:root {
  --color-ink: #101318;
  --color-text: #202833;
  --color-muted: #68717d;
  --color-line: #d9dfe7;
  --color-soft: #f4f6f8;
  --color-white: #ffffff;
  --color-red: #d81324;
  --color-red-dark: #a80f1c;
  --color-steel: #31556b;
  --shadow-soft: 0 22px 70px rgba(11, 18, 28, 0.16);
  --max-page: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--color-white);
  color: var(--color-text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.5;
}

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

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 20;
  background: var(--color-red);
  color: var(--color-white);
  padding: 10px 12px;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(190px, auto) 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 74px;
  padding: 0 clamp(18px, 4vw, 48px);
  color: var(--color-white);
  background: rgba(12, 15, 20, 0.96);
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  width: 24px;
  height: 28px;
  background: var(--color-red);
  clip-path: polygon(50% 0, 60% 33%, 100% 15%, 74% 48%, 100% 60%, 62% 64%, 50% 100%, 38% 64%, 0 60%, 26% 48%, 0 15%, 40% 33%);
  flex: 0 0 auto;
}

.brand strong,
.brand span span {
  display: block;
  line-height: 1;
  letter-spacing: 0;
}

.brand strong {
  font-size: 15px;
  text-transform: uppercase;
}

.brand span span {
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 11px;
}

.site-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(12px, 2.5vw, 28px);
}

.site-nav a,
.header-cta,
.button {
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
  letter-spacing: 0;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.76);
  padding: 26px 0 22px;
  border-bottom: 3px solid transparent;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-white);
  border-bottom-color: var(--color-red);
}

.header-cta {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  color: var(--color-white);
  background: var(--color-red);
  border: 1px solid var(--color-red);
  border-radius: 4px;
  white-space: nowrap;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(420px, 0.92fr);
  min-height: calc(100vh - 74px);
  background: var(--color-ink);
  color: var(--color-white);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(52px, 8vw, 96px) clamp(24px, 4vw, 54px) clamp(52px, 8vw, 96px) clamp(24px, 6vw, 70px);
}

.hero h1,
.page-hero h1 {
  margin: 0;
  max-width: 850px;
  line-height: 0.96;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 720px;
  font-size: clamp(42px, 5.6vw, 76px);
}

.page-hero h1 {
  font-size: clamp(42px, 5.7vw, 78px);
}

.hero h1::after,
.page-hero h1::after {
  content: "";
  display: block;
  width: 54px;
  height: 3px;
  margin: 26px 0 0;
  background: var(--color-red);
}

.hero p,
.page-hero p {
  max-width: 720px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.45;
}

.hero-media {
  position: relative;
  min-height: 520px;
  margin: 0;
  overflow: hidden;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-media::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(16, 19, 24, 0.3), rgba(16, 19, 24, 0));
  pointer-events: none;
}

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

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  color: var(--color-white);
  background: var(--color-red);
  border: 1px solid var(--color-red);
  border-radius: 4px;
}

.button:hover,
.header-cta:hover {
  background: var(--color-red-dark);
  border-color: var(--color-red-dark);
}

.button-secondary {
  color: var(--color-white);
  background: transparent;
  border-color: rgba(255, 255, 255, 0.48);
}

.band,
.cta-panel,
.page-hero,
.site-footer {
  width: min(var(--max-page), calc(100vw - 36px));
  margin: 0 auto;
}

.band {
  padding: clamp(54px, 8vw, 96px) 0;
  border-bottom: 1px solid var(--color-line);
}

.split,
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(320px, 1.06fr);
  gap: clamp(34px, 7vw, 78px);
  align-items: start;
}

.section-label {
  margin: 0 0 14px;
  color: var(--color-red);
  font-size: 13px;
  font-weight: 850;
  text-transform: uppercase;
}

.band h2,
.cta-panel h2 {
  margin: 0;
  max-width: 820px;
  color: var(--color-ink);
  font-size: clamp(30px, 4.2vw, 52px);
  line-height: 1.02;
  letter-spacing: 0;
}

.band p {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--color-muted);
  font-size: 18px;
}

.check-list {
  display: grid;
  gap: 15px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 34px;
  color: var(--color-text);
  font-size: 17px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 18px;
  height: 18px;
  border: 1px solid var(--color-steel);
  border-radius: 50%;
}

.check-list li::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 9px;
  width: 8px;
  height: 4px;
  border-left: 2px solid var(--color-steel);
  border-bottom: 2px solid var(--color-steel);
  transform: rotate(-45deg);
}

.check-list.danger li::before {
  border-color: var(--color-red);
}

.check-list.danger li::after {
  width: 8px;
  height: 8px;
  left: 5px;
  top: 9px;
  border: 0;
  background:
    linear-gradient(45deg, transparent 45%, var(--color-red) 45%, var(--color-red) 55%, transparent 55%),
    linear-gradient(-45deg, transparent 45%, var(--color-red) 45%, var(--color-red) 55%, transparent 55%);
  transform: none;
}

.feature-grid {
  display: grid;
  gap: 1px;
  margin-top: 38px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.feature-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-grid.five {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.card {
  min-height: 166px;
  padding: 24px;
  background: var(--color-white);
}

.card h3 {
  margin: 0;
  color: var(--color-ink);
  font-size: 18px;
  line-height: 1.15;
}

.card p {
  margin: 12px 0 0;
  color: var(--color-muted);
  font-size: 15px;
}

.center-line {
  max-width: none;
  margin: 34px auto 0;
  color: var(--color-ink);
  font-weight: 800;
  text-align: center;
}

.step-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.step-list li {
  min-height: 142px;
  padding: 22px;
  background: var(--color-white);
}

.step-list strong {
  display: block;
  color: var(--color-ink);
  font-size: 18px;
}

.step-list span {
  display: block;
  margin-top: 10px;
  color: var(--color-muted);
}

.cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-top: 56px;
  margin-bottom: 56px;
  padding: 28px;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: var(--color-soft);
}

.cta-panel h2 {
  font-size: clamp(24px, 3vw, 34px);
}

.cta-panel p {
  margin: 10px 0 0;
  color: var(--color-muted);
}

.cta-panel .button,
.page-hero .button-secondary {
  color: var(--color-ink);
  border-color: rgba(16, 19, 24, 0.24);
}

.page-hero {
  padding: clamp(62px, 10vw, 118px) 0 clamp(48px, 8vw, 88px);
  color: var(--color-white);
}

main > .page-hero:first-child {
  width: auto;
  max-width: none;
  margin: 0;
  padding-left: max(18px, calc((100vw - var(--max-page)) / 2));
  padding-right: max(18px, calc((100vw - var(--max-page)) / 2));
  background:
    linear-gradient(120deg, rgba(16, 19, 24, 0.98), rgba(16, 19, 24, 0.91)),
    url("/assets/images/hero-response-room.png") center / cover;
}

.system-panel,
.diagnostic-card,
.contact-panel {
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(10px);
}

.system-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.18);
}

.system-panel span {
  min-height: 96px;
  padding: 22px;
  background: rgba(16, 19, 24, 0.78);
  font-weight: 800;
}

.diagnostic-card,
.contact-panel {
  padding: 28px;
}

.diagnostic-card h2 {
  margin: 0 0 18px;
  color: var(--color-white);
}

.diagnostic-card ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 18px;
}

.diagnostic-card li,
.contact-panel span,
.contact-panel a {
  color: rgba(255, 255, 255, 0.84);
}

.question-list {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.question-list p {
  max-width: none;
  margin: 0;
  padding: 20px 22px;
  background: var(--color-white);
  color: var(--color-text);
}

.contact-panel {
  display: grid;
  gap: 16px;
}

.contact-panel a {
  font-size: clamp(19px, 2.3vw, 26px);
  font-weight: 800;
  text-decoration: none;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(180px, auto) 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 32px 0 42px;
  color: var(--color-white);
}

body::after {
  content: "";
  display: block;
  height: 0;
  background: var(--color-ink);
}

.site-footer {
  width: auto;
  max-width: none;
  margin: 0;
  padding-left: max(18px, calc((100vw - var(--max-page)) / 2));
  padding-right: max(18px, calc((100vw - var(--max-page)) / 2));
  background: var(--color-ink);
}

.site-footer p {
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
}

.site-footer nav {
  display: flex;
  gap: 18px;
}

.site-footer a {
  color: var(--color-white);
  text-decoration: none;
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr auto;
    gap: 12px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .site-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    overflow-x: auto;
  }

  .site-nav a {
    padding: 10px 0 8px;
  }

  .hero,
  .split,
  .two-column,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: 0;
  }

  .hero-media {
    min-height: 360px;
    order: -1;
  }

  .feature-grid.three,
  .feature-grid.five {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cta-panel {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
  }

  .brand {
    min-width: 170px;
  }

  .header-cta {
    min-height: 38px;
    padding: 0 12px;
    font-size: 13px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: clamp(38px, 12vw, 58px);
  }

  .hero-copy {
    padding: 44px 18px 52px;
  }

  .hero-media {
    min-height: 300px;
  }

  .feature-grid.three,
  .feature-grid.five,
  .step-list,
  .system-panel {
    grid-template-columns: 1fr;
  }

  .band,
  .cta-panel {
    width: calc(100vw - 32px);
  }

  .actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}