@font-face {
  font-family: 'Windows 3.1 System';
  src: url('assets/fonts/doom/windows31-system.woff2') format('woff2');
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
}
:root {
  --vb-black: #090607;
  --vb-red: #ff4a55;
  --vb-cream: #f2dfdf;
  --vb-muted: #bd999e;
  --vb-line: #67232e;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  background: var(--vb-black);
  color: var(--vb-cream);
  font:
    400 18px/1.6 'Windows 3.1 System',
    sans-serif;
}
button,
a {
  touch-action: manipulation;
}
button {
  font: inherit;
  cursor: pointer;
}
a {
  color: inherit;
}
img {
  max-width: 100%;
  height: auto;
  image-rendering: pixelated;
}
svg {
  display: block;
  max-width: 100%;
}
[hidden] {
  display: none !important;
}
button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 2px solid #ffc0b4;
  outline-offset: 5px;
}
.skip-link {
  position: fixed;
  z-index: 11000;
  top: 8px;
  left: 15px;
  background: #fff;
  color: #111;
  padding: 8px 14px;
  transform: translateY(-160%);
}
.skip-link:focus {
  transform: none;
}
.vb-page {
  position: relative;
  isolation: isolate;
  overflow: clip;
}
.vb-space {
  position: fixed;
  inset: var(--forge-header-height) 0 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(#09060780, #09060780),
    url('assets/red-viper/pixel-tunnel.png') center/cover no-repeat;
}
.vb-space:before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, #090607a8, transparent 65%),
    linear-gradient(0deg, #09060770, transparent);
}
.vb-space:after {
  content: '';
  position: absolute;
  inset: 0;
  background: url('assets/red-viper/pixel-stars.png') repeat;
  background-size: 900px 563px;
  animation: vb-star-drift 90s linear infinite;
  opacity: 0.65;
}
@keyframes vb-star-drift {
  to {
    background-position: 120px -563px;
  }
}
.vb-hero,
.vb-chapter,
.vb-footer {
  width: min(100% - 112px, 1280px);
  margin-inline: auto;
}
.vb-hero {
  padding-top: 28px;
}
.vb-system-line {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--vb-line);
  padding-bottom: 18px;
  color: #c66b76;
  font-size: 12px;
  letter-spacing: 1px;
}
.vb-hero-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  align-items: center;
  gap: 70px;
  min-height: 520px;
  padding: 50px 0;
}
.vb-kicker,
.vb-file,
.vb-chapter-heading > span {
  display: block;
  font-size: 12px;
  letter-spacing: 1.4px;
  color: #e78790;
  margin: 0 0 22px;
}
.vb-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
}
.vb-led {
  width: 6px;
  height: 6px;
  background: #ff5e69;
  box-shadow: 0 0 12px #ff5365;
}
.vb-hero h1 {
  font:
    400 clamp(46px, 4.5vw, 66px)/1.05 'Windows 3.1 System',
    sans-serif;
  letter-spacing: -1.5px;
  margin: 0 0 25px;
  color: #ffe9e5;
}
.vb-hero-intro {
  max-width: 455px;
  color: var(--vb-muted);
  font-size: 20px;
  line-height: 1.55;
  margin: 0 0 32px;
}
.vb-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 22px;
}
.vb-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  background: #ec3949;
  border: 1px solid #ff7780;
  box-shadow:
    inset 0 2px 0 #ffabb544,
    0 4px 0 #641823;
  padding: 11px 20px;
  text-decoration: none;
  color: #fff0e8;
  font-size: 16px;
  line-height: 1.5;
  transition:
    background 0.2s,
    transform 0.2s;
}
.vb-button:hover {
  background: #ff5260;
  transform: translateY(-2px);
}
.vb-text-link {
  text-decoration: none;
  font-size: 16px;
  border-bottom: 1px solid #84323e;
  padding-block: 5px;
  color: #dfb8bf;
  transition: color 0.2s;
}
.vb-text-link:hover {
  color: #fff1e8;
}
.vb-brand-panel {
  position: relative;
  margin: 0;
  min-width: 0;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px 12px 0;
}
.vb-brand-screen {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 25px;
  padding: 12px 0 25px;
}
.vb-brand-screen:before {
  content: '';
  position: absolute;
  inset: 0 -15px;
  z-index: -1;
  background: radial-gradient(ellipse, #ab183826, transparent 65%);
}
.vb-brand-emblem {
  width: 270px;
  max-width: 65%;
  filter: drop-shadow(0 0 22px #d028292b);
}
.vb-brand-wordmark {
  width: 100%;
  max-width: 530px;
}
.vb-brand-panel figcaption {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 24px;
  color: #c5727e;
  font-size: 10px;
  letter-spacing: 1.6px;
}
.vb-brand-panel figcaption span {
  color: #987077;
}
.vb-hero-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 25px;
  border-block: 1px solid var(--vb-line);
  padding: 18px 0;
  font-size: 10px;
  line-height: 1.6;
  letter-spacing: 1px;
  color: #ac7882;
}
.vb-hero-foot b {
  font-weight: 400;
  color: #ddb4ba;
}
.vb-hero-foot > :last-child {
  text-align: right;
}
.vb-spectrum {
  display: flex;
  gap: 5px;
}
.vb-spectrum i {
  width: 26px;
  height: 5px;
  background: #ff655b;
}
.vb-spectrum i:nth-child(2) {
  background: #f4bc61;
}
.vb-spectrum i:nth-child(3) {
  background: #dfdd6f;
}
.vb-spectrum i:nth-child(4) {
  background: #8bdba1;
}
.vb-spectrum i:nth-child(5) {
  background: #7fc8ec;
}
.vb-spectrum i:nth-child(6) {
  background: #bb9fe7;
}
.vb-chapter {
  padding-block: 70px;
  border-bottom: 1px solid var(--vb-line);
}
.vb-chapter-heading {
  margin-bottom: 32px;
}
.vb-chapter-heading > span {
  margin-bottom: 14px;
}
.vb-chapter h2 {
  font:
    400 clamp(30px, 3.2vw, 44px)/1.15 'Windows 3.1 System',
    sans-serif;
  letter-spacing: -0.7px;
  margin: 0 0 15px;
}
.vb-chapter-heading > p {
  margin: 0;
  color: var(--vb-muted);
  font-size: 18px;
}
.vb-features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 38px;
}
.vb-features article {
  position: relative;
  border-top: 1px solid #8e3440;
  padding: 25px 0 0;
}
.vb-features article > img {
  width: 52px;
  height: 52px;
  float: right;
  margin-left: 15px;
}
.vb-features .vb-file {
  font-size: 10px;
  margin-bottom: 15px;
  color: #9e6571;
}
.vb-features h3,
.vb-origins h3 {
  font-weight: 400;
  font-size: 25px;
  line-height: 1.2;
  margin: 0 0 14px;
}
.vb-features p,
.vb-origin-grid p {
  margin: 0;
  color: var(--vb-muted);
  font-size: 17px;
  line-height: 1.65;
}
.vb-small-note {
  font-size: 12px;
  line-height: 1.7;
  color: #a17e87;
  margin: 26px 0 0;
  max-width: 1080px;
}
.vb-small-note a {
  text-underline-offset: 3px;
  color: #d49aa4;
}
.vb-gallery-stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: start;
}
.vb-gallery-frame {
  position: relative;
  border: 1px solid #682e3b;
  background: radial-gradient(ellipse at 50% 45%, #60182966, transparent 70%), #10080be6;
  box-shadow:
    inset 0 0 0 5px #3d172028,
    0 18px 55px #0005;
}
.vb-frame-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  border-bottom: 1px solid #622332;
  background: #30101b;
  padding: 12px 18px;
  color: #ecc2c9;
  font-size: 15px;
  line-height: 1.4;
}
.vb-frame-bar > :last-child {
  font-size: 10px;
  color: #cb7d8c;
}
.vb-hardware {
  display: block;
  width: min(420px, 92%);
  margin: 0 auto;
  border: 0;
  background: none;
  color: #b67986;
  padding: 25px 0 0;
}
.vb-hardware > svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 13px 13px #0009);
  image-rendering: auto;
}
.vb-hardware > svg svg {
  image-rendering: pixelated;
}
.vb-hardware > span {
  display: block;
  padding: 17px 0 20px;
  font-size: 10px;
  letter-spacing: 1.5px;
}
.vb-gallery-controls {
  min-width: 0;
  padding-top: 12px;
}
.vb-gallery-controls > .vb-file {
  margin-bottom: 14px;
  font-size: 10px;
}
.vb-gallery-caption {
  font-size: 17px;
  line-height: 1.6;
  min-height: 83px;
  margin: 0 0 24px;
  color: #c6a5ad;
}
.vb-scene-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 15px 10px;
}
.vb-scene {
  min-width: 0;
  background: #170c10;
  border: 1px solid #512331;
  color: #b58d97;
  padding: 4px;
  text-align: left;
  transition:
    border-color 0.2s,
    background 0.2s,
    transform 0.2s;
}
.vb-scene:hover {
  border-color: #cd626f;
  transform: translateY(-2px);
}
.vb-scene img {
  display: block;
  width: 100%;
  aspect-ratio: 5/3;
  object-fit: cover;
}
.vb-scene > span {
  display: block;
  font-size: 10px;
  line-height: 1.5;
  padding: 9px 3px 5px;
  min-height: 44px;
}
.vb-scene[aria-pressed='true'] {
  border-color: #ff6c78;
  box-shadow: 0 0 0 1px #ff6c7833;
  background: #3e141f;
  color: #ffe0d8;
}
.vb-gallery-browse {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
  margin-top: 25px;
  padding-top: 18px;
  border-top: 1px solid #642732;
  font-size: 10px;
  letter-spacing: 1px;
  color: #ad6e7d;
}
.vb-gallery-browse > div {
  display: flex;
  gap: 10px;
}
.vb-gallery-browse button {
  width: 38px;
  height: 34px;
  color: #eec7cf;
  border: 1px solid #934252;
  background: #260f19;
  font-size: 20px;
}
.vb-gallery-browse button:hover {
  background: #4c1926;
}
.vb-origin-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 38px;
}
.vb-origin-grid article {
  padding-top: 24px;
  border-top: 1px solid #8e3440;
}
.vb-origin-number {
  display: block;
  color: #b55666;
  font-size: 13px;
  margin-bottom: 18px;
}
.vb-origin-grid h3 {
  font-size: 28px;
}
.vb-origin-grid p {
  margin-bottom: 22px;
}
.vb-progress {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
  align-items: center;
}
.vb-progress > div > p:not(.vb-file) {
  font-size: 18px;
  color: var(--vb-muted);
  max-width: 480px;
}
.vb-progress-display {
  border: 1px solid #873441;
  background: linear-gradient(125deg, #431422b0, #150a10e6);
  padding: 28px 32px;
  box-shadow: inset 0 0 0 5px #461a282b;
}
.vb-progress-display > span {
  font-size: 10px;
  letter-spacing: 1px;
  color: #c88e9a;
}
.vb-progress-display > strong {
  display: block;
  font-weight: 400;
  font-size: 100px;
  line-height: 1.2;
  color: #ff727c;
  letter-spacing: -5px;
  margin: 10px 0;
}
.vb-progress-display > strong > span {
  font-size: 40px;
  letter-spacing: 0;
}
.vb-progress-meter {
  height: 12px;
  padding: 2px;
  border: 1px solid #99475a;
  background: #12090e;
}
.vb-progress-meter > span {
  display: block;
  height: 100%;
  background: repeating-linear-gradient(90deg, #ff6c79 0 7px, #341320 7px 10px);
}
.vb-progress-display > p {
  font-size: 10px;
  letter-spacing: 1px;
  color: #c78896;
  margin: 15px 0 0;
}
.vb-faq {
  max-width: 960px;
}
.vb-faq details {
  padding: 20px 0;
  border-bottom: 1px solid #572431;
}
.vb-faq summary {
  font-size: 21px;
  line-height: 1.4;
  cursor: pointer;
  color: #e2b7c1;
}
.vb-faq details p {
  font-size: 17px;
  color: var(--vb-muted);
  max-width: 800px;
  margin: 15px 0 0;
}
.vb-faq > .vb-button {
  margin-top: 30px;
}
.vb-footer {
  display: flex;
  align-items: center;
  gap: 28px;
  padding-block: 25px 35px;
  font-size: 11px;
  color: #b07585;
}
.vb-footer > span {
  margin-right: auto;
}
.vb-footer a {
  text-decoration: none;
}
#vb-lightbox {
  padding: 0;
  border: 1px solid #ad3b50;
  background: #070405;
  color: #f1d9d9;
  width: min(1050px, 94vw, calc(166.6667dvh - 200px));
  max-height: 94dvh;
  overflow: auto;
}
#vb-lightbox::backdrop {
  background: #050205e8;
}
#vb-lightbox-close {
  background: transparent;
  border: 1px solid #b16b7c;
  color: #ffe2e2;
  font-size: 25px;
  width: 36px;
  height: 34px;
  line-height: 1;
}
#vb-lightbox-image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5/3;
  image-rendering: pixelated;
}
#vb-lightbox > p {
  font-size: 10px;
  color: #b17482;
  margin: 14px 18px;
}
@media (min-width: 1500px) {
  .vb-hero-layout {
    min-height: 580px;
  }
  .vb-brand-emblem {
    width: 300px;
  }
  .vb-brand-screen {
    gap: 30px;
  }
}
@media (max-width: 1100px) {
  .vb-hero,
  .vb-chapter,
  .vb-footer {
    width: calc(100% - 70px);
  }
  .vb-hero-layout {
    gap: 35px;
    min-height: 480px;
  }
  .vb-hero h1 {
    font-size: 50px;
  }
  .vb-brand-emblem {
    width: 235px;
  }
  .vb-brand-panel figcaption {
    font-size: 9px;
    gap: 6px 12px;
  }
  .vb-features,
  .vb-origin-grid {
    gap: 26px;
  }
  .vb-gallery-stage {
    gap: 25px;
  }
  .vb-gallery-caption {
    font-size: 16px;
  }
  .vb-scene-rail {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .vb-progress {
    gap: 50px;
  }
}
@media (max-width: 760px) {
  .vb-hero,
  .vb-chapter,
  .vb-footer {
    width: calc(100% - 40px);
  }
  .vb-hero {
    padding-top: 22px;
  }
  .vb-system-line {
    font-size: 9px;
    letter-spacing: 0.7px;
    gap: 10px;
    padding-bottom: 15px;
  }
  .vb-hero-layout {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 38px 0 32px;
    min-height: 0;
  }
  .vb-hero h1 {
    font-size: 48px;
  }
  .vb-hero-intro {
    font-size: 18px;
    margin-bottom: 25px;
    max-width: 520px;
  }
  .vb-kicker {
    font-size: 10px;
    margin-bottom: 18px;
  }
  .vb-actions {
    gap: 20px;
  }
  .vb-button,
  .vb-text-link {
    font-size: 15px;
  }
  .vb-brand-panel {
    padding: 0 10px 10px;
  }
  .vb-brand-screen {
    gap: 20px;
    padding-top: 0;
  }
  .vb-brand-emblem {
    width: 208px;
    max-width: 62%;
  }
  .vb-brand-wordmark {
    max-width: 400px;
  }
  .vb-brand-panel figcaption {
    font-size: 8px;
    letter-spacing: 1px;
  }
  .vb-hero-foot {
    font-size: 8px;
    letter-spacing: 0.4px;
    gap: 12px;
  }
  .vb-spectrum {
    gap: 3px;
  }
  .vb-spectrum i {
    width: 10px;
    height: 4px;
  }
  .vb-chapter {
    padding-block: 46px;
  }
  .vb-chapter h2 {
    font-size: 32px;
  }
  .vb-chapter-heading > p {
    font-size: 17px;
  }
  .vb-features {
    grid-template-columns: 1fr;
    gap: 25px;
  }
  .vb-features article {
    padding-top: 22px;
  }
  .vb-features h3 {
    font-size: 25px;
  }
  .vb-gallery-stage {
    grid-template-columns: 1fr;
    gap: 25px;
  }
  .vb-hardware {
    width: min(370px, 90%);
    padding-top: 22px;
  }
  .vb-gallery-controls {
    padding: 0;
  }
  .vb-gallery-caption {
    min-height: 0;
    font-size: 16px;
    margin-bottom: 22px;
  }
  .vb-scene-rail {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px 7px;
  }
  .vb-scene > span {
    font-size: 9px;
    padding: 7px 1px 3px;
    min-height: 37px;
  }
  .vb-gallery-browse {
    margin-top: 18px;
  }
  .vb-origin-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .vb-origin-number {
    float: right;
    margin-top: 6px;
  }
  .vb-origin-grid h3 {
    font-size: 28px;
  }
  .vb-progress {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .vb-progress-display {
    padding: 25px;
  }
  .vb-progress-display > strong {
    font-size: 90px;
  }
  .vb-small-note {
    font-size: 11px;
  }
  .vb-faq summary {
    font-size: 19px;
  }
  .vb-footer {
    flex-wrap: wrap;
    gap: 18px;
    font-size: 10px;
  }
  .vb-footer > span {
    width: 100%;
  }
  #vb-lightbox {
    width: 94vw;
  }
}
@media (max-width: 360px) {
  .vb-hero,
  .vb-chapter,
  .vb-footer {
    width: calc(100% - 32px);
  }
  .vb-hero h1 {
    font-size: 43px;
  }
  .vb-system-line {
    font-size: 8px;
  }
  .vb-hero-foot {
    font-size: 7px;
  }
  .vb-actions {
    gap: 17px;
  }
  .vb-button,
  .vb-text-link {
    font-size: 14px;
  }
  .vb-scene-rail {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .vb-space:after {
    animation: none;
  }
  .vb-button,
  .vb-scene {
    transition: none;
  }
}

/* Preserve fine menu strokes at small sizes; the expanded viewer stays crisp. */
.vb-hardware > svg svg,
.vb-scene img {
  image-rendering: auto;
}
.vb-space {
  background: #090607 url('assets/red-viper/pixel-tunnel.png') center/cover no-repeat;
}
.vb-space:before {
  background: #090607;
  opacity: var(--vb-depth, 0.16);
}
.vb-hero h1 > span {
  color: #ff9aa1;
}
.vb-brand-screen:before {
  opacity: 0.8;
  inset: -40px -50px;
  background: radial-gradient(ellipse, #000e 20%, #000b 43%, transparent 73%);
}
@media (min-width: 1101px) {
  .vb-hero-layout {
    grid-template-columns: 0.9fr 1.2fr;
    gap: 40px;
    min-height: 580px;
  }
  .vb-brand-emblem {
    width: 380px;
    max-width: 74%;
  }
  .vb-brand-wordmark {
    max-width: 650px;
  }
  .vb-brand-screen {
    gap: 25px;
  }
  .vb-hero h1 {
    font-size: clamp(48px, 4.2vw, 62px);
  }
}

/* Compact phone rhythm and comfortable touch targets. */
@media (max-width: 600px) {
  .vb-hero-layout {
    padding-top: 28px;
    gap: 24px;
  }
  .vb-hero h1 {
    font-size: clamp(36px, 10vw, 43px);
    line-height: 1.15;
  }
  .vb-hero-intro {
    font-size: 16px;
    line-height: 1.65;
    margin-bottom: 20px;
  }
  .vb-kicker {
    margin-bottom: 14px;
  }
  .vb-brand-emblem {
    width: 185px;
  }
  .vb-actions {
    gap: 12px;
    flex-wrap: wrap;
  }
  .vb-button,
  .vb-text-link {
    font-size: 14px;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  .vb-chapter {
    padding-block: 36px;
  }
  .vb-chapter h2 {
    font-size: 29px;
  }
  .vb-features h3 {
    font-size: 23px;
  }
  .vb-features p,
  .vb-origin-grid p,
  .vb-faq p {
    font-size: 16px;
  }
  .vb-hardware {
    width: min(280px, 90%);
  }
  .vb-scene-rail {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .vb-gallery-browse button {
    min-width: 44px;
    min-height: 44px;
  }
}

@media (max-width: 760px), (max-height: 600px) {
  #vb-lightbox {
    max-height: calc(100svh - 24px);
    overflow: auto;
  }
  #vb-lightbox-image {
    max-height: calc(100svh - 150px);
    width: 100%;
    height: auto;
  }
  #vb-lightbox-close {
    min-width: 44px;
    min-height: 44px;
  }
}