:root {
  --orange: #ff7a1a;
  --orange-dark: #e2620a;
  --white: #ffffff;
  --bg: #f6f6f4;
  --panel: #ffffff;
  --dark: #1c1c1e;
  --text: #1c1c1e;
  --muted: #6b6b6b;
  --border: #e6e2dc;
  --radius: 14px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
}

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

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

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

/* ===== Кнопки ===== */
.btn {
  display: inline-block;
  padding: 13px 30px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 15px;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
  cursor: pointer;
}
.btn--accent { background: var(--orange); color: #ffffff; }
.btn--accent:hover { background: var(--orange-dark); transform: translateY(-2px); }
.btn--outline { border: 2px solid var(--orange); color: var(--orange-dark); }
.btn--outline:hover { background: rgba(255, 122, 26, .1); }
.btn--card {
  background: transparent;
  border: 1.5px solid var(--orange);
  color: var(--orange-dark);
  padding: 10px 22px;
  font-size: 14px;
}
.btn--card:hover { background: var(--orange); color: #ffffff; }
.btn--big { font-size: 18px; padding: 15px 34px; }

/* ===== Шапка ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 14px rgba(0, 0, 0, .04);
}
.header__inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 74px;
  position: relative;
  z-index: 50;
}
.header__logo img { height: 46px; width: auto; }
.nav { display: flex; gap: 26px; margin-left: auto; }
.nav a { color: var(--muted); font-size: 15px; font-weight: 600; transition: color .15s; }
.nav a:hover { color: var(--orange-dark); }
.header__contacts { display: flex; flex-direction: column; text-align: right; }
.header__phone { font-weight: 800; font-size: 17px; color: var(--text); }
.header__phone:hover { color: var(--orange-dark); }
.header__hours { font-size: 12.5px; color: var(--muted); }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.burger span { width: 24px; height: 2.5px; background: var(--text); border-radius: 2px; transition: .2s; }

/* ===== Главный экран ===== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 110px 0 120px;
  background: url(../img/3d-house.jpg) no-repeat top left fixed;
  background-size: cover;
  z-index: 10;
}
.hero__pattern {
  position: absolute;
  z-index:20;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, transparent 0 90px, #ff7a1a 90px 92px, transparent 92px 180px, #1c1c1e 180px 183px);
  pointer-events: none;
  opacity: 0.08;
}
.hero:after {content: "";width: 100%;height: 100%;position: absolute;z-index:10;top:0;left: 0;background: linear-gradient(122deg, #060606b0 0%, #669d6f6e 100%);}
.hero__inner {position: relative;z-index: 150;}
.hero__text { max-width: 720px; }
.hero__label {
  display: inline-block;
  color: var(--orange-dark);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: 13px;
  margin-bottom: 18px;
  border: 1px solid rgba(255, 122, 26, .5);
  background: rgb(255 255 255 / 86%);
  padding: 6px 14px;
  border-radius: 100px;
}
.hero h1 {
  font-size: clamp(32px, 5.4vw, 56px);
  line-height: 1.12;
  font-weight: 800;
  color: #fff;
  margin-bottom: 22px;
}
.hero h1 span { color: var(--orange); }
.hero__sub {color: #fff;font-size: 18px;max-width: 560px;margin-bottom: 36px;}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ===== Преимущества ===== */
.strip { padding: 72px 0; background: var(--white); border-top: 1px solid var(--border); }
.strip__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}
.strip__item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.strip__item:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 122, 26, .55);
  box-shadow: 0 12px 28px rgba(0, 0, 0, .07);
}
.strip__num {
  font-size: 30px;
  font-weight: 800;
  color: var(--orange);
  opacity: .95;
  margin-bottom: 10px;
}
.strip__item h3 { font-size: 17px; margin-bottom: 8px; }
.strip__item p { color: var(--muted); font-size: 14px; }

/* ===== Каталог ===== */
.catalog { padding: 84px 0; }
.section-title {
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 800;
  margin-bottom: 10px;
}
.section-title::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  background: var(--orange);
  border-radius: 2px;
  margin-top: 12px;
}
.section-sub { color: var(--muted); margin-bottom: 34px; }

.tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 30px; }
.tab {
  background: var(--white);
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 11px 22px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: .15s;
}
.tab:hover { color: var(--text); border-color: rgba(255, 122, 26, .5); }
.tab.active { background: var(--orange); color: #ffffff; border-color: var(--orange); }

.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.products {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 122, 26, .6);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .09);
}
.card__badge {
  align-self: flex-start;
  background: rgba(255, 122, 26, .12);
  color: var(--orange-dark);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 11px;
  border-radius: 100px;
  margin-bottom: 14px;
  letter-spacing: .03em;
}
.card__badge--dark { background: rgba(28, 28, 30, .07); color: #555; }
.card h3 { font-size: 16px; line-height: 1.35; margin-bottom: 8px; }
.mark { color: var(--orange-dark); white-space: nowrap; }
.card__desc { color: var(--muted); font-size: 13.5px; flex-grow: 1; margin-bottom: 16px; }
.card__price { font-size: 26px; font-weight: 800; margin-bottom: 16px; }
.card__price span { font-size: 14px; font-weight: 500; color: var(--muted); }

.catalog__note {
  margin-top: 34px;
  background: rgba(255, 122, 26, .08);
  border: 1px dashed rgba(226, 98, 10, .55);
  border-radius: var(--radius);
  padding: 20px 26px;
  font-size: 15px;
}
.catalog__note a { color: var(--orange-dark); font-weight: 700; }

/* ===== Доставка ===== */
.delivery {
  padding: 84px 0;
  background: linear-gradient(120deg, #20201f, #141414);
  color: #f4f4f4;
}
.delivery__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px;
  align-items: center;
}
.delivery__list { list-style: none; margin-top: 24px; }
.delivery__list li {
  padding: 14px 0 14px 34px;
  position: relative;
  color: #cfcfcf;
  border-bottom: 1px solid rgba(255, 255, 255, .09);
}
.delivery__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 21px;
  width: 12px;
  height: 12px;
  background: var(--orange);
  transform: rotate(45deg);
  border-radius: 2px;
}
.delivery__list strong { color: #ffffff; }
.delivery__cta {
  background: #232325;
  border: 1px solid rgba(255, 122, 26, .4);
  border-radius: var(--radius);
  padding: 38px 32px;
  text-align: center;
}
.delivery__cta p { font-size: 18px; font-weight: 700; margin-bottom: 22px; }
.delivery__cta .btn--accent { color: #161616; }
.delivery__mail {
  display: block;
  margin-top: 16px;
  color: #a3a3a3;
  font-size: 15px;
}
.delivery__mail:hover { color: var(--orange); }

/* ===== Контакты ===== */
.contacts { padding: 84px 0; background: var(--white); border-top: 1px solid var(--border); }
.contacts__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 34px;
}
.contacts__card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.contacts__label {
  display: block;
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 10px;
}
.contacts__card a, .contacts__card p { font-size: 17px; font-weight: 700; }
.contacts__card a:hover { color: var(--orange-dark); }
.contacts__card p { line-height: 1.5; }

/* ===== Подвал ===== */
.footer {
  background: #ffffff;
  color: #5a5a5a;
  padding: 30px 0;
  border-top: 1px solid #ccc;
}
.footer__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}
.footer__logo {
  height: 55px;
  padding: 2px;
}
.footer__copy { color: #a3a3a3; font-size: 13.5px; flex: 1; min-width: 240px; }
.footer__phone { font-weight: 800; font-size: 17px; }
.footer__phone:hover { color: var(--orange); }

/* ===== Адаптив ===== */
@media (max-width: 1024px) {
  .strip__grid { grid-template-columns: repeat(2, 1fr); }
  .products { grid-template-columns: repeat(3, 1fr); }
  .contacts__grid { grid-template-columns: repeat(2, 1fr); }
  .delivery__inner { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 720px) {
  .products { grid-template-columns: repeat(2, 1fr); }
  .header__contacts { display: none; }
  .nav {
    display: none;
    position: absolute;
    top: 74px;
    left: 0; right: 0;
    flex-direction: column;
    background: var(--white);
    padding: 18px 24px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(0,0,0,.08);
  }
  .nav.open { display: flex; }
  .burger { display: flex; margin-left: auto; }
  .hero { padding: 70px 0 80px; }
}
@media (max-width: 480px) {
  .products { grid-template-columns: 1fr; }
  .strip__grid, .contacts__grid { grid-template-columns: 1fr; }
}