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

:root {
  --clr-bg: #f5f5f0;
  --clr-surface: #ffffff;
  --clr-text: #1a1a1a;
  --clr-text-secondary: #555;
  --clr-accent: #2563eb;
  --clr-accent-hover: #1d4ed8;
  --clr-border: #e0e0e0;
  --clr-group-gas: #dcfce7;
  --clr-group-heat: #fef3c7;
  --clr-group-equip: #e0e7ff;
  --clr-group-control: #fce7f3;
  --max-w: 1140px;
  --radius: 10px;
}

html {
  scroll-behavior: smooth;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--clr-text);
  background: var(--clr-bg);
  line-height: 1.6;
}

body {
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

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

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== HEADER ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--clr-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--clr-text);
  text-decoration: none;
  flex-shrink: 0;
}

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

.logo-icon {
  width: 34px;
  height: 34px;
  background: var(--clr-accent);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
}

.logo-text small {
  display: block;
  font-weight: 400;
  font-size: 0.7rem;
  color: var(--clr-text-secondary);
  letter-spacing: 0.02em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.main-nav a {
  color: var(--clr-text);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s;
}

.main-nav a:hover {
  color: var(--clr-accent);
  text-decoration: none;
}

.nav-cta {
  background: var(--clr-accent) !important;
  color: #fff !important;
  padding: 8px 20px;
  border-radius: 6px;
  font-weight: 600 !important;
  transition: background 0.15s !important;
}

.nav-cta:hover {
  background: var(--clr-accent-hover) !important;
}

.burger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}

.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-text);
  margin: 5px 0;
  transition: 0.3s;
}

/* ========== HERO ========== */
.hero {
  padding: 72px 0;
  background: linear-gradient(160deg, #0f172a 0%, #1e293b 60%, #334155 100%);
  color: #fff;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}

.hero-eyebrow {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #60a5fa;
  margin-bottom: 16px;
  font-weight: 600;
}

.hero h1 {
  font-size: 2.6rem;
  line-height: 1.12;
  font-weight: 800;
  margin-bottom: 20px;
}

.hero h1 em {
  font-style: normal;
  color: #60a5fa;
}

.hero-lead {
  font-size: 1.08rem;
  color: #cbd5e1;
  margin-bottom: 28px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 13px 26px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  text-decoration: none;
}

.btn:active {
  transform: scale(0.97);
}

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

.btn-primary:hover {
  background: var(--clr-accent-hover);
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
}

.btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
}

.hero-stats {
  display: flex;
  gap: 48px;
}

.hero-stat-number {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  color: #fff;
}

.hero-stat-label {
  font-size: 0.82rem;
  color: #94a3b8;
  margin-top: 4px;
}

.hero-image {
  height: 300px;
  border-radius: 12px;
  background: linear-gradient(135deg, #334155, #475569);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  font-size: 0.9rem;
}

/* ========== SECTION COMMON ========== */
.section {
  padding: 72px 0;
}

.section-alt {
  background: var(--clr-surface);
}

.section-blue {
  background: #eaf2fb;
}

.section-header {
  margin-bottom: 44px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
}

.section-header h2 em {
  font-style: normal;
  color: var(--clr-accent);
}

.section-header p {
  color: var(--clr-text-secondary);
  margin-top: 10px;
  max-width: 520px;
  font-size: 1rem;
}

/* ========== ADVANTAGES ========== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.advantage-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.advantage-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--clr-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.advantage-icon svg {
  width: 24px;
  height: 24px;
}

.advantage-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--clr-accent);
  line-height: 1.1;
  margin-bottom: 4px;
}

.advantage-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.advantage-card p {
  font-size: 0.85rem;
  color: var(--clr-text-secondary);
  line-height: 1.5;
}

/* ========== PROCESS ========== */
.process-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.process-step {
  text-align: center;
  padding: 24px;
}

.step-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--clr-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--clr-accent);
}

.process-step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  max-width: 280px;
  margin: 0 auto;
}

/* ========== DIRECTIONS ========== */
.directions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.direction-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

.direction-card:hover {
  border-color: var(--clr-accent);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
}

.direction-image {
  height: 130px;
  background: #e5e7eb;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #9ca3af;
  font-size: 0.82rem;
}

.direction-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.direction-body h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.direction-body p {
  font-size: 0.82rem;
  color: var(--clr-text-secondary);
  line-height: 1.5;
  flex: 1;
}

.direction-count {
  display: inline-block;
  margin-top: 14px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--clr-accent);
  background: rgba(37, 99, 235, 0.08);
  padding: 4px 12px;
  border-radius: 20px;
  align-self: flex-start;
}

/* ========== ABOUT ========== */
.about-content {
  max-width: 780px;
}

.about-content p {
  font-size: 1rem;
  color: var(--clr-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.about-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.about-meta-item {
  padding: 16px;
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
}

.about-meta-label {
  font-size: 0.75rem;
  color: var(--clr-text-secondary);
  margin-bottom: 4px;
}

.about-meta-value {
  font-size: 0.95rem;
  font-weight: 600;
}

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

.service-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.service-card:hover {
  border-color: var(--clr-accent);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
}

.service-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--clr-accent);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.3;
}

.service-card p {
  font-size: 0.82rem;
  color: var(--clr-text-secondary);
  line-height: 1.5;
}

.services-more {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}

/* ========== CONTACTS ========== */
.contacts-info {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: start;
}

.contacts-details {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-block {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.contact-block h3 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--clr-text-secondary);
  font-weight: 600;
  margin-bottom: 8px;
}

.contact-block p,
.contact-block a,
.contact-block address {
  font-size: 0.95rem;
  font-style: normal;
  line-height: 1.5;
}

.contact-block a {
  display: block;
}

.contact-block .muted {
  color: var(--clr-text-secondary);
  font-size: 0.85rem;
  margin-top: 4px;
}

.map-frame {
  width: 100%;
  height: 320px;
  border: 0;
  border-radius: var(--radius);
}

/* ========== FOOTER ========== */
.site-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-grid .logo {
  color: #fff;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.88rem;
}

.footer-links a:hover {
  color: #fff;
}

.footer-contacts a {
  display: block;
  color: #94a3b8;
  font-size: 0.88rem;
  margin-bottom: 6px;
}

.footer-contacts a:hover {
  color: #fff;
}

.footer-location {
  margin-top: 12px;
  font-size: 0.82rem;
  color: #64748b;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: #64748b;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero h1 {
    font-size: 2rem;
  }

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

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

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

  .contacts-info {
    grid-template-columns: 1fr;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    gap: 4px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--clr-surface);
    flex-direction: column;
    padding: 16px 24px;
    border-bottom: 1px solid var(--clr-border);
    gap: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  }

  .main-nav.active {
    display: flex;
  }

  .burger {
    display: block;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 48px 0;
  }

  .hero h1 {
    font-size: 1.6rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 16px;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .advantages-grid,
  .directions-grid {
    grid-template-columns: 1fr;
  }

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