:root {
  color-scheme: dark;
  --bg: #05060a;
  --panel: #0b0f18;
  --ink: #eef2f7;
  --dim: #a4aec0;
  --quiet: #8995aa;
  --cyan: #37e1ff;
  --cyan-dark: #0aa7c8;
  --amber: #ffcf3f;
  --red: #ff6060;
  --green: #42e06a;
  --line: #273047;
  --content: 1100px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-width: 280px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(110% 64% at 50% -8%, rgba(55, 225, 255, .12), transparent 57%),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, .021) 0 1px, transparent 1px 4px),
    var(--bg);
  color: var(--ink);
  font: 17px/1.58 ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

a {
  color: var(--cyan);
  text-decoration-color: var(--cyan-dark);
  text-decoration-thickness: 2px;
  text-underline-offset: .22em;
}
a:hover { color: #8cf3ff; }
a:focus-visible,
button:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 10px;
  left: 10px;
  transform: translateY(-160%);
  padding: 10px 14px;
  background: var(--amber);
  color: #111;
  font-weight: 900;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--content), calc(100% - 36px));
  margin: 0 auto;
  padding: 22px 0 12px;
}
.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 900;
  text-decoration: none;
}
.wordmark strong {
  color: var(--cyan);
  font-size: 24px;
  text-shadow: 2px 2px 0 #003743;
}
nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 24px;
  font-size: 14px;
  font-weight: 700;
}
nav a { color: var(--dim); text-decoration: none; }

main,
footer {
  width: min(var(--content), calc(100% - 36px));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(390px, 1.12fr);
  align-items: center;
  gap: clamp(30px, 6vw, 74px);
  min-height: 620px;
  padding: 62px 0 74px;
}
.eyebrow {
  margin: 0 0 10px;
  color: var(--cyan);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1, h2, h3, p { overflow-wrap: break-word; }
h1 {
  margin: 0;
  font-size: clamp(42px, 6.2vw, 74px);
  line-height: 1.02;
  letter-spacing: -.055em;
  text-shadow: 3px 3px 0 #000;
}
h1 span { color: var(--cyan); }
h2 {
  margin: 0;
  font-size: clamp(29px, 4vw, 43px);
  line-height: 1.12;
  letter-spacing: -.035em;
}
h3 { margin: 0 0 9px; font-size: 20px; line-height: 1.25; }
.lede {
  max-width: 49ch;
  margin: 24px 0 0;
  color: var(--dim);
  font-size: clamp(18px, 2vw, 21px);
}
.value-list {
  display: grid;
  gap: 9px;
  margin: 25px 0 0;
  padding: 0;
  list-style: none;
}
.value-list li { position: relative; padding-left: 25px; }
.value-list li::before {
  position: absolute;
  left: 0;
  color: var(--green);
  content: "✓";
  font-weight: 900;
}
.hero-actions,
.text-links,
.footer-links { display: flex; flex-wrap: wrap; gap: 12px 18px; }
.hero-actions { margin-top: 30px; }
.button {
  display: inline-flex;
  min-height: 49px;
  align-items: center;
  justify-content: center;
  padding: 11px 16px;
  border: 3px solid var(--cyan);
  font-size: 15px;
  font-weight: 900;
  text-decoration: none;
  box-shadow: 4px 4px 0 #000;
}
.button.primary { background: var(--cyan); color: #04121a; }
.button.secondary { color: var(--cyan); }
.hero-media { margin: 0; }
.hero-media > img {
  display: block;
  overflow: hidden;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  border: 3px solid var(--line);
  background: #000;
  box-shadow: 10px 10px 0 rgba(0, 0, 0, .65);
}
.hero-media figcaption {
  margin-top: 13px;
  color: var(--quiet);
  font-size: 14px;
  text-align: center;
}
.demo-toggle {
  display: block;
  margin: 13px auto 0;
  border: 0;
  background: transparent;
  color: var(--cyan);
  cursor: pointer;
  font: 900 14px ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: .22em;
}
.demo-toggle[hidden] { display: none; }

.install-card,
.trust {
  border: 3px solid var(--line);
  background: linear-gradient(135deg, rgba(55, 225, 255, .07), transparent 44%), var(--panel);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, .65);
}
.install-card {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(420px, 1.15fr);
  gap: 22px 44px;
  padding: clamp(22px, 4vw, 42px);
  scroll-margin-top: 20px;
}
.install-intro p:last-child,
.section-heading > p:last-child,
.trust > p { color: var(--dim); }
.install-intro p:last-child { max-width: 42ch; }
.safety {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: start;
  border-left: 4px solid var(--amber);
  padding: 1px 0 1px 18px;
  color: var(--dim);
  font-size: 15px;
}
.safety p { margin: 0 0 12px; }
.safety p:last-child { margin-bottom: 0; }
.safety strong, .safety strong span { color: var(--ink); }

esp-web-install-button {
  display: block;
  grid-column: 1 / -1;
  --esp-tools-button-color: var(--cyan);
  --esp-tools-button-text-color: #04121a;
  --esp-tools-button-border-radius: 0;
}
button[slot="activate"] {
  width: 100%;
  min-height: 64px;
  appearance: none;
  border: 0;
  background: var(--cyan);
  color: #04121a;
  cursor: pointer;
  font: 900 17px ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  box-shadow: 0 7px 0 var(--cyan-dark), 0 7px 0 3px #04121a;
  transition: transform .05s, box-shadow .05s, background .1s;
}
button[slot="activate"]:hover { background: #77edff; }
button[slot="activate"]:active {
  transform: translateY(7px);
  box-shadow: 0 0 0 var(--cyan-dark), 0 0 0 3px #04121a;
}
.unsupported, .blocked { display: block; color: var(--amber); font-size: 16px; }

/* ESP Web Tools mounts its dialog at document.body; these local design tokens
   cascade through the component's shadow tree. */
ewt-install-dialog {
  --roboto-font: ui-monospace, monospace !important;
  --md-ref-typeface-plain: ui-monospace, monospace !important;
  --md-ref-typeface-brand: ui-monospace, monospace !important;
  --md-sys-typescale-title-font: ui-monospace, monospace !important;
  --md-sys-typescale-headline-font: ui-monospace, monospace !important;
  --md-sys-color-primary: var(--cyan) !important;
  --md-sys-color-on-primary: #04121a !important;
  --md-sys-color-surface: var(--panel) !important;
  --md-sys-color-surface-container: var(--panel) !important;
  --md-sys-color-surface-container-high: var(--panel) !important;
  --md-sys-color-surface-container-highest: #0e1420 !important;
  --md-sys-color-secondary-container: #12233d !important;
  --md-sys-color-on-secondary-container: var(--ink) !important;
  --md-sys-color-on-surface: var(--ink) !important;
  --md-sys-color-on-surface-variant: var(--dim) !important;
  --md-sys-color-outline: var(--line) !important;
  --md-sys-color-outline-variant: var(--line) !important;
  --text-color: var(--dim) !important;
  --danger-color: var(--red) !important;
  --md-dialog-container-shape: 0 !important;
  --md-sys-shape-corner-large: 0 !important;
  --md-sys-shape-corner-medium: 0 !important;
  --md-sys-shape-corner-small: 0 !important;
  --md-sys-shape-corner-extra-small: 0 !important;
}
.version-row {
  display: flex;
  grid-column: 1 / -1;
  align-items: center;
  gap: 15px;
}
.version-row label { color: var(--dim); font-size: 14px; font-weight: 900; }
.version-row select {
  min-width: 0;
  flex: 1;
  appearance: none;
  border: 3px solid var(--line);
  background: #000;
  color: var(--ink);
  cursor: pointer;
  font: 17px ui-monospace, monospace;
  padding: 9px 12px;
}
.version-row select:focus-visible { border-color: var(--amber); }
.requirements {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--quiet);
  font-size: 14px;
}
kbd, code {
  border: 2px solid var(--line);
  background: #000;
  color: var(--amber);
  font: 800 14px ui-monospace, monospace;
  padding: 2px 5px;
}
.ru-help {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line);
  padding-top: 15px;
}
.ru-help summary,
.faq summary { color: var(--ink); cursor: pointer; font-weight: 900; }
.ru-help > div { color: var(--dim); font-size: 15px; }

.section { padding: 105px 0 0; scroll-margin-top: 20px; }
.section-heading { max-width: 740px; margin-bottom: 32px; }
.section-heading > p:last-child { margin: 15px 0 0; font-size: 18px; }
.mode-grid,
.path-grid,
.feature-grid { display: grid; gap: 18px; }
.mode-grid,
.path-grid { grid-template-columns: 1fr 1fr; }
.mode-card,
.path-grid article,
.feature-grid article {
  border: 3px solid var(--line);
  background: var(--panel);
  padding: 25px;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .55);
}
.mode-card { position: relative; min-height: 245px; padding-right: 78px; }
.mode-card p,
.path-grid p,
.feature-grid p { color: var(--dim); }
.mode-number {
  position: absolute;
  top: 14px;
  right: 19px;
  color: var(--line);
  font-size: 45px;
  font-weight: 900;
}
.mode-tag { margin-top: 28px; color: var(--cyan) !important; font-size: 14px; font-weight: 900; }
.feature-grid { grid-template-columns: repeat(3, 1fr); }
.feature-grid article { box-shadow: none; }
.feature-grid p { margin-bottom: 0; }
.guide-link { margin: 25px 0 0; font-weight: 900; }

.trust {
  display: grid;
  grid-template-columns: .75fr 1.25fr;
  gap: 18px 52px;
  margin-top: 105px;
  padding: clamp(25px, 5vw, 50px);
}
.trust > p { margin: 0; }
.trust .text-links { grid-column: 2; }
.path-grid article { min-height: 220px; }
.path-grid a { display: inline-block; margin-top: 8px; font-weight: 900; }

.faq details { border-top: 2px solid var(--line); padding: 20px 2px; }
.faq details:last-child { border-bottom: 2px solid var(--line); }
.faq summary { font-size: 18px; }
.faq details p { max-width: 78ch; margin: 12px 0 0; color: var(--dim); }

footer {
  margin-top: 110px;
  border-top: 3px solid var(--line);
  padding: 30px 0 52px;
  color: var(--dim);
  font-size: 14px;
}
footer p { margin: 11px 0 0; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: 0; padding-top: 45px; }
  .hero-copy { max-width: 710px; }
  .hero-media { max-width: 720px; }
  .install-card,
  .trust { grid-template-columns: 1fr; }
  .safety,
  .trust .text-links { grid-column: 1; grid-row: auto; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 650px) {
  .site-header { align-items: flex-start; }
  nav { max-width: 185px; gap: 8px 14px; }
  nav a:first-child { display: none; }
  .hero { gap: 38px; padding-bottom: 56px; }
  .hero-actions,
  .button { width: 100%; }
  .install-card { padding: 22px 18px; }
  .version-row { align-items: stretch; flex-direction: column; gap: 7px; }
  .mode-grid,
  .path-grid,
  .feature-grid { grid-template-columns: 1fr; }
  .mode-card { min-height: 0; }
  .section { padding-top: 82px; }
  .trust { margin-top: 82px; padding: 27px 20px; }
  footer { margin-top: 82px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}