:root {
  --kt-blue: #008CFF;
  --kt-blue-hover: #0070D6;
  --kt-blue-dim: rgba(0, 140, 255, 0.10);
  --kt-black: #000000;
  --kt-white: #FFFFFF;
  --kt-dark: #0D0D12;
  --kt-gray-light: #F6F6F6;
  --kt-gray-mid: #EDEDED;
  --kt-gray-text: #6F6F6F;
  --kt-gray-border: #C7C7C7;
  --kt-red: #FFCFCF;
  --kt-red-text: #DC2626;
  --kt-green: #22C55E;
  --kt-font: "Golos Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--kt-white);
  color: var(--kt-black);
  font-family: var(--kt-font);
  font-size: 15px;
  line-height: 1.6;
}

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

img {
  display: block;
}

pre {
  margin: 16px 0 0;
  overflow-x: auto;
  border-radius: 8px;
  background: var(--kt-dark);
  color: var(--kt-white);
  padding: 18px;
  font-size: 13px;
  line-height: 1.55;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 100;
  background: var(--kt-blue);
  color: var(--kt-white);
  padding: 10px 16px;
  border-radius: 100px;
  font-weight: 700;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
  min-height: 76px;
  padding: 18px clamp(20px, 5vw, 64px);
  background: rgba(0, 0, 0, 0.96);
  color: var(--kt-white);
}

.brand {
  color: var(--kt-white);
}

.brand img {
  width: 108px;
  height: auto;
}

.nav {
  display: flex;
  gap: 28px;
  color: var(--kt-gray-border);
}

.nav a:hover {
  color: var(--kt-white);
}

.topbar-action form {
  margin: 0;
}

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.narrow {
  width: min(760px, calc(100% - 40px));
}

.hero {
  min-height: calc(100svh - 76px);
  display: flex;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(0, 140, 255, 0.20), transparent 36%),
    var(--kt-dark);
  color: var(--kt-white);
  padding: 112px 0 96px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 64px;
  align-items: center;
}

.hero-copy {
  max-width: 760px;
}

.section,
.cabinet-hero,
.message-screen {
  padding: 120px 0;
}

.section-gray {
  background: var(--kt-gray-light);
}

.message-screen {
  min-height: calc(100svh - 76px);
  display: flex;
  align-items: center;
}

.cabinet-hero {
  background: var(--kt-dark);
  color: var(--kt-white);
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
  gap: 72px;
}

.cabinet-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.admin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.65fr);
  gap: 24px;
  align-items: start;
}

.guide {
  display: grid;
  gap: 56px;
}

.guide-head {
  max-width: 820px;
}

.steps,
.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.feature-list article,
.steps article,
.panel {
  border-radius: 16px;
  background: var(--kt-gray-light);
  padding: 28px;
}

.section-gray .steps article {
  background: var(--kt-white);
}

.panel {
  background: var(--kt-white);
  border: 1px solid var(--kt-gray-mid);
}

.panel-wide {
  grid-row: span 2;
}

.panel-gap {
  margin-top: 28px;
}

.terminal-panel {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.08);
  padding: 20px;
}

.terminal-panel pre {
  margin-top: 12px;
  background: rgba(0, 0, 0, 0.42);
}

.terminal-dot-row {
  display: flex;
  gap: 8px;
}

.terminal-dot-row span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--kt-blue);
}

.terminal-dot-row span:nth-child(2) {
  background: var(--kt-gray-border);
}

.terminal-dot-row span:nth-child(3) {
  background: var(--kt-green);
}

.label {
  margin: 0 0 16px;
  color: var(--kt-blue);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 500;
  letter-spacing: 0;
}

h1 {
  max-width: 840px;
  font-size: clamp(42px, 8vw, 72px);
  line-height: 1.04;
}

h2 {
  max-width: 760px;
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.1;
}

h3 {
  margin-top: 12px;
  font-size: 24px;
  line-height: 1.2;
}

p {
  margin: 14px 0 0;
  color: var(--kt-gray-text);
}

.hero p,
.cabinet-hero p {
  color: rgba(255, 255, 255, 0.74);
}

.lead {
  max-width: 700px;
  font-size: 20px;
  line-height: 1.55;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border: 1.5px solid transparent;
  border-radius: 100px;
  padding: 11px 20px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}

.button-large {
  min-height: 54px;
  padding: 15px 34px;
  font-size: 17px;
}

.button-primary {
  background: var(--kt-blue);
  color: var(--kt-white);
}

.button-primary:hover {
  background: var(--kt-blue-hover);
}

.button-black {
  background: var(--kt-black);
  color: var(--kt-white);
}

.button-outline,
.button-outline-white {
  background: transparent;
}

.button-outline {
  border-color: var(--kt-black);
  color: var(--kt-black);
}

.button-outline-white {
  border-color: rgba(255, 255, 255, 0.72);
  color: var(--kt-white);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.badge,
.notice {
  display: inline-flex;
  align-items: center;
  border-radius: 100px;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 700;
}

.badge-red,
.notice-error {
  background: var(--kt-red);
  color: var(--kt-red-text);
}

.notice-ok {
  background: rgba(34, 197, 94, 0.12);
  color: #16A34A;
}

.notice {
  margin-top: 22px;
}

.number {
  color: var(--kt-blue);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
}

.form {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

label {
  font-size: 13px;
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  border: 1.5px solid var(--kt-gray-border);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--kt-black);
  font: inherit;
}

textarea {
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--kt-blue);
  outline: none;
}

input[readonly] {
  background: var(--kt-gray-light);
  color: var(--kt-gray-text);
}

.command-line {
  margin-top: 20px;
  border-radius: 8px;
  background: var(--kt-blue-dim);
  color: var(--kt-blue);
  padding: 14px 16px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  overflow-x: auto;
}

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

.form label {
  display: grid;
  gap: 8px;
}

.span-2 {
  grid-column: 1 / -1;
}

.plain-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.plain-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--kt-gray-mid);
  padding-bottom: 12px;
}

.text-link {
  color: var(--kt-blue);
  font-weight: 700;
}

.table-wrap {
  margin-top: 28px;
  overflow-x: auto;
  border: 1px solid var(--kt-gray-mid);
  border-radius: 12px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--kt-white);
  font-size: 13px;
}

th,
td {
  border-bottom: 1px solid var(--kt-gray-mid);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--kt-gray-text);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@media (max-width: 860px) {
  .topbar {
    grid-template-columns: 1fr;
    gap: 16px;
    align-items: start;
  }

  .nav {
    flex-wrap: wrap;
  }

  .hero {
    min-height: auto;
    padding: 88px 0;
  }

  .hero-grid,
  .split,
  .cabinet-grid,
  .admin-grid,
  .steps,
  .feature-list {
    grid-template-columns: 1fr;
  }

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

  .section,
  .cabinet-hero,
  .message-screen {
    padding: 88px 0;
  }
}