/* USS Климат — cool arctic service palette */
:root {
  --night: #061524;
  --deep: #0a2f4a;
  --ocean: #0c4a6e;
  --sky: #38bdf8;
  --cyan: #22d3ee;
  --ice: #e0f2fe;
  --snow: #f0f9ff;
  --mist: #94a3b8;
  --ink: #0f172a;
  --card: #ffffff;
  --line: rgba(12, 74, 110, 0.12);
  --shadow: 0 24px 60px rgba(6, 21, 36, 0.12);
  --radius: 20px;
  --font-display: "Sora", system-ui, sans-serif;
  --font-body: "Figtree", system-ui, sans-serif;
  --header-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(56, 189, 248, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(34, 211, 238, 0.12), transparent 50%),
    var(--snow);
  min-height: 100vh;
}

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

a {
  color: var(--ocean);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--sky);
}

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1rem, 4vw, 3rem);
  background: rgba(240, 249, 255, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--night);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo em {
  font-style: normal;
  color: var(--ocean);
  font-weight: 600;
}

.logo-mark {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, var(--cyan), transparent 40%),
    linear-gradient(145deg, var(--sky), var(--ocean));
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.25);
  flex-shrink: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.35rem 1.25rem;
}

.nav a {
  text-decoration: none;
  color: var(--deep);
  font-weight: 500;
  font-size: 0.95rem;
}

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

.nav-cta {
  padding: 0.55rem 1rem;
  border-radius: 999px;
  background: var(--night);
  color: #fff !important;
}

.nav-cta:hover {
  background: var(--ocean);
  color: #fff !important;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 6px 4px;
  background: var(--night);
  border-radius: 2px;
  transition: 0.2s ease;
}

/* Hero */
.hero {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  padding: clamp(2.5rem, 6vw, 5rem) clamp(1rem, 4vw, 3rem) 3rem;
  max-width: 1180px;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ocean);
}

.hero h1 {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 5.5vw, 3.75rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--night);
}

.lead {
  margin: 0 0 1.75rem;
  max-width: 34rem;
  color: #334155;
  font-size: 1.12rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--ocean), #0369a1);
  color: #fff;
  box-shadow: 0 12px 30px rgba(12, 74, 110, 0.28);
}

.btn-primary:hover {
  color: #fff;
  background: linear-gradient(135deg, #0369a1, var(--sky));
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.7);
  border-color: var(--line);
  color: var(--deep);
}

.btn-ghost:hover {
  border-color: var(--sky);
  color: var(--ocean);
}

.btn-block {
  width: 100%;
}

.hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.hero-stats li {
  padding: 0.85rem 0.9rem;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.hero-stats strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--night);
}

.hero-stats span {
  font-size: 0.82rem;
  color: var(--mist);
}

/* Climate card visual */
.hero-visual {
  position: relative;
  min-height: 420px;
  display: grid;
  place-items: center;
}

.climate-card {
  position: relative;
  z-index: 2;
  width: min(100%, 360px);
  padding: 1.5rem 1.5rem 1.25rem;
  border-radius: 28px;
  background:
    linear-gradient(165deg, rgba(255, 255, 255, 0.95), rgba(224, 242, 254, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.climate-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.climate-label {
  font-size: 0.85rem;
  color: var(--mist);
  font-weight: 600;
}

.climate-mode {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.15);
  color: var(--ocean);
}

.temp-display {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0.15rem;
  margin: 0.25rem 0 0.5rem;
}

.temp-num {
  font-family: var(--font-display);
  font-size: 5.5rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(180deg, var(--night), var(--ocean));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.temp-unit {
  margin-top: 0.85rem;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--sky);
  font-size: 1.4rem;
}

.climate-arc {
  margin: 0 auto 1rem;
  max-width: 260px;
}

.arc-svg {
  width: 100%;
  height: auto;
  display: block;
}

.arc-track {
  fill: none;
  stroke: rgba(12, 74, 110, 0.12);
  stroke-width: 12;
  stroke-linecap: round;
}

.arc-value {
  fill: none;
  stroke: url(#none);
  stroke: var(--sky);
  stroke-width: 12;
  stroke-linecap: round;
  stroke-dasharray: 251;
  stroke-dashoffset: 90;
  filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.55));
  transition: stroke-dashoffset 0.6s ease;
}

.arc-labels {
  display: flex;
  justify-content: space-between;
  margin-top: -0.25rem;
  font-size: 0.75rem;
  color: var(--mist);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.climate-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.climate-meta div {
  text-align: center;
}

.climate-meta span {
  display: block;
  font-size: 0.7rem;
  color: var(--mist);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.climate-meta strong {
  font-size: 0.92rem;
  color: var(--deep);
}

.frost {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  background: radial-gradient(circle, rgba(56, 189, 248, 0.45), transparent 70%);
  animation: float 7s ease-in-out infinite;
}

.f1 { width: 140px; height: 140px; top: 8%; left: 4%; }
.f2 { width: 90px; height: 90px; bottom: 12%; right: 6%; animation-delay: -2s; }
.f3 { width: 60px; height: 60px; top: 40%; right: 18%; animation-delay: -4s; opacity: 0.7; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* Strip */
.strip {
  position: relative;
  z-index: 1;
  margin: 0 clamp(1rem, 4vw, 3rem) 1rem;
  padding: 1rem 1.25rem;
  border-radius: 14px;
  background: var(--night);
  color: rgba(224, 242, 254, 0.75);
  text-align: center;
  overflow: hidden;
}

.strip p {
  margin: 0;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
  animation: marquee 22s linear infinite;
}

@keyframes marquee {
  0% { transform: translateX(10%); }
  100% { transform: translateX(-10%); }
}

/* Sections */
.section {
  position: relative;
  z-index: 1;
  padding: clamp(3rem, 7vw, 5.5rem) clamp(1rem, 4vw, 3rem);
  max-width: 1180px;
  margin: 0 auto;
}

.section-alt {
  max-width: none;
  background: linear-gradient(180deg, rgba(224, 242, 254, 0.55), rgba(240, 249, 255, 0.2));
  border-block: 1px solid var(--line);
}

.section-alt > * {
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
}

.section-head {
  text-align: center;
  max-width: 40rem;
  margin: 0 auto 2.5rem;
}

.section-head-left {
  text-align: left;
  margin: 0;
  max-width: none;
}

.section-head h2,
.contact-copy h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--night);
}

.section-lead {
  margin: 0;
  color: #475569;
}

.cards {
  display: grid;
  gap: 1.25rem;
}

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

.card {
  padding: 1.5rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(6, 21, 36, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.card-icon {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--sky);
  margin-bottom: 1rem;
}

.card h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--night);
}

.card p {
  margin: 0;
  color: #475569;
  font-size: 0.98rem;
}

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

.model {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.model-featured {
  background: linear-gradient(165deg, var(--night), var(--deep));
  color: #e2e8f0;
  border-color: transparent;
  box-shadow: var(--shadow);
  transform: scale(1.02);
}

.model-featured h3,
.model-featured .model-price strong {
  color: #fff;
}

.model-featured .model-desc,
.model-featured li,
.model-featured .model-area {
  color: #94a3b8;
}

.model-featured .btn-primary {
  background: linear-gradient(135deg, var(--sky), var(--cyan));
  color: var(--night);
  box-shadow: none;
}

.model-badge {
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  background: var(--ice);
  color: var(--ocean);
  margin-bottom: 1rem;
}

.model-featured .model-badge {
  background: rgba(56, 189, 248, 0.2);
  color: var(--cyan);
}

.model h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.45rem;
  color: var(--night);
}

.model-area {
  margin: 0.25rem 0 0.75rem;
  font-weight: 600;
  color: var(--ocean);
  font-size: 0.95rem;
}

.model-desc {
  margin: 0 0 1rem;
  color: #475569;
  flex-grow: 0;
}

.model ul {
  margin: 0 0 1.25rem;
  padding: 0 0 0 1.1rem;
  color: #475569;
  font-size: 0.95rem;
  flex: 1;
}

.model li + li {
  margin-top: 0.35rem;
}

.model-price {
  margin: 0 0 1rem;
  color: #64748b;
  font-size: 0.95rem;
}

.model-price strong {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--night);
}

.fineprint {
  margin: 1.5rem 0 0;
  font-size: 0.85rem;
  color: var(--mist);
  text-align: center;
}

.fineprint.center {
  max-width: 1180px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 clamp(1rem, 4vw, 3rem) 2rem;
}

/* Benefits */
.benefits-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}

.benefit-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.benefit-list li {
  padding: 1.15rem 1.25rem;
  background: var(--card);
  border-radius: 16px;
  border: 1px solid var(--line);
}

.benefit-list strong {
  display: block;
  font-family: var(--font-display);
  margin-bottom: 0.35rem;
  color: var(--night);
}

.benefit-list span {
  color: #475569;
  font-size: 0.98rem;
}

/* Steps */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  counter-reset: step;
}

.steps li {
  position: relative;
  padding: 1.35rem 1.2rem 1.2rem;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  counter-increment: step;
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--sky);
  margin-bottom: 0.75rem;
}

.steps h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--night);
}

.steps p {
  margin: 0;
  font-size: 0.95rem;
  color: #475569;
}

/* FAQ */
.faq {
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  gap: 0.65rem;
}

.faq details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.25rem 1rem;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 0;
  font-weight: 600;
  color: var(--night);
  font-family: var(--font-display);
  font-size: 1rem;
}

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

.faq summary::after {
  content: "+";
  float: right;
  color: var(--sky);
  font-weight: 700;
}

.faq details[open] summary::after {
  content: "−";
}

.faq p {
  margin: 0 0 1rem;
  color: #475569;
  padding-right: 1.5rem;
}

/* Contact */
.contact-section {
  padding-bottom: 2rem;
}

.contact-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  overflow: hidden;
  border-radius: 28px;
  border: 1px solid var(--line);
  background: var(--card);
  box-shadow: var(--shadow);
}

.contact-copy {
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background:
    radial-gradient(600px 300px at 0% 100%, rgba(56, 189, 248, 0.2), transparent 60%),
    linear-gradient(160deg, var(--night), var(--deep));
  color: #e2e8f0;
}

.contact-copy .eyebrow {
  color: var(--cyan);
}

.contact-copy h2 {
  color: #fff;
}

.contact-copy > p {
  color: #94a3b8;
  margin: 0 0 1.25rem;
}

.contact-points {
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}

.contact-points li {
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.5rem;
  color: #cbd5e1;
  font-size: 0.95rem;
}

.contact-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--cyan);
}

.contact-direct {
  margin: 0;
  font-size: 0.95rem;
  color: #94a3b8;
}

.contact-direct a {
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}

.contact-direct a:hover {
  color: var(--cyan);
}

.contact-form {
  padding: clamp(1.5rem, 4vw, 2.5rem);
  display: grid;
  gap: 0.9rem;
}

.contact-form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--deep);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  font: inherit;
  font-weight: 400;
  color: var(--ink);
  background: var(--snow);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--sky);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
  background: #fff;
}

.form-note {
  margin: 0;
  font-size: 0.78rem;
  color: var(--mist);
  font-weight: 400;
}

.form-success {
  margin: 0;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  background: rgba(34, 211, 238, 0.12);
  color: var(--ocean);
  font-size: 0.92rem;
  font-weight: 500;
}

/* Footer */
.site-footer {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.75rem clamp(1rem, 4vw, 3rem) 2.25rem;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.5);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand strong {
  display: block;
  font-family: var(--font-display);
  color: var(--night);
}

.footer-brand span {
  font-size: 0.85rem;
  color: var(--mist);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-links a {
  text-decoration: none;
  color: var(--deep);
  font-weight: 500;
}

.footer-copy {
  margin: 0;
  width: 100%;
  text-align: center;
  font-size: 0.85rem;
  color: var(--mist);
}

/* Responsive */
@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
    min-height: 360px;
  }

  .cards-3,
  .models,
  .steps {
    grid-template-columns: 1fr;
  }

  .model-featured {
    transform: none;
  }

  .benefits-grid,
  .contact-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 1rem;
    background: rgba(240, 249, 255, 0.96);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(12px);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 0.85rem 0.5rem;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    margin-top: 0.5rem;
    text-align: center;
  }

  .nav-toggle {
    display: block;
  }

  .nav-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

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

  .temp-num {
    font-size: 4.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .frost, .strip p { animation: none; }
  .btn:hover { transform: none; }
}