:root {
  color-scheme: dark;
  --ink: #f7fbff;
  --muted: #9cb0bc;
  --cyan: #4ff4ff;
  --gold: #ffd36a;
  --pink: #ff5bd6;
  --green: #72ff9d;
  --panel: rgba(8, 14, 22, 0.62);
  --line: rgba(126, 232, 255, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow: hidden;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans SC", sans-serif;
  background:
    radial-gradient(circle at 70% 20%, rgba(255, 91, 214, 0.16), transparent 32%),
    radial-gradient(circle at 24% 78%, rgba(114, 255, 157, 0.12), transparent 28%),
    linear-gradient(135deg, #05070d 0%, #11161a 44%, #170c1a 100%);
  color: var(--ink);
}

a {
  color: inherit;
}

.stage {
  position: relative;
  width: 100vw;
  height: 100vh;
  isolation: isolate;
}

#swordfield,
#camera {
  position: absolute;
  inset: 0;
}

#swordfield {
  width: 100%;
  height: 100%;
  z-index: 1;
}

#camera {
  width: 210px;
  height: 158px;
  top: auto;
  right: 18px;
  bottom: 18px;
  left: auto;
  border: 1px solid rgba(255, 211, 106, 0.35);
  object-fit: cover;
  opacity: 0.38;
  transform: scaleX(-1);
  z-index: 3;
  filter: saturate(1.2) contrast(1.05);
}

.stage::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(rgba(79, 244, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 244, 255, 0.04) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(circle at center, black 30%, transparent 82%);
}

.hud {
  position: absolute;
  z-index: 4;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow:
    0 0 30px rgba(79, 244, 255, 0.12),
    inset 0 0 24px rgba(79, 244, 255, 0.06);
  backdrop-filter: blur(14px);
}

.topbar {
  top: 12px;
  left: 12px;
  right: auto;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  min-height: 48px;
  max-width: calc(100vw - 24px);
  padding: 8px 10px;
}

.topbar.compact .brand {
  max-width: 210px;
}

.tools,
.info-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tool-link,
.info-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.055);
  padding: 0 12px;
  text-decoration: none;
  color: var(--ink);
}

.lang-switch {
  display: grid;
  grid-template-columns: repeat(3, 38px);
  gap: 4px;
}

.lang-switch button {
  min-height: 36px;
  padding: 0;
  font-size: 12px;
}

.lang-switch button.active {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(79, 244, 255, 0.12);
}

.kicker,
h1 {
  margin: 0;
}

.kicker {
  color: var(--cyan);
  font-size: 10px;
  letter-spacing: 0;
}

h1 {
  margin-top: 2px;
  font-size: 22px;
  line-height: 1;
  text-shadow:
    0 0 12px rgba(79, 244, 255, 0.62),
    0 0 38px rgba(255, 91, 214, 0.36);
}

.status,
.readout,
.gesture-map {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
}

.topbar .status {
  gap: 6px;
}

.status span,
.readout span,
.gesture-map span {
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.045);
  padding: 7px 9px;
}

.command {
  left: 50%;
  bottom: 12px;
  display: block;
  width: min(720px, calc(100vw - 24px));
  padding: 8px;
  transform: translateX(-50%);
}

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

.command-panel {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(260px, 1.1fr);
  gap: 8px;
  margin-top: 8px;
}

.more {
  display: inline-grid;
  width: 36px;
  height: 36px;
  place-items: center;
  margin-left: auto;
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--cyan);
  font-size: 18px;
}

button {
  min-height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.07);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
}

button:hover {
  border-color: rgba(79, 244, 255, 0.8);
  box-shadow: 0 0 18px rgba(79, 244, 255, 0.16);
}

.primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 15px;
  color: #061016;
  background: linear-gradient(135deg, var(--cyan), var(--gold));
  font-weight: 800;
}

.glyph {
  font-size: 18px;
}

.modes {
  display: grid;
  grid-template-columns: repeat(4, minmax(48px, 1fr));
  gap: 6px;
}

.mode {
  width: auto;
  padding: 0 8px;
}

.mode.active {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(255, 211, 106, 0.14);
}

.readout b {
  color: var(--green);
}

.gesture-map {
  position: static;
  min-height: 42px;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.command.collapsed:not(:focus-within) .command-panel {
  display: none;
}

@media (max-width: 820px) {
  .topbar {
    left: 10px;
    right: auto;
    max-width: calc(100vw - 20px);
  }

  .topbar {
    align-items: center;
    min-height: 44px;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .tools {
    margin-left: auto;
  }

  .status,
  .gesture-map {
    flex-wrap: wrap;
  }

  .command {
    bottom: 10px;
  }

  .modes {
    flex: 1 1 250px;
  }

  .mode {
    width: auto;
  }

  #camera {
    right: 10px;
    bottom: 78px;
    width: 132px;
    height: 99px;
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: 20px;
  }

  .kicker {
    display: none;
  }

  .topbar .status span:nth-child(1),
  .tools .tool-link {
    display: none;
  }

  .lang-switch {
    grid-template-columns: repeat(3, 32px);
  }

  .command-summary {
    gap: 6px;
  }

  .command-panel {
    grid-template-columns: 1fr;
  }

  .readout span {
    padding: 7px;
  }

  .gesture-map {
    display: flex;
  }

  #camera {
    width: 104px;
    height: 78px;
    bottom: 76px;
  }
}

.info-page {
  overflow: auto;
}

.info-page::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(79, 244, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79, 244, 255, 0.035) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(black, transparent 88%);
}

.info-shell {
  position: relative;
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 36px;
}

.info-hero {
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-bottom: 1px solid var(--line);
}

.info-nav {
  position: absolute;
  top: 24px;
  right: 0;
}

.lead {
  max-width: 700px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

.info-showcase {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: 18px;
  align-items: stretch;
  padding: 24px 0;
}

.screenshot-frame,
.demo-panel,
.info-grid article,
.gesture-guide {
  border: 1px solid var(--line);
  background: rgba(8, 14, 22, 0.66);
  box-shadow: inset 0 0 24px rgba(79, 244, 255, 0.055);
}

.screenshot-frame {
  margin: 0;
  min-height: 360px;
  overflow: hidden;
}

.screenshot-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.demo-panel {
  display: flex;
  flex-direction: column;
  min-height: 360px;
  padding: 12px;
}

.demo-panel iframe {
  flex: 1;
  width: 100%;
  min-height: 320px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: #05070d;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.info-grid article,
.gesture-guide {
  padding: 20px;
}

.info-grid h2,
.gesture-guide h2 {
  margin: 0 0 12px;
  font-size: 20px;
}

.info-grid p,
.info-grid li,
.gesture-guide span,
footer {
  color: var(--muted);
  line-height: 1.65;
}

.info-grid p,
.info-grid ol {
  margin: 0;
}

.info-grid ol {
  padding-left: 20px;
}

.gesture-guide {
  margin-top: 14px;
}

.gesture-guide div {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.gesture-guide span {
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.045);
  padding: 12px;
}

footer {
  padding: 22px 0 4px;
  text-align: center;
}

@media (max-width: 900px) {
  .info-showcase,
  .info-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 620px) {
  .info-shell {
    width: min(100vw - 20px, 1120px);
    padding-top: 12px;
  }

  .info-hero {
    min-height: 360px;
    justify-content: flex-end;
    padding-bottom: 24px;
  }

  .info-nav {
    position: static;
    justify-content: space-between;
    margin-bottom: 42px;
  }

  .lead {
    font-size: 16px;
  }

  .screenshot-frame,
  .demo-panel {
    min-height: 280px;
  }

  .demo-panel iframe {
    min-height: 260px;
  }

  .gesture-guide div {
    grid-template-columns: 1fr;
  }
}