:root {
  color-scheme: light;
  --page: #f5f7fb;
  --surface: #ffffff;
  --surface-subtle: #eef2f7;
  --ink: #172033;
  --muted: #5f697b;
  --line: #d9e0e9;
  --brand: #1c5ca8;
  --brand-strong: #164a88;
  --brand-soft: #e5f0fb;
  --green: #16784a;
  --orange: #b95e1c;
  --violet: #7251a7;
  --focus: #1689d4;
  --header: rgba(255, 255, 255, 0.92);
  --shadow: 0 16px 40px rgba(26, 39, 62, 0.12);
  --icon-filter: none;
  --content: 1180px;
  --header-height: 68px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #08111f;
    --surface: #101b2d;
    --surface-subtle: #15233a;
    --ink: #f1f5fb;
    --muted: #a6b2c6;
    --line: #263752;
    --brand: #62b3f5;
    --brand-strong: #8ac7f8;
    --brand-soft: #142c46;
    --green: #62d99a;
    --orange: #f4a261;
    --violet: #b79aeb;
    --focus: #67c5ff;
    --header: rgba(8, 17, 31, 0.92);
    --shadow: 0 18px 48px rgba(0, 0, 0, 0.3);
    --icon-filter: brightness(0) invert(1);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #08111f;
  --surface: #101b2d;
  --surface-subtle: #15233a;
  --ink: #f1f5fb;
  --muted: #a6b2c6;
  --line: #263752;
  --brand: #62b3f5;
  --brand-strong: #8ac7f8;
  --brand-soft: #142c46;
  --green: #62d99a;
  --orange: #f4a261;
  --violet: #b79aeb;
  --focus: #67c5ff;
  --header: rgba(8, 17, 31, 0.92);
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.3);
  --icon-filter: brightness(0) invert(1);
}

:root[data-theme="light"] {
  color-scheme: light;
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  scroll-behavior: smooth;
  background: var(--page);
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

body.dialog-open {
  overflow: hidden;
}

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

a {
  color: var(--brand);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

button,
select {
  font: inherit;
}

button,
a,
select {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  transform: translateY(-160%);
  padding: 9px 13px;
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: var(--header);
  backdrop-filter: blur(16px);
}

.nav-shell {
  width: min(calc(100% - 40px), var(--content));
  min-height: var(--header-height);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand-link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 730;
  text-decoration: none;
}

.brand-link img {
  width: 38px;
  height: 38px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
}

.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--ink);
}

.preferences {
  display: flex;
  align-items: center;
  gap: 8px;
}

.select-control {
  position: relative;
  display: flex;
  align-items: center;
  min-width: 118px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
}

.select-control .icon {
  position: absolute;
  left: 10px;
  width: 17px;
  height: 17px;
  pointer-events: none;
}

.select-control select {
  width: 100%;
  height: 100%;
  border: 0;
  padding: 0 28px 0 34px;
  appearance: none;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-size: 13px;
  font-weight: 650;
}

.select-control::after {
  content: "";
  position: absolute;
  right: 11px;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: translateY(-2px) rotate(45deg);
  pointer-events: none;
}

.icon {
  width: 20px;
  height: 20px;
  filter: var(--icon-filter);
}

main section {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.hero {
  position: relative;
  isolation: isolate;
  min-height: min(76svh, 720px);
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: #08111f;
  background-image: url("../images/screenshots/05-help-overview.png");
  background-position: center;
  background-size: cover;
  color: #ffffff;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background: rgba(4, 10, 18, 0.72);
}

.hero-content {
  width: min(calc(100% - 40px), 900px);
  margin: 0 auto;
  padding: 72px 0 84px;
  text-align: center;
}

.hero-icon {
  width: 92px;
  height: 92px;
  margin: 0 auto 18px;
  filter: drop-shadow(0 12px 22px rgba(0, 0, 0, 0.35));
}

.eyebrow {
  margin: 0 0 8px;
  color: #91d2ff;
  font-size: 14px;
  font-weight: 760;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: 68px;
  line-height: 1.04;
  font-weight: 780;
}

.hero-lead {
  max-width: 760px;
  margin: 20px auto 0;
  color: #d8e3f2;
  font-size: 22px;
  line-height: 1.45;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 30px;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 10px 17px;
  font-weight: 720;
  line-height: 1.2;
  text-decoration: none;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.button:hover:not(:disabled):not([aria-disabled="true"]) {
  transform: translateY(-1px);
}

.button-primary {
  background: #1975c6;
  color: #ffffff;
}

.button-primary:hover {
  background: #2586d7;
}

.button-primary .icon,
.button-hero-secondary .icon,
.button-disabled .icon {
  filter: brightness(0) invert(1);
}

.button-hero-secondary {
  border-color: rgba(255, 255, 255, 0.36);
  background: rgba(8, 17, 31, 0.76);
  color: #ffffff;
}

.button-hero-secondary:hover {
  background: rgba(20, 38, 61, 0.92);
}

.button-disabled {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(31, 42, 58, 0.74);
  color: #c5cfdd;
  cursor: not-allowed;
  opacity: 0.76;
}

.button-badge {
  padding: 3px 6px;
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.13);
  font-size: 11px;
  font-weight: 720;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  margin: 20px 0 0;
  color: #b9c8dc;
  font-size: 13px;
}

.hero-meta a {
  color: #bfe3ff;
}

.signal-band {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.signal-list {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  padding: 20px 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  list-style: none;
}

.signal-list li {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 40px;
  padding: 0 22px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 670;
  text-align: center;
}

.signal-list li + li {
  border-left: 1px solid var(--line);
}

.section {
  padding: 88px 0;
}

.section-alt {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.section-inner {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 44px;
}

.section-heading h2,
.privacy-callout h2,
.legal-header h1 {
  margin: 0;
  color: var(--ink);
  font-size: 38px;
  line-height: 1.18;
}

.section-heading p,
.privacy-callout p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.flow {
  display: grid;
  grid-template-columns: 1fr 56px 1fr 56px 1fr;
  align-items: stretch;
}

.flow-step {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--brand);
  border-radius: 8px;
  background: var(--surface);
}

.flow-step-tunnel {
  border-top-color: var(--green);
}

.flow-step-remote {
  border-top-color: var(--orange);
}

.flow-step .step-icon {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 7px;
  background: var(--surface-subtle);
}

.flow-step h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.3;
}

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

.flow-arrow {
  display: grid;
  place-items: center;
}

.flow-arrow .icon {
  width: 28px;
  height: 28px;
}

.technical-note {
  margin: 28px 0 0;
  padding-left: 18px;
  border-left: 3px solid var(--violet);
  color: var(--muted);
}

.install-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 64px;
  align-items: start;
}

.install-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: install;
}

.install-steps li {
  position: relative;
  min-height: 68px;
  padding: 4px 0 24px 58px;
  counter-increment: install;
}

.install-steps li::before {
  content: counter(install);
  position: absolute;
  left: 0;
  top: 0;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-weight: 760;
}

.install-steps strong {
  display: block;
  margin-bottom: 3px;
  font-size: 18px;
}

.install-steps span {
  color: var(--muted);
}

.requirements {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-subtle);
}

.requirements h3 {
  margin: 0 0 14px;
  font-size: 20px;
}

.requirements ul {
  margin: 0;
  padding-left: 20px;
}

.requirements li + li {
  margin-top: 8px;
}

.checksum {
  margin: 20px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.checksum code {
  display: block;
  margin-top: 5px;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.gallery-item {
  grid-column: span 6;
  margin: 0;
  min-width: 0;
}

.gallery-item:nth-child(3) {
  grid-column: span 4;
}

.gallery-item:nth-child(4),
.gallery-item:nth-child(5) {
  grid-column: span 4;
}

.screenshot-button {
  width: 100%;
  aspect-ratio: 16 / 10;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0;
  background: var(--surface-subtle);
  cursor: zoom-in;
  box-shadow: 0 10px 30px rgba(24, 37, 58, 0.08);
}

.screenshot-button img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.gallery-item figcaption {
  margin-top: 11px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.privacy-band {
  padding: 64px 0;
  background: #10233a;
  color: #ffffff;
}

.privacy-callout {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
}

.privacy-callout > .icon {
  width: 48px;
  height: 48px;
  filter: brightness(0) invert(1);
}

.privacy-callout h2 {
  color: #ffffff;
}

.privacy-callout p {
  color: #c6d5e8;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
  padding: 0;
}

.faq-list summary {
  padding: 20px 34px 20px 0;
  cursor: pointer;
  color: var(--ink);
  font-size: 17px;
  font-weight: 700;
}

.faq-list details p {
  max-width: 850px;
  margin: -5px 0 22px;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.footer-inner {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  padding: 34px 0;
  display: flex;
  justify-content: space-between;
  gap: 32px;
  color: var(--muted);
  font-size: 13px;
}

.footer-inner p {
  max-width: 720px;
  margin: 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 18px;
}

.footer-links a {
  white-space: nowrap;
}

.lightbox {
  width: min(94vw, 1240px);
  max-width: none;
  height: min(90vh, 860px);
  max-height: none;
  border: 1px solid #35445a;
  border-radius: 8px;
  padding: 0;
  background: #07101d;
  color: #ffffff;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.55);
}

.lightbox::backdrop {
  background: rgba(0, 0, 0, 0.76);
}

.lightbox-layout {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr) 58px;
  align-items: center;
}

.lightbox figure {
  min-width: 0;
  margin: 0;
  padding: 58px 8px 24px;
  text-align: center;
}

.lightbox figure img {
  width: 100%;
  height: calc(min(90vh, 860px) - 126px);
  object-fit: contain;
}

.lightbox figcaption {
  margin-top: 12px;
  color: #c6d2e3;
  font-size: 14px;
}

.icon-button {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid #41516a;
  border-radius: 7px;
  background: #101b2d;
  cursor: pointer;
}

.icon-button:hover {
  background: #1a2a42;
}

.icon-button .icon {
  filter: brightness(0) invert(1);
}

.lightbox-close {
  position: absolute;
  z-index: 2;
  top: 14px;
  right: 14px;
}

.lightbox-nav {
  justify-self: center;
}

.legal-main {
  padding-bottom: 88px;
}

.legal-header {
  padding: 74px 0 54px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.legal-header-inner,
.legal-content {
  width: min(calc(100% - 40px), 860px);
  margin: 0 auto;
}

.legal-header .eyebrow {
  color: var(--brand);
}

.legal-header h1 {
  font-size: 46px;
}

.legal-header p {
  margin: 13px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.legal-content {
  padding-top: 54px;
}

.privacy-summary {
  margin-bottom: 44px;
  padding: 24px;
  border-left: 4px solid var(--green);
  background: var(--surface);
}

.privacy-summary strong {
  display: block;
  margin-bottom: 6px;
  font-size: 19px;
}

.privacy-summary p {
  margin: 0;
  color: var(--muted);
}

.legal-section {
  padding: 30px 0;
  border-top: 1px solid var(--line);
}

.legal-section h2 {
  margin: 0 0 12px;
  font-size: 24px;
  line-height: 1.3;
}

.legal-section p,
.legal-section li {
  color: var(--muted);
}

.legal-section p:last-child,
.legal-section ul:last-child {
  margin-bottom: 0;
}

.legal-section code {
  overflow-wrap: anywhere;
  color: var(--ink);
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .preferences {
    margin-left: auto;
  }

  .flow {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .flow-arrow {
    height: 36px;
    transform: rotate(90deg);
  }

  .install-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .gallery-item,
  .gallery-item:nth-child(3),
  .gallery-item:nth-child(4),
  .gallery-item:nth-child(5) {
    grid-column: span 6;
  }
}

@media (max-width: 700px) {
  :root {
    --header-height: 62px;
  }

  .nav-shell {
    width: min(calc(100% - 24px), var(--content));
    gap: 10px;
  }

  .brand-link span {
    display: none;
  }

  .brand-link img {
    width: 36px;
    height: 36px;
  }

  .select-control {
    min-width: 102px;
    height: 36px;
  }

  .select-control select {
    font-size: 12px;
  }

  .hero {
    min-height: 72svh;
  }

  .hero-content {
    width: min(calc(100% - 28px), 900px);
    padding: 48px 0 56px;
  }

  .hero-icon {
    width: 76px;
    height: 76px;
  }

  .hero h1 {
    font-size: 46px;
  }

  .hero-lead {
    font-size: 18px;
  }

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

  .button {
    width: 100%;
  }

  .signal-list {
    width: min(calc(100% - 28px), var(--content));
    grid-template-columns: 1fr;
    padding: 8px 0;
  }

  .signal-list li {
    justify-content: flex-start;
    padding: 10px 4px;
    text-align: left;
  }

  .signal-list li + li {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .section {
    padding: 64px 0;
  }

  .section-inner,
  .privacy-callout,
  .footer-inner,
  .legal-header-inner,
  .legal-content {
    width: min(calc(100% - 28px), var(--content));
  }

  .section-heading {
    margin-bottom: 32px;
  }

  .section-heading h2,
  .privacy-callout h2 {
    font-size: 30px;
  }

  .section-heading p,
  .privacy-callout p {
    font-size: 16px;
  }

  .flow-step {
    padding: 20px;
  }

  .gallery-grid {
    display: flex;
    gap: 14px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 12px;
  }

  .gallery-item,
  .gallery-item:nth-child(3),
  .gallery-item:nth-child(4),
  .gallery-item:nth-child(5) {
    flex: 0 0 88%;
    scroll-snap-align: center;
  }

  .privacy-callout {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .privacy-callout > .icon {
    width: 38px;
    height: 38px;
  }

  .privacy-callout .button {
    grid-column: 1 / -1;
  }

  .footer-inner {
    flex-direction: column;
  }

  .footer-links {
    justify-content: flex-start;
  }

  .lightbox {
    width: 100vw;
    height: 100dvh;
    border: 0;
    border-radius: 0;
  }

  .lightbox-layout {
    grid-template-columns: 48px minmax(0, 1fr) 48px;
  }

  .lightbox figure {
    padding: 58px 0 18px;
  }

  .lightbox figure img {
    height: calc(100dvh - 126px);
  }

  .icon-button {
    width: 38px;
    height: 38px;
  }

  .legal-header {
    padding: 52px 0 40px;
  }

  .legal-header h1 {
    font-size: 36px;
  }
}

@media (max-width: 430px) {
  .preferences {
    gap: 5px;
  }

  .select-control {
    min-width: 92px;
  }

  .select-control .icon {
    left: 8px;
    width: 15px;
    height: 15px;
  }

  .select-control select {
    padding-left: 28px;
    padding-right: 22px;
  }

  .hero h1 {
    font-size: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-header,
  .site-footer,
  .preferences {
    display: none;
  }

  body,
  .legal-header,
  .privacy-summary {
    background: #ffffff;
    color: #000000;
  }

  .legal-main {
    padding: 0;
  }
}