:root {
  color-scheme: dark;
  --bg: #05060a;
  --bg-2: #0b0d12;
  --panel: rgba(14, 17, 24, 0.94);
  --panel-2: rgba(20, 24, 33, 0.96);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(80, 145, 255, 0.35);
  --text: #f2f4f8;
  --muted: #a5adbb;
  --quiet: #6a7382;
  --accent: #3f87ff;
  --accent-soft: rgba(63, 135, 255, 0.18);
  --ok: #3ad08c;
  --bad: #ff697b;
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top center, rgba(63, 135, 255, 0.09), transparent 24%),
    linear-gradient(180deg, #05060a 0%, #06080d 100%);
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  line-height: 1.45;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.35;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent 80%);
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
label,
select {
  user-select: none;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.hidden {
  display: none !important;
}

.app-shell {
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

.gate-backdrop {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(3, 4, 6, 0.82);
  backdrop-filter: blur(24px);
}

.gate-panel {
  width: min(460px, 100%);
  display: grid;
  gap: 14px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(12, 15, 21, 0.98);
  box-shadow: var(--shadow);
}

.gate-panel h1,
.connect-panel h2,
.scanner-panel h2,
.studio-title h2 {
  margin: 0;
  letter-spacing: 0;
}

.gate-copy,
.lead,
.tag-meta,
.gesture-note,
.mini-copy,
.scanner-status,
.connect-foot {
  margin: 0;
  color: var(--muted);
}

.gate-copy.quiet {
  color: var(--quiet);
}

.check-row {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel-2);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 9, 13, 0.86);
  backdrop-filter: blur(18px);
}

.brand,
.topbar-side,
.preview-top,
.studio-header-actions,
.scanner-actions,
.preview-actions,
.preview-footer,
.section-line {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  border: 2px solid #fff;
  flex: 0 0 auto;
  position: relative;
}

.brand-mark::after {
  content: "";
  position: absolute;
  right: -6px;
  top: 4px;
  width: 5px;
  height: 6px;
  border-top: 2px solid var(--accent);
  border-bottom: 2px solid #7bc2ff;
}

.brand-copy {
  min-width: 0;
}

.brand-name {
  font-size: 14px;
  font-weight: 760;
}

.brand-sub {
  color: var(--quiet);
  font-size: 11px;
}

.topbar-side {
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.screen {
  padding: 16px;
}

.connect-screen,
.scanner-screen {
  min-height: calc(100vh - 66px);
  display: grid;
  place-items: center;
}

.connect-panel,
.scanner-panel,
.panel {
  width: min(100%, 680px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.connect-panel,
.scanner-panel {
  display: grid;
  gap: 16px;
  padding: 20px;
}

.connect-panel {
  max-width: 420px;
}

.known-devices,
.known-device-list,
.control-block,
.advanced-panel,
.slider-row,
.studio-shell {
  display: grid;
  gap: 12px;
}

.known-device-list {
  gap: 8px;
}

.device-chip {
  width: 100%;
  min-height: 46px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-2);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
}

.device-chip:hover {
  border-color: var(--line-strong);
}

.device-chip-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.device-chip-meta {
  flex: 0 0 auto;
  color: var(--quiet);
  font-size: 12px;
}

.eyebrow,
.section-title,
.slider-row label,
.advanced-panel summary,
.control-block > label {
  color: var(--quiet);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 6px;
}

.section-line {
  justify-content: space-between;
  gap: 12px;
}

.preview-top {
  justify-content: space-between;
  gap: 14px;
}

.studio-header-actions,
.scanner-actions,
.preview-actions,
.preview-footer,
.control-row.split {
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.studio-shell {
  width: min(100%, 1080px);
  margin: 0 auto;
}

.panel {
  padding: 16px;
}

.preview-stage {
  position: relative;
  border: 1px solid rgba(15, 23, 42, 0.14);
  border-radius: 20px;
  background: #eef2f6;
  overflow: hidden;
  touch-action: none;
}

#previewCanvas {
  display: block;
  width: 100%;
  height: auto;
  background: #eef2f6;
  image-rendering: pixelated;
}

.empty-state {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  gap: 4px;
  padding: 20px;
  text-align: center;
  color: #0f172a;
  background: linear-gradient(180deg, rgba(245, 247, 250, 0.9), rgba(234, 239, 245, 0.84));
  pointer-events: none;
}

.empty-state strong {
  font-size: 16px;
}

.empty-state span {
  max-width: 26ch;
  color: #475569;
  font-size: 13px;
}

.gesture-note {
  font-size: 12px;
}

.scanner-stage {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #000;
  aspect-ratio: 4 / 3;
}

#scannerVideo {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.scanner-overlay {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
}

.scanner-status,
.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(10, 12, 18, 0.74);
  font-size: 12px;
}

.status-pill {
  color: var(--muted);
}

.status-pill.ready {
  color: var(--ok);
  border-color: rgba(58, 208, 140, 0.35);
}

.status-pill.busy {
  color: #d9e4ff;
  border-color: rgba(63, 135, 255, 0.32);
}

.status-pill.error {
  color: var(--bad);
  border-color: rgba(255, 105, 123, 0.3);
}

.manual-entry,
.control-row.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

input,
select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  color: var(--text);
  background: var(--panel-2);
  outline: none;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  min-height: 18px;
  margin: 0;
  padding: 0;
  accent-color: var(--accent);
}

input:focus,
select:focus {
  border-color: var(--line-strong);
  box-shadow: 0 0 0 3px rgba(63, 135, 255, 0.14);
}

input[type="range"] {
  min-height: 0;
  padding: 0;
  border: 0;
  background: transparent;
}

.button,
.icon-button,
label.file-button {
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-2);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  transition:
    border-color 120ms ease,
    background 120ms ease,
    transform 120ms ease;
}

.file-button input {
  display: none;
}

.button:hover,
.icon-button:hover,
label.file-button:hover {
  border-color: var(--line-strong);
  transform: translateY(-1px);
}

.button.primary {
  border-color: rgba(63, 135, 255, 0.65);
  background: var(--accent);
  color: #fff;
  font-weight: 760;
}

.button.ghost {
  background: transparent;
}

.button.compact,
label.file-button.compact {
  min-height: 38px;
  padding: 8px 12px;
  font-size: 13px;
}

.hero-button {
  width: 100%;
}

.icon-button {
  width: 38px;
  padding: 0;
}

.button:disabled,
.icon-button:disabled,
label.file-button:disabled,
.device-chip:disabled {
  opacity: 0.48;
  cursor: not-allowed;
  transform: none;
}

.segmented-group {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.segmented {
  display: grid;
}

.segmented input {
  display: none;
}

.segmented span {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-2);
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 13px;
}

.segmented input:checked + span {
  border-color: rgba(63, 135, 255, 0.45);
  background: var(--accent-soft);
  color: #fff;
}

.toggle-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel-2);
}

.toggle-row.disabled {
  opacity: 0.65;
}

.toggle-row em {
  color: var(--quiet);
  font-style: normal;
  font-size: 12px;
}

.stepper {
  display: inline-grid;
  grid-template-columns: 38px minmax(40px, auto) 38px;
  gap: 8px;
  align-items: center;
}

.stepper strong {
  text-align: center;
}

.advanced-panel {
  gap: 14px;
  padding-top: 4px;
}

.advanced-panel summary {
  list-style: none;
  cursor: pointer;
}

.advanced-panel summary::-webkit-details-marker {
  display: none;
}

progress {
  width: 100%;
  height: 8px;
  border: 0;
  border-radius: 999px;
  overflow: hidden;
}

progress::-webkit-progress-bar {
  background: rgba(255, 255, 255, 0.08);
}

progress::-webkit-progress-value,
progress::-moz-progress-bar {
  background: var(--accent);
}

.log {
  min-height: 110px;
  max-height: 180px;
  overflow: auto;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(8, 10, 14, 0.9);
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12px;
  white-space: pre-wrap;
}

@media (min-width: 900px) {
  .studio-shell {
    grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
    align-items: start;
  }
}

@media (max-width: 899px) {
  .screen {
    padding: 12px;
  }

  .connect-panel,
  .scanner-panel,
  .panel {
    border-radius: 20px;
  }

  .preview-top,
  .studio-header-actions,
  .section-line,
  .preview-actions,
  .preview-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .manual-entry,
  .control-row.split {
    grid-template-columns: 1fr;
  }

  .segmented-group {
    grid-template-columns: 1fr;
  }

  .studio-header-actions .button,
  .preview-actions .button,
  .preview-actions label.file-button {
    width: 100%;
  }
}