/* ===================================================================
   SBHome — корпоративный стиль (чёрный / оранжевый / светло-серый)
   Чередование тёмных и светлых секций + оранжевые акцентные полосы
   =================================================================== */

/* ---------- Палитра ---------- */
:root {
  --orange:   #FF822E;
  --orange-d: #ED6E15;
  --orange-l: rgba(255, 130, 46, .14);

  --black:  #0f1a2e;
  --black2: #15273f;
  --black3: #1b2f49;

  --light: #EFEFEF;
  --white: #FFFFFF;
  --greige:#E5E3DF;

  --radius:   16px;
  --radius-s: 10px;

  --font: 'Manrope', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;

  /* Базовая (СВЕТЛАЯ) тема секций — переопределяется в .section--dark / .section--orange */
  --bg:        #EFEFEF;
  --surface:   #FFFFFF;
  --input-bg:  #f2f2f2;
  --text:      #141414;
  --muted:     #5c5c5c;
  --border:    rgba(0, 0, 0, .10);
  --placeholder:#8a8a8a;
  --shadow:    0 12px 30px -16px rgba(0, 0, 0, .25);
  --accent:    var(--orange);
}

/* ---------- Сброс ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h, 72px) + 12px); }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--black);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; }
.icon { width: 18px; height: 18px; fill: currentColor; flex-shrink: 0; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

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

/* ---------- Кнопки ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 26px; border: 0; border-radius: 4px;     /* рубленые углы = корпоративно */
  font-weight: 800; font-size: 15px; line-height: 1; letter-spacing: .2px;
  transition: transform .15s ease, background .2s ease, color .2s ease, box-shadow .2s ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--orange); color: #1a0d00;
  box-shadow: 0 10px 24px -10px rgba(255, 130, 46, .7);
}
.btn--primary:hover { background: var(--orange-d); transform: translateY(-2px); }
.btn--ghost {
  background: transparent; color: var(--text);
  box-shadow: inset 0 0 0 1.8px var(--border);
}
.btn--ghost:hover { box-shadow: inset 0 0 0 1.8px var(--orange); color: var(--orange); }
.btn--phone {
  background: var(--orange); color: #1a0d00;
  padding: 10px 16px; font-size: 14px; border-radius: 4px;
}
.btn--phone:hover { background: var(--orange-d); }

/* ---------- Шапка ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h, 72px);
  background: rgba(15, 26, 46, .85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 16px; }

.logo { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: .2px; color: #fff; }
.logo__mark {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: 8px;
  background: var(--orange); color: #1a0d00; font-size: 13px; font-weight: 800; letter-spacing: .3px;
}
.logo__text { color: #fff; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav__link {
  padding: 9px 13px; border-radius: 6px; color: #c9c9c9;
  font-weight: 600; font-size: 15px; transition: color .2s, background .2s;
}
.nav__link:hover { color: #fff; background: rgba(255, 255, 255, .06); }
.nav__link.is-active { color: var(--orange); }
.nav__call { margin-left: 8px; }

.burger { display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px; align-items: center; justify-content: center; background: transparent; border: 0; }
.burger span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: transform .25s, opacity .25s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===================================================================
   СЕКЦИИ — темы и чередование
   =================================================================== */
.section { padding: 92px 0; background: var(--bg); color: var(--text); }
.section--dark {
  --bg: var(--black); --surface: var(--black3); --input-bg: var(--black2);
  --text: #fff; --muted: #b3b3b3; --border: rgba(255, 255, 255, .12);
  --placeholder: #707070; --shadow: 0 18px 40px -22px rgba(0, 0, 0, .8);
}
.section--orange {
  --bg: var(--orange); --surface: rgba(0, 0, 0, .07); --input-bg: rgba(0, 0, 0, .08);
  --text: #2a1500; --muted: #4a2a00; --border: rgba(0, 0, 0, .18);
  --placeholder: #5a3410; --accent: #2a1500; --shadow: 0 18px 40px -22px rgba(0, 0, 0, .35);
}

.section__head { max-width: 760px; margin: 0 auto 52px; text-align: center; }
.section__eyebrow {
  display: inline-block; color: var(--orange); font-weight: 800; font-size: 13px;
  letter-spacing: 2px; text-transform: uppercase; margin-bottom: 12px;
}
.section--orange .section__eyebrow { color: #2a1500; }
.section__title { font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; margin: 0 0 14px; letter-spacing: -.5px; line-height: 1.12; }
.section__lead { color: var(--muted); font-size: 17px; margin: 0; }

/* ---------- HERO (чёрный) ---------- */
.hero { position: relative; background: var(--black); color: #fff; padding: calc(var(--header-h, 72px) + 70px) 0 90px; overflow: hidden; }
.hero__bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(820px 460px at 82% 0%, rgba(255, 130, 46, .28), transparent 60%),
    radial-gradient(600px 420px at 5% 30%, rgba(255, 130, 46, .10), transparent 60%);
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(720px 520px at 78% 22%, #000, transparent 72%);
  -webkit-mask-image: radial-gradient(720px 520px at 78% 22%, #000, transparent 72%);
}
.hero__inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }

.badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 8px 15px; border-radius: 999px;
  background: rgba(255, 130, 46, .14); border: 1px solid rgba(255, 130, 46, .4);
  color: var(--orange); font-weight: 700; font-size: 13px;
}
.badge__dot { width: 8px; height: 8px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 10px var(--orange); }

.hero__title { font-size: clamp(32px, 4.8vw, 56px); line-height: 1.06; font-weight: 800; margin: 24px 0 20px; letter-spacing: -.6px; }
.hero__subtitle { font-size: clamp(16px, 1.6vw, 19px); color: #c4c4c4; max-width: 580px; margin: 0 0 32px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.hero__actions .btn--ghost { color: #fff; box-shadow: inset 0 0 0 1.8px rgba(255,255,255,.28); }
.hero__actions .btn--ghost:hover { color: var(--orange); box-shadow: inset 0 0 0 1.8px var(--orange); }

.hero__stats { display: flex; gap: 38px; flex-wrap: wrap; }
.hero__stats li { display: flex; flex-direction: column; }
.hero__stats strong { font-size: 30px; font-weight: 800; color: #fff; line-height: 1; }
.hero__stats span { font-size: 13px; color: #9a9a9a; margin-top: 6px; }

.hero__visual { position: relative; height: 400px; }
.hero__glow {
  position: absolute; inset: 8% 18%; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 130, 46, .32), transparent 65%);
  filter: blur(22px);
}
.hero__card {
  position: absolute; display: flex; align-items: center; gap: 12px;
  padding: 16px 20px; border-radius: 14px;
  background: var(--black3); border: 1px solid rgba(255, 255, 255, .1);
  box-shadow: 0 18px 40px -22px rgba(0, 0, 0, .9);
  font-weight: 700; color: #fff; backdrop-filter: blur(4px);
  animation: float 6s ease-in-out infinite;
}
.hero__icon { width: 34px; height: 34px; fill: var(--orange); flex-shrink: 0; }
.hero__card--camera { top: 6%; left: 2%; }
.hero__card--lock { top: 40%; right: 0; animation-delay: -2s; }
.hero__card--bolt { bottom: 4%; left: 16%; animation-delay: -4s; }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }

/* ---------- Карточки услуг (на светлой секции) ---------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 1100px) { .cards { grid-template-columns: repeat(2, 1fr); } }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 28px; box-shadow: var(--shadow);
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card:hover { transform: translateY(-6px); border-color: var(--orange); box-shadow: 0 22px 44px -22px rgba(0,0,0,.35); }
.card__icon {
  width: 58px; height: 58px; border-radius: 14px; display: grid; place-items: center;
  background: var(--orange-l); border: 1px solid rgba(255,130,46,.35); margin-bottom: 20px;
}
.card__icon svg { width: 30px; height: 30px; fill: var(--orange); }
.card__title { font-size: 21px; font-weight: 800; margin: 0 0 10px; }
.card__text { color: var(--muted); margin: 0 0 18px; }
.card__list { display: grid; gap: 9px; margin-bottom: 22px; }
.card__list li { position: relative; padding-left: 28px; color: var(--text); font-size: 15px; opacity: .85; }
.card__list li::before {
  content: ""; position: absolute; left: 2px; top: 6px; width: 14px; height: 8px;
  border-left: 2.5px solid var(--orange); border-bottom: 2.5px solid var(--orange);
  transform: rotate(-45deg);
}
.card__link { color: var(--orange); font-weight: 800; }
.card__link:hover { color: var(--orange-d); }

/* ---------- Преимущества (на тёмной секции) ---------- */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 26px; transition: border-color .2s, transform .2s;
}
.feature:hover { border-color: var(--orange); transform: translateY(-4px); }
.feature__icon { width: 50px; height: 50px; border-radius: 12px; display: grid; place-items: center; background: var(--orange-l); margin-bottom: 16px; }
.feature__icon svg { width: 26px; height: 26px; fill: var(--orange); }
.feature__title { font-size: 18px; font-weight: 800; margin: 0 0 8px; }
.feature__text { color: var(--muted); margin: 0; font-size: 15px; }

/* ---------- Этапы (на светлой секции) ---------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.step {
  position: relative; padding: 28px 26px; border-radius: var(--radius);
  background: var(--surface); border: 1px solid var(--border); box-shadow: var(--shadow);
}
.step__num {
  display: inline-grid; place-items: center; width: 48px; height: 48px; border-radius: 12px;
  background: var(--orange); color: #1a0d00; font-weight: 800; font-size: 16px; margin-bottom: 16px;
}
.step__title { font-size: 18px; font-weight: 800; margin: 0 0 8px; }
.step__text { color: var(--muted); margin: 0; font-size: 15px; }

/* ===================================================================
   ЦЕНЫ + КАЛЬКУЛЯТОР (на тёмной секции)
   =================================================================== */
.price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
.price-list {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px;
}
.price-list__title { font-size: 20px; font-weight: 800; margin: 0 0 20px; }
.price-items { display: grid; gap: 4px; }
.price-items li {
  display: flex; justify-content: space-between; gap: 16px; align-items: baseline;
  padding: 14px 0; border-bottom: 1px dashed var(--border);
}
.price-items li:last-child { border-bottom: 0; }
.price-items__name { color: var(--text); opacity: .9; }
.price-items__val { font-weight: 800; color: var(--orange); white-space: nowrap; }
.price-items__note { color: var(--muted) !important; font-size: 13px; padding-top: 10px; opacity: 1 !important; }

/* калькулятор */
.calc {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px;
  box-shadow: var(--shadow); display: grid; gap: 4px;
}
.calc__title { font-size: 20px; font-weight: 800; margin: 0 0 6px; }
.calc__hint { color: var(--muted); margin: 0 0 22px; font-size: 14px; }
.calc__field { margin-bottom: 20px; }
.calc__label { display: block; font-weight: 700; margin-bottom: 10px; color: var(--text); }

.seg { display: inline-flex; background: var(--input-bg); border: 1px solid var(--border); border-radius: 8px; padding: 4px; }
.seg__btn {
  border: 0; background: transparent; color: var(--muted); font-weight: 700;
  padding: 10px 20px; border-radius: 6px; transition: background .2s, color .2s;
}
.seg__btn.is-active { background: var(--orange); color: #1a0d00; }

.checks { display: flex; flex-wrap: wrap; gap: 12px; }
.check {
  display: inline-flex; align-items: center; gap: 10px; cursor: pointer;
  padding: 11px 16px; border-radius: 10px; background: var(--input-bg);
  border: 1px solid var(--border); font-weight: 600; color: var(--text); transition: border-color .2s, background .2s;
}
.check:hover { border-color: var(--orange); }
.check input { width: 18px; height: 18px; accent-color: var(--orange); }
.check:has(input:checked) { border-color: var(--orange); background: var(--orange-l); }

.range { width: 100%; accent-color: var(--orange); }
.select {
  width: 100%; padding: 12px 14px; border-radius: 8px; background: var(--input-bg);
  border: 1px solid var(--border); color: var(--text); font-family: inherit; font-size: 15px;
}
.select:focus { outline: 2px solid var(--orange); outline-offset: 1px; }

.calc__result {
  display: flex; align-items: baseline; justify-content: space-between; gap: 14px;
  margin: 6px 0 18px; padding: 18px 20px; border-radius: 12px;
  background: var(--orange-l); border: 1px solid rgba(255,130,46,.4);
}
.calc__result-label { color: var(--muted); font-weight: 600; }
.calc__result-val { font-size: 28px; font-weight: 800; color: var(--orange); }
.section--dark .calc__result-val { color: var(--orange); }
.calc__cta { width: 100%; }

/* ===================================================================
   ОРАНЖЕВАЯ CTA-ПОЛОСА
   =================================================================== */
.cta-band { padding: 64px 0; }
.cta-band__inner { display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap; }
.cta-band__title { font-size: clamp(22px, 2.6vw, 30px); font-weight: 800; margin: 0 0 8px; letter-spacing: -.3px; }
.cta-band__text { margin: 0; color: var(--muted); font-size: 16px; max-width: 640px; }
.cta-band .btn--primary { background: var(--black); color: #fff; box-shadow: none; }
.cta-band .btn--primary:hover { background: #000; transform: translateY(-2px); }

/* ===================================================================
   КОНТАКТЫ + ФОРМА (на светлой секции)
   =================================================================== */
.contacts { display: grid; grid-template-columns: .85fr 1.15fr; gap: 32px; align-items: start; }
.contacts__info { display: grid; gap: 16px; }
.contact-item {
  display: flex; align-items: center; gap: 16px; padding: 20px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
  transition: border-color .2s, transform .2s;
}
.contact-item:hover { border-color: var(--orange); transform: translateX(3px); }
.contact-item__icon {
  width: 50px; height: 50px; border-radius: 12px; display: grid; place-items: center;
  background: var(--orange-l); border: 1px solid rgba(255,130,46,.35); flex-shrink: 0;
}
.contact-item__icon svg { width: 24px; height: 24px; fill: var(--orange); }
.contact-item__body { display: flex; flex-direction: column; }
.contact-item__label { font-size: 13px; color: var(--muted); }
.contact-item__value { font-size: 18px; font-weight: 800; }

.messengers { display: flex; gap: 12px; }
.msgr {
  display: inline-flex; align-items: center; gap: 10px; flex: 1; justify-content: center;
  padding: 13px; border-radius: 12px; font-weight: 800; border: 1px solid var(--border);
  background: var(--surface); color: var(--text); transition: transform .15s, background .2s, color .2s;
}
.msgr svg { width: 22px; height: 22px; fill: currentColor; }
.msgr:hover { transform: translateY(-2px); }
.msgr--max:hover { background: #4C6FFF; border-color: #4C6FFF; color: #fff; }
.msgr--vk:hover { background: #0077FF; border-color: #0077FF; color: #fff; }

/* форма */
.form {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 34px; box-shadow: var(--shadow); display: grid; gap: 18px;
}
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { display: grid; gap: 7px; }
.field__label { font-weight: 700; font-size: 14px; color: var(--text); }
.field__input {
  width: 100%; padding: 13px 15px; border-radius: 8px;
  background: var(--input-bg); border: 1px solid var(--border); color: var(--text);
  font-family: inherit; font-size: 15px; transition: border-color .2s, box-shadow .2s;
}
.field__input::placeholder { color: var(--placeholder); }
.field__input:focus { outline: none; border-color: var(--orange); box-shadow: 0 0 0 3px rgba(255, 130, 46, .2); }
.field__input--area { resize: vertical; }
.field__input--select { cursor: pointer; }
.field.is-invalid .field__input { border-color: #e23; box-shadow: 0 0 0 3px rgba(238,34,51,.15); }
.field__error { font-size: 13px; color: #e23; min-height: 0; }

.form__submit { width: 100%; padding: 15px; font-size: 16px; }
.form__submit[disabled] { opacity: .7; cursor: progress; }
.form__note { font-size: 12px; color: var(--muted); text-align: center; margin: 0; }
.form__status { padding: 14px 16px; border-radius: 10px; font-weight: 600; text-align: center; }
.form__status.is-ok { background: rgba(34,197,94,.14); border: 1px solid rgba(34,197,94,.45); color: #15803d; }
.form__status.is-err { background: rgba(239,68,68,.12); border: 1px solid rgba(239,68,68,.45); color: #b91c1c; }

/* ===================================================================
   ФУТЕР (чёрный)
   =================================================================== */
.footer { background: var(--black); color: #cfcfcf; border-top: 1px solid rgba(255,255,255,.07); padding-top: 56px; }
.footer__inner { display: grid; grid-template-columns: 1.4fr 1fr 1.1fr; gap: 32px; padding-bottom: 40px; }
.footer .logo__text { color: #fff; }
.footer__about { color: #9a9a9a; margin: 16px 0 0; max-width: 340px; font-size: 14px; }
.footer__nav { display: grid; gap: 11px; align-content: start; }
.footer__link { color: #c4c4c4; }
.footer__link:hover { color: var(--orange); }
.footer__contacts { display: grid; gap: 11px; align-content: start; }
.footer__phone { color: #fff; font-weight: 800; font-size: 17px; }
.footer__email { color: #9a9a9a; font-weight: 600; font-size: 15px; }
.footer__phone:hover, .footer__email:hover { color: var(--orange); }
.footer__msgrs { display: flex; gap: 10px; margin-top: 6px; }
.msgr--sm { width: 44px; height: 44px; padding: 0; flex: none; background: rgba(255,255,255,.05); }
.msgr--sm svg { width: 22px; height: 22px; fill: #fff; }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.07); padding: 18px 0; color: #7a7a7a; font-size: 13px; }

/* ---------- Плавающие кнопки ---------- */
.fab { position: fixed; right: 20px; bottom: 20px; z-index: 90; display: grid; gap: 12px; }
.fab__btn {
  width: 54px; height: 54px; border-radius: 50%; display: grid; place-items: center;
  box-shadow: 0 14px 30px -10px rgba(0,0,0,.5); transition: transform .15s;
  font-weight: 800; font-size: 14px; letter-spacing: .3px; color: #fff;
}
.fab__btn:hover { transform: scale(1.08); }
.fab__btn svg { width: 28px; height: 28px; fill: #fff; }
.fab__btn--max { background: #4C6FFF; }
.fab__btn--vk { background: #0077FF; }
.fab__btn--call { background: var(--orange); animation: pulse 2.4s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(255,130,46,.55); } 70% { box-shadow: 0 0 0 16px rgba(255,130,46,0); } 100% { box-shadow: 0 0 0 0 rgba(255,130,46,0); } }

/* ===================================================================
   АДАПТИВ
   =================================================================== */
@media (max-width: 992px) {
  .hero__inner { grid-template-columns: 1fr; gap: 32px; }
  .hero__visual { display: none; }
  .features, .steps { grid-template-columns: repeat(2, 1fr); }
  .price-grid, .contacts { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .nav {
    position: fixed; top: var(--header-h, 72px); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: rgba(15, 26, 46, .98); backdrop-filter: blur(12px);
    padding: 16px 24px 24px; border-bottom: 1px solid rgba(255,255,255,.08);
    transform: translateY(-130%); transition: transform .3s ease; z-index: 99;
    max-height: calc(100vh - var(--header-h, 72px)); overflow-y: auto;
  }
  .nav.is-open { transform: translateY(0); }
  .nav__link { padding: 14px 12px; font-size: 16px; color: #ddd; }
  .nav__call { margin: 8px 0 0; justify-content: center; padding: 14px; }
  .burger { display: flex; }

  .section { padding: 64px 0; }
  .cta-band { padding: 48px 0; }
  .section__head { margin-bottom: 36px; }
  .cards, .features, .steps { grid-template-columns: 1fr; }
  .hero__stats { gap: 26px; }
  .hero__stats strong { font-size: 24px; }
  .form__row { grid-template-columns: 1fr; gap: 18px; }
  .footer__inner { grid-template-columns: 1fr; gap: 26px; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
  .fab { right: 14px; bottom: 14px; gap: 10px; }
  .fab__btn { width: 50px; height: 50px; }
}

@media (max-width: 420px) {
  .hero__actions .btn { width: 100%; }
  .price-list, .calc, .form { padding: 24px; }
}

/* ---------- Доступность ---------- */
:focus-visible { outline: 2px solid var(--orange); outline-offset: 2px; border-radius: 4px; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; }
  html { scroll-behavior: auto; }
}