/* ООО «Кооперация» — генподрядчик, Севастополь.
   Дизайн-система: «инженерный документ». См. DESIGN_PLAN.md */

:root {
  --graphite: #262A30;
  --paper: #FFFFFF;
  --concrete: #EDEFF2;
  --steel: #5D6670;
  --accent: #2C4F72;
  --accent-soft: #7EA6CE;
  --brick: #A44A2E;
  --brick-soft: #D08A66;
  --line: rgba(38, 42, 48, .18);
  --line-strong: rgba(38, 42, 48, .4);
  --line-dark: rgba(255, 255, 255, .18);
  --ink-soft: #3A4048;
  --ink-dark: #C8CFD6;
  --wrap: 1200px;
  --font-head: "Bitter", Georgia, serif;
  --font-body: "Golos Text", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font: 400 1rem/1.65 var(--font-body);
  color: var(--graphite);
  background: var(--paper);
  -webkit-text-size-adjust: 100%;
}

p { margin: 0 0 1em; overflow-wrap: break-word; }
a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: #1F3C59; }
img, svg { max-width: 100%; }
h1, h2, h3 { overflow-wrap: break-word; }

::selection { background: var(--accent); color: #fff; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.sec-dark :focus-visible,
.hero :focus-visible {
  outline-color: var(--accent-soft);
}

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

section[id] { scroll-margin-top: 84px; }

/* ---------- скип-ссылка ---------- */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--paper);
  color: var(--graphite);
  border: 1px solid var(--graphite);
  padding: 10px 16px;
  font-weight: 500;
  text-decoration: none;
}
.skip:focus { left: 16px; top: 12px; }

/* ---------- шапка ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.head-in {
  position: relative;
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  margin-right: auto;
  padding-block: 12px;
}
.brand-mark {
  width: 38px;
  height: 38px;
  flex: 0 0 auto;
  display: grid;
  place-content: center;
  background: var(--graphite);
  color: #fff;
  font: 600 1.2rem/1 var(--font-head);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.brand-name {
  font: 600 1.06rem/1.2 var(--font-head);
  letter-spacing: .02em;
  text-transform: uppercase;
}
.brand-sub {
  font-size: .74rem;
  color: var(--steel);
}
.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list a {
  font-weight: 500;
  font-size: .95rem;
  color: var(--graphite);
  text-decoration: none;
}
.nav-list a:hover { color: var(--accent); text-decoration: underline; text-underline-offset: 5px; }
.nav-cta {
  display: inline-block;
  border: 1px solid var(--graphite);
  color: var(--graphite);
  font-weight: 600;
  font-size: .92rem;
  padding: 9px 16px;
  text-decoration: none;
  transition: background .2s, color .2s;
}
.nav-cta:hover { background: var(--graphite); color: #fff; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.nav-toggle {
  display: none;
  border: 1px solid var(--graphite);
  background: transparent;
  color: var(--graphite);
  font: 600 .88rem var(--font-body);
  padding: 9px 14px;
  cursor: pointer;
}

/* ---------- кнопки ---------- */
.btn {
  display: inline-block;
  font: 600 .98rem var(--font-body);
  padding: 14px 26px;
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: background .2s, color .2s, border-color .2s;
}
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:hover { background: #1F3C59; color: #fff; }
.btn-ghost {
  border-color: rgba(255, 255, 255, .45);
  color: #fff;
}
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, .07); color: #fff; }
.btn-paper { background: #fff; color: var(--graphite); border-color: #fff; }
.btn-paper:hover { background: #D9E0E8; }

/* ---------- hero ---------- */
.hero {
  background:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px),
    var(--graphite);
  background-size: 44px 44px, 44px 44px, auto;
  color: #fff;
  border-bottom: 1px solid var(--line-dark);
  padding: clamp(56px, 8vw, 96px) 0 clamp(64px, 9vw, 104px);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 10fr) minmax(0, 9fr);
  gap: clamp(36px, 5vw, 64px);
  align-items: center;
}
.hero h1 {
  font: 600 clamp(2.05rem, 1.25rem + 3.2vw, 3.35rem) / 1.14 var(--font-head);
  letter-spacing: -.015em;
  margin: 0 0 20px;
}
.hero-sub {
  color: #C3CAD1;
  max-width: 46ch;
  margin: 0 0 34px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.hero-art { margin: 0; min-width: 0; }
.hero-art svg {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  margin-inline: auto;
}
.hero-art text {
  font-family: var(--font-body);
  font-size: 11px;
  fill: #8E99A6;
}
.hero-art .t { opacity: 1; }

/* единственная незапрашиваемая анимация — отрисовка чертежа */
html.js .hero-art .draw {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: draw-stroke .9s ease-out forwards;
}
html.js .hero-art .t { opacity: 0; animation: fade-in .7s ease forwards; }
html.js .g-crane .draw { animation-delay: .15s; }
html.js .g-bld .draw { animation-delay: .55s; }
html.js .g-ground .draw { animation-delay: .9s; }
html.js .g-dim .draw { animation-delay: 1.15s; }
html.js .g-txt .t { animation-delay: 1.35s; }
html.js .g-mark .t { animation-delay: 1.5s; }
@keyframes draw-stroke { to { stroke-dashoffset: 0; } }
@keyframes fade-in { to { opacity: 1; } }

/* ---------- секции ---------- */
.sec { padding: clamp(64px, 9vw, 104px) 0; }
.sec-alt { background: var(--concrete); }
.sec-dark { background: var(--graphite); color: #E6EAEE; }

.sec-head {
  position: relative;
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
  margin-bottom: clamp(36px, 5vw, 56px);
}
.sec-dark .sec-head { border-color: var(--line-dark); }
.sec-head::before,
.sec-head::after {
  content: "";
  position: absolute;
  bottom: -5px;
  width: 1px;
  height: 11px;
  background: var(--line-strong);
}
.sec-head::before { left: 0; }
.sec-head::after { right: 0; }
.sec-head h2 {
  font: 600 clamp(1.55rem, 1.15rem + 1.9vw, 2.25rem) / 1.2 var(--font-head);
  letter-spacing: -.01em;
  margin: 0;
}
.muted { color: var(--steel); }

/* ---------- о компании ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}
.about-text p { max-width: 62ch; }
.facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0;
  border-top: 1px solid var(--line);
}
.fact { padding: 20px 0 22px; border-bottom: 1px solid var(--line); min-width: 0; }
.fact:nth-child(odd) { padding-right: 24px; }
.fact:nth-child(even) { padding-left: 24px; border-left: 1px solid var(--line); }
.fact dt {
  font: 600 1.9rem / 1.1 var(--font-head);
  letter-spacing: -.01em;
}
.fact dd {
  margin: 6px 0 0;
  color: var(--steel);
  font-size: .92rem;
}

/* ---------- услуги (ведомость) ---------- */
.svc { border-top: 1px solid var(--line); }
.svc:last-child { border-bottom: 1px solid var(--line); }
.svc {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 8px 28px;
  padding: 30px 0 32px;
  transition: background .2s;
}
.svc:hover { background: #E4E8EC; }
.svc h3 {
  font: 600 1.32rem / 1.25 var(--font-head);
  margin: 4px 0 0;
}
.svc-body p { margin: 0 0 .7em; max-width: 64ch; }
.svc-works { color: var(--steel); font-size: .92rem; margin: 0; }

/* ---------- преимущества (лента) ---------- */
.adv-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.adv { padding: 4px 28px 4px 26px; border-left: 1px solid var(--line); min-width: 0; }
.adv:first-child { padding-left: 0; border-left: none; }
.adv h3 {
  font: 600 1.18rem / 1.3 var(--font-head);
  margin: 0 0 10px;
}
.adv p { margin: 0; color: var(--ink-soft); font-size: .95rem; }

/* ---------- объекты (мозаика) ---------- */
.obj-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
}
.obj {
  background: var(--paper);
  border: 1px solid var(--line);
  min-width: 0;
  transition: background .25s, border-color .25s;
}
.obj:nth-child(1) { grid-column: 1 / 8; }
.obj:nth-child(2) { grid-column: 8 / 13; }
.obj:nth-child(3) { grid-column: 1 / 6; }
.obj:nth-child(4) { grid-column: 6 / 13; }
.obj-art {
  padding: 26px 26px 20px;
  color: #454C55;
  border-bottom: 1px solid var(--line);
  transition: color .25s, border-color .25s;
}
.obj-art svg { display: block; width: 100%; height: auto; }
.obj-meta { padding: 18px 24px 22px; }
.obj-meta h3 {
  font: 600 1.12rem / 1.3 var(--font-head);
  margin: 0 0 8px;
  transition: color .25s;
}
.obj-line, .obj-role {
  margin: 0;
  font-size: .9rem;
  color: var(--steel);
  transition: color .25s;
}
.obj-role { margin-top: 4px; font-size: .84rem; }
.obj:hover, .obj:focus-within {
  background: var(--graphite);
  border-color: var(--graphite);
}
.obj:hover .obj-art, .obj:focus-within .obj-art {
  color: #9AA6B2;
  border-color: var(--line-dark);
}
.obj:hover .obj-meta h3, .obj:focus-within .obj-meta h3 { color: #fff; }
.obj:hover .obj-line,
.obj:hover .obj-role,
.obj:focus-within .obj-line,
.obj:focus-within .obj-role { color: #A7B0BA; }

/* ---------- контакты ---------- */
.contacts-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}
.c-lead { color: var(--ink-dark); max-width: 46ch; }
.c-item { padding: 18px 0; border-top: 1px solid var(--line-dark); }
.c-label {
  margin: 0 0 6px;
  font-size: .82rem;
  color: #98A3AE;
}
.c-val { margin: 0; font-size: 1.02rem; color: #F2F4F6; }
.c-val a { color: var(--accent-soft); }
.c-val a:hover { color: #A9C4DE; }

.form-title {
  font: 600 1.3rem / 1.25 var(--font-head);
  color: #fff;
  margin: 0 0 22px;
}
.field { margin-bottom: 18px; }
.field > label {
  display: block;
  margin-bottom: 8px;
  font-size: .9rem;
  color: #D5DAE0;
}
.field input[type="text"],
.field input[type="tel"],
.field textarea {
  width: 100%;
  padding: 12px 14px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .28);
  color: #fff;
  font: 400 .95rem / 1.5 var(--font-body);
  border-radius: 0;
  transition: border-color .2s, box-shadow .2s;
}
.field textarea { resize: vertical; min-height: 96px; }
.field input::placeholder, .field textarea::placeholder { color: rgba(255, 255, 255, .38); }
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent-soft);
  box-shadow: 0 0 0 1px var(--accent-soft);
}
.req { color: var(--brick-soft); }
.field-err {
  display: none;
  margin: 6px 0 0;
  font-size: .82rem;
  color: #E39A82;
}
.field.invalid .field-err { display: block; }
.field.invalid input[type="text"],
.field.invalid input[type="tel"] { border-color: var(--brick-soft); }
.field-consent { display: grid; grid-template-columns: auto 1fr; gap: 10px; align-items: start; }
.field-consent label {
  margin: 0;
  font-size: .85rem;
  color: var(--ink-dark);
  line-height: 1.45;
}
.field-consent .field-err { grid-column: 1 / -1; }
.field-consent input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  border: 1px solid rgba(255, 255, 255, .35);
  background: transparent;
  display: inline-grid;
  place-content: center;
  cursor: pointer;
}
.field-consent input[type="checkbox"]::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--accent-soft);
  transform: scale(0);
  transition: transform .15s;
}
.field-consent input[type="checkbox"]:checked::before { transform: scale(1); }
.field-consent input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--accent-soft);
  outline-offset: 2px;
}
.form-ok { border: 1px solid rgba(255, 255, 255, .25); padding: 24px 26px; }
.form-ok-title {
  font: 600 1.15rem var(--font-head);
  color: #fff;
  margin: 0 0 8px;
}
.form-ok p { margin: 0; color: var(--ink-dark); }
.form-ok a { color: var(--accent-soft); }

/* ---------- футер: штамп ---------- */
.site-foot {
  background: var(--paper);
  padding: 52px 0 44px;
}
.foot-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 28px;
  margin-bottom: 28px;
  font-size: .92rem;
}
.foot-nav a { color: var(--steel); text-decoration: none; }
.foot-nav a:hover { color: var(--accent); text-decoration: underline; }
.foot-note { margin-left: auto; font-size: .8rem; color: var(--steel); }

.stamp {
  border: 2px solid var(--graphite);
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
}
.stamp-cell {
  padding: 14px 18px 16px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  min-width: 0;
}
.stamp-cell p { margin: 0; overflow-wrap: break-word; }
.stamp-label { font-size: .72rem; color: var(--steel); margin-bottom: 4px !important; }
.stamp-val { font-weight: 600; font-size: .98rem; }
.sc-brand {
  grid-row: 1 / 3;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: none;
}
.stamp-name {
  font: 600 1.25rem / 1.2 var(--font-head);
  text-transform: uppercase;
  letter-spacing: .02em;
  margin-bottom: 6px !important;
}
.stamp-desc { font-size: .85rem; color: var(--steel); }
.sc-addr { grid-column: 2 / 4; }
.sc-bottom {
  grid-column: 1 / 4;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 28px;
  font-size: .84rem;
  color: var(--steel);
  border-right: none;
  border-bottom: none;
}

/* ---------- адаптив ---------- */
@media (max-width: 1020px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 640px; }
  .hero-art svg { margin: 0; }
  .about-grid { grid-template-columns: 1fr; }
  .facts { max-width: 560px; }
  .contacts-grid { grid-template-columns: 1fr; gap: 44px; }
  .obj:nth-child(n) { grid-column: auto / span 6; }
}

@media (max-width: 920px) {
  .nav-toggle { display: inline-flex; }
  html.js .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 18px clamp(18px, 4vw, 40px) 22px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
  html.js .site-nav.open { display: flex; }
  .nav-list { flex-direction: column; gap: 12px; }
}

@media (max-width: 760px) {
  .svc { grid-template-columns: 1fr; gap: 10px; padding: 26px 0 28px; }
  .adv-strip { grid-template-columns: 1fr; }
  .adv { border-left: none; border-top: 1px solid var(--line); padding: 20px 0 18px; }
  .adv:first-child { border-top: none; padding-top: 0; }
  .obj:nth-child(n) { grid-column: 1 / -1; }
  .foot-note { margin-left: 0; }
  .stamp { display: block; }
  .stamp-cell { border-right: none; border-bottom: none; border-top: 1px solid var(--line-strong); }
  .sc-brand { border-top: none; }
}

@media (max-width: 480px) {
  .facts { grid-template-columns: 1fr; }
  .fact:nth-child(even) { padding-left: 0; border-left: none; }
  .fact:nth-child(odd) { padding-right: 0; }
  .hero-actions .btn { width: 100%; text-align: center; }
}

/* ---------- доступная анимация ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  html.js .hero-art .draw { stroke-dashoffset: 0; }
  html.js .hero-art .t { opacity: 1; }
}