/* ============================================================
   Урал Аргон — главный CSS
   Стиль: тёмно-синий + оранжевый (индустриальный)
   ============================================================ */

:root {
  --bg:        #0B0F1A;
  --bg-2:      #131824;
  --card:      #1A2030;
  --border:    #2A3348;
  --text:      #E6EAF2;
  --muted:     #8B95AB;
  --accent:    #FF7A18;
  --accent-2:  #FF9A45;
  --accent-dim:rgba(255,122,24,0.12);

  --radius:    14px;
  --radius-lg: 20px;
  --container: 1200px;
  --shadow:    0 12px 40px rgba(0,0,0,0.35);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ─────── Заголовки секций ─────── */
.section-title {
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}
.section-sub {
  color: var(--muted);
  max-width: 640px;
  margin-bottom: 40px;
  font-size: 17px;
}

/* ─────── Кнопки ─────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  transition: transform .12s ease, background .18s, border-color .18s;
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0B0F1A;
  font-weight: 700;
}
.btn--primary:hover { filter: brightness(1.08); }

.btn--outline {
  border-color: var(--border);
  color: var(--text);
  background: rgba(255,255,255,0.03);
}
.btn--outline:hover { border-color: var(--accent); color: var(--accent); }

.btn--outline-light {
  border-color: rgba(255,255,255,0.35);
  color: #fff;
}
.btn--outline-light:hover { background: rgba(255,255,255,0.1); }

.btn--lg { padding: 15px 28px; font-size: 16px; }
.btn--full { width: 100%; }

/* ═══════════ ШАПКА ═══════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11,15,26,0.9);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 72px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.02em;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0B0F1A;
  border-radius: 10px;
  font-weight: 900;
  font-size: 15px;
}
.logo-text span { color: var(--accent); }

.nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
  font-size: 15px;
}
.nav a {
  color: var(--muted);
  transition: color .15s;
}
.nav a:hover { color: var(--text); }

.header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}
.phone {
  font-weight: 700;
  font-size: 16px;
  color: var(--text);
  white-space: nowrap;
}
.phone:hover { color: var(--accent); }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  margin-left: auto;
}
.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* ═══════════ HERO ═══════════ */
.hero {
  padding: 90px 0 70px;
  background:
    radial-gradient(ellipse at top right, rgba(255,122,24,0.15), transparent 60%),
    radial-gradient(ellipse at bottom left, rgba(255,154,69,0.08), transparent 50%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}
.hero-content { max-width: 780px; }
.hero-badge {
  display: inline-block;
  padding: 7px 14px;
  background: var(--accent-dim);
  border: 1px solid rgba(255,122,24,0.35);
  color: var(--accent);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}
.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
}
.hero h1 span { color: var(--accent); }
.hero-sub {
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--muted);
  margin-bottom: 36px;
  max-width: 620px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.hero-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.hero-feature strong {
  display: block;
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 4px;
}
.hero-feature span {
  color: var(--muted);
  font-size: 14px;
}

/* ═══════════ СЕКЦИИ — общий паддинг ═══════════ */
.services, .why, .how, .gallery, .order, .contacts {
  padding: 80px 0;
}
.why { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ═══════════ УСЛУГИ ═══════════ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.service-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform .15s, border-color .15s;
}
.service-card:hover {
  transform: translateY(-3px);
  border-color: rgba(255,122,24,0.5);
}
.service-icon {
  font-size: 32px;
  margin-bottom: 16px;
  display: inline-block;
}
.service-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  font-weight: 700;
}
.service-card p {
  color: var(--muted);
  font-size: 15px;
}

/* ═══════════ ПОЧЕМУ МЫ ═══════════ */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px 32px;
}
.why-item { display: flex; flex-direction: column; gap: 12px; }
.why-icon { font-size: 34px; }
.why-item h3 {
  font-size: 18px;
  font-weight: 700;
}
.why-item p {
  color: var(--muted);
  font-size: 15px;
}

/* ═══════════ КАК РАБОТАЕМ ═══════════ */
.how-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
}
.how-step {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
}
.how-num {
  font-size: 36px;
  font-weight: 900;
  color: var(--accent);
  opacity: 0.4;
  margin-bottom: 12px;
  line-height: 1;
}
.how-step h3 { font-size: 18px; margin-bottom: 8px; }
.how-step p { color: var(--muted); font-size: 15px; }

/* ═══════════ ГАЛЕРЕЯ ═══════════ */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.gallery-item {
  aspect-ratio: 4/3;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.gallery-item--empty {
  color: var(--muted);
  font-size: 14px;
  border-style: dashed;
}

/* ═══════════ CTA-BAND ═══════════ */
.cta-band {
  padding: 60px 0;
  background: linear-gradient(135deg, var(--accent), #E85C00);
  color: #0B0F1A;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2 {
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 800;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.cta-band p { opacity: 0.85; font-size: 16px; }
.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.cta-band .btn--primary {
  background: #0B0F1A;
  color: var(--accent);
}
.cta-band .btn--outline-light {
  border-color: rgba(11,15,26,0.5);
  color: #0B0F1A;
}
.cta-band .btn--outline-light:hover { background: rgba(0,0,0,0.12); }

/* ═══════════ ФОРМА ЗАЯВКИ ═══════════ */
.order-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.order-info h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.order-info p {
  color: var(--muted);
  margin-bottom: 24px;
  font-size: 16px;
}
.order-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.order-list li {
  padding-left: 28px;
  position: relative;
  color: var(--muted);
  font-size: 15px;
}
.order-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 800;
}

.order-form {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.form-field input,
.form-field textarea {
  padding: 13px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  font-size: 15px;
  transition: border-color .15s;
  resize: vertical;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-note {
  font-size: 12px;
  color: var(--muted);
  text-align: center;
}
.form-note a { color: var(--accent); text-decoration: underline; }

/* ═══════════ КОНТАКТЫ ═══════════ */
.contacts-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: start;
}
.contacts-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.contact-row {}
.contact-label {
  font-size: 13px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.contact-value {
  font-size: 17px;
  font-weight: 500;
  line-height: 1.5;
}
.contact-value a { color: var(--accent); }
.contact-value a:hover { text-decoration: underline; }
.contacts-map {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.contacts-map iframe { display: block; width: 100%; height: 400px; border: 0; }

/* ═══════════ FOOTER ═══════════ */
.site-footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 32px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}
.footer-brand .logo-mark { width: 34px; height: 34px; font-size: 13px; }
.footer-copy { color: var(--muted); font-size: 14px; }
.footer-links a {
  color: var(--muted);
  font-size: 14px;
  margin-left: 20px;
}
.footer-links a:hover { color: var(--accent); }

/* ═══════════ АДАПТИВ ═══════════ */
@media (max-width: 960px) {
  .nav { display: none; }
  .phone { display: none; }
  .burger { display: flex; }
  .header-actions .btn { padding: 10px 16px; font-size: 14px; }

  .nav.nav--open {
    display: flex;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-2);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px;
    gap: 16px;
    margin-left: 0;
  }

  .order-inner,
  .contacts-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .cta-inner { flex-direction: column; align-items: flex-start; }
  .hero { padding: 60px 0 50px; }
  .services, .why, .how, .gallery, .order, .contacts { padding: 60px 0; }
}

@media (max-width: 520px) {
  .hero-features { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links a { margin: 0 10px; }
  .order-form { padding: 22px; }
}

/* ═══════════ СЕКЦИЯ-ССЫЛКА НА КАНАЛ ═══════════ */
.channel-cta {
  padding: 60px 0;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.channel-cta__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.channel-cta__text { flex: 1 1 400px; }
.channel-cta__text h2 {
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}
.channel-cta__text p {
  color: var(--muted);
  font-size: 16px;
  max-width: 600px;
}
.channel-cta__action { flex: 0 0 auto; }

@media (max-width: 720px) {
  .channel-cta__inner { flex-direction: column; align-items: flex-start; }
  .channel-cta__action { width: 100%; }
  .channel-cta__action .btn { width: 100%; justify-content: center; }
}

/* ═══════════ ЛОГОТИП-КАРТИНКА ═══════════ */
.logo-img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  object-fit: cover;
  display: block;
  flex-shrink: 0;
}