/* ITB-Systems. Палітра виведена з фірмового логотипа компанії. */

:root {
  --ink: #001b38;
  --navy: #002d5b;
  --blue: #0072bc;
  --sky: #51b8e9;
  --paper: #f2f5f8;
  --white: #ffffff;
  --slate: #55677a;
  --line: #d7e0e8;
  --line-dark: rgba(255, 255, 255, .16);

  --font-display: "Unbounded", "Segoe UI", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "Courier New", monospace;

  --wrap: 1120px;
  --gap: clamp(56px, 8vw, 104px);
  --radius: 2px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 3px;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 24px;
}

.skip {
  position: absolute; left: -9999px;
  background: var(--ink); color: #fff; padding: 12px 18px; z-index: 200;
}
.skip:focus { left: 12px; top: 12px; }

/* ---------- Типографіка ---------- */

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -.02em;
  line-height: 1.12;
  margin: 0;
}

h1 { font-size: clamp(30px, 4.6vw, 54px); }
h2 { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: clamp(18px, 2vw, 21px); letter-spacing: -.01em; }

p { margin: 0 0 1.1em; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--blue);
  margin: 0 0 18px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.lead {
  font-size: clamp(17px, 1.7vw, 20px);
  color: var(--slate);
  max-width: 62ch;
}

/* ---------- Шапка ---------- */

.site-head {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.head-in {
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px; min-height: 72px;
}
.head-logo img { height: 34px; width: auto; }

.nav { display: flex; align-items: center; gap: 28px; }
.nav a {
  font-size: 15px; color: var(--ink); text-decoration: none;
  padding: 6px 0; border-bottom: 2px solid transparent;
}
.nav a:hover { border-bottom-color: var(--sky); text-decoration: none; }
.nav a[aria-current="page"] { border-bottom-color: var(--blue); }

.head-cta {
  font-family: var(--font-mono); font-size: 14px;
  color: var(--navy); white-space: nowrap;
}

.nav-toggle {
  display: none; background: none; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 9px 12px; cursor: pointer;
  font-family: var(--font-mono); font-size: 13px; color: var(--ink);
}

/* ---------- Hero ---------- */

.hero {
  background: var(--ink);
  color: var(--white);
  padding-block: clamp(56px, 8vw, 96px);
  background-image:
    linear-gradient(rgba(81, 184, 233, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(81, 184, 233, .06) 1px, transparent 1px);
  background-size: 56px 56px;
}
.hero h1 { color: var(--white); max-width: 17ch; }
.hero .eyebrow { color: var(--sky); }
.hero .eyebrow::after { background: var(--line-dark); }
.hero-lead { color: #b9cbdb; max-width: 54ch; margin-top: 22px; font-size: 18px; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }

/* Сигнатурний елемент: схема шарів інфраструктури */
.stack { display: flex; flex-direction: column; gap: 8px; }
.stack-cap {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em;
  text-transform: uppercase; color: #7f9ab3; margin-bottom: 6px;
}
.layer {
  display: grid;
  grid-template-columns: 40px 1fr;
  align-items: center;
  gap: 16px;
  padding: 14px 18px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--blue);
  border-radius: var(--radius);
  color: var(--white);
  text-decoration: none;
  transition: transform .22s ease, background .22s ease, border-left-color .22s ease;
  opacity: 0;
  transform: translateX(-14px);
  animation: layer-in .5s ease forwards;
}
.layer:hover, .layer:focus-visible {
  background: rgba(81, 184, 233, .12);
  border-left-color: var(--sky);
  transform: translateX(6px);
  text-decoration: none;
}
.layer-idx { font-family: var(--font-mono); font-size: 12px; color: var(--sky); }
.layer-name { display: block; font-size: 15px; font-weight: 500; }
.layer-desc { display: block; font-size: 13px; color: #9ab2c7; }

@keyframes layer-in { to { opacity: 1; transform: translateX(0); } }

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

/* ---------- Кнопки ---------- */

.btn {
  display: inline-block;
  font-family: var(--font-mono); font-size: 14px; letter-spacing: .02em;
  padding: 13px 24px; border-radius: var(--radius);
  border: 1px solid var(--blue); background: var(--blue); color: #fff;
  text-decoration: none; transition: background .18s ease, border-color .18s ease;
}
.btn:hover { background: #0060a0; border-color: #0060a0; text-decoration: none; }

.btn-ghost { background: transparent; color: var(--white); border-color: rgba(255,255,255,.35); }
.btn-ghost:hover { background: rgba(255,255,255,.08); border-color: var(--sky); }

.btn-dark { background: var(--navy); border-color: var(--navy); color: #fff; }
.btn-dark:hover { background: var(--ink); border-color: var(--ink); }

/* ---------- Секції ---------- */

.section { padding-block: var(--gap); }
.section-paper { background: var(--paper); }
.section-ink { background: var(--ink); color: var(--white); }
.section-ink h2, .section-ink h3 { color: var(--white); }
.section-ink .eyebrow { color: var(--sky); }
.section-ink .eyebrow::after { background: var(--line-dark); }
.section-ink p { color: #b9cbdb; }

.section-head { max-width: 68ch; margin-bottom: 44px; }

/* ---------- Послуги ---------- */

.svc-list { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.svc {
  display: grid;
  grid-template-columns: 84px 1fr auto;
  gap: 28px;
  align-items: baseline;
  padding: 30px 28px;
  background: var(--white);
  color: var(--ink);
  text-decoration: none;
  transition: background .18s ease;
}
.svc:hover { background: #eaf4fb; text-decoration: none; }
.svc-num { font-family: var(--font-mono); font-size: 13px; color: var(--blue); letter-spacing: .08em; }
.svc-title { display: block; font-family: var(--font-display); font-weight: 500; font-size: 20px; letter-spacing: -.01em; margin-bottom: 8px; }
.svc-short { display: block; font-size: 15px; color: var(--slate); margin: 0; max-width: 62ch; }
.svc-go { font-family: var(--font-mono); font-size: 13px; color: var(--blue); white-space: nowrap; }

/* ---------- Факти ---------- */

.facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.fact { background: var(--white); padding: 28px 24px; }
.fact-n { font-family: var(--font-display); font-size: 34px; font-weight: 500; color: var(--navy); letter-spacing: -.02em; }
.fact-l { font-size: 14px; color: var(--slate); margin-top: 6px; }

/* ---------- Вендори ---------- */

.vendors {
  display: flex; flex-wrap: wrap;
  gap: 1px; background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.vendor {
  background: #ffffff;
  flex: 1 1 130px;
  display: flex; align-items: center; justify-content: center;
  padding: 26px 20px; min-height: 96px;
}
.vendor img { max-height: 34px; width: auto; object-fit: contain; }

/* ---------- Відгуки ---------- */

.quotes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.quote {
  border-left: 3px solid var(--sky);
  padding: 4px 0 4px 26px;
}
.quote p { font-size: 16px; color: var(--ink); }
.quote-by { display: flex; align-items: center; gap: 14px; margin-top: 18px; }
.quote-by img { width: 44px; height: 44px; object-fit: contain; }
.quote-by span { font-family: var(--font-mono); font-size: 13px; color: var(--slate); }

/* ---------- Внутрішні сторінки ---------- */

.page-head {
  background: var(--ink); color: var(--white);
  padding-block: clamp(48px, 6vw, 76px);
  background-image:
    linear-gradient(rgba(81, 184, 233, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(81, 184, 233, .06) 1px, transparent 1px);
  background-size: 56px 56px;
}
.page-head h1 { color: var(--white); max-width: 20ch; }
.page-head .eyebrow { color: var(--sky); }
.page-head .eyebrow::after { background: var(--line-dark); }
.page-head .lead { color: #b9cbdb; margin-top: 22px; }

.prose { max-width: 74ch; }
.prose p { color: var(--slate); }
.prose h2 { margin-top: 2em; margin-bottom: .7em; }

.checklist { list-style: none; padding: 0; margin: 0; display: grid; gap: 1px; background: var(--line); border-block: 1px solid var(--line); }
.checklist li {
  background: var(--white);
  padding: 16px 0 16px 34px;
  position: relative;
  font-size: 16px;
}
.checklist li::before {
  content: "";
  position: absolute; left: 8px; top: 26px;
  width: 10px; height: 1px; background: var(--sky);
}

.block { margin-bottom: 44px; }
.block h2 { margin-bottom: 20px; }

.cta-band { background: var(--paper); border-top: 1px solid var(--line); padding-block: var(--gap); }
.cta-band h2 { max-width: 20ch; }
.cta-band .lead { margin-bottom: 28px; }

/* ---------- Контакти ---------- */

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 64px); }
.contact-list { list-style: none; padding: 0; margin: 0; }
.contact-list li { padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact-list li:first-child { border-top: 1px solid var(--line); }
.c-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--blue); display: block; margin-bottom: 6px; }
.c-value { font-size: 18px; color: var(--ink); }

.field { margin-bottom: 18px; }
.field label { display: block; font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--slate); margin-bottom: 7px; }
.field input, .field textarea {
  width: 100%; font-family: var(--font-body); font-size: 16px;
  padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--white); color: var(--ink);
}
.field input:focus, .field textarea:focus { border-color: var(--blue); outline: none; box-shadow: 0 0 0 3px rgba(81,184,233,.25); }
.form-note { font-size: 13px; color: var(--slate); margin-top: 14px; }

/* ---------- Підвал ---------- */

.site-foot { background: var(--ink); color: #9ab2c7; padding-block: 56px 32px; font-size: 15px; }
.foot-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 40px; }
.site-foot img { height: 54px; width: auto; margin-bottom: 18px; }
.site-foot h4 { font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--sky); margin: 0 0 14px; font-weight: 400; }
.site-foot ul { list-style: none; padding: 0; margin: 0; }
.site-foot li { margin-bottom: 9px; }
.site-foot a { color: #cfdde8; }
.site-foot a:hover { color: var(--sky); }
.foot-bottom { border-top: 1px solid var(--line-dark); margin-top: 44px; padding-top: 22px; font-size: 13px; color: #7f9ab3; display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between; }

/* ---------- Адаптив ---------- */

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .quotes { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .head-cta { display: none; }
  .nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--white); border-bottom: 1px solid var(--line);
    box-shadow: 0 14px 28px rgba(0, 27, 56, .16);
    padding: 8px 24px 18px;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 13px 0; border-bottom: 1px solid var(--line); }
  .svc { grid-template-columns: 1fr; gap: 10px; padding: 24px 20px; }
  .svc-go { display: none; }
}

.prose > .block:first-child h2 { margin-top: 0; }
.block:last-child { margin-bottom: 0; }


/* Дуже вузькі екрани */
@media (max-width: 400px) {
  .wrap { padding-inline: 18px; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .layer { grid-template-columns: 34px 1fr; gap: 12px; padding: 13px 14px; }
}

/* Сторінка політики конфіденційності */
.legal { max-width: 70ch; }
.legal h2 { margin-top: 1.8em; margin-bottom: .6em; }
.legal ul { padding-left: 20px; }
.legal li { margin-bottom: 8px; color: var(--slate); }
.legal p { color: var(--slate); }
.legal-updated { font-family: var(--font-mono); font-size: 13px; color: var(--slate); }

/* Перемикач мови */
.head-right { display: flex; align-items: center; gap: 20px; }
.lang-switch {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .08em;
  color: var(--navy); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 6px 11px; text-decoration: none; transition: border-color .18s ease, background .18s ease;
}
.lang-switch:hover { border-color: var(--blue); background: #eaf4fb; text-decoration: none; }

.foot-reg { font-family: var(--font-mono); font-size: 13px; color: #7f9ab3; margin-top: -.6em; }

@media (max-width: 760px) {
  .head-right { gap: 12px; }
}

/* Контактний блок без форми */
.contact-direct h2 { margin-bottom: .6em; }
.contact-direct p { color: var(--slate); max-width: 50ch; }
.contact-direct .btn { margin-top: 10px; }
.contact-or { font-size: 15px; margin-top: 22px; }