/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --accent: #E8A020;
  --accent-dark: #c4851a;
  --dark: #0f1929;
  --dark2: #1a2234;
  --mid: #243450;
  --text: #2c3e50;
  --text-light: #5a6a7e;
  --bg: #f7f8fa;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.13);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  font-size: 16px;
}

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

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

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === BUTTONS === */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.1s;
  border: 2px solid transparent;
}
.btn:active { transform: scale(0.98); }
.btn--primary {
  background: var(--accent);
  color: var(--dark);
  border-color: var(--accent);
}
.btn--primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn--outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.5);
}
.btn--outline:hover { border-color: var(--white); background: rgba(255,255,255,0.08); }
.btn--full { width: 100%; text-align: center; }

/* === HEADER === */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--dark2);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header__inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo__text { display: flex; flex-direction: column; line-height: 1.2; }
.logo__name { font-weight: 700; font-size: 16px; color: var(--white); }
.logo__sub { font-size: 11px; color: var(--accent); letter-spacing: 0.05em; text-transform: uppercase; }

.nav { display: flex; gap: 24px; margin-left: auto; }
.nav a {
  color: rgba(255,255,255,0.75);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav a:hover { color: var(--accent); }

.header__phone {
  color: var(--accent);
  font-weight: 700;
  font-size: 15px;
  white-space: nowrap;
  flex-shrink: 0;
}
.header__phone:hover { color: var(--accent-dark); }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}
.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: 0.3s;
}

/* === HERO === */
.hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark2) 60%, #1c2d4a 100%);
  padding: 80px 0 60px;
  overflow: hidden;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.hero__label {
  display: inline-block;
  background: rgba(232,160,32,0.12);
  color: var(--accent);
  border: 1px solid rgba(232,160,32,0.3);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}
.hero__title {
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 800;
  color: var(--white);
  line-height: 1.18;
  margin-bottom: 20px;
}
.hero__desc {
  color: rgba(255,255,255,0.7);
  font-size: 17px;
  margin-bottom: 36px;
  max-width: 480px;
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero__visual { display: flex; flex-direction: column; gap: 20px; }
.hero__card {
  display: flex;
  gap: 12px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 20px 24px;
}
.hero__stat { text-align: center; flex: 1; }
.hero__num {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}
.hero__hint { font-size: 12px; color: rgba(255,255,255,0.55); }
.hero__img-wrap { border-radius: var(--radius); overflow: hidden; }
.hero__svg { width: 100%; height: auto; }

/* === SECTIONS === */
.section { padding: 80px 0; }
.section-head { text-align: center; margin-bottom: 52px; }
.section-title { font-size: clamp(24px, 3vw, 36px); font-weight: 800; color: var(--dark); margin-bottom: 12px; }
.section-sub { font-size: 17px; color: var(--text-light); max-width: 560px; margin: 0 auto; }

/* === SERVICES === */
.services { background: var(--bg); }
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.service-card__icon { margin-bottom: 18px; }
.service-card h3 { font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.service-card p { font-size: 14px; color: var(--text-light); line-height: 1.65; }

/* === ABOUT === */
.about { background: var(--white); }
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.about__text .section-title { text-align: left; margin-bottom: 20px; }
.about__text p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 16px;
  line-height: 1.7;
}
.about__list { list-style: none; margin-top: 24px; display: flex; flex-direction: column; gap: 12px; }
.about__list li { display: flex; align-items: flex-start; gap: 12px; font-size: 15px; color: var(--text); }
.about__check { color: var(--accent); font-weight: 700; flex-shrink: 0; margin-top: 1px; }

.about__numbers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding-top: 54px;
}
.about__num-card {
  background: var(--dark2);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.about__num-card span { color: rgba(255,255,255,0.65); font-size: 14px; }
.about__big { font-size: 40px; font-weight: 800; color: var(--accent); line-height: 1; }

/* === MATERIALS === */
.materials { background: var(--bg); }
.materials__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.mat-item {
  background: var(--white);
  border-radius: var(--radius);
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}
.mat-item:hover { transform: translateY(-3px); }
.mat-item__emoji { font-size: 30px; }
.mat-item--cta {
  background: linear-gradient(135deg, var(--dark2), var(--mid));
  color: var(--accent);
}

/* === WHY US === */
.whyus { background: var(--dark2); }
.whyus .section-title { color: var(--white); }
.whyus__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.why-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 28px 22px;
  transition: background 0.2s;
}
.why-card:hover { background: rgba(255,255,255,0.08); }
.why-card__icon { font-size: 32px; margin-bottom: 14px; }
.why-card h4 { font-size: 16px; font-weight: 700; color: var(--white); margin-bottom: 10px; }
.why-card p { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 1.65; }

/* === CONTACT === */
.contact { background: var(--white); }
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.contact__desc { color: var(--text-light); margin-bottom: 36px; font-size: 16px; line-height: 1.7; }
.contact__details { display: flex; flex-direction: column; gap: 20px; }
.contact__row { display: flex; align-items: flex-start; gap: 14px; }
.contact__ico { font-size: 22px; flex-shrink: 0; margin-top: 2px; }
.contact__row div { display: flex; flex-direction: column; gap: 3px; }
.contact__row strong { font-size: 13px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-light); }
.contact__row a, .contact__row span { font-size: 16px; font-weight: 600; color: var(--dark); }
.contact__row a:hover { color: var(--accent); }

.contact__form-wrap {
  background: var(--bg);
  border-radius: 16px;
  padding: 36px;
}
.contact__form-wrap h3 { font-size: 22px; font-weight: 700; color: var(--dark); margin-bottom: 24px; }

.form-success {
  background: #e6f9ef;
  border: 1px solid #7ac99a;
  color: #1b7a3a;
  padding: 14px 18px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-weight: 500;
}

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid #dde3ea;
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
  color: var(--dark);
  background: var(--white);
  transition: border-color 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; }
.form-note { font-size: 12px; color: var(--text-light); text-align: center; margin-top: 12px; }

/* === FOOTER === */
.footer {
  background: var(--dark);
  padding: 36px 0;
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer__brand { display: flex; flex-direction: column; gap: 4px; }
.footer__logo { font-size: 18px; font-weight: 700; color: var(--white); }
.footer__inn { font-size: 12px; color: rgba(255,255,255,0.4); }
.footer__contacts { display: flex; flex-direction: column; gap: 4px; text-align: center; }
.footer__contacts a, .footer__contacts span {
  color: rgba(255,255,255,0.65);
  font-size: 14px;
}
.footer__contacts a:hover { color: var(--accent); }
.footer__copy { font-size: 12px; color: rgba(255,255,255,0.35); text-align: right; }

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .materials__grid { grid-template-columns: repeat(3, 1fr); }
  .whyus__grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .header__inner { gap: 16px; }
  .nav { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: var(--dark2); padding: 20px 24px; gap: 16px; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .nav.open { display: flex; }
  .header__phone { font-size: 13px; }
  .burger { display: flex; }

  .hero { padding: 50px 0 40px; }
  .hero__inner { grid-template-columns: 1fr; gap: 36px; }
  .hero__visual { order: -1; }
  .hero__card { justify-content: space-around; }

  .about__inner { grid-template-columns: 1fr; gap: 36px; }
  .about__numbers { padding-top: 0; }

  .contact__inner { grid-template-columns: 1fr; gap: 36px; }
  .contact__form-wrap { padding: 24px; }

  .services__grid { grid-template-columns: 1fr; }
  .materials__grid { grid-template-columns: repeat(2, 1fr); }
  .whyus__grid { grid-template-columns: 1fr 1fr; }

  .footer__inner { flex-direction: column; text-align: center; }
  .footer__copy { text-align: center; }
  .footer__contacts { text-align: center; }
}

@media (max-width: 480px) {
  .materials__grid { grid-template-columns: 1fr 1fr; }
  .whyus__grid { grid-template-columns: 1fr; }
  .about__numbers { grid-template-columns: 1fr 1fr; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { text-align: center; }
}