:root {
  color-scheme: dark;
  --bg: #0b0f14;
  --bg-soft: #101720;
  --panel: #121a24;
  --panel-2: #17212d;
  --text: #f4f7fb;
  --muted: #9aa8b7;
  --line: rgba(255, 255, 255, 0.11);
  --accent: #2dd4bf;
  --accent-strong: #14b8a6;
  --danger: #f97373;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
  --radius: 8px;
  --container: 1180px;
  --header: 76px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    linear-gradient(180deg, rgba(45, 212, 191, 0.08), transparent 420px),
    radial-gradient(circle at 50% 0, rgba(255, 255, 255, 0.06), transparent 360px),
    var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

body.modal-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

::selection {
  background: rgba(45, 212, 191, 0.3);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  min-height: var(--header);
  padding: 14px max(18px, calc((100vw - var(--container)) / 2));
  border-bottom: 1px solid transparent;
  background: rgba(11, 15, 20, 0.82);
  backdrop-filter: blur(18px);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  background: rgba(11, 15, 20, 0.94);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(45, 212, 191, 0.48);
  border-radius: var(--radius);
  background: rgba(45, 212, 191, 0.11);
  color: var(--accent);
  font-size: 14px;
}

.main-nav {
  display: flex;
  justify-content: center;
  gap: 4px;
}

.main-nav a,
.header-contact,
.footer-links a {
  border-radius: var(--radius);
  color: var(--muted);
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.main-nav a {
  padding: 10px 12px;
  font-size: 14px;
}

.main-nav a:hover,
.main-nav a:focus-visible,
.main-nav a.active {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

.header-contact {
  padding: 10px 14px;
  border: 1px solid rgba(45, 212, 191, 0.4);
  color: var(--accent);
  font-weight: 700;
}

.header-contact:hover,
.header-contact:focus-visible {
  background: rgba(45, 212, 191, 0.12);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 96px 18px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  align-items: center;
  gap: 54px;
  min-height: calc(100vh - var(--header));
  padding-top: 72px;
  padding-bottom: 80px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 18px;
  font-size: clamp(46px, 8vw, 92px);
  line-height: 0.94;
  letter-spacing: 0;
}

h2 {
  max-width: 820px;
  margin-bottom: 18px;
  font-size: clamp(32px, 4.8vw, 58px);
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
  line-height: 1.22;
}

.hero-lead {
  max-width: 780px;
  margin-bottom: 18px;
  color: #d8e1eb;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.22;
}

.hero-text,
.section-heading p,
.about-text p,
.service-card p,
.process-list p,
.case-card p,
.placeholder-note,
.contact-lines,
.site-footer p {
  color: var(--muted);
  line-height: 1.68;
}

.hero-text {
  max-width: 740px;
  font-size: 18px;
}

.hero-actions,
.footer-links,
.contact-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 800;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.button:hover,
.button:focus-visible,
.filter-button:hover,
.filter-button:focus-visible {
  transform: translateY(-1px);
}

.button:active,
.filter-button:active {
  transform: translateY(0);
}

.button.primary {
  border-color: transparent;
  background: var(--accent);
  color: #06100f;
}

.button.primary:hover,
.button.primary:focus-visible {
  background: #5eead4;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  border-color: rgba(45, 212, 191, 0.5);
  background: rgba(45, 212, 191, 0.1);
}

.hero-tags,
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
}

.hero-tags li,
.tech-grid span,
.case-tag,
.advantages span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: #d8e1eb;
}

.hero-tags li,
.tech-grid span,
.case-tag {
  padding: 8px 11px;
  font-size: 13px;
}

.hero-visual {
  position: relative;
  min-height: 520px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(rgba(255,255,255,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.045) 1px, transparent 1px),
    rgba(18, 26, 36, 0.52);
  background-size: 34px 34px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-visual::before,
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 16%;
  border: 1px solid rgba(45, 212, 191, 0.22);
  transform: rotate(-12deg);
}

.hero-visual::after {
  inset: 27%;
  transform: rotate(18deg);
  border-color: rgba(255, 255, 255, 0.13);
}

.system-card {
  position: absolute;
  z-index: 2;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 15, 20, 0.86);
  box-shadow: var(--shadow);
}

.terminal-card {
  top: 34px;
  left: 26px;
  right: 26px;
  display: grid;
  gap: 12px;
  padding: 18px;
}

.terminal-card code {
  color: #d7fff8;
  font-size: 14px;
  white-space: normal;
}

.terminal-card .muted {
  color: var(--muted);
}

.terminal-card .accent {
  color: var(--accent);
}

.window-dots {
  display: flex;
  gap: 7px;
  margin-bottom: 5px;
}

.window-dots span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.28);
}

.network-map {
  position: absolute;
  inset: 132px 24px 96px;
}

.network-map::before {
  content: "";
  position: absolute;
  inset: 12%;
  border: 1px dashed rgba(45, 212, 191, 0.5);
  transform: skewY(-8deg);
}

.node {
  position: absolute;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 70px;
  height: 70px;
  border: 1px solid rgba(45, 212, 191, 0.5);
  border-radius: 50%;
  background: #0d141c;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
}

.node-a { left: 5%; top: 28%; }
.node-b { left: 42%; top: 4%; }
.node-c { right: 6%; top: 31%; }
.node-d { left: 28%; bottom: 2%; }
.node-e { right: 22%; bottom: 13%; }

.metric-card {
  right: 28px;
  bottom: 28px;
  width: min(250px, calc(100% - 56px));
  padding: 18px;
}

.metric-card span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.metric-card strong {
  display: block;
  margin-top: 5px;
  color: var(--text);
  font-size: 28px;
  line-height: 1;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 42px;
}

.about-text {
  font-size: 17px;
}

.advantages {
  grid-column: 2;
  display: grid;
  gap: 10px;
}

.advantages span {
  padding: 13px 14px;
  border-radius: var(--radius);
}

.service-grid,
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.service-card,
.case-card,
.process-list li,
.contact-panel,
.contact-form {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025));
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.16);
}

.service-card,
.case-card {
  min-height: 245px;
  padding: 22px;
}

.service-card:hover,
.case-card:hover {
  border-color: rgba(45, 212, 191, 0.35);
  background: linear-gradient(180deg, rgba(45, 212, 191, 0.08), rgba(255, 255, 255, 0.03));
}

.card-index {
  display: inline-block;
  margin-bottom: 42px;
  color: var(--accent);
  font-weight: 900;
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.filter-button {
  min-height: 40px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.filter-button.active {
  border-color: transparent;
  background: var(--accent);
  color: #06100f;
  font-weight: 800;
}

.case-card {
  display: flex;
  flex-direction: column;
}

.case-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.case-category {
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 16px 0;
}

.case-result {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  color: #d8e1eb;
}

.case-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 18px;
}

.case-card .button {
  width: 100%;
}

.modal-actions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.empty-state {
  grid-column: 1 / -1;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
  padding: 0;
  margin: 0;
  list-style: none;
  counter-reset: item;
}

.process-list li {
  min-height: 245px;
  padding: 20px;
}

.process-list span {
  display: inline-block;
  margin-bottom: 34px;
  color: var(--accent);
  font-weight: 900;
}

.tech-grid {
  margin-top: 0;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
  gap: 18px;
  align-items: start;
}

.contact-panel,
.contact-form {
  padding: 22px;
}

.contact-panel {
  flex-direction: column;
}

.contact-lines {
  margin: 6px 0 0;
}

.contact-lines a {
  color: var(--text);
  border-bottom: 1px solid rgba(45, 212, 191, 0.45);
}

.contact-lines a:hover,
.contact-lines a:focus-visible {
  color: var(--accent);
}

.contact-form {
  display: grid;
  gap: 15px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: #d8e1eb;
  font-weight: 700;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.18);
  color: var(--text);
  padding: 13px 14px;
  outline: none;
  resize: vertical;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: rgba(45, 212, 191, 0.68);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.12);
}

.honeypot,
.honeypot input {
  display: none !important;
}

.contact-form button:disabled {
  cursor: wait;
  opacity: 0.72;
  transform: none;
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: var(--accent);
}

.form-status[data-status="error"] {
  color: var(--danger);
}

.form-status[data-status="success"] {
  color: var(--accent);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 20px;
  align-items: center;
  max-width: var(--container);
  margin: 0 auto;
  padding: 36px 18px;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin-bottom: 0;
}

.footer-links a {
  padding: 8px 10px;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--accent);
  background: rgba(45, 212, 191, 0.08);
}

.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(45, 212, 191, 0.4);
  border-radius: var(--radius);
  background: rgba(11, 15, 20, 0.86);
  color: var(--accent);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
}

.modal.is-open {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.74);
  backdrop-filter: blur(12px);
}

.modal-panel {
  position: relative;
  z-index: 1;
  width: min(860px, 100%);
  max-height: min(86vh, 900px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #101720;
  box-shadow: var(--shadow);
  padding: 26px;
  outline: none;
}

.modal-close {
  position: sticky;
  top: 0;
  float: right;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-size: 28px;
  line-height: 1;
}

.modal h2 {
  padding-right: 42px;
  font-size: clamp(28px, 5vw, 46px);
}

.modal-section {
  margin-top: 22px;
}

.modal-section h3 {
  color: var(--accent);
  font-size: 16px;
  text-transform: uppercase;
}

.modal-section ul {
  padding-left: 20px;
  color: #d8e1eb;
  line-height: 1.7;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid rgba(45, 212, 191, 0.72);
  outline-offset: 3px;
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: auto auto;
  }

  .menu-toggle {
    display: block;
    justify-self: end;
  }

  .main-nav,
  .header-contact {
    display: none;
  }

  .main-nav.is-open {
    position: absolute;
    top: calc(100% + 1px);
    left: 18px;
    right: 18px;
    display: grid;
    gap: 4px;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(11, 15, 20, 0.98);
    box-shadow: var(--shadow);
  }

  .main-nav.is-open a {
    padding: 14px;
  }

  .hero,
  .split,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 52px;
  }

  .advantages {
    grid-column: auto;
  }

  .service-grid,
  .case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-list {
    grid-template-columns: 1fr;
  }

  .process-list li {
    min-height: auto;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .section {
    padding: 70px 16px;
  }

  .hero {
    padding-top: 40px;
  }

  .hero-visual {
    min-height: 420px;
  }

  .terminal-card {
    left: 14px;
    right: 14px;
  }

  .node {
    width: 58px;
    height: 58px;
    font-size: 12px;
  }

  .metric-card {
    right: 14px;
    bottom: 14px;
    width: calc(100% - 28px);
  }

  .service-grid,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions .button,
  .contact-panel .button {
    width: 100%;
  }

  .modal-actions {
    grid-template-columns: 1fr;
  }

  .filters {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .filter-button {
    width: 100%;
  }
}

@media (max-width: 360px) {
  .brand {
    font-size: 15px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}