/* ============================================================
   GIGASOFT.KZ — «инженерный чертёж» (blueprint)
   цианотипия / миллиметровка / выноски / ГОСТ-штамп
   ============================================================ */

:root {
  --blue-deep: #0A2A52;
  --blue-line: rgba(214, 232, 255, 0.10);
  --blue-line-strong: rgba(214, 232, 255, 0.35);
  --ink: #E9F2FF;
  --ink-dim: #A8BEDD;
  --marker: #FFD24A;
  --marker-ink: #1A2233;
  --frame: rgba(214, 232, 255, 0.55);
  --header-h: 64px;
  --frame-pad: 14px;

  --font-display: "Tektur", sans-serif;
  --font-body: "Golos Text", sans-serif;
  --font-mono: "PT Mono", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background-color: var(--blue-deep);
  background-image:
    linear-gradient(to right, var(--blue-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--blue-line) 1px, transparent 1px),
    linear-gradient(to right, rgba(214,232,255,0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(214,232,255,0.045) 1px, transparent 1px);
  background-size: 120px 120px, 120px 120px, 24px 24px, 24px 24px;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--marker); color: var(--marker-ink); }

.mono {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
}

a { color: inherit; }

/* ---------- рамка чертежа ---------- */
.sheet-frame {
  position: fixed;
  inset: var(--frame-pad);
  border: 1px solid var(--frame);
  outline: 1px solid var(--frame);
  outline-offset: 3px;
  pointer-events: none;
  z-index: 90;
}

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============================================================
   ШАПКА
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 42, 82, 0.92);
  backdrop-filter: blur(4px);
  border-bottom: 1px solid var(--blue-line-strong);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: var(--header-h);
  padding: 0 calc(var(--frame-pad) + 22px);
  max-width: 1440px;
  margin: 0 auto;
}

.logo {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  text-decoration: none;
}

.logo-tld { color: var(--marker); }

.doc-num {
  color: var(--ink-dim);
  border: 1px solid var(--blue-line-strong);
  padding: 4px 10px;
}

.site-nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-dim);
  transition: color 0.2s ease;
}

.site-nav a:hover { color: var(--marker); }

.header-cta {
  text-decoration: none;
  color: var(--marker);
  border: 1px dashed var(--marker);
  padding: 8px 14px;
  transition: background 0.2s ease, color 0.2s ease;
}

.header-cta:hover { background: var(--marker); color: var(--marker-ink); border-style: solid; }

.nav-toggle { display: none; }

/* ============================================================
   HERO
   ============================================================ */
.hero { padding-top: 64px; }

.hero-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 calc(var(--frame-pad) + 22px);
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 48px;
  align-items: center;
}

.callout {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--marker);
  margin-bottom: 30px;
}

.callout-line {
  width: 46px;
  height: 1px;
  background: var(--marker);
  position: relative;
  flex: none;
}

.callout-line::before {
  content: "";
  position: absolute;
  right: -3px; top: -2.5px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--marker);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 5.6vw, 84px);
  line-height: 1.04;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.hero-title em {
  font-style: normal;
  color: var(--marker);
  position: relative;
}

.hero-lead {
  max-width: 520px;
  margin-top: 30px;
  font-size: 1.1rem;
  color: var(--ink-dim);
}

.hero-cta-block {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.hero-cta-note { color: var(--ink-dim); }

.btn-stamp {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: var(--marker-ink);
  background: var(--marker);
  padding: 17px 34px;
  border: 1px solid var(--marker);
  box-shadow: 0 0 0 4px var(--blue-deep), 0 0 0 5px var(--marker);
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.btn-stamp:hover {
  background: transparent;
  color: var(--marker);
}

/* изометрический каркас */
.hero-iso { max-width: 420px; margin: 0 auto; }
.hero-iso svg { width: 100%; height: auto; }

.hero-iso .axis {
  stroke: var(--blue-line-strong);
  stroke-dasharray: 2 6;
}

.hero-iso .wire path {
  stroke: var(--ink);
  stroke-width: 1.5;
  fill: none;
}

.hero-iso .node circle {
  fill: var(--blue-deep);
  stroke: var(--marker);
  stroke-width: 2;
}

.hero-iso .dim line, .hero-iso .dim path {
  stroke: var(--marker);
  fill: var(--marker);
  stroke-width: 1;
}

.hero-iso .dim-label {
  fill: var(--marker);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

/* размерная линия-разделитель */
.dim-rule {
  max-width: 1440px;
  margin: 64px auto 0;
  padding: 0 calc(var(--frame-pad) + 22px);
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--ink-dim);
}

.dim-text { white-space: nowrap; }

.dim-arrow {
  flex: 1;
  height: 1px;
  background: var(--blue-line-strong);
  position: relative;
}

.dim-arrow.left::before, .dim-arrow.right::after {
  content: "";
  position: absolute;
  top: -3.5px;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
}

.dim-arrow.left::before { left: 0; border-right: 10px solid var(--blue-line-strong); }
.dim-arrow.right::after { right: 0; border-left: 10px solid var(--blue-line-strong); }

/* ============================================================
   СЕКЦИИ
   ============================================================ */
.section {
  max-width: 1440px;
  margin: 0 auto;
  padding: 84px calc(var(--frame-pad) + 22px) 0;
  scroll-margin-top: var(--header-h);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.4vw, 42px);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.section-sub { color: var(--ink-dim); }

/* ============================================================
   СПЕЦИФИКАЦИЯ (услуги)
   ============================================================ */
.spec-table { border: 1px solid var(--blue-line-strong); }

.spec-row {
  display: grid;
  grid-template-columns: 80px 130px 1fr;
  border-bottom: 1px solid var(--blue-line-strong);
  transition: background 0.2s ease;
}

.spec-row:last-child { border-bottom: none; }

.spec-row > * { padding: 22px 20px; }

.spec-row > span { border-right: 1px solid var(--blue-line-strong); }

.spec-head {
  color: var(--ink-dim);
  background: rgba(214, 232, 255, 0.04);
}

.spec-head span { padding: 10px 20px; }

article.spec-row:hover { background: rgba(255, 210, 74, 0.06); }

.spec-pos { color: var(--marker); font-size: 1rem; }
.spec-code { color: var(--ink-dim); }

.spec-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.spec-desc { color: var(--ink-dim); max-width: 640px; }

/* ============================================================
   ОБЪЕКТЫ (кейсы)
   ============================================================ */
.cases {
  border: 1px solid var(--blue-line-strong);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}

.case {
  padding: 26px 24px 24px;
  display: flex;
  flex-direction: column;
  transition: background 0.2s ease;
}

.case:nth-child(odd) { border-right: 1px solid var(--blue-line-strong); }
.case:nth-child(-n+2) { border-bottom: 1px solid var(--blue-line-strong); }

.case:hover { background: rgba(255, 210, 74, 0.06); }

.case-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.case-shot {
  display: block;
  margin-bottom: 20px;
  border: 1px solid var(--blue-line-strong);
}

.case-shot img {
  display: block;
  width: 100%;
  height: auto;
  opacity: 0.9;
  transition: opacity 0.25s ease;
}

.case:hover .case-shot img { opacity: 1; }

.case-num { color: var(--marker); }

.case-link {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px dashed var(--blue-line-strong);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.case-link:hover { color: var(--marker); border-color: var(--marker); }

.case-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.case-desc { color: var(--ink-dim); flex: 1; }

.case-meta {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px dashed var(--blue-line-strong);
  color: var(--ink-dim);
  font-size: 0.75rem;
}

/* ============================================================
   СТАДИИ (процесс)
   ============================================================ */
.stages {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  position: relative;
  padding-top: 8px;
}

.stages::before {
  content: "";
  position: absolute;
  top: 15px; left: 0; right: 0;
  height: 1px;
  background: var(--blue-line-strong);
}

.stage { position: relative; padding-top: 34px; }

.stage-mark {
  position: absolute;
  top: 8px; left: 0;
  width: 15px; height: 15px;
  background: var(--blue-deep);
  border: 2px solid var(--marker);
  transform: rotate(45deg);
}

.stage-num { color: var(--marker); display: block; margin-bottom: 10px; }

.stage-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.stage-desc { font-size: 0.95rem; color: var(--ink-dim); }

/* ============================================================
   ТЕХ. ТРЕБОВАНИЯ (принципы)
   ============================================================ */
.reqs {
  list-style: none;
  counter-reset: req;
  border-left: 1px solid var(--blue-line-strong);
  max-width: 900px;
}

.req {
  counter-increment: req;
  position: relative;
  padding: 16px 0 16px 64px;
  font-size: 0.95rem;
  line-height: 1.7;
}

.req::before {
  content: counter(req) ".";
  position: absolute;
  left: 22px; top: 16px;
  color: var(--marker);
}

.req b { color: var(--ink); }
.req { color: var(--ink-dim); }

/* ============================================================
   КОНТАКТ
   ============================================================ */
.contact {
  max-width: 1440px;
  margin: 0 auto;
  padding: 110px calc(var(--frame-pad) + 22px) 90px;
  text-align: center;
}

.contact .callout { justify-content: center; }

.contact-mail {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 6vw, 88px);
  text-decoration: none;
  line-height: 1.15;
  padding: 0 0.18em;
  background: linear-gradient(to top, rgba(255, 210, 74, 0.45) 34%, transparent 34%);
  transition: background 0.25s ease, color 0.25s ease;
}

.contact-mail:hover {
  background: var(--marker);
  color: var(--marker-ink);
}

.contact-note { margin-top: 26px; color: var(--ink-dim); }

/* ============================================================
   ПОДВАЛ — штамп
   ============================================================ */
.site-footer {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 calc(var(--frame-pad) + 22px) calc(var(--frame-pad) + 26px);
}

.stamp {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--frame);
  outline: 1px solid var(--frame);
  outline-offset: 3px;
}

.stamp td {
  border: 1px solid var(--blue-line-strong);
  padding: 9px 14px;
  font-size: 0.78rem;
  color: var(--ink-dim);
  white-space: nowrap;
}

.stamp td:nth-child(odd) { background: rgba(214, 232, 255, 0.04); }

.stamp-brand {
  font-family: var(--font-display) !important;
  font-weight: 900;
  font-size: 1.15rem !important;
  color: var(--ink) !important;
  background: none !important;
  padding: 9px 22px !important;
}

.footer-copy {
  text-align: center;
  color: var(--ink-dim);
  padding: 18px 0 0;
  font-size: 0.75rem;
}

/* ============================================================
   АДАПТИВ
   ============================================================ */
@media (max-width: 1000px) {
  .doc-num { display: none; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-iso { max-width: 300px; }
  .stages { grid-template-columns: repeat(2, 1fr); row-gap: 44px; }
}

@media (max-width: 680px) {
  :root { --frame-pad: 8px; }

  .site-nav, .header-cta { display: none; }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    margin-left: auto;
  }

  .nav-toggle span {
    width: 26px; height: 2px;
    background: var(--ink);
    transition: transform 0.25s ease;
  }

  .nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

  .site-nav.open {
    display: flex;
    position: absolute;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--blue-deep);
    border-bottom: 1px solid var(--blue-line-strong);
  }

  .site-nav.open a {
    padding: 17px calc(var(--frame-pad) + 22px);
    border-top: 1px solid var(--blue-line);
    font-size: 1.02rem;
  }

  .hero { padding-top: 40px; }
  .hero-title { font-size: clamp(34px, 10vw, 48px); }

  .spec-row { grid-template-columns: 56px 1fr; }
  .spec-code { display: none; }
  .spec-head span:nth-child(2) { display: none; }

  .cases { grid-template-columns: 1fr; }
  .case:nth-child(odd) { border-right: none; }
  .case:not(:last-child) { border-bottom: 1px solid var(--blue-line-strong); }

  .stages { grid-template-columns: 1fr; }

  .req { padding-left: 46px; }
  .req::before { left: 14px; }

  .stamp td { white-space: normal; padding: 7px 8px; font-size: 0.68rem; }
  .stamp-brand { font-size: 0.95rem !important; padding: 7px 10px !important; }
}