/* ===== Якорь: сине-белая палитра, морская лаконичность, без градиентов ===== */
:root {
  --color-bg: #f2f6fc;
  --color-bg-card: #ffffff;
  --color-bg-section: #e4ecf7;
  --color-text: #0f1f3d;
  --color-text-muted: #4a5d7a;
  --color-accent: #1e5a9e;
  --color-accent-hover: #164a85;
  --color-border: #b8cce0;
  --font: 'Manrope', -apple-system, BlinkMacSystemFont, sans-serif;
  --container: min(1140px, 100% - 2rem);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
}

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

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

.container {
  width: var(--container);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

/* ===== Шапка ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(242, 246, 252, 0.95);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 60px;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
}

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

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  color: var(--color-text-muted);
  font-weight: 500;
}

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

.header__phone {
  font-weight: 600;
  color: var(--color-text);
}

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

.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
}

/* ===== Hero ===== */
.hero {
  padding: 4rem 0;
  text-align: center;
}

.hero__inner {
  max-width: 640px;
  margin: 0 auto;
}

.hero__title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
}

.hero__slogan {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  color: var(--color-accent);
  font-weight: 600;
}

.hero__region {
  margin: 0 0 2rem;
  color: var(--color-text-muted);
  font-size: 1rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.hero__trust {
  margin: 1.5rem 0 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ===== О нас ===== */
.about {
  padding: 3rem 0;
  background: var(--color-bg-section);
}

.about__text {
  max-width: 640px;
  margin: 0 auto;
}

.about__text p {
  margin: 0 0 1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.about__text p:last-child {
  margin-bottom: 0;
}

/* ===== Как мы работаем ===== */
.steps {
  padding: 3rem 0;
}

.steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 560px;
  margin: 0 auto;
}

.steps__item {
  position: relative;
  padding-left: 3rem;
  margin-bottom: 1.25rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.steps__item:last-child {
  margin-bottom: 0;
}

.steps__num {
  position: absolute;
  left: 0;
  top: 0;
  width: 1.75rem;
  height: 1.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 50%;
}

/* ===== Кнопки ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn_primary {
  background: var(--color-accent);
  color: #fff;
}

.btn_primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
}

.btn_secondary {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn_secondary:hover {
  background: var(--color-accent);
  color: #fff;
}

/* ===== Услуги ===== */
.section-title {
  margin: 0 0 2rem;
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
}

.services {
  padding: 3rem 0;
  background: var(--color-bg-section);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  padding: 1.5rem;
  background: var(--color-bg-card);
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.card__title {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
}

.card__text {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ===== Спецпредложения ===== */
.promo {
  padding: 3rem 0;
  background: var(--color-bg-section);
}

.promo__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card_promo .card__title {
  color: var(--color-accent);
}

/* ===== Почему мы ===== */
.why {
  padding: 3rem 0;
}

.why__list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 560px;
  margin: 0 auto;
}

.why__item {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.why__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* ===== Почему металлокаркас ===== */
.why-metal {
  padding: 3rem 0;
  background: var(--color-bg-section);
}

.why-metal__intro {
  text-align: center;
  color: var(--color-text-muted);
  margin: 0 0 1.5rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.why-metal__list {
  list-style: none;
  margin: 0;
  padding: 0;
  max-width: 560px;
  margin: 0 auto;
}

.why-metal__item {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.why-metal__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.why-metal__item strong {
  color: var(--color-text);
}

/* ===== Где работаем ===== */
.geo {
  padding: 3rem 0;
}

.geo__content {
  max-width: 560px;
  margin: 0 auto;
}

.geo__content p {
  margin: 0 0 1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.geo__content p:last-child {
  margin-bottom: 0;
}

/* ===== Что ещё делаем ===== */
.more {
  padding: 3rem 0;
  background: var(--color-bg-section);
}

.more__intro {
  text-align: center;
  color: var(--color-text-muted);
  margin: 0 0 1rem;
}

.more__list {
  list-style: none;
  margin: 0 auto 1.5rem;
  padding: 0;
  max-width: 400px;
}

.more__list li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.more__list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.more__cta {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin: 0;
}

/* ===== Гарантии ===== */
.guarantee {
  padding: 3rem 0;
}

.guarantee__content {
  max-width: 560px;
  margin: 0 auto;
}

.guarantee__content p {
  margin: 0 0 1rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.guarantee__content p:last-child {
  margin-bottom: 0;
}

/* ===== Портфолио ===== */
.portfolio {
  padding: 3rem 0;
  background: var(--color-bg-section);
}

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.portfolio__item {
  display: block;
  color: inherit;
  text-decoration: none;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
}

.portfolio__item:hover {
  border-color: var(--color-accent);
}

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

.portfolio__img_placeholder {
  background: var(--color-bg);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.portfolio__caption {
  display: block;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ===== Лайтбокс ===== */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.92);
  align-items: center;
  justify-content: center;
}

.lightbox_open {
  display: flex;
}

.lightbox__img {
  max-width: calc(100vw - 8rem);
  max-height: calc(100vh - 4rem);
  object-fit: contain;
  border-radius: 4px;
  user-select: none;
}

.lightbox__close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  opacity: 0.8;
}

.lightbox__close:hover {
  opacity: 1;
}

.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #fff;
  font-size: 3rem;
  line-height: 1;
  cursor: pointer;
  padding: 0 1rem;
  opacity: 0.7;
  user-select: none;
}

.lightbox__prev { left: 0; }
.lightbox__next { right: 0; }

.lightbox__prev:hover,
.lightbox__next:hover {
  opacity: 1;
}

.lightbox__counter {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

.portfolio__item {
  cursor: pointer;
}

/* ===== Заявка ===== */
.request {
  padding: 3rem 0;
  background: var(--color-bg-section);
}

.request__intro {
  text-align: center;
  color: var(--color-text-muted);
  margin: 0 0 1.5rem;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.request-form {
  max-width: 360px;
  margin: 0 auto 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.request-form__row {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.request-form__row_goal .request-form__name {
  margin-bottom: 0;
}

.request-form__radios {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.request-form__radio {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9375rem;
  color: var(--color-text);
  cursor: pointer;
}

.request-form__radio input {
  accent-color: var(--color-accent);
}

.request-form__label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.request-form__name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.request-form__input {
  padding: 0.75rem 1rem;
  font-family: var(--font);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.request-form__input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.8;
}

.request-form__input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.request-form__submit {
  margin-top: 0.25rem;
}

.request__consent {
  text-align: center;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin: 0.75rem 0 0;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}

.request__consent a {
  color: var(--color-accent);
}

.request__hint {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 0.25rem 0 0;
}

/* ===== FAQ ===== */
.faq {
  padding: 3rem 0;
  background: var(--color-bg-section);
}

.faq__list {
  max-width: 560px;
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq__question {
  padding: 1rem 0;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__question::after {
  content: '+';
  font-size: 1.25rem;
  color: var(--color-accent);
  flex-shrink: 0;
}

.faq__item[open] .faq__question::after {
  content: '−';
}

.faq__answer {
  margin: 0 0 1rem;
  padding: 0 0 0.5rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.faq__cta {
  text-align: center;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
}

.faq__cta-text {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--color-text-muted);
}

/* ===== Контакты ===== */
.contacts {
  padding: 3rem 0;
}

.contacts__block {
  text-align: center;
  margin-bottom: 1.5rem;
}

.contacts__link {
  display: inline-block;
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0.25rem 0;
}

.contacts__link_phone {
  font-size: 1.25rem;
}

.contacts__region {
  margin: 0.5rem 0 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.contacts__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ===== Футер ===== */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.footer__copy {
  margin: 0 0 0.5rem;
}

.footer__contacts {
  margin: 0;
}

.footer__contacts a {
  color: var(--color-text-muted);
}

.footer__contacts a:hover {
  color: var(--color-accent);
}

/* ===== Внутренние страницы (политика и т.п.) ===== */
main.container h1,
.content-page h1 {
  color: var(--color-text);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

main.container h2,
.content-page h2 {
  color: var(--color-text);
  font-size: 1.125rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem;
}

main.container p,
.content-page p {
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0 0 1rem;
}

main.container a,
.content-page a {
  color: var(--color-accent);
}

main.container a:hover,
.content-page a:hover {
  color: var(--color-accent-hover);
}

.content-page__back {
  margin-top: 2rem !important;
}

/* ===== Плавающие кнопки в углу ===== */
.float-actions {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.float-actions__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1rem;
  font-family: var(--font);
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  color: #fff;
  background: var(--color-accent);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
  transition: background 0.2s, transform 0.15s;
  white-space: nowrap;
}

.float-actions__btn:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: scale(1.03);
}

.float-actions__btn_phone {
  background: var(--color-accent);
}

.float-actions__btn_request {
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 2px solid var(--color-accent);
}

.float-actions__btn_request:hover {
  background: var(--color-accent);
  color: #fff;
}

.float-actions__btn_top {
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.5rem);
  transition: opacity 0.2s, transform 0.2s;
}

.float-actions__btn_top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* ===== Адаптив: мобильное меню ===== */
@media (max-width: 768px) {
  .nav,
  .header__phone {
    display: none;
  }

  .burger {
    display: flex;
  }

  .nav_open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 1rem;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
  }

  .header__phone.header__phone_visible {
    display: block;
    margin-top: 0.5rem;
  }

  .hero {
    padding: 3rem 0;
  }

  .hero__actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }

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

  .request-form__radios {
    flex-direction: column;
  }

  .float-actions {
    bottom: 1rem;
    right: 1rem;
  }

  .float-actions__btn {
    padding: 0.65rem 1rem;
    font-size: 0.75rem;
  }
}