16px;
  top: 16px;
  z-index: 99;
  background: #fff;
  padding: 10px 14px;
  border-radius: 10px;
}

h1,
h2 {
  font-family: var(--display);
  font-weight: 500;
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
}

h1 {
  font-size: clamp(1.85rem, 4.4vw, 2.9rem);
}

h2 {
  font-size: clamp(1.4rem, 3vw, 2.1rem);
}

h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

.lead {
  font-size: 1.12rem;
  color: var(--muted);
  max-width: 40em;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border: 0;
  border-radius: 14px;
  font: 600 1rem var(--font);
  white-space: nowrap;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ff8a4d);
  color: #fff;
  box-shadow: 0 10px 26px rgba(255, 92, 31, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 14px 34px rgba(255, 92, 31, 0.45);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.1);
  color: #f2f6ff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(8px);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.18);
}

.btn-dark {
  background: var(--ink);
  color: #fff;
}

.btn-blue {
  background: linear-gradient(135deg, #2f6bff, #5d8dff);
  color: #fff;
  box-shadow: 0 8px 22px rgba(47, 107, 255, 0.35);
}

.btn-blue:hover {
  box-shadow: 0 12px 30px rgba(47, 107, 255, 0.45);
}

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(6, 13, 29, 0.82);
  backdrop-filter: saturate(160%) blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 66px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-family: var(--display);
  font-size: 0.95rem;
  letter-spacing: 0.06em;
}

.logo:hover {
  text-decoration: none;
}

.logo svg {
  width: 32px;
  height: 32px;
}

.nav-links {
  display: flex;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: block;
  padding: 8px 9px;
  border-radius: 10px;
  color: rgba(240, 244, 255, 0.75);
  font-size: 0.82rem;
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  text-decoration: none;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-cta .tel {
  color: #fff;
  font-size: 0.86rem;
  font-weight: 600;
  white-space: nowrap;
}

.nav-cta .btn {
  padding: 10px 15px;
  font-size: 0.86rem;
}

.nav-mobile-extra {
  display: none;
}

.menu-btn {
  display: none;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  padding: 8px 12px;
  font: 600 0.85rem var(--font);
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  background: var(--navy);
  color: #f2f6ff;
  overflow: hidden;
  padding: 96px 0 110px;
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
}

.hero::before {
  width: 560px;
  height: 560px;
  right: -140px;
  top: -180px;
  background: radial-gradient(circle, rgba(255, 92, 31, 0.38), transparent 65%);
}

.hero::after {
  width: 520px;
  height: 520px;
  left: -160px;
  bottom: -220px;
  background: radial-gradient(circle, rgba(47, 107, 255, 0.32), transparent 65%);
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  font-size: 0.8rem;
  color: rgba(240, 244, 255, 0.85);
  margin-bottom: 22px;
}

.hero-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #3ddc84;
  box-shadow: 0 0 0 0 rgba(61, 220, 132, 0.6);
  animation: pulse 2s infinite;
}

.hero h1 span {
  background: linear-gradient(100deg, #ff8a4d, #ffb98a);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero .lead {
  color: rgba(226, 233, 246, 0.75);
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.hero-note {
  margin-top: 18px;
  font-size: 0.85rem;
  color: rgba(226, 233, 246, 0.55);
}

/* live widget */

.panel {
  position: relative;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 24px;
  padding: 24px;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
  font-size: 0.82rem;
  color: rgba(240, 244, 255, 0.7);
}

.panel-head .live {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #3ddc84;
  font-weight: 600;
}

.panel-head .live::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #3ddc84;
  animation: pulse 2s infinite;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.metric {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 14px;
}

.metric small {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(240, 244, 255, 0.55);
  margin-bottom: 6px;
}

.metric b {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(1rem, 1.1vw + 0.6rem, 1.35rem);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.metric[data-tone="cold"] b {
  color: #7fc4ff;
}

.metric[data-tone="heat"] b {
  color: #ff9a62;
}

.valve-track {
  margin-top: 18px;
}

.valve-track small {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: rgba(240, 244, 255, 0.55);
  margin-bottom: 8px;
}

.valve-bar {
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.valve-bar i {
  display: block;
  height: 100%;
  width: calc(var(--open) * 100%);
  border-radius: inherit;
  background: linear-gradient(90deg, #ff5c1f, #ffb98a);
  transition: width 0.4s ease;
}

.spark {
  margin-top: 18px;
}

.spark svg {
  width: 100%;
  height: 64px;
  display: block;
}

.spark polyline {
  fill: none;
  stroke: #7fc4ff;
  stroke-width: 2;
  stroke-linejoin: round;
}

.panel-caption {
  margin: 16px 0 0;
  font-size: 0.86rem;
  color: rgba(226, 233, 246, 0.7);
  min-height: 2.6em;
}

.chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  animation: float 6s ease-in-out infinite;
}

.chip-1 {
  top: -18px;
  right: 22px;
}

.chip-2 {
  bottom: -16px;
  left: -14px;
  animation-delay: -3s;
}

.chip .up {
  color: var(--green);
}

/* ---------- stats ---------- */

.stats-band {
  position: relative;
  margin-top: -46px;
  z-index: 2;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.stat b {
  display: block;
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.8rem;
  color: var(--ink);
}

.stat span {
  font-size: 0.88rem;
  color: var(--muted);
}

/* ---------- sections ---------- */

section {
  padding: 96px 0;
}

.section-head {
  max-width: 760px;
  margin-bottom: 44px;
}

.band {
  background: var(--surface);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.prose p {
  margin: 0 0 1em;
  color: var(--muted);
}

.prose p strong {
  color: var(--ink);
}

.quote {
  margin: 0;
  padding: 26px 28px;
  border-radius: var(--radius);
  background: var(--blue-soft);
  color: var(--ink);
  font-size: 1.05rem;
  line-height: 1.55;
}

.quote b {
  color: var(--blue);
}

.pillars {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.pillar {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 18px;
}

.pillar .num {
  flex: none;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  font-size: 0.9rem;
}

.pillar p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

.pillar h3 {
  margin: 0 0 2px;
  font-size: 0.98rem;
}

/* cards */

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

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.band .card {
  background: var(--bg);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.card .icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 16px;
}

.card .icon.blue {
  background: var(--blue-soft);
  color: var(--blue);
}

.card .icon svg {
  width: 22px;
  height: 22px;
}

.card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
}

/* frame for original schemes */

.frame {
  margin: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: var(--shadow-sm);
}

.frame img {
  width: 100%;
  border-radius: 12px;
}

.frame figcaption {
  padding: 12px 8px 2px;
  font-size: 0.82rem;
  color: var(--muted);
  text-align: center;
}

/* compare */

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.compare article {
  border-radius: var(--radius);
  padding: 30px;
}

.compare .off {
  background: #fdf1f1;
  border: 1px solid #f3d9d9;
}

.compare .on {
  background: #eefaf2;
  border: 1px solid #d3eedd;
}

.compare ul {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.compare li {
  position: relative;
  padding: 7px 0 7px 30px;
  color: #4a5568;
  font-size: 0.95rem;
}

.compare li::before {
  position: absolute;
  left: 0;
  top: 7px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.72rem;
  font-weight: 700;
}

.compare .off li::before {
  content: "✕";
  background: #f6dcdc;
  color: var(--red);
}

.compare .on li::before {
  content: "✓";
  background: #d4efdf;
  color: var(--green);
}

/* savings */

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

.save {
  position: relative;
  overflow: hidden;
  background: var(--navy-2);
  color: #fff;
  border-radius: var(--radius);
  padding: 34px 28px;
}

.save::after {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  right: -70px;
  bottom: -90px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 92, 31, 0.35), transparent 70%);
}

.save em {
  display: block;
  font-family: var(--display);
  font-style: normal;
  font-weight: 500;
  font-size: 2.6rem;
  background: linear-gradient(100deg, #ff8a4d, #ffcf9e);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.save h3 {
  position: relative;
  margin: 10px 0 0;
  font-size: 1.02rem;
}

.save p {
  position: relative;
  margin: 6px 0 0;
  font-size: 0.85rem;
  color: rgba(226, 233, 246, 0.65);
}

/* steps */

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

.step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  font-size: 0.95rem;
  color: var(--muted);
}

.step::before {
  counter-increment: st;
  content: counter(st);
  display: block;
  font-family: var(--display);
  font-size: 1.15rem;
  color: var(--accent);
  margin-bottom: 10px;
}

/* pricing */

.prices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: stretch;
}

.price {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 36px;
  display: flex;
  flex-direction: column;
}

.price .sum {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(2rem, 4vw, 2.7rem);
  margin: 10px 0 12px;
}

.price p {
  color: var(--muted);
  margin: 0 0 20px;
}

.price .btn {
  margin-top: auto;
  align-self: flex-start;
}

.price.featured {
  background: var(--navy);
  border-color: var(--navy);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.price.featured::after {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  right: -100px;
  top: -140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 92, 31, 0.32), transparent 70%);
}

.price.featured p {
  color: rgba(226, 233, 246, 0.7);
}

.price.featured .eyebrow {
  color: #ff9a62;
}

.price.featured .eyebrow::before {
  background: #ff9a62;
}

.price.featured > * {
  position: relative;
}

/* faq */

.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 4px 22px;
  margin-bottom: 10px;
  transition: border-color 0.2s ease;
}

.faq details[open] {
  border-color: #c9d6ec;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 14px 0;
  font-weight: 600;
  font-size: 0.98rem;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  flex: none;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 1.05rem;
  font-weight: 500;
  transition: transform 0.25s ease;
}

.faq details[open] summary::after {
  content: "–";
  transform: rotate(180deg);
}

.faq p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.94rem;
}

/* contacts */

.contact {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.contact-card {
  background: var(--navy);
  color: #fff;
  border-radius: 24px;
  padding: 36px;
  position: relative;
  overflow: hidden;
}

.contact-card::after {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  left: -120px;
  bottom: -180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(47, 107, 255, 0.35), transparent 70%);
}

.contact-card > * {
  position: relative;
}

.contact-card .eyebrow {
  color: #ff9a62;
}

.contact-card .eyebrow::before {
  background: #ff9a62;
}

.phones a {
  display: block;
  color: #fff;
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.35rem;
  margin: 6px 0;
}

.phones a:hover {
  color: #ff9a62;
  text-decoration: none;
}

.contact-card .mail {
  color: #7fc4ff;
}

.legal {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 36px;
}

.legal p {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.75;
}

/* footer */

footer {
  background: var(--navy);
  color: rgba(226, 233, 246, 0.6);
  padding: 26px 0;
  font-size: 0.84rem;
}

footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

footer a {
  color: rgba(226, 233, 246, 0.8);
}

/* ---------- animation ---------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
  transition-delay: var(--d, 0ms);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

@keyframes pulse {
  70% {
    box-shadow: 0 0 0 9px transparent;
  }
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-9px);
  }
}

/* ---------- responsive ---------- */

@media (max-width: 1280px) {
  .nav-cta .tel {
    display: none;
  }
}

@media (max-width: 980px) {
  .hero-inner,
  .split,
  .compare,
  .prices,
  .contact {
    grid-template-columns: 1fr;
  }

  .cards,
  .saves,
  .steps {
    grid-template-columns: 1fr 1fr;
  }

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

  .nav-links,
  .nav-cta .tel,
  .nav-cta .btn {
    display: none;
  }

  .nav-mobile-extra {
    display: list-item;
  }

  .menu-btn {
    display: block;
  }

  .nav.open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 66px;
    left: 16px;
    right: 16px;
    background: rgba(6, 13, 29, 0.97);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 16px;
    padding: 12px;
  }

  .hero {
    padding: 64px 0 96px;
  }

  .chip-2 {
    left: 8px;
  }
}

@media (max-width: 620px) {
  .cards,
  .saves,
  .steps,
  .stats,
  .metrics {
    grid-template-columns: 1fr;
  }

  section {
    padding: 68px 0;
  }
}

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

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}