/* inteh.cxl.ru — technical building maintenance */

:root {
  --blue-900: #0d2b4e;
  --blue-700: #1a4a7a;
  --blue-500: #2563a8;
  --blue-400: #3b82c4;
  --blue-100: #e8f1fa;
  --gray-900: #1e2936;
  --gray-700: #475569;
  --gray-500: #64748b;
  --gray-300: #cbd5e1;
  --gray-100: #f1f5f9;
  --white: #ffffff;
  --shadow: 0 4px 24px rgba(13, 43, 78, 0.08);
  --shadow-lg: 0 12px 40px rgba(13, 43, 78, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --font: "Inter", system-ui, -apple-system, sans-serif;
  --transition: 0.25s ease;
  --header-top-h: 40px;
  --header-main-h: 72px;
  --header-h: calc(var(--header-top-h) + var(--header-main-h));
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--white);
}

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

a {
  color: var(--blue-500);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--blue-700);
}

.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-300);
}

.header__top {
  background: var(--blue-900);
  color: var(--gray-300);
  height: var(--header-top-h);
}

.header__top-inner {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: var(--header-top-h);
}

.header__contacts {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem 1.5rem;
}

.header__contact {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--gray-300);
  white-space: nowrap;
  transition: color var(--transition);
}

.header__contact:hover {
  color: var(--white);
}

.header__contact--hours {
  cursor: default;
}

.header__contact--hours:hover {
  color: var(--gray-300);
}

.header__contact svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.header__main {
  height: var(--header-main-h);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-main-h);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--blue-900);
  text-decoration: none;
}

.logo:hover {
  color: var(--blue-700);
}

.logo__mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo__mark svg {
  width: 22px;
  height: 22px;
  fill: var(--white);
}

.nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray-700);
}

.nav__link:hover {
  color: var(--blue-500);
}

.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.1rem;
  background: var(--blue-500);
  color: var(--white) !important;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.875rem;
}

.nav__cta:hover {
  background: var(--blue-700);
  color: var(--white) !important;
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.burger span {
  width: 24px;
  height: 2px;
  background: var(--blue-900);
  border-radius: 2px;
  transition: var(--transition);
}

/* Hero */
.hero {
  padding-top: calc(var(--header-h) + 3rem);
  padding-bottom: 4rem;
  background: linear-gradient(160deg, var(--blue-100) 0%, var(--white) 55%);
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero__badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  background: var(--white);
  border: 1px solid var(--blue-400);
  color: var(--blue-700);
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 1rem;
}

.hero__title {
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--blue-900);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.hero__title span {
  color: var(--blue-500);
}

.hero__text {
  font-size: 1.05rem;
  color: var(--gray-700);
  margin: 0 0 1.75rem;
  max-width: 32rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  font-family: inherit;
}

.btn--primary {
  background: var(--blue-500);
  color: var(--white);
}

.btn--primary:hover {
  background: var(--blue-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn--outline {
  background: var(--white);
  color: var(--blue-700);
  border: 2px solid var(--blue-400);
}

.btn--outline:hover {
  background: var(--blue-100);
}

.hero__image-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero__image-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(13, 43, 78, 0.25));
  pointer-events: none;
}

.hero__image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.hero__stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-300);
}

.hero__stat strong {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--blue-700);
}

.hero__stat span {
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* Sections */
.section {
  padding: 4.5rem 0;
}

.section--gray {
  background: var(--gray-100);
}

.section__label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--blue-500);
  margin-bottom: 0.5rem;
}

.section__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--blue-900);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}

.section__desc {
  color: var(--gray-700);
  max-width: 36rem;
  margin: 0 0 2.5rem;
}

/* Services */
.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 0;
  border: 1px solid var(--gray-300);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.service-card:hover {
  box-shadow: var(--shadow);
  border-color: var(--blue-400);
}

.service-card__icon {
  width: 52px;
  height: 52px;
  background: var(--blue-100);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 1.25rem 1.75rem 1rem;
}

.service-card__icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--blue-500);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.service-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--blue-900);
  margin: 0 1.75rem 0.5rem;
}

.service-card__text {
  font-size: 0.9rem;
  color: var(--gray-700);
  margin: 0 1.75rem 1.75rem;
}

.service-card__list {
  list-style: none;
  padding: 0;
  margin: 0 1.75rem 1.75rem;
}

.service-card__list li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.45rem;
  font-size: 0.875rem;
  color: var(--gray-700);
  line-height: 1.45;
}

.service-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 4px;
  height: 4px;
  background: var(--blue-500);
  border-radius: 50%;
}

.service-card__list li:last-child {
  margin-bottom: 0;
}

.service-card__img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
}

/* About */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.about__image img {
  width: 100%;
  aspect-ratio: 5 / 4;
  object-fit: cover;
}

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

.about__list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  font-size: 0.95rem;
  color: var(--gray-700);
}

.about__list img {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

/* Advantages */
.advantages__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.advantage {
  text-align: center;
  padding: 2rem 1.25rem;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.advantage__img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.advantage__num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--blue-500);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.advantage__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--blue-900);
  margin: 0 0 0.4rem;
}

.advantage__text {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin: 0;
}

/* Clients */
.clients__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.clients__item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 88px;
  padding: 1.25rem 1rem;
  background: var(--white);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.clients__item:hover {
  border-color: var(--blue-400);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.clients__logo {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gray-500);
  text-align: center;
  line-height: 1.3;
  transition: color var(--transition);
}

.clients__item:hover .clients__logo {
  color: var(--blue-700);
}

/* Contact */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 3rem;
  align-items: start;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.contact__item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact__item-icon {
  width: 44px;
  height: 44px;
  background: var(--blue-100);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact__item-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--blue-500);
  fill: none;
  stroke-width: 2;
}

.contact__item strong {
  display: block;
  font-size: 0.8rem;
  color: var(--gray-500);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.contact__item a,
.contact__item span {
  color: var(--blue-900);
  font-weight: 600;
}

.form-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--gray-300);
}

.form-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--blue-900);
  margin: 0 0 0.35rem;
}

.form-card__subtitle {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin: 0 0 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 0.35rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 0.95rem;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  background: var(--gray-100);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--blue-400);
  box-shadow: 0 0 0 3px rgba(37, 99, 168, 0.15);
  background: var(--white);
}

.form-group textarea {
  min-height: 110px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form__submit {
  width: 100%;
  margin-top: 0.5rem;
}

.form__privacy {
  font-size: 0.75rem;
  color: var(--gray-500);
  margin-top: 0.85rem;
  text-align: center;
}

/* Lead success */
.lead-success {
  display: none;
  padding: 1rem 1.25rem;
  background: #ecfdf5;
  border: 1px solid #6ee7b7;
  border-radius: 10px;
  color: #065f46;
  font-weight: 500;
  margin-bottom: 1.25rem;
  align-items: center;
  gap: 0.75rem;
}

.lead-success.is-visible {
  display: flex;
}

.lead-success svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  stroke: #059669;
  fill: none;
  stroke-width: 2;
}

/* Footer */
.footer {
  background: var(--blue-900);
  color: var(--gray-300);
  padding: 2.5rem 0 1.5rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer .logo {
  color: var(--white);
  margin-bottom: 0.75rem;
}

.footer__text {
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

.footer__heading {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--white);
  margin: 0 0 1rem;
}

.footer__links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__links li {
  margin-bottom: 0.5rem;
}

.footer__links a {
  color: var(--gray-300);
  font-size: 0.9rem;
}

.footer__links a:hover {
  color: var(--white);
}

.footer__bottom {
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.8rem;
}

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--gray-300);
  padding: 1rem 1.25rem 1.5rem;
  flex-direction: column;
  gap: 0.75rem;
  z-index: 99;
  box-shadow: var(--shadow);
}

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

.mobile-nav__contacts {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding-bottom: 0.85rem;
  margin-bottom: 0.35rem;
  border-bottom: 1px solid var(--gray-300);
}

.mobile-nav__contact {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--blue-700);
}

.mobile-nav__contact svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  stroke: var(--blue-500);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.mobile-nav .nav__link {
  padding: 0.5rem 0;
  font-size: 1rem;
}

/* Responsive */
@media (max-width: 992px) {
  .hero__grid,
  .about__grid,
  .contact__grid {
    grid-template-columns: 1fr;
  }

  .hero__image-wrap {
    order: -1;
  }

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

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

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

  .header__contact--hours {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --header-top-h: 36px;
  }

  .header__top-inner {
    justify-content: center;
  }

  .header__contacts {
    justify-content: center;
    gap: 0.35rem 1rem;
  }

  .header__contact span {
    font-size: 0.75rem;
  }

  .header__contact:nth-child(2) {
    display: none;
  }

  .nav {
    display: none;
  }

  .burger {
    display: flex;
  }

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

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero__stats {
    flex-wrap: wrap;
    gap: 1.25rem;
  }

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

@media (max-width: 480px) {
  .clients__grid {
    grid-template-columns: 1fr;
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }
}