:root {
  color-scheme: dark;
  --ink: #f4faf7;
  --muted: #c6d8d3;
  --paper: #06100f;
  --panel: #0d1b1a;
  --panel-2: #132523;
  --line: rgba(198, 226, 220, 0.2);
  --acid: #79ffb0;
  --acid-deep: #55d8ff;
  --danger: #ff6f7f;
  --sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html {
  background: var(--paper);
  scroll-padding-top: 88px;
}

body {
  background: var(--paper);
  letter-spacing: 0;
}

body::before {
  display: none;
}

.shell {
  width: min(1180px, calc(100% - 48px));
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  column-gap: 34px;
  padding-top: 0;
  padding-bottom: 36px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  grid-column: 1 / -1;
  grid-row: 1;
  min-height: 72px;
  padding: 0;
  border-bottom: 1px solid var(--line);
  background: rgba(5, 15, 16, 0.96);
  backdrop-filter: blur(18px);
}

.brand {
  gap: 12px;
  color: var(--ink);
  font-size: 0.73rem;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-color: var(--line);
  border-radius: 3px;
  background: #0c2223;
  color: var(--acid);
  font-weight: 800;
}

.connection {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.78rem;
}

.dot {
  width: 8px;
  height: 8px;
  background: #ff4054;
  box-shadow: none;
}

.dot.connected {
  background: var(--acid);
  box-shadow: 0 0 12px rgba(121, 255, 176, 0.68);
}

.button {
  min-height: 44px;
  border-radius: 6px;
  border-color: var(--acid);
  background: var(--acid);
  color: #04110d;
  padding: 10px 16px;
  font-family: var(--sans);
  font-size: 0.76rem;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.button:hover:not(:disabled),
.button:focus-visible:not(:disabled) {
  background: #9affc2;
}

.button.ghost {
  border-color: rgba(244, 250, 247, 0.46);
  color: var(--ink);
}

.button.ghost:hover:not(:disabled),
.button.ghost:focus-visible:not(:disabled) {
  border-color: var(--acid);
  background: rgba(121, 255, 176, 0.06);
  color: var(--acid);
}

.button:disabled {
  opacity: 0.42;
}

.hero {
  grid-column: 1 / -1;
  grid-row: 2;
  max-width: none;
  display: grid;
  grid-template-columns: minmax(320px, 0.72fr) minmax(0, 1.28fr);
  gap: 54px;
  align-items: end;
  padding: 38px 0 30px;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  grid-column: 1;
  grid-row: 2;
  max-width: 18ch;
  margin: 0;
  color: var(--ink);
  font-size: clamp(2.15rem, 4vw, 3rem);
  line-height: 1;
  letter-spacing: -0.045em;
}

.eyebrow {
  grid-column: 1;
  grid-row: 1;
  align-self: end;
  color: var(--acid);
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.035em;
}

.hero-copy {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: end;
  max-width: 74ch;
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.android-runtime {
  grid-column: 1 / -1;
  max-width: 820px;
  margin-top: 20px;
  border-color: rgba(121, 255, 176, 0.35);
  border-radius: 6px;
  background: #0c2223;
  font-family: var(--sans);
}

.tabs {
  position: sticky;
  top: 96px;
  align-self: start;
  grid-column: 1;
  grid-row: 3 / span 2;
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 34px 0 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #081514;
  overflow: visible;
}

.tab {
  min-height: 55px;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: center;
  gap: 10px;
  margin: 5px 0;
  padding: 0 13px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.84rem;
  text-align: left;
}

.tab::before {
  color: #829991;
  font: 0.68rem var(--mono);
}

.tab:nth-child(1)::before { content: "01"; }
.tab:nth-child(2)::before { content: "02"; }
.tab:nth-child(3)::before { content: "03"; }
.tab:nth-child(4)::before { content: "04"; }
.tab:nth-child(5)::before { content: "05"; }
.tab:nth-child(6)::before { content: "06"; }

.tab:hover,
.tab:focus-visible {
  color: var(--ink);
  background: rgba(121, 255, 176, 0.05);
}

.tab.active {
  border: 0;
  border-radius: 5px;
  background: var(--acid);
  color: #04110d;
}

.tab.active::before {
  color: #28513a;
}

.panel {
  grid-column: 2;
  grid-row: 3;
  min-width: 0;
  padding-top: 39px;
}

.section-heading {
  align-items: start;
  margin-bottom: 28px;
  padding-bottom: 25px;
  border-bottom: 1px solid var(--line);
}

.section-heading h2 {
  font-size: clamp(2rem, 4.2vw, 3rem);
  line-height: 1;
  letter-spacing: -0.045em;
}

.section-heading p:last-child {
  max-width: 500px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.68;
}

.card,
.preview-card,
.log-card {
  border-color: var(--line);
  border-radius: 6px;
  background: #081514;
}

.image-layout,
.bio-layout,
.qr-layout,
.direct-led-layout,
.gene-layout {
  gap: 16px;
}

.controls-card,
.bio-card,
.qr-controls,
.tool-card,
.command-card,
.console-card {
  padding: 22px;
}

.file-drop {
  border-color: rgba(198, 226, 220, 0.4);
  border-radius: 5px;
  background: #071311;
}

.file-drop:hover,
.file-drop:focus-within {
  border-color: var(--acid);
  background: #0c2223;
}

.control-row label,
.field-label,
legend {
  font-size: 0.8rem;
}

.control-row output,
.field-label span,
.note,
.limit {
  font-family: var(--sans);
}

.note {
  color: #8ca6a0;
  font-size: 0.74rem;
  line-height: 1.6;
}

.note.warning {
  color: #e7d994;
}

.task-note {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 0.78rem;
  line-height: 1.65;
}

.task-note > strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
}

.task-note ol,
.task-note ul {
  margin: 8px 0 12px;
  padding-left: 21px;
}

.technical-details {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.technical-details summary {
  color: var(--cyan);
  cursor: pointer;
  font-weight: 700;
}

.technical-details p {
  margin: 9px 0 0;
}

.preview-top,
.preview-meta,
.log-top {
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 700;
}

.display-wrap {
  background: #050f10;
  border-color: var(--line);
}

.display-wrap canvas {
  box-shadow: 0 0 0 1px #050807;
}

.file-input,
.text-input,
.console-form {
  border-color: var(--line);
  border-radius: 5px;
  background: #071311;
}

.sao-option,
.qr-fields,
.direct-led-control,
.gene-sliders label {
  border-color: var(--line);
  border-radius: 5px;
  background: #0b1b19;
}

.chip-links a,
.command-chip {
  border-color: var(--line);
  border-radius: 5px;
  background: #0b1b19;
  font-family: var(--sans);
  font-size: 0.7rem;
}

.terminal {
  border-color: var(--line);
  border-radius: 5px;
  background: #030a09;
  color: #cfe3dc;
}

.qr-wrap,
.compat-note,
.update-note {
  border-radius: 5px;
}

.compat-note,
.update-note {
  border-color: rgba(215, 255, 99, 0.3);
  background: rgba(215, 255, 99, 0.08);
}

.guide-grid {
  border-color: var(--line);
  border-radius: 6px;
  background: var(--line);
  overflow: hidden;
}

.guide-item {
  background: #081514;
}

.log-card {
  grid-column: 2;
  grid-row: 4;
  margin-top: 34px;
}

footer {
  grid-column: 1 / -1;
  grid-row: 5;
  min-height: 80px;
  align-items: center;
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: #8ca6a0;
  font-family: var(--sans);
  font-size: 0.72rem;
}

footer a {
  color: var(--acid);
  font-family: var(--sans);
  font-size: 0.72rem;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.qr-dialog {
  border-color: var(--acid);
  border-radius: 6px;
}

@media (max-width: 920px) {
  .shell {
    display: block;
  }

  .topbar {
    margin-bottom: 0;
  }

  .hero {
    display: block;
    padding: 42px 0 34px;
  }

  .hero-copy { margin-top: 16px; }

  .hero h1,
  .eyebrow,
  .hero-copy,
  .android-runtime {
    grid-column: auto;
    grid-row: auto;
  }

  .tabs {
    position: static;
    display: flex;
    flex-direction: row;
    gap: 4px;
    margin-top: 28px;
    padding: 0;
    border: 0;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: transparent;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--cyan) transparent;
  }

  .tabs::-webkit-scrollbar {
    display: block;
    height: 4px;
  }

  .tabs::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: var(--cyan);
  }

  .tab {
    min-height: 48px;
    display: block;
    margin: 0;
    padding: 0 14px;
    border: 0;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
  }

  .tab::before {
    display: none;
  }

  .tab.active {
    border-bottom-color: var(--acid);
    border-radius: 0;
    background: transparent;
    color: var(--acid);
  }

  .panel {
    padding-top: 34px;
  }
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 28px, 1180px);
  }

  .topbar {
    min-height: 64px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .connection {
    font-size: 0.65rem;
  }

  .connection .button {
    min-height: 42px;
    font-size: 0.72rem;
  }

  .hero h1 {
    font-size: 2.8rem;
  }

  .section-heading {
    padding-bottom: 20px;
  }

  .section-heading p:last-child {
    margin-top: 14px;
  }

  .image-layout,
  .bio-layout,
  .qr-layout,
  .gene-layout,
  .direct-led-layout {
    grid-template-columns: 1fr;
  }

  footer {
    display: grid;
    gap: 10px;
    align-items: start;
  }
}

@media (max-width: 460px) {
  .shell {
    width: min(100% - 20px, 1180px);
  }

  .brand > span:last-child {
    display: none;
  }

  .hero {
    padding-top: 44px;
  }

  .hero h1 {
    font-size: 2.45rem;
  }

  .hero-copy {
    font-size: 0.9rem;
  }

  .tab {
    padding-right: 11px;
    padding-left: 11px;
    font-size: 0.76rem;
  }
}

@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;
  }
}