/* ============================================================
   «Уста» — ремонт квартир. Стили.
   Палитра меняется в блоке :root ниже.
   ============================================================ */

:root {
  --ink:        #1c1917;   /* графит — основной тёмный */
  --ink-2:      #292524;
  --gray:       #57534e;   /* второстепенный текст */
  --amber:      #f59e0b;   /* акцент */
  --amber-d:    #b45309;
  --amber-soft: #fef3c7;
  --wa:         #25d366;
  --wa-d:       #1da851;
  --bg:         #ffffff;
  --tint:       #faf8f5;   /* тёплая подложка */
  --line:       #e7e2db;
  --r:          12px;      /* скругление — квадратнее, чем у стоматологии */
  --sh:         0 4px 20px rgba(28, 25, 23, .08);
  --w:          1140px;
  --font:       system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  scroll-padding-top: 80px;
  padding-bottom: 68px;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--amber-d); }

h1, h2, h3 { line-height: 1.2; letter-spacing: -.01em; }
h1 { font-size: clamp(1.9rem, 5.2vw, 3.1rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 4vw, 2.2rem); font-weight: 800; margin-bottom: .5rem; }
h3 { font-size: 1.12rem; font-weight: 700; }

.wrap { width: 100%; max-width: var(--w); margin: 0 auto; padding: 0 20px; }
.wrap--narrow { max-width: 780px; }

.sec { padding: 56px 0; }
.sec--tint { background: var(--tint); }
.sec--dark { background: var(--ink); color: #e7e5e4; }
.sec--dark h2 { color: #fff; }
.sub { color: var(--gray); max-width: 62ch; margin-bottom: 1.6rem; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: #fff;
  padding: 10px 16px; z-index: 200;
}
.skip-link:focus { left: 0; }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; border-radius: 4px; }

/* ---------- Кнопки (квадратнее, чем в первом демо) ---------- */
.b {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 22px; border-radius: 10px;
  font-weight: 700; font-size: 1rem; line-height: 1.1;
  text-decoration: none; border: 2px solid transparent; cursor: pointer;
  transition: background-color .15s ease, transform .06s ease, border-color .15s ease;
  font-family: inherit;
}
.b:active { transform: translateY(1px); }
.b--lg { padding: 16px 28px; font-size: 1.05rem; }
.b--full { width: 100%; }

.b--wa    { background: var(--wa); color: #06331d; }
.b--wa:hover { background: var(--wa-d); }
.b--amber { background: var(--amber); color: #451a03; }
.b--amber:hover { background: var(--amber-d); color: #fff; }
.b--dark  { background: var(--ink); color: #fff; }
.b--dark:hover { background: var(--ink-2); }
.b--out   { background: transparent; color: var(--ink); border-color: var(--line); }
.b--out:hover { border-color: var(--ink); }
.sec--dark .b--out { color: #e7e5e4; border-color: #57534e; }

.i { width: 20px; height: 20px; fill: currentColor; flex: none; }

/* ---------- Шапка ---------- */
.hdr {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.hdr__in { display: flex; align-items: center; gap: 14px; min-height: 66px; }

.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); flex: none; }
.logo__mark {
  display: inline-grid; place-items: center;
  width: 38px; height: 38px; border-radius: 9px;
  background: var(--ink); color: var(--amber);
  font-weight: 800; font-size: 1.05rem;
}
.logo__txt { display: flex; flex-direction: column; line-height: 1.15; }
.logo__txt b { font-size: 1.05rem; font-weight: 800; }
.logo__txt small { font-size: .72rem; color: var(--gray); }

.menu { display: none; gap: 18px; }
.menu a { text-decoration: none; color: var(--gray); font-size: .95rem; font-weight: 600; }
.menu a:hover { color: var(--ink); }

.hdr__act { display: flex; align-items: center; gap: 10px; margin-left: auto; }

.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.lang button {
  border: 0; background: #fff; padding: 7px 10px;
  font-size: .8rem; font-weight: 800; color: var(--gray); cursor: pointer; font-family: inherit;
}
.lang button.on { background: var(--ink); color: #fff; }

.hdr__act .b--wa { display: none; }

.burger {
  display: inline-flex; flex-direction: column; justify-content: center; gap: 4px;
  width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 9px;
  background: #fff; cursor: pointer;
}
.burger span { display: block; width: 20px; height: 2px; background: var(--ink); margin: 0 auto; transition: transform .2s, opacity .2s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.menu.open {
  display: flex; flex-direction: column;
  position: absolute; top: 100%; left: 0; right: 0;
  background: #fff; border-bottom: 1px solid var(--line);
  padding: 10px 20px 16px; gap: 0; box-shadow: var(--sh);
}
.menu.open a { padding: 11px 0; border-bottom: 1px solid var(--line); }
.menu.open a:last-child { border-bottom: 0; }

/* ---------- Первый экран ---------- */
.hero { background: linear-gradient(180deg, var(--tint), #fff); padding: 34px 0 46px; }
.hero__in { display: grid; gap: 28px; }
.tag {
  display: inline-block; background: var(--amber-soft); color: var(--amber-d);
  padding: 5px 12px; border-radius: 6px;
  font-size: .78rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase;
  margin-bottom: 14px;
}
.hero h1 { margin-bottom: 14px; }
.big { font-size: 1.1rem; color: var(--gray); max-width: 54ch; margin-bottom: 24px; }
.hero__btns { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 26px; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; border-top: 1px solid var(--line); padding-top: 18px; }
.stats dt { font-size: 1.15rem; font-weight: 800; color: var(--ink); }
.stats dd { font-size: .84rem; color: var(--gray); margin-top: 2px; }

.hero__img img { border-radius: var(--r); box-shadow: var(--sh); width: 100%; }

/* ---------- Тарифы ---------- */
.tiers { display: grid; gap: 16px; margin-bottom: 44px; }
.tier {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r);
  padding: 26px 22px; position: relative; display: flex; flex-direction: column;
}
.tier--hit { border-color: var(--amber); border-width: 2px; box-shadow: var(--sh); }
.tier__badge {
  position: absolute; top: -12px; left: 22px;
  background: var(--amber); color: #451a03;
  font-size: .72rem; font-weight: 800; text-transform: uppercase; letter-spacing: .04em;
  padding: 5px 10px; border-radius: 6px;
}
.tier h3 { font-size: 1.25rem; margin-bottom: 6px; }
.tier__p { font-size: 1.7rem; font-weight: 800; margin-bottom: 10px; }
.tier__p span { font-size: .95rem; font-weight: 500; color: var(--gray); }
.tier__p small { font-size: .85rem; font-weight: 500; color: var(--gray); }
.tier__d { color: var(--gray); font-size: .95rem; margin-bottom: 16px; }

.ticks { list-style: none; margin-bottom: 20px; flex: 1; }
.ticks li { position: relative; padding-left: 26px; margin-bottom: 8px; font-size: .95rem; }
.ticks li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--amber-d); font-weight: 800;
}

.mini-h { margin-bottom: 14px; font-size: 1.15rem; }
.chips { display: grid; gap: 10px; }
.chip {
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
  background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 18px; text-decoration: none; color: var(--ink);
  transition: border-color .15s ease;
}
.chip:hover { border-color: var(--ink); }
.chip b { font-weight: 700; font-size: .98rem; }
.chip > span { color: var(--gray); font-size: .92rem; white-space: nowrap; font-weight: 600; }

/* ---------- Калькулятор ---------- */
.calc__wrap { display: grid; gap: 26px; }
.calc__intro p { color: #d6d3d1; max-width: 52ch; }
.calc__note { font-size: .86rem; color: #a8a29e; margin-top: 12px; }

.calc { background: #fff; color: var(--ink); border-radius: var(--r); padding: 24px; }
.f { display: block; margin-bottom: 20px; border: 0; }
.f > span, .f legend { display: block; font-size: .9rem; font-weight: 700; margin-bottom: 8px; padding: 0; }
.calc input[type="number"] {
  width: 100%; border: 1px solid var(--line); border-radius: 9px;
  padding: 12px 14px; font: inherit; font-size: 1.05rem; font-weight: 700; color: var(--ink);
}
.calc input[type="number"]:focus { border-color: var(--amber); outline: none; box-shadow: 0 0 0 3px var(--amber-soft); }

.radios, .checks { display: grid; gap: 8px; }
.radios label, .checks label {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--line); border-radius: 9px; padding: 11px 14px;
  cursor: pointer; font-size: .95rem;
}
.radios label:has(input:checked), .checks label:has(input:checked) {
  border-color: var(--amber); background: var(--amber-soft);
}
.radios input, .checks input { width: 18px; height: 18px; accent-color: var(--amber-d); flex: none; }

.calc__out { background: var(--tint); border-radius: 10px; padding: 18px; margin-bottom: 18px; text-align: center; }
.calc__label { font-size: .84rem; color: var(--gray); font-weight: 600; }
.calc__sum { font-size: clamp(1.6rem, 6vw, 2.2rem); font-weight: 800; margin: 4px 0; }
.calc__hint { font-size: .86rem; color: var(--gray); }

/* ---------- Галерея работ ---------- */
.gal { display: grid; gap: 16px; }
.gal figure { border-radius: var(--r); overflow: hidden; border: 1px solid var(--line); background: #fff; }
.gal img { width: 100%; }
.gal figcaption { padding: 12px 16px; font-size: .9rem; color: var(--gray); }

.notice {
  background: var(--amber-soft); border: 1px solid #fcd34d; color: #92400e;
  padding: 12px 16px; border-radius: 10px; font-size: .92rem; margin-bottom: 18px;
}

/* ---------- Карточки «почему» ---------- */
.cards { display: grid; gap: 16px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 22px; }
.card__n { display: block; font-size: .8rem; font-weight: 800; color: var(--amber-d); margin-bottom: 8px; letter-spacing: .06em; }
.card h3 { margin-bottom: 6px; }
.card p { color: var(--gray); font-size: .95rem; }

/* ---------- Этапы ---------- */
.road { list-style: none; display: grid; gap: 14px; counter-reset: none; }
.road li {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r);
  padding: 18px 18px 18px 62px; position: relative;
}
.road__n {
  position: absolute; left: 18px; top: 18px;
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--ink); color: var(--amber);
  display: grid; place-items: center; font-weight: 800; font-size: .95rem;
}
.road p { color: var(--gray); font-size: .93rem; }

/* ---------- Отзывы ---------- */
.revs { display: grid; gap: 16px; }
.rev { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 22px; }
.rev blockquote { margin-bottom: 10px; }
.rev figcaption { color: var(--gray); font-size: .87rem; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 10px; }
.q { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 2px 18px; }
.q summary {
  cursor: pointer; font-weight: 700; padding: 15px 0; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
}
.q summary::-webkit-details-marker { display: none; }
.q summary::after { content: "+"; font-size: 1.4rem; color: var(--amber-d); flex: none; line-height: 1; }
.q[open] summary::after { content: "–"; }
.a { padding: 0 0 15px; color: var(--gray); }

/* ---------- Контакты и форма ---------- */
.cnt { display: grid; gap: 26px; }
.cnt h3 { margin: 16px 0 4px; }
.cnt h3:first-child { margin-top: 0; }
.cnt__btns { display: flex; flex-direction: column; gap: 10px; margin-top: 18px; }

.form { background: #fff; border: 1px solid var(--line); border-radius: var(--r); padding: 24px; box-shadow: var(--sh); }
.form__hint { color: var(--gray); font-size: .9rem; margin: 6px 0 16px; }
.form label { display: block; margin-bottom: 14px; }
.form label span { display: block; font-size: .88rem; font-weight: 700; margin-bottom: 6px; }
.form input, .form textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 9px;
  padding: 12px 14px; font: inherit; font-size: 1rem; color: var(--ink); background: #fff;
}
.form input:focus, .form textarea:focus { border-color: var(--amber); outline: none; box-shadow: 0 0 0 3px var(--amber-soft); }
.form input.bad, .form textarea.bad { border-color: #dc2626; box-shadow: 0 0 0 3px #fee2e2; }
.status { margin-top: 12px; font-size: .94rem; font-weight: 700; min-height: 1.2em; }
.status.ok { color: var(--wa-d); }
.status.err { color: #dc2626; }
.form__priv { margin-top: 12px; font-size: .79rem; color: var(--gray); }

/* ---------- Финал и подвал ---------- */
.final { background: var(--ink); color: #fff; padding: 54px 0; text-align: center; }
.final h2 { color: #fff; }
.final p { color: #d6d3d1; margin: 8px auto 24px; max-width: 54ch; }

.ftr { background: #0c0a09; color: #a8a29e; padding: 26px 0; font-size: .9rem; }
.ftr__mini { color: #78716c; font-size: .8rem; margin-top: 6px; }

/* ---------- Липкая панель на телефоне ---------- */
.bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
  display: flex; gap: 8px; padding: 8px;
  background: rgba(255, 255, 255, .96); border-top: 1px solid var(--line);
  backdrop-filter: blur(6px);
}
.bar__b {
  flex: 1; text-align: center; padding: 13px 8px; border-radius: 10px;
  text-decoration: none; font-weight: 700; background: #f5f5f4; color: var(--ink);
}
.bar__b--wa { background: var(--wa); color: #06331d; }

/* ============================================================
   Планшет / десктоп
   ============================================================ */
@media (min-width: 700px) {
  .tiers { grid-template-columns: repeat(3, 1fr); }
  .chips { grid-template-columns: repeat(2, 1fr); }
  .gal { grid-template-columns: repeat(2, 1fr); }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .road { grid-template-columns: repeat(2, 1fr); }
  .revs { grid-template-columns: repeat(3, 1fr); }
  .cnt { grid-template-columns: 1fr 1fr; align-items: start; }
  .calc__wrap { grid-template-columns: 1fr 1fr; align-items: center; gap: 40px; }
}

@media (min-width: 980px) {
  .sec { padding: 76px 0; }
  .menu { display: flex; margin-left: auto; }
  .hdr__act { margin-left: 18px; }
  .hdr__act .b--wa { display: inline-flex; }
  .burger { display: none; }

  .hero { padding: 58px 0 66px; }
  .hero__in { grid-template-columns: 1.08fr .92fr; align-items: center; gap: 44px; }

  .chips { grid-template-columns: repeat(3, 1fr); }
  .gal { grid-template-columns: repeat(3, 1fr); }
  .cards { grid-template-columns: repeat(3, 1fr); }
  .road { grid-template-columns: repeat(3, 1fr); }

  .bar { display: none; }
  body { padding-bottom: 0; }
}