.download-hero {
  min-height: calc(100svh - var(--header-height));
  display: flex;
  align-items: center;
  background:
    linear-gradient(var(--color-grid) var(--line-thin), var(--color-transparent) var(--line-thin)),
    linear-gradient(90deg, var(--color-grid) var(--line-thin), var(--color-transparent) var(--line-thin)),
    var(--color-bg);
  background-size: 32px 32px;
}

.download-hero::after {
  position: absolute;
  inset: auto 0 0;
  height: var(--line-thin);
  background: var(--color-border);
  content: "";
}

.download-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1.18fr);
  gap: clamp(36px, 6vw, 88px);
  align-items: center;
}

.download-hero-copy {
  position: relative;
  z-index: 2;
  min-width: 0;
}

.download-hero-copy h1 {
  max-width: 720px;
  margin-bottom: 22px;
}

.download-hero-copy .lead {
  margin-bottom: 24px;
}

.download-hero-notes {
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  list-style: none;
}

.download-hero-notes li {
  max-width: 100%;
  padding: 7px 10px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  overflow: hidden;
  border: var(--line-thin) solid var(--color-border-soft);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  background: var(--color-paper-glass);
  font-family: var(--font-mono);
  font-size: 10px;
  white-space: nowrap;
}

.route-dot {
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
}

.route-dot-teal {
  background: var(--color-success);
}

.route-dot-amber {
  background: var(--color-accent);
}

.route-dot-coral {
  background: var(--color-error);
}

.package-spectrum {
  position: relative;
  min-width: 0;
  min-height: 510px;
  overflow: hidden;
  border: var(--line-thin) solid var(--color-border);
  border-radius: var(--radius-small);
  background:
    linear-gradient(var(--color-grid-strong) var(--line-thin), var(--color-transparent) var(--line-thin)),
    linear-gradient(90deg, var(--color-grid-strong) var(--line-thin), var(--color-transparent) var(--line-thin)),
    var(--color-panel-glass);
  background-size: 26px 26px;
  box-shadow: var(--shadow-paper);
}

.package-spectrum::before {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 92px;
  height: 92px;
  border: var(--line-thin) dashed var(--color-border);
  border-radius: var(--radius-pill);
  content: "";
}

.package-spectrum::after {
  position: absolute;
  top: 69px;
  right: 10px;
  width: 120px;
  height: var(--line-thin);
  background: var(--color-border-soft);
  transform: rotate(-24deg);
  content: "";
}

.spectrum-label {
  position: absolute;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.spectrum-label-input {
  top: 160px;
  left: 24px;
}

.spectrum-line {
  position: absolute;
  z-index: 2;
  height: 3px;
  transform-origin: left center;
}

.spectrum-line-input {
  top: 211px;
  left: 0;
  width: 42%;
  background: var(--color-incoming);
  transform: rotate(-7deg);
}

.spectrum-prism {
  position: absolute;
  top: 104px;
  left: 34%;
  z-index: 3;
  width: 190px;
  height: 260px;
  border: var(--line-medium) solid var(--color-glass-edge);
  background:
    linear-gradient(135deg, var(--color-glass-light), var(--color-transparent)),
    var(--color-glass);
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  filter: drop-shadow(0 18px 18px var(--color-shadow-soft));
}

.spectrum-line-a,
.spectrum-line-b,
.spectrum-line-c {
  left: 57%;
  width: 38%;
}

.spectrum-line-a {
  top: 225px;
  background: var(--color-accent);
  transform: rotate(-19deg);
}

.spectrum-line-b {
  top: 250px;
  background: var(--color-success);
  transform: rotate(2deg);
}

.spectrum-line-c {
  top: 275px;
  background: var(--color-error);
  transform: rotate(23deg);
}

.spectrum-target {
  position: absolute;
  right: 20px;
  z-index: 4;
  width: 145px;
  padding: 11px 13px;
  border: var(--line-thin) solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-panel);
  box-shadow: var(--shadow-paper);
}

.spectrum-target span {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.08em;
}

.spectrum-target strong {
  display: block;
  font-size: 12px;
  line-height: 1.3;
}

.spectrum-target-a {
  top: 134px;
  border-left: 4px solid var(--color-accent);
}

.spectrum-target-a span {
  color: var(--color-accent-dark);
}

.spectrum-target-b {
  top: 230px;
  border-left: 4px solid var(--color-success);
}

.spectrum-target-b span {
  color: var(--color-success);
}

.spectrum-target-c {
  top: 326px;
  border-left: 4px solid var(--color-error);
}

.spectrum-target-c span {
  color: var(--color-error);
}

.spectrum-caption {
  position: absolute;
  right: 22px;
  bottom: 20px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.preflight-panel {
  background:
    linear-gradient(var(--color-grid) var(--line-thin), var(--color-transparent) var(--line-thin)),
    var(--color-panel);
  background-size: 100% 32px;
}

.preflight-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
  list-style: none;
}

.preflight-list li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.preflight-index {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: var(--line-thin) solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-accent-dark);
  background: var(--color-amber-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

.preflight-list h3 {
  margin-bottom: 6px;
  font-size: 20px;
}

.preflight-list p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 14px;
}

.platform-tabs {
  margin-top: 40px;
}

.platform-tabs .tab-list {
  position: sticky;
  top: calc(var(--header-height) + 10px);
  z-index: 18;
  box-shadow: var(--shadow-control);
}

.platform-intro {
  margin-bottom: 26px;
  padding: clamp(22px, 4vw, 34px);
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(420px, 1.2fr);
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
  border: var(--line-thin) solid var(--color-border);
  border-radius: var(--radius-small);
  background: var(--color-panel-soft);
}

.platform-intro h3 {
  margin-top: 8px;
}

.platform-intro p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.platform-requirements {
  background: var(--color-panel);
}

.platform-requirements .data-table {
  min-width: 520px;
}

.download-card-title p {
  line-height: 1.75;
}

.download-card .client-icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
}

.download-card .version-slot:not(:empty) {
  margin-top: 13px;
  display: inline-flex;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.download-grid-single {
  grid-template-columns: minmax(0, 680px);
}

.core-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.58fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}

.core-heading .callout {
  margin-block: 0;
}

.core-table {
  margin-top: 34px;
}

.core-table .data-table {
  min-width: 920px;
}

.core-link {
  display: inline-flex;
  min-height: 34px;
  padding: 0 12px;
  align-items: center;
  border: var(--line-thin) solid var(--color-accent);
  border-radius: var(--radius-small);
  color: var(--color-accent-dark);
  background: var(--color-amber-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

.core-link:hover {
  color: var(--color-panel);
  background: var(--color-accent);
}

.core-notes {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.core-notes .paper-card p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.install-records {
  margin-top: 26px;
}

.install-records .chapter-sample {
  background:
    linear-gradient(var(--color-grid) var(--line-thin), var(--color-transparent) var(--line-thin)),
    var(--color-panel);
  background-size: 100% 28px;
}

.sample-checklist {
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 11px;
  list-style: none;
}

.sample-checklist li {
  position: relative;
  padding-left: 20px;
  color: var(--color-text-muted);
  font-size: 13px;
}

.sample-checklist li::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 8px;
  height: var(--line-medium);
  background: var(--color-success);
  content: "";
}

.install-links {
  margin-top: 34px;
  padding-top: 24px;
  border-top: var(--line-thin) solid var(--color-border-soft);
}

@media (max-width: 1040px) {
  .download-hero-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
    gap: 32px;
  }

  .package-spectrum {
    min-height: 460px;
  }

  .spectrum-prism {
    left: 29%;
    width: 170px;
    height: 235px;
  }

  .platform-intro {
    grid-template-columns: minmax(0, 1fr);
  }

  .core-heading {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 800px) {
  .download-hero {
    min-height: auto;
  }

  .download-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .package-spectrum {
    min-height: 430px;
  }

  .spectrum-prism {
    left: 34%;
  }
}

@media (max-width: 640px) {
  .package-spectrum {
    min-height: 390px;
  }

  .spectrum-label-input {
    top: 118px;
    left: 14px;
  }

  .spectrum-line-input {
    top: 168px;
    width: 39%;
  }

  .spectrum-prism {
    top: 82px;
    left: 27%;
    width: 132px;
    height: 190px;
  }

  .spectrum-line-a,
  .spectrum-line-b,
  .spectrum-line-c {
    left: 52%;
    width: 44%;
  }

  .spectrum-line-a {
    top: 178px;
  }

  .spectrum-line-b {
    top: 198px;
  }

  .spectrum-line-c {
    top: 218px;
  }

  .spectrum-target {
    right: 10px;
    width: 118px;
    padding: 8px 9px;
  }

  .spectrum-target strong {
    font-size: 10px;
  }

  .spectrum-target-a {
    top: 94px;
  }

  .spectrum-target-b {
    top: 168px;
  }

  .spectrum-target-c {
    top: 242px;
  }

  .spectrum-caption {
    right: 12px;
    bottom: 12px;
    left: 12px;
    text-align: right;
  }

  .preflight-list li {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
  }

  .preflight-index {
    width: 40px;
    height: 40px;
  }

  .platform-tabs {
    margin-top: 28px;
  }

  .platform-intro {
    padding: 20px;
  }

  .download-card-head {
    gap: 12px;
  }

  .download-card .client-icon {
    width: 48px;
    height: 48px;
  }

  .download-actions .button {
    flex: 1 1 160px;
  }

  .core-notes {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 390px) {
  .package-spectrum {
    min-height: 360px;
  }

  .spectrum-prism {
    left: 23%;
    width: 112px;
    height: 168px;
  }

  .spectrum-target {
    width: 104px;
  }

  .spectrum-target strong {
    font-size: 9px;
  }

  .download-card-head {
    align-items: flex-start;
  }
}