/* ─── Утилиты ──────────────────────────────────── */

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

.btn {
  display: inline-block;
  padding: 14px 28px;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-family);
  font-size: var(--fs-body);
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: background 0.2s;
  text-align: center;
}

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

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

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

/* ─── Header ───────────────────────────────────── */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  height: 72px;
}

.header__logo {
  font-size: 20px;
  font-weight: 700;
}

.header__nav {
  display: flex;
  gap: 32px;
}

.header__nav a {
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-text);
  transition: color 0.2s;
}

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

.header__contacts {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}

.header__phone {
  font-size: 18px;
  font-weight: 700;
}

.header__email {
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
}

.header__links {
  display: flex;
  gap: 8px;
  align-items: center;
}

.header__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.header__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s;
}

/* ─── Hero ─────────────────────────────────────── */

.hero {
  padding: 80px 0 60px;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero__title {
  font-size: var(--fs-h1);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 24px;
}

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

.hero__features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.hero__feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-body);
  font-weight: 500;
}

.hero__feature img {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.hero__image img {
  width: 100%;
  border-radius: var(--radius);
}

/* ─── Преимущества ──────────────────────────────── */

.advantages {
  padding: var(--section-padding);
  background: var(--color-card-bg);
}

.advantages__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
}

.advantage-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  background: var(--color-bg);
  border-radius: var(--radius);
}

.advantage-card__icon {
  width: 48px;
  height: 48px;
}

.advantage-card__value {
  font-size: 36px;
  font-weight: 700;
}

.advantage-card__label {
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
  line-height: 1.4;
}

/* ─── Экспертный блок + Форма ──────────────────── */

.cta-form {
  padding: var(--section-padding);
}

.cta-form__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.cta-form__title {
  font-size: var(--fs-h2);
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-form__subtitle {
  font-size: var(--fs-body);
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.cta-form__expert {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-small);
  font-weight: 500;
}

.cta-form__expert img {
  width: 20px;
  height: 20px;
}

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

.form__input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  font-size: var(--fs-body);
  outline: none;
  transition: border-color 0.2s;
}

.form__input:focus {
  border-color: var(--color-accent);
}

.form__checkbox {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
  cursor: pointer;
}

.form__checkbox input {
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--color-accent);
}

.form__checkbox a {
  color: var(--color-text-secondary);
  text-decoration: underline;
}

/* ─── Каталог ───────────────────────────────────── */

.catalog {
  padding: var(--section-padding);
  background: var(--color-card-bg);
}

.catalog__header {
  margin-bottom: 32px;
}

.catalog__title {
  font-size: var(--fs-h2);
  font-weight: 700;
  margin-bottom: 8px;
}

.catalog__count {
  color: var(--color-text-secondary);
  font-size: var(--fs-small);
}

.catalog__tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.catalog__tab {
  padding: 8px 18px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: var(--fs-small);
  font-weight: 500;
  background: var(--color-bg);
  transition: all 0.2s;
}

.catalog__tab:hover,
.catalog__tab--active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.catalog__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap);
}

.product-card {
  background: var(--color-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.product-card__image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-card__badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--color-accent);
  color: #fff;
  font-size: var(--fs-xs);
  font-weight: 700;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}

.product-card__body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.product-card__size {
  font-size: var(--fs-small);
  color: var(--color-text-secondary);
}

.product-card__tag {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-accent);
}

.product-card__options {
  font-size: var(--fs-xs);
  color: var(--color-text-secondary);
}

.product-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border-top: 1px solid var(--color-border);
  gap: 8px;
}

.product-card__price {
  font-size: 18px;
  font-weight: 700;
}

.product-card__btn {
  padding: 10px 16px;
  font-size: var(--fs-small);
}

.catalog__more {
  margin-top: 40px;
  text-align: center;
}

/* ─── Footer ───────────────────────────────────── */

.footer {
  background: var(--color-bg-footer);
  color: #fff;
  padding: 48px 0;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
}

.footer__title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
}

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

.footer__phone {
  font-size: 20px;
  font-weight: 700;
}

.footer__email,
.footer__address {
  font-size: var(--fs-small);
  color: #aaa;
}

.footer__nav {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__nav a {
  font-size: var(--fs-small);
  color: #aaa;
  transition: color 0.2s;
}

.footer__nav a:hover {
  color: #fff;
}

.footer__social {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid #444;
  border-radius: 50%;
  transition: border-color 0.2s;
}

.footer__social a:hover {
  border-color: #fff;
}

.footer__social img {
  width: 18px;
  height: 18px;
  filter: brightness(0) invert(1);
}

.footer__copy {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid #333;
  font-size: var(--fs-xs);
  color: #666;
  display: flex;
  justify-content: space-between;
}

/* ─── Адаптив ───────────────────────────────────── */

@media (max-width: 1024px) {
  :root {
    --fs-h1: 36px;
    --fs-h2: 28px;
  }

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

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

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

@media (max-width: 768px) {
  :root {
    --fs-h1: 28px;
    --fs-h2: 22px;
    --section-padding: 48px 0;
  }

  .header__nav {
    display: none;
  }

  .header__burger {
    display: flex;
  }

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

  .hero__image {
    display: none;
  }

  .cta-form__inner {
    grid-template-columns: 1fr;
  }

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

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

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}