/* NIKA Premium 1.8.0 — требования ТЗ НИКА4 */
:root {
  --nika4-ink: #263741;
  --nika4-muted: #667680;
  --nika4-paper: #fff;
  --nika4-soft: #f1f5f7;
  --nika4-line: #d8e1e6;
  --nika4-accent: #e85d2a;
  --nika4-accent-dark: #c9471b;
}

/* Прямые, уверенные CTA без декоративных скруглений. */
.button,
.button-small,
.karkas-mobile-cta,
.project-reveal__toggle,
.filters button,
.articles-hero nav a,
.header-services__panel,
.header-services__panel a,
.nika-lead-form button,
.back-to-top,
button[type="submit"] { border-radius: 0 !important; }

.button,
.button-small,
.nika-lead-form button,
.karkas-mobile-cta {
  min-height: 52px;
  padding-inline: 26px;
  letter-spacing: .11em;
}

.header-services__panel { border-top-width: 3px !important; }

/* Светлые баннеры услуг с читаемым графитовым текстом. */
.karkas-hero { min-height: 690px; color: var(--nika4-ink) !important; background: #e8eef1; }
.karkas-hero__image { filter: saturate(.78) brightness(1.12) contrast(.9); }
.karkas-hero__shade {
  background:
    linear-gradient(90deg,rgba(247,250,251,.97) 0%,rgba(247,250,251,.91) 42%,rgba(247,250,251,.48) 71%,rgba(247,250,251,.18) 100%),
    linear-gradient(0deg,rgba(226,234,238,.78),rgba(255,255,255,.06) 55%) !important;
}
.karkas-hero__content,
.karkas-hero h1,
.karkas-hero h1 em,
.karkas-hero__lead,
.karkas-breadcrumbs,
.karkas-breadcrumbs a,
.karkas-text-link { color: var(--nika4-ink) !important; }
.karkas-hero h1 em { color: var(--nika4-accent) !important; }
.karkas-hero__lead { max-width: 700px; }
.karkas-hero .eyebrow { color: var(--nika4-accent) !important; }
.karkas-hero__facts {
  background: rgba(255,255,255,.74) !important;
  border-color: rgba(94,115,127,.24) !important;
  backdrop-filter: blur(8px);
}
.karkas-hero__facts li,
.karkas-hero__facts b,
.karkas-hero__facts span { color: var(--nika4-ink) !important; }
.karkas-text-link { border-color: var(--nika4-accent) !important; }

/* Служебные подписи не выводятся на публичной части. */
.karkas-visual-note,
.home-visual-note,
.karkas-project-legal,
.home-legal,
.catalog-disclaimer { display: none !important; }

/* Интерактив планировки — только по осознанному клику. */
.project-reveal:hover > .project-reveal__plan,
.project-reveal:focus-within > .project-reveal__plan {
  max-height: 0;
  opacity: 0;
  transform: translateY(-14px);
  border-color: transparent;
}
.project-reveal.is-open > .project-reveal__plan {
  max-height: 520px;
  opacity: 1;
  transform: translateY(0);
  border-color: var(--nika4-line);
}
.project-reveal__toggle {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 16px;
  color: #fff !important;
  background: var(--nika4-accent) !important;
  border: 1px solid var(--nika4-accent) !important;
}
.project-reveal__toggle:hover,
.project-reveal__toggle:focus-visible { background: var(--nika4-accent-dark) !important; }

/* Встроенные формы с отдельными вопросами по направлениям. */
.nika-lead-form {
  width: 100%;
  display: grid !important;
  grid-template-columns: repeat(2,minmax(0,1fr)) !important;
  gap: 20px !important;
  padding: clamp(26px,4vw,42px) !important;
  color: var(--nika4-ink);
  background: #fff !important;
  border: 1px solid var(--nika4-line) !important;
  border-top: 4px solid var(--nika4-accent) !important;
  box-shadow: 0 24px 65px rgba(38,55,65,.1) !important;
}
.nika-form-head,
.nika-form-comment,
.nika-lead-form .consent,
.nika-lead-form button,
.nika-lead-form .nika-form-status { grid-column: 1 / -1 !important; }
.nika-form-head { margin-bottom: 4px; }
.nika-form-head span { color: var(--nika4-accent); font-size: 9px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.nika-form-head h3 { margin: 9px 0 8px; color: var(--nika4-ink); font: 400 clamp(26px,3vw,34px)/1.08 Georgia,serif; letter-spacing: -.025em; }
.nika-form-head p { margin: 0; color: var(--nika4-muted); font: 14px/1.6 Georgia,serif; }
.nika-lead-form label {
  width: 100%;
  min-width: 0;
  display: flex !important;
  flex-direction: column;
  gap: 8px;
  color: #53646e;
  font: 800 9px/1.35 Arial,sans-serif;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.nika-lead-form input:not([type="checkbox"]),
.nika-lead-form select,
.nika-lead-form textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid #c7d2d8 !important;
  border-radius: 0 !important;
  color: var(--nika4-ink);
  background: #fff;
  box-shadow: none;
  outline: none;
  font: 400 15px/1.4 Arial,sans-serif;
  letter-spacing: 0;
  text-transform: none;
}
.nika-lead-form input:not([type="checkbox"]),
.nika-lead-form select { height: 55px; padding: 0 15px; }
.nika-lead-form textarea { min-height: 104px; padding: 15px; resize: vertical; }
.nika-lead-form input:focus,
.nika-lead-form select:focus,
.nika-lead-form textarea:focus { border-color: var(--nika4-accent) !important; box-shadow: 0 0 0 3px rgba(232,93,42,.12); }
.nika-lead-form .consent {
  display: grid !important;
  grid-template-columns: 20px minmax(0,1fr);
  align-items: start;
  gap: 11px;
  color: var(--nika4-muted);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0;
  text-transform: none;
}
.nika-lead-form .consent input { width: 19px; height: 19px; margin: 0; accent-color: var(--nika4-accent); }
.nika-lead-form .consent a { color: var(--nika4-ink); text-decoration: underline; text-underline-offset: 3px; }
.nika-lead-form button {
  width: 100%;
  min-height: 58px;
  border: 0;
  color: #fff;
  background: var(--nika4-accent);
  box-shadow: 0 13px 30px rgba(144,55,23,.18);
  cursor: pointer;
  font: 800 10px/1 Arial,sans-serif;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.nika-lead-form button:hover { background: var(--nika4-accent-dark); }
.nika-lead-form button:disabled { cursor: wait; opacity: .66; }
.nika-hp { position: absolute !important; left: -9999px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.nika-form-status { margin: 0; padding: 13px 15px; font: 14px/1.5 Georgia,serif; }
.nika-form-status:empty { display: none; }
.nika-form-status.success { color: #315b43; background: #edf5ef; }
.nika-form-status.error { color: #873a31; background: #f9eeec; }

/* Структурированные превью статей. */
.articles-previews { padding-top: 76px; padding-bottom: 76px; }
.articles-previews__head { max-width: 820px; margin-bottom: 38px; }
.articles-preview-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 22px; }
.article-preview-card { display: flex; min-width: 0; flex-direction: column; background: #fff; border: 1px solid var(--nika4-line); transition: transform .25s,box-shadow .25s; }
.article-preview-card:hover { transform: translateY(-5px); box-shadow: 0 24px 58px rgba(38,55,65,.1); }
.article-preview-card img { width: 100%; aspect-ratio: 3/2; object-fit: cover; }
.article-preview-card > div { display: flex; flex: 1; flex-direction: column; padding: 24px; }
.article-preview-card span { color: var(--nika4-accent); font-size: 9px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.article-preview-card h3 { margin: 13px 0 12px; font-size: 24px; line-height: 1.16; }
.article-preview-card p { margin: 0 0 22px; color: var(--nika4-muted); font: 14px/1.62 Georgia,serif; }
.article-preview-card b { display: flex; justify-content: space-between; margin-top: auto; padding-top: 16px; border-top: 1px solid var(--nika4-line); font-size: 9px; letter-spacing: .1em; text-transform: uppercase; }
.article-preview-card b i { color: var(--nika4-accent); font-size: 16px; font-style: normal; }
.seo-article__actions { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; margin-top: 20px; }
.article-consult-link { color: var(--nika4-accent); font-size: 10px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }

/* Выполненные работы: единый карточный язык главной страницы. */
.nika-works { padding: clamp(62px,7vw,92px) 0; background: #fff; border-bottom: 1px solid var(--nika4-line); }
.nika-works__grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 22px; }
.nika-works__grid article { min-width: 0; background: #fff; border: 1px solid var(--nika4-line); box-shadow: 0 14px 38px rgba(38,55,65,.06); transition: transform .25s,box-shadow .25s; }
.nika-works__grid article:hover { transform: translateY(-5px); box-shadow: 0 26px 68px rgba(38,55,65,.11); }
.nika-works__grid img { display: block; width: 100%; aspect-ratio: 3/2; object-fit: cover; }
.nika-works__grid article > div { padding: 24px; }
.nika-works__grid span { color: var(--nika4-accent); font-size: 9px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.nika-works__grid h3 { margin: 10px 0 8px; color: var(--nika4-ink); font-size: 28px; line-height: 1.08; }
.nika-works__grid b { display: block; color: var(--nika4-ink); font: 400 15px/1.45 Georgia,serif; }
.nika-works__grid p { margin: 16px 0 0; padding-top: 16px; color: var(--nika4-muted); border-top: 1px solid var(--nika4-line); font: 14px/1.62 Georgia,serif; }
.unified-card,
.foundation-card,
.roofing-card,
.karkas-project-card { border-color: var(--nika4-line) !important; background: #fff !important; box-shadow: 0 14px 38px rgba(38,55,65,.06); }

/* Кнопка наверх на всех страницах. */
.back-to-top {
  position: fixed;
  z-index: 85;
  right: max(16px,calc((100vw - 1280px)/2));
  bottom: 24px;
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  padding: 5px;
  border: 1px solid #cdd7dc;
  color: var(--nika4-ink);
  background: rgba(255,255,255,.94);
  box-shadow: 0 16px 38px rgba(38,55,65,.14);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .2s,transform .2s,visibility .2s,background .2s;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { color: #fff; background: var(--nika4-accent); border-color: var(--nika4-accent); }
.back-to-top span { font-size: 20px; line-height: 1; }
.back-to-top small { font-size: 7px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }

/* Дизайнерская 404 в общей светлой системе. */
.not-found { background: #fff; }
.not-found__hero { overflow: hidden; padding: clamp(72px,9vw,130px) 0; background: linear-gradient(135deg,#eef3f5 0%,#fff 70%); border-bottom: 1px solid var(--nika4-line); }
.not-found__grid { display: grid; grid-template-columns: 1fr .9fr; gap: clamp(48px,8vw,120px); align-items: center; }
.not-found h1 { margin: 18px 0 26px; color: var(--nika4-ink); font: 400 clamp(48px,6.8vw,86px)/.98 Georgia,serif; letter-spacing: -.05em; }
.not-found h1 em { color: var(--nika4-accent); font-weight: 400; }
.not-found__grid > div:first-child > p:not(.section-kicker) { max-width: 680px; color: var(--nika4-muted); font: 18px/1.7 Georgia,serif; }
.not-found__illustration { position: relative; min-height: 430px; border: 1px solid #ccd7dc; background: linear-gradient(#dce9ee 0 58%,#c9d2d0 58% 61%,#e9edef 61%); box-shadow: 0 28px 70px rgba(38,55,65,.1); }
.not-found__illustration > strong { position: absolute; right: 24px; top: 20px; color: rgba(38,55,65,.12); font: 800 96px/1 Arial,sans-serif; }
.not-found__sun { position: absolute; top: 48px; left: 50px; width: 76px; height: 76px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 18px rgba(255,255,255,.28); }
.not-found__crane { position: absolute; left: 46px; bottom: 92px; width: 210px; height: 250px; border-left: 8px solid var(--nika4-ink); }
.not-found__crane::before { content: ''; position: absolute; left: -8px; top: 0; width: 240px; border-top: 8px solid var(--nika4-ink); }
.not-found__crane::after { content: ''; position: absolute; left: 150px; top: 8px; height: 105px; border-left: 2px solid var(--nika4-accent); }
.not-found__crane i { position: absolute; left: 126px; top: 106px; width: 48px; height: 23px; border: 3px solid var(--nika4-accent); }
.not-found__crane b { position: absolute; left: -34px; bottom: -10px; width: 76px; height: 18px; background: var(--nika4-ink); }
.not-found__house { position: absolute; right: 34px; bottom: 88px; width: 230px; height: 145px; background: #fff; border: 6px solid var(--nika4-ink); }
.not-found__house::before { content: ''; position: absolute; left: -16px; top: -80px; width: 170px; height: 170px; border-top: 7px solid var(--nika4-accent); border-left: 7px solid var(--nika4-accent); transform: rotate(45deg); }
.not-found__house span { position: absolute; left: 34px; bottom: 0; width: 64px; height: 85px; background: #e6ecef; border: 5px solid var(--nika4-ink); }
.not-found__house i { position: absolute; right: 28px; top: 46px; width: 62px; height: 48px; border: 5px solid var(--nika4-ink); }
.not-found__links { padding-top: 56px; padding-bottom: 70px; }
.not-found__links > p { color: var(--nika4-muted); }
.not-found__links nav { display: grid; grid-template-columns: repeat(4,1fr); margin-top: 22px; border-top: 1px solid var(--nika4-line); border-left: 1px solid var(--nika4-line); }
.not-found__links a { min-height: 96px; display: flex; align-items: center; padding: 20px; border-right: 1px solid var(--nika4-line); border-bottom: 1px solid var(--nika4-line); font-weight: 700; }
.not-found__links a:hover { color: var(--nika4-accent); background: var(--nika4-soft); }

@media (max-width: 1000px) {
  .karkas-hero { min-height: 640px; }
  .articles-preview-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .nika-works__grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .not-found__grid { grid-template-columns: 1fr; }
  .not-found__illustration { min-height: 380px; }
  .not-found__links nav { grid-template-columns: repeat(2,1fr); }
}

@media (max-width: 680px) {
  .karkas-hero { min-height: 660px; }
  .karkas-hero__shade { background: linear-gradient(180deg,rgba(247,250,251,.97) 0%,rgba(247,250,251,.86) 72%,rgba(231,238,241,.8) 100%) !important; }
  .karkas-hero__facts { background: rgba(255,255,255,.68) !important; }
  .nika-lead-form { grid-template-columns: minmax(0,1fr) !important; padding: 26px 20px !important; }
  .nika-lead-form > *,
  .nika-form-head,
  .nika-form-comment,
  .nika-lead-form .consent,
  .nika-lead-form button,
  .nika-lead-form .nika-form-status { grid-column: 1 !important; }
  .articles-preview-grid { grid-template-columns: 1fr; }
  .nika-works__grid { grid-template-columns: 1fr; }
  .seo-article__actions { align-items: stretch; flex-direction: column; }
  .article-consult-link { padding: 12px 0; text-align: center; }
  .back-to-top { right: 12px; bottom: 78px; width: 52px; height: 52px; }
  .not-found__hero { padding: 60px 0; }
  .not-found__illustration { min-height: 310px; }
  .not-found__crane { left: 28px; bottom: 62px; transform: scale(.78); transform-origin: left bottom; }
  .not-found__house { right: 18px; bottom: 60px; transform: scale(.72); transform-origin: right bottom; }
  .not-found__illustration > strong { font-size: 68px; }
  .not-found__links nav { grid-template-columns: 1fr; }
}

@media (max-width: 380px) {
  .shell { width: min(100% - 26px,1180px); }
  .nika-lead-form { padding: 23px 16px !important; }
  .not-found h1 { font-size: 42px; }
  .not-found__illustration { min-height: 280px; }
  .not-found__crane { left: 14px; transform: scale(.66); }
  .not-found__house { transform: scale(.62); }
}

@media (prefers-reduced-motion: reduce) {
  .back-to-top,
  .article-preview-card { transition: none !important; }
}