:root {
  --bg: #0f1112;
  --bg-2: #161a1c;
  --surface: #1c2124;
  --line: rgba(255, 255, 255, 0.09);
  --text: #eceae6;
  --muted: #a3a8aa;
  --accent: #e0893f;
  --accent-2: #f2a764;
  --wood: #b98556;
  --light-bg: #f3efe8;
  --light-text: #1a1d1f;
  --radius: 18px;
  --container: 1200px;
  --font-head: "Unbounded", "Arial Black", system-ui, sans-serif;
  --font-body: "Manrope", "Helvetica Neue", Arial, system-ui, sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(100% - 40px, var(--container));
  margin-inline: auto;
}

h1, h2, h3 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.12;
  margin: 0;
  letter-spacing: -0.01em;
}

h2 { font-size: clamp(28px, 4vw, 46px); }
h3 { font-size: 20px; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.section { padding: clamp(70px, 10vw, 120px) 0; }
.section--alt { background: var(--bg-2); }
.section--light { background: var(--light-bg); color: var(--light-text); }
.section--light .lead { color: #4b5256; }

.section-head {
  max-width: 760px;
  margin-bottom: 48px;
}

.lead {
  color: var(--muted);
  font-size: 19px;
  margin: 16px 0 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 28px;
  border-radius: 999px;
  border: 1px solid transparent;
  font: 700 16px/1 var(--font-body);
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: #17100a; }
.btn--primary:hover { background: var(--accent-2); }
.btn--ghost { border-color: rgba(255, 255, 255, 0.35); color: #fff; background: rgba(0, 0, 0, 0.2); backdrop-filter: blur(6px); }
.btn--ghost:hover { border-color: #fff; }
.btn--block { width: 100%; }

/* Header */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  transition: background 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.header.is-scrolled {
  background: rgba(15, 17, 18, 0.88);
  backdrop-filter: blur(12px);
  border-color: var(--line);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  text-decoration: none;
}
.logo__mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: repeating-linear-gradient(90deg, var(--accent) 0 4px, #c4702c 4px 7px);
}
.nav { display: flex; gap: 28px; }
.nav a { text-decoration: none; font-weight: 600; font-size: 15px; color: #d9dbdc; }
.nav a:hover { color: var(--accent-2); }
.header__contact { display: flex; align-items: center; gap: 18px; }
.header__phone { font-weight: 700; text-decoration: none; white-space: nowrap; }
.header__contact .btn { padding: 12px 20px; font-size: 14px; }
.burger { display: none; background: none; border: 0; color: #fff; font-size: 28px; cursor: pointer; }

/* Hero */
.hero {
  position: relative;
  min-height: min(100svh, 980px);
  display: flex;
  align-items: flex-end;
  padding: 140px 0 60px;
  isolation: isolate;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: url("../img/hero.jpg") center / cover no-repeat;
}
.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 11, 12, 0.55) 0%, rgba(10, 11, 12, 0.1) 35%, rgba(10, 11, 12, 0.85) 100%),
    linear-gradient(90deg, rgba(10, 11, 12, 0.7) 0%, rgba(10, 11, 12, 0) 60%);
}
.hero h1 {
  font-size: clamp(30px, 6vw, 76px);
  max-width: 900px;
  overflow-wrap: break-word;
  hyphens: auto;
}
.hero h1 span { color: var(--accent-2); }
.hero__sub {
  max-width: 620px;
  font-size: clamp(17px, 2vw, 21px);
  color: #e3e1dd;
  margin: 22px 0 34px;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; }
.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 64px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(10px);
}
.stat { background: rgba(15, 17, 18, 0.62); padding: 22px 24px; }
.stat b { display: block; font-family: var(--font-head); font-size: clamp(22px, 3vw, 34px); color: #fff; }
.stat span { color: var(--muted); font-size: 14px; }

/* Advantages */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.adv {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.adv__num { font-family: var(--font-head); color: var(--accent); font-size: 14px; }
.adv h3 { margin: 18px 0 10px; }
.adv p { margin: 0; color: var(--muted); font-size: 16px; }

/* Projects */
.projects {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* Plan */
.plan { margin: 0; overflow-x: auto; }
.plan svg { width: 100%; min-width: 640px; height: auto; display: block; }
.plan__wall { fill: #2a3034; stroke: var(--accent); stroke-width: 3; }
.plan__room { fill: var(--surface); stroke: rgba(255, 255, 255, 0.25); stroke-width: 2; }
.plan__room--main { fill: #242a2d; }
.plan__opening { fill: #8fc3e8; }
.plan__name { fill: var(--text); font: 600 26px var(--font-body); text-anchor: middle; }
.plan__area { fill: var(--accent-2); font: 700 30px var(--font-head); text-anchor: middle; }
.plan figcaption { margin-top: 16px; color: var(--muted); font-size: 15px; }

/* Banner */
.banner { aspect-ratio: 21 / 8; overflow: hidden; background: var(--bg-2); }
.banner img { width: 100%; height: 100%; object-fit: cover; }
.project {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
}
.project__img { aspect-ratio: 16 / 10; overflow: hidden; }
.project__img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.project:hover .project__img img { transform: scale(1.04); }
.project__body { padding: 26px 28px 28px; display: flex; flex-direction: column; gap: 14px; flex: 1; }
.project__top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.project__tag { font-size: 13px; color: var(--muted); }
.project__specs { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.project__specs li { padding: 6px 12px; border-radius: 999px; background: rgba(255, 255, 255, 0.06); font-size: 14px; }
.project__foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: auto; padding-top: 8px; }
.price { font-family: var(--font-head); font-size: 24px; }
.price small { font-family: var(--font-body); font-size: 14px; color: var(--muted); font-weight: 500; }
.project .btn { padding: 12px 20px; font-size: 14px; }

/* Packages */
.packages { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.package {
  padding: 34px 30px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid #e3ddd2;
  display: flex;
  flex-direction: column;
}
.package--hit { background: var(--light-text); color: #fff; border-color: var(--light-text); position: relative; }
.package--hit .package__note { color: #b7bcbe; }
.package__badge {
  position: absolute;
  top: -13px;
  left: 30px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--accent);
  color: #17100a;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.package__note { color: #6b7275; font-size: 15px; margin: 8px 0 22px; }
.package ul { list-style: none; margin: 0 0 26px; padding: 0; display: grid; gap: 10px; font-size: 16px; }
.package li { padding-left: 26px; position: relative; }
.package li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 800; }
.package__price { margin-top: auto; font-family: var(--font-head); font-size: 22px; margin-bottom: 18px; }

/* Included / transparency */
.included { display: grid; grid-template-columns: 1.1fr 1fr; gap: 50px; align-items: center; }
.included__list { display: grid; gap: 1px; background: var(--line); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); }
.included__row { display: flex; justify-content: space-between; gap: 20px; padding: 18px 24px; background: var(--surface); }
.included__row span:last-child { color: var(--accent-2); font-weight: 700; white-space: nowrap; }
.included__img { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4 / 3; }
.included__img img { width: 100%; height: 100%; object-fit: cover; }

/* Production */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split__img { border-radius: var(--radius); overflow: hidden; aspect-ratio: 4 / 3; }
.split__img img { width: 100%; height: 100%; object-fit: cover; }
.checklist { list-style: none; padding: 0; margin: 28px 0 32px; display: grid; gap: 14px; }
.checklist li { display: flex; gap: 14px; }
.checklist li::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  margin-top: 9px;
  border-radius: 2px;
  background: var(--accent);
}

/* Gallery */
.gallery {
  display: grid;
  grid-template-columns: 2fr 1fr;
  grid-template-rows: repeat(2, minmax(200px, 1fr));
  gap: 16px;
}
.gallery figure { margin: 0; position: relative; border-radius: var(--radius); overflow: hidden; }
.gallery figure:first-child { grid-row: span 2; }
.gallery img { width: 100%; height: 100%; object-fit: cover; }
.gallery figcaption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(15, 17, 18, 0.7);
  backdrop-filter: blur(6px);
  font-size: 14px;
  font-weight: 600;
}

/* Business */
.business {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  min-height: 520px;
  display: flex;
  align-items: flex-end;
  padding: clamp(28px, 5vw, 60px);
  isolation: isolate;
}
.business > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.business::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(0deg, rgba(10, 11, 12, 0.92) 0%, rgba(10, 11, 12, 0.2) 70%);
}
.business__content { max-width: 720px; }
.business__tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 28px; padding: 0; list-style: none; }
.business__tags li { padding: 8px 16px; border: 1px solid rgba(255, 255, 255, 0.3); border-radius: 999px; font-size: 15px; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; counter-reset: step; }
.step { padding: 26px 22px; border-top: 2px solid var(--accent); background: var(--surface); border-radius: 0 0 var(--radius) var(--radius); }
.step__day { font-size: 13px; font-weight: 800; color: var(--accent); letter-spacing: 0.08em; text-transform: uppercase; }
.step h3 { font-size: 17px; margin: 12px 0 8px; }
.step p { margin: 0; font-size: 15px; color: var(--muted); }

/* Calculator */
.calc { display: grid; grid-template-columns: 1.3fr 1fr; gap: 24px; }
.calc__form, .calc__result {
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}
.calc__group { border: 0; padding: 0; margin: 0 0 28px; }
.calc__group legend { font-weight: 700; margin-bottom: 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  cursor: pointer;
  font-size: 15px;
  transition: all 0.2s ease;
}
.chip input:checked + span { background: var(--accent); border-color: var(--accent); color: #17100a; font-weight: 700; }
.chip input:focus-visible + span { outline: 2px solid var(--accent-2); outline-offset: 2px; }
.range { width: 100%; accent-color: var(--accent); }
.range-value { color: var(--accent-2); font-weight: 700; }
.calc__result { position: sticky; top: 96px; align-self: start; }
.calc__total { font-family: var(--font-head); font-size: clamp(32px, 4vw, 44px); margin: 6px 0 4px; }
.calc__breakdown { list-style: none; padding: 0; margin: 22px 0; display: grid; gap: 10px; font-size: 15px; }
.calc__breakdown li { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); }
.calc__breakdown li b { color: var(--text); font-weight: 600; white-space: nowrap; }
.field { display: block; margin-bottom: 12px; }
.field input {
  width: 100%;
  padding: 15px 18px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(0, 0, 0, 0.25);
  color: var(--text);
  font: 500 16px var(--font-body);
}
.field input:focus { outline: none; border-color: var(--accent); }
.field input[aria-invalid="true"] { border-color: #e2574c; }
.form-note { font-size: 13px; color: var(--muted); margin: 10px 0 0; }
.form-status { margin: 12px 0 0; font-weight: 600; min-height: 1.4em; }
.form-status.is-error { color: #ff8a80; }
.form-status.is-ok { color: #8bd49a; }

/* Guarantee */
.guarantee { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.guarantee__big {
  grid-row: span 2;
  padding: 40px;
  border-radius: var(--radius);
  background: var(--accent);
  color: #17100a;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.guarantee__big b { font-family: var(--font-head); font-size: clamp(52px, 5.6vw, 84px); line-height: 1; white-space: nowrap; }
.guarantee__item { padding: 28px; border-radius: var(--radius); background: #fff; border: 1px solid #e3ddd2; }
.guarantee__item h3 { font-size: 17px; margin-bottom: 8px; }
.guarantee__item p { margin: 0; color: #5a6164; font-size: 15px; }

/* FAQ */
.faq { max-width: 860px; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 24px 40px 24px 0;
  font-weight: 700;
  font-size: 18px;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 18px;
  font-size: 28px;
  color: var(--accent);
  transition: transform 0.2s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq p { margin: 0 0 24px; color: var(--muted); }

/* Contacts / footer */
.contacts { position: relative; isolation: isolate; overflow: hidden; }
.contacts > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.contacts::after { content: ""; position: absolute; inset: 0; z-index: -1; background: rgba(10, 11, 12, 0.82); }
.contacts__grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; }
.contact-list { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 18px; }
.contact-list small { display: block; color: var(--muted); font-size: 13px; text-transform: uppercase; letter-spacing: 0.1em; }
.contact-list a, .contact-list span { font-size: 20px; font-weight: 700; text-decoration: none; }
.footer { padding: 30px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.footer__inner { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* Responsive */
@media (max-width: 1080px) {
  .nav, .header__phone { display: none; }
  .burger { display: block; }
  .nav.is-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    padding: 24px 20px;
    background: rgba(15, 17, 18, 0.97);
    border-bottom: 1px solid var(--line);
  }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .projects { grid-template-columns: repeat(2, 1fr); }
  .adv-grid, .packages, .guarantee { grid-template-columns: 1fr 1fr; }
  .guarantee__big { grid-row: auto; grid-column: span 2; }
}

@media (max-width: 820px) {
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .projects, .split, .included, .calc, .contacts__grid { grid-template-columns: 1fr; }
  .banner { aspect-ratio: 16 / 9; }
  .gallery { grid-template-columns: 1fr; grid-template-rows: none; }
  .gallery figure { aspect-ratio: 4 / 3; }
  .gallery figure:first-child { grid-row: auto; }
  .calc__result { position: static; }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  h2 { font-size: 26px; }
  .hero h1 { font-size: 29px; }
  .header__contact .btn { display: none; }
  .adv-grid, .packages, .guarantee, .steps { grid-template-columns: 1fr; }
  .guarantee__big { grid-column: auto; }
  .project__foot { flex-direction: column; align-items: flex-start; }
}