:root {
  --bg: #000;
  --accent-rgb: 210, 52, 37;
  --accent: rgb(var(--accent-rgb));
  --line: rgba(var(--accent-rgb), 0.56);
  --line-soft: rgba(var(--accent-rgb), 0.34);
  --text: #f4f7fc;
  --muted: #a5afc3;
  --font-main: "Segoe UI", "SF Pro Text", "SF Pro Display", -apple-system, BlinkMacSystemFont, "Roboto", sans-serif;
}

* {
  box-sizing: border-box;
}

button {
  text-align: center;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-main);
  overflow-x: clip;
  scroll-behavior: smooth;
}

body.mobile-nav-open {
  overflow: hidden;
}

#spaceGrid {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  background: #000;
}

.container {
  width: min(1180px, 92vw);
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10000;
  background: transparent;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--line);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-menu {
  margin-top: 0;
}

.mobile-nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  border: 1px solid var(--line-soft);
  background: rgba(0, 0, 0, 0.82);
  padding: 0;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease;
}

.mobile-nav-toggle-line {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: #fff;
  transition: transform 200ms ease, opacity 160ms ease;
}

.mobile-nav-toggle .mobile-nav-toggle-line + .mobile-nav-toggle-line {
  margin-top: 4px;
}

.mobile-nav-toggle.is-open .mobile-nav-toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.mobile-nav-toggle.is-open .mobile-nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle.is-open .mobile-nav-toggle-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 9px 12px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  color: #f0f3fb;
  border: 1px solid var(--line-soft);
  background: rgba(0, 0, 0, 0.78);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover {
  transform: translateY(-1px);
  border-color: var(--line);
}

.hero {
  min-height: 100svh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 88px 0 112px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(68px, 14vw, 218px);
  line-height: 0.9;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-shadow: 0 0 22px rgba(var(--accent-rgb), 0.2);
}

.scroll-hint {
  margin-top: 28px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: #d7e0f2;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  background: rgba(0, 0, 0, 0.78);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.scroll-hint:hover {
  transform: translateY(-2px);
  border-color: var(--line);
}

.services {
  padding: 10px 0 70px;
}

.section-title {
  margin: 0 0 8px;
  font-size: clamp(36px, 6vw, 58px);
  line-height: 1;
}

.section-subtitle {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 16px;
}

.cards-shell {
  display: flex;
  align-items: stretch;
  gap: 18px;
  min-height: 390px;
  overflow: hidden;
}

.service-card {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  min-height: 390px;
  transition:
    flex 0.72s cubic-bezier(0.2, 0.74, 0.2, 1),
    transform 0.62s cubic-bezier(0.2, 0.74, 0.2, 1),
    opacity 0.4s ease,
    min-height 0.52s ease;
}

.cards-shell.is-open.open-left .service-card--left,
.cards-shell.is-open.open-right .service-card--right {
  flex: 1 1 100%;
}

.cards-shell.is-open.open-left .service-card--right {
  flex: 0 0 0;
  opacity: 0;
  transform: translateX(120%);
  pointer-events: none;
}

.cards-shell.is-open.open-right .service-card--left {
  flex: 0 0 0;
  opacity: 0;
  transform: translateX(-120%);
  pointer-events: none;
}

.service-front,
.service-expanded {
  position: absolute;
  inset: 0;
  border-radius: 26px;
  border: 1px solid var(--line);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.58);
  backdrop-filter: blur(1px);
}

.service-front {
  width: 100%;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 20px;
  cursor: pointer;
  isolation: isolate;
  transition: opacity 0.34s ease, transform 0.34s ease, border-color 0.3s ease;
}

.service-front::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  z-index: -1;
  background: var(--accent);
  border-radius: inherit;
  transform: scale(0);
  transform-origin: center;
  transition:
    transform 0.48s cubic-bezier(0.2, 0.72, 0.2, 1),
    opacity 0.32s ease;
}

.service-front:hover::before {
  opacity: 1;
  transform: scale(1);
}

.cards-shell.hover-lock .service-front {
  pointer-events: none;
}

.cards-shell.hover-lock .service-front::before,
.cards-shell.hover-lock .service-front:hover::before {
  opacity: 0;
  transform: scale(0);
  transition: none !important;
}

.service-name {
  font-size: clamp(38px, 4.3vw, 58px);
  font-weight: 900;
  letter-spacing: 0.01em;
  color: var(--accent);
  transition: color 0.28s ease;
  display: block;
  width: 100%;
  text-align: center;
}

.service-front:hover .service-name {
  color: #fff;
}

.cards-shell.hover-lock .service-front .service-name {
  color: var(--accent);
}

.brand-word {
  display: inline-block;
}

.service-expanded {
  display: grid;
  grid-template-columns: clamp(220px, 24vw, 340px) 1fr auto;
  grid-template-areas: "logo main cta";
  align-items: stretch;
  opacity: 0;
  transform: scale(0.985);
  pointer-events: none;
}

.service-card.is-expanded .service-front {
  opacity: 0;
  transform: scale(0.97);
  pointer-events: none;
}

.service-card.is-expanded .service-expanded {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.expanded-logo {
  grid-area: logo;
  height: 100%;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.expanded-logo img {
  width: min(calc(100% - 4px), 340px);
  height: min(calc(100% - 4px), 340px);
  object-fit: cover;
  display: block;
  border: 1px solid var(--line-soft);
  border-radius: 14px;
}

.expanded-main {
  grid-area: main;
  padding: 24px 24px 20px 4px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.expanded-main h3 {
  margin: 0;
  font-size: clamp(32px, 4.1vw, 58px);
}

.expanded-main p {
  margin: 0;
  color: #d5ddee;
  font-size: 16px;
  line-height: 1.58;
  max-width: 800px;
}

.expanded-cta {
  grid-area: cta;
  padding: 0 22px 20px 0;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  gap: 6px;
}

.expanded-cta .btn-open,
.expanded-cta .btn-cabinet {
  height: 54px;
  min-height: 54px;
  padding: 0 16px;
  margin: 0;
  font-size: 16px;
  line-height: 1.1;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border-radius: 12px;
  padding: 11px 16px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  border: 1px solid transparent;
  font-size: 14px;
}

.btn-primary {
  color: #fff;
  border-color: var(--line);
  background: rgba(var(--accent-rgb), 0.95);
  box-shadow: 0 12px 24px rgba(var(--accent-rgb), 0.24);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 26px rgba(var(--accent-rgb), 0.32);
}

.btn-open {
  font-size: 18px;
  padding: 18px 28px;
  min-width: 214px;
  min-height: 66px;
}

.btn-cabinet {
  color: #fff;
  border-color: var(--line);
  background: rgba(0, 0, 0, 0.72);
}

.btn-cabinet:hover {
  transform: translateY(-1px);
  border-color: rgba(var(--accent-rgb), 0.95);
  box-shadow: 0 10px 18px rgba(var(--accent-rgb), 0.22);
}

.back-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 5;
  border: 1px solid var(--line);
  background: #000;
  color: var(--accent);
  border-radius: 12px;
  height: 58px;
  width: 58px;
  padding: 0;
  margin: 0;
  cursor: pointer;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
  display: grid;
  place-items: center;
}

.back-btn:hover {
  box-shadow: 0 10px 18px rgba(var(--accent-rgb), 0.28);
  border-color: rgba(var(--accent-rgb), 0.95);
}

.back-icon {
  width: 24px;
  height: 24px;
  display: block;
  stroke: currentColor;
  fill: none;
  stroke-width: 2.3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.62s ease, transform 0.62s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(var(--accent-rgb), 0.2);
  color: #8f99ae;
  text-align: center;
  padding: 14px 0 18px;
  font-size: 14px;
}

@media (max-width: 1100px) {
  .service-expanded {
    grid-template-columns: 190px 1fr auto;
  }

  .expanded-main {
    padding: 22px 18px 18px 2px;
  }

  .btn-open {
    min-width: 176px;
    font-size: 16px;
  }
}

@media (max-width: 980px) {
  .cards-shell {
    flex-direction: column;
    min-height: 0;
    gap: 14px;
  }

  .service-card {
    min-height: 300px;
  }

  .service-card.is-expanded {
    min-height: 500px;
  }

  .cards-shell.is-open.open-left .service-card--right,
  .cards-shell.is-open.open-right .service-card--left {
    flex: 1 1 auto;
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .service-expanded {
    grid-template-columns: 160px 1fr;
    grid-template-areas:
      "logo main"
      "logo cta";
  }

  .expanded-logo {
    padding: 14px;
  }

  .expanded-logo img {
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
  }

  .expanded-cta {
    justify-content: flex-end;
    padding: 0 18px 18px;
  }

  .btn-open {
    min-height: 58px;
  }
}

@media (max-width: 760px) {
  .nav {
    position: relative;
    align-items: center;
  }

  .mobile-nav-toggle {
    display: inline-flex;
    flex-direction: column;
    margin-left: auto;
    position: relative;
    z-index: 10020;
  }

  .nav-links.header-menu {
    position: fixed;
    top: 72px;
    right: 12px;
    z-index: 10010;
    width: min(280px, 84vw);
    display: grid;
    gap: 8px;
    padding: 10px;
    border: 1px solid rgba(var(--accent-rgb), 0.56);
    border-radius: 14px;
    background: #020202;
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.64);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px) scale(0.98);
    transform-origin: top right;
    transition: opacity 180ms ease, transform 200ms ease;
  }

  .nav-links.header-menu.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
  }

  .nav-link {
    width: 100%;
    min-height: 46px;
    justify-content: center;
  }

  .hero {
    padding-top: 112px;
  }

  .service-card {
    min-height: 320px;
  }

  .service-card.is-expanded {
    min-height: 720px;
  }

  .cards-shell {
    overflow: visible;
  }

  .service-expanded {
    grid-template-columns: 1fr;
    grid-template-areas:
      "logo"
      "main"
      "cta";
  }

  .expanded-logo {
    height: auto;
    padding: 16px 16px 8px;
  }

  .expanded-logo img {
    width: min(240px, 100%);
    height: min(240px, calc(100vw - 64px));
  }

  .expanded-main {
    padding: 14px 16px;
    gap: 10px;
  }

  .expanded-main h3 {
    font-size: 34px;
  }

  .expanded-cta {
    padding: 0 16px 16px;
    row-gap: 2px;
    column-gap: 6px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 58px;
    grid-template-areas:
      "cabinet cabinet"
      "bot back";
    align-items: stretch;
  }

  .expanded-cta .btn,
  .expanded-cta .back-btn {
    min-height: 58px;
    height: 58px;
    margin: 0;
  }

  .expanded-cta .btn-open,
  .expanded-cta .btn-cabinet {
    min-height: 58px;
    height: 58px;
    padding: 0 14px;
    line-height: 1;
  }

  .btn-open {
    width: 100%;
    min-width: 0;
    flex: 0 1 auto;
  }

  .btn-cabinet {
    grid-area: cabinet;
  }

  .btn-primary.btn-open {
    grid-area: bot;
  }

  .back-btn {
    position: static;
    top: auto;
    right: auto;
    bottom: auto;
    margin: 0;
    width: 58px;
    height: 58px;
    grid-area: back;
  }
}