/* ============================================================
   ТЕМА — все цвета и шрифты лендинга задаются здесь.
   Для нового клиента достаточно поменять переменные.
   ============================================================ */
:root {
  --bg:        #F2F1ED;  /* бетонно-бумажный фон */
  --surface:   #FFFFFF;
  --tint:      #E9E7E1;  /* фон чередующихся секций */
  --ink:       #23262B;  /* графит — основной текст */
  --ink-soft:  #5C6067;
  --accent:    #E8641B;  /* сигнальный оранжевый */
  --accent-dn: #C9510F;  /* оранжевый при наведении */
  --dark:      #23262B;  /* тёмные секции */
  --dark-2:    #2C3036;  /* карточки на тёмном */
  --on-dark:   #F2F1ED;
  --on-dark-soft: #A9ADB4;
  --line:      #D9D6CF;

  --font-display: "Bitter", Georgia, serif;
  --font-body:    "Manrope", -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;

  --radius: 10px;
  --container: 1120px;
}

/* ---------- база ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
ul[class], ol[class] { list-style: none; }
a { color: inherit; }

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h1 { font-size: clamp(2rem, 4.6vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); margin-bottom: 0.5em; }
h3 { font-size: 1.25rem; font-weight: 700; }

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}
.container--narrow { max-width: 820px; }

.section { padding-block: clamp(64px, 9vw, 110px); }
.section--tint { background: var(--tint); }
.section--dark { background: var(--dark); color: var(--on-dark); }
.section__sub { max-width: 560px; color: var(--ink-soft); margin-bottom: 40px; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 14px;
}
.eyebrow--light { color: var(--accent); }

/* ---------- кнопки ---------- */
.btn {
  display: inline-block;
  padding: 14px 28px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.15s;
  font-family: var(--font-body);
}
.btn:hover { background: var(--accent-dn); border-color: var(--accent-dn); }
.btn:active { transform: translateY(1px); }
.btn--ghost {
  background: transparent;
  color: inherit;
  border-color: currentColor;
}
.btn--ghost:hover { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.section--dark .btn--ghost:hover { background: var(--on-dark); border-color: var(--on-dark); color: var(--ink); }
.btn--small { padding: 10px 18px; font-size: 0.9rem; }
.btn--block { display: block; width: 100%; text-align: center; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- шапка ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 68px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.15rem;
}
.logo__mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  font-size: 1.05rem;
}
.logo__text em { font-style: normal; color: var(--accent); }

.nav {
  display: flex;
  gap: 22px;
  margin-inline: auto;
}
.nav a {
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink-soft);
  transition: color 0.15s;
}
.nav a:hover { color: var(--ink); }

.header__actions {
  display: flex;
  align-items: center;
  gap: 18px;
}
.header__phone {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  white-space: nowrap;
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.burger span {
  width: 24px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s, opacity 0.2s;
}
.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); }

/* ---------- хиро ---------- */
.hero {
  position: relative;
  padding-block: clamp(72px, 10vw, 130px) 0;
  /* чертёжная сетка */
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: center top;
}
.hero__inner { position: relative; }
.hero__content { max-width: 640px; }
.hero__sub {
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 520px;
  margin-top: 20px;
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: clamp(48px, 7vw, 84px);
  padding: 28px 0 44px;
  border-top: 2px solid var(--ink);
}
.stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 700;
}
.stat__label {
  font-size: 0.85rem;
  color: var(--ink-soft);
}

/* сигнальная лента-разделитель */
.tape {
  height: 14px;
  background: repeating-linear-gradient(
    -45deg,
    var(--accent) 0 18px,
    var(--ink) 18px 36px
  );
}

/* ---------- пакеты ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 44px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  display: flex;
  flex-direction: column;
}
.card--featured {
  border: 2px solid var(--accent);
  position: relative;
}
.card__badge {
  position: absolute;
  top: -13px;
  left: 24px;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 99px;
}
.card__price {
  font-family: var(--font-mono);
  color: var(--ink-soft);
  margin: 10px 0 18px;
}
.card__price b {
  color: var(--ink);
  font-size: 1.5rem;
  font-weight: 700;
}
.card ul {
  flex: 1;
  margin-bottom: 26px;
  display: grid;
  gap: 9px;
  font-size: 0.95rem;
  color: var(--ink-soft);
}
.card ul li {
  padding-left: 22px;
  position: relative;
}
.card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52em;
  width: 12px;
  height: 5px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

/* ---------- калькулятор ---------- */
.calc {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 22px;
  margin-top: 40px;
}
.calc__controls,
.calc__result {
  background: var(--dark-2);
  border: 1px solid #3A3F46;
  border-radius: var(--radius);
  padding: 32px 30px;
}
.calc__field { margin-bottom: 28px; border: 0; }
.calc__field label,
.calc__field legend {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 14px;
  color: var(--on-dark);
}
.calc__range-row {
  display: flex;
  align-items: center;
  gap: 18px;
}
.calc__range-row output {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  min-width: 88px;
  text-align: right;
  color: var(--accent);
}
input[type="range"] {
  flex: 1;
  appearance: none;
  height: 6px;
  border-radius: 99px;
  background: #464C54;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--dark-2);
  box-shadow: 0 0 0 1px var(--accent);
}
input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--dark-2);
  box-shadow: 0 0 0 1px var(--accent);
}

.calc__radios { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { cursor: pointer; }
.chip input { position: absolute; opacity: 0; }
.chip span {
  display: inline-block;
  padding: 9px 18px;
  border: 1px solid #4A505A;
  border-radius: 99px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--on-dark-soft);
  transition: all 0.15s;
}
.chip input:checked + span {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.chip input:focus-visible + span {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.calc__check {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 0.95rem;
  color: var(--on-dark-soft);
}
.calc__check input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.calc__result { display: flex; flex-direction: column; }
.calc__result-label {
  font-size: 0.9rem;
  color: var(--on-dark-soft);
}
.calc__result-num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  font-weight: 700;
  color: var(--accent);
  margin: 10px 0 14px;
}
.calc__result-note {
  font-size: 0.9rem;
  color: var(--on-dark-soft);
  flex: 1;
  margin-bottom: 24px;
}

/* ---------- кейсы ---------- */
.cases {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-top: 44px;
}
.case {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.case__photo {
  aspect-ratio: 16 / 8;
  display: grid;
  place-items: center;
  position: relative;
}
.case__photo span {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.85);
  border: 1px dashed rgba(255, 255, 255, 0.5);
  padding: 6px 14px;
  border-radius: 99px;
}
/* плейсхолдеры фото — заменить на реальные снимки объектов */
.case__photo--1 { background: linear-gradient(120deg, #7D8794, #4E5560); }
.case__photo--2 { background: linear-gradient(120deg, #A08A72, #6E5D4B); }
.case__photo--3 { background: linear-gradient(120deg, #8A9284, #565E52); }
.case__photo--4 { background: linear-gradient(120deg, #948490, #5C5058); }
.case__body { padding: 24px 26px 28px; }
.case__meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin: 6px 0 12px;
}
.case__body p:last-child {
  font-size: 0.95rem;
  color: var(--ink-soft);
}

/* ---------- этапы ---------- */
.steps {
  counter-reset: step;
  margin-top: 44px;
  display: grid;
  gap: 0;
}
.step {
  counter-increment: step;
  position: relative;
  padding: 26px 0 26px 84px;
  border-top: 1px solid var(--line);
}
.step:last-child { border-bottom: 1px solid var(--line); }
.step::before {
  content: "0" counter(step);
  position: absolute;
  left: 0;
  top: 24px;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}
.step h3 { margin-bottom: 6px; }
.step p {
  color: var(--ink-soft);
  max-width: 640px;
  font-size: 0.98rem;
}

/* ---------- отзывы ---------- */
.reviews {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 44px;
}
.review {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
}
.review p {
  flex: 1;
  font-size: 0.98rem;
}
.review footer {
  margin-top: 18px;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

/* ---------- FAQ ---------- */
.faq {
  margin-top: 40px;
  display: grid;
  gap: 12px;
}
.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 24px;
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
  padding: 20px 36px 20px 0;
  position: relative;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--accent);
  transition: transform 0.2s;
}
.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p {
  padding-bottom: 22px;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

/* ---------- форма ---------- */
.lead {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: start;
}
.lead__text > p:not(.eyebrow) {
  color: var(--on-dark-soft);
  margin-top: 16px;
  max-width: 460px;
}
.lead__contacts {
  margin-top: 30px;
  display: grid;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.98rem;
}
.lead__contacts a {
  color: var(--accent);
  text-decoration: none;
}
.lead__contacts a:hover { text-decoration: underline; }

.form {
  background: var(--dark-2);
  border: 1px solid #3A3F46;
  border-radius: var(--radius);
  padding: 34px 30px;
}
.form__field { margin-bottom: 20px; }
.form__field label {
  display: block;
  font-weight: 600;
  font-size: 0.92rem;
  margin-bottom: 8px;
}
.form__field label span {
  font-weight: 400;
  color: var(--on-dark-soft);
}
.form input[type="text"],
.form input[type="tel"],
.form textarea {
  width: 100%;
  padding: 13px 16px;
  background: var(--dark);
  border: 1px solid #4A505A;
  border-radius: 8px;
  color: var(--on-dark);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color 0.15s;
}
.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form input::placeholder,
.form textarea::placeholder { color: #6B707A; }
.form textarea { resize: vertical; }

.form__consent {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.85rem;
  color: var(--on-dark-soft);
  margin-bottom: 22px;
  cursor: pointer;
}
.form__consent input {
  margin-top: 3px;
  accent-color: var(--accent);
}
.form__status {
  margin-top: 14px;
  font-size: 0.92rem;
  min-height: 1.4em;
}
.form__status.is-ok { color: #7BC47F; }
.form__status.is-err { color: #E88; }

/* ---------- футер ---------- */
.footer {
  background: var(--dark);
  color: var(--on-dark-soft);
  border-top: 1px solid #3A3F46;
  padding-block: 28px;
  font-size: 0.85rem;
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 32px;
  justify-content: space-between;
}
.footer a { color: inherit; }

/* ---------- появление при скролле ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- адаптив ---------- */
@media (max-width: 960px) {
  .cards, .reviews { grid-template-columns: 1fr; max-width: 560px; margin-inline: auto; }
  .cards { margin-top: 44px; }
  .calc { grid-template-columns: 1fr; }
  .cases { grid-template-columns: 1fr; max-width: 560px; margin-inline: auto; margin-top: 44px; }
  .lead { grid-template-columns: 1fr; }
  .header__phone { display: none; }
}

@media (max-width: 720px) {
  body { font-size: 16px; }

  .nav {
    position: fixed;
    inset: 68px 0 auto 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    gap: 0;
    padding: 8px 24px 16px;
    transform: translateY(-130%);
    transition: transform 0.25s ease;
    z-index: 40;
  }
  .nav.is-open { transform: none; }
  .nav a { padding: 12px 0; font-size: 1.05rem; }

  .burger { display: flex; }
  .header__actions .btn { display: none; }

  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 16px;
  }
  .step { padding-left: 56px; }
  .step::before { font-size: 1.1rem; top: 28px; }
}