/* ============================================================
   ТЕМА «ГРАФИТ» — тёмный асфальт + янтарь
   ============================================================ */
:root {
  --bg:        #0F1114;
  --surface:   #171A1F;
  --tint:      #14171B;
  --ink:       #ECEFF4;
  --ink-soft:  #9AA3AF;
  --accent:    #E9A13B;  /* янтарь — тёплый свет ламп */
  --accent-dn: #C98424;
  --dark:      #0B0D10;  /* секция формы — глубже фона */
  --dark-2:    #171A1F;
  --on-dark:   #ECEFF4;
  --on-dark-soft: #9AA3AF;
  --line:      #262B33;

  --font-display: "Unbounded", sans-serif;
  --font-body:    "Onest", -apple-system, sans-serif;
  --font-mono:    "JetBrains Mono", ui-monospace, monospace;

  --radius: 12px;
  --container: 1120px;
}

*, *::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: 1.12;
  font-weight: 700;
  letter-spacing: 0;
  text-wrap: balance;
}
h1 { font-size: clamp(1.9rem, 4.2vw, 3.1rem); }
h2 { font-size: clamp(1.4rem, 2.8vw, 2.1rem); margin-bottom: 0.5em; }
h3 { font-size: 1.05rem; font-weight: 700; line-height: 1.3; }

.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); border-block: 1px solid var(--line); }
.section--dark { background: var(--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: 0.16em;
  color: var(--accent);
  margin-bottom: 14px;
}

/* ---------- кнопки ---------- */
.btn {
  display: inline-block;
  padding: 14px 28px;
  background: var(--accent);
  color: #14100A;
  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: var(--ink); border-color: var(--line); }
.btn--ghost:hover { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.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) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header__inner { display: flex; align-items: center; gap: 28px; height: 68px; }
.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.logo 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(80px, 11vw, 140px) clamp(48px, 6vw, 72px);
  background:
    radial-gradient(900px 420px at 78% -8%, rgba(233, 161, 59, 0.14), transparent 65%),
    radial-gradient(700px 380px at 12% 110%, rgba(70, 90, 120, 0.18), transparent 60%),
    var(--bg);
  overflow: hidden;
}
.hero__content { max-width: 680px; }
.hero__sub { font-size: 1.12rem; color: var(--ink-soft); max-width: 540px; 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, 80px);
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  font-weight: 700;
  color: var(--accent);
}
.stat__label { font-size: 0.85rem; color: var(--ink-soft); }

/* ---------- до/после ---------- */
.ba {
  position: relative;
  aspect-ratio: 16 / 8;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  user-select: none;
}
/* плейсхолдеры: заменить на реальные фото (before/after) */
.ba__after,
.ba__before {
  position: absolute;
  inset: 0;
}
.ba__after {
  background:
    radial-gradient(600px 300px at 70% 20%, rgba(255, 255, 255, 0.22), transparent 55%),
    linear-gradient(115deg, #2A3644 0%, #10151C 55%, #253243 100%);
}
.ba__before {
  /* ширина управляется из JS через --pos */
  width: var(--pos, 50%);
  overflow: hidden;
  border-right: 2px solid var(--accent);
  background:
    radial-gradient(500px 260px at 30% 30%, rgba(120, 110, 95, 0.25), transparent 60%),
    linear-gradient(115deg, #4A453C 0%, #2E2B25 55%, #3E3A32 100%);
}
.ba__tag {
  position: absolute;
  top: 18px;
  left: 18px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 5px 12px;
  border-radius: 99px;
  background: rgba(0, 0, 0, 0.45);
  color: #D9CDB8;
  border: 1px solid rgba(255, 255, 255, 0.18);
}
.ba__tag--after { left: auto; right: 18px; color: var(--accent); }
.ba__handle {
  position: absolute;
  top: 50%;
  left: var(--pos, 50%);
  transform: translate(-50%, -50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  display: grid;
  place-items: center;
  pointer-events: none;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.45);
}
.ba__handle::before {
  content: "◂ ▸";
  font-size: 0.8rem;
  color: #14100A;
  letter-spacing: 0.05em;
}
.ba input[type="range"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: ew-resize;
  appearance: none;
}
.ba__caption {
  margin-top: 16px;
  font-size: 0.9rem;
  color: var(--ink-soft);
  font-family: var(--font-mono);
}

/* ---------- услуги ---------- */
.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-color: var(--accent); position: relative; }
.card__badge {
  position: absolute;
  top: -13px;
  left: 24px;
  background: var(--accent);
  color: #14100A;
  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: 12px 0 18px; font-size: 0.9rem; }
.card__price b { color: var(--ink); font-size: 1.35rem; 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);
}

/* ---------- этапы ---------- */
.steps { counter-reset: step; margin-top: 44px; display: grid; }
.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: 3px 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(--ink-soft); margin-top: 16px; max-width: 460px; }
.lead__contacts { margin-top: 30px; display: grid; gap: 10px; font-family: var(--font-mono); font-size: 0.95rem; }
.lead__contacts a { color: var(--accent); text-decoration: none; }
.lead__contacts a:hover { text-decoration: underline; }

.form { background: var(--dark-2); border: 1px solid var(--line); 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(--ink-soft); }
.form input[type="text"],
.form input[type="tel"],
.form textarea {
  width: 100%;
  padding: 13px 16px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  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: #5C636E; }
.form textarea { resize: vertical; }
.form__consent {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 0.85rem;
  color: var(--ink-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(--ink-soft); border-top: 1px solid var(--line); 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; 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; }
  .ba { aspect-ratio: 4 / 3; }
  .step { padding-left: 56px; }
  .step::before { font-size: 1.1rem; top: 28px; }
}