:root {
  color-scheme: dark;
  --bg: #020203;
  --bg-2: #080809;
  --surface: rgba(17, 17, 18, 0.86);
  --surface-2: rgba(255, 255, 255, 0.052);
  --surface-3: rgba(255, 255, 255, 0.088);
  --ink: #f6f6f7;
  --muted: #a1a1a7;
  --soft: #dedee2;
  --border: rgba(255, 255, 255, 0.13);
  --border-strong: rgba(255, 255, 255, 0.26);
  --accent: #8b5cf6;
  --accent-2: #c4b5fd;
  --danger: #ffffff;
  --ok: #f4f4f5;
  --warn: #c7c7ce;
  --shadow: 0 24px 110px rgba(0, 0, 0, 0.72);
  --radius: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  min-width: 1180px;
  width: 100vw;
  height: 100vh;
  margin: 0;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.1), transparent 18%, transparent 82%, rgba(255, 255, 255, 0.06)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.16), transparent 13rem),
    linear-gradient(135deg, #020203 0%, #0b0b0d 54%, #030304 100%);
  color: var(--ink);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.8), transparent 85%);
}

body::after {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(115deg, transparent 0 35%, rgba(255, 255, 255, 0.08) 36%, transparent 42%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), transparent 20rem);
  opacity: 0.55;
}

button,
input,
textarea {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

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

.topbar {
  position: fixed;
  inset: 18px auto 18px 18px;
  z-index: 40;
  display: grid;
  grid-template-rows: auto 1fr auto;
  width: 178px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(7, 7, 11, 0.72);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px);
}

.brand {
  display: grid;
  gap: 10px;
  align-content: start;
  color: #fff;
  font-size: 0.96rem;
  font-weight: 850;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.045)),
    #111112;
  color: #fff;
  box-shadow: 0 0 28px rgba(255, 255, 255, 0.12);
  font-size: 0.8rem;
  font-weight: 900;
}

.ghost-button,
.secondary-button,
.primary-button,
.wide-button,
.file-button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 14px;
  font-size: 0.86rem;
  font-weight: 850;
  letter-spacing: 0;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease;
}

.ghost-button {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: #fff;
}

.secondary-button,
.file-button {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.055);
  color: #fff;
}

.primary-button,
.wide-button {
  border: 1px solid rgba(255, 255, 255, 0.9);
  background: linear-gradient(180deg, #ffffff, #d8d8dc);
  color: #050506;
  box-shadow: 0 0 34px rgba(255, 255, 255, 0.16);
}

.wide-button {
  width: 100%;
}

.ghost-button:hover,
.secondary-button:hover,
.primary-button:hover,
.wide-button:hover,
.file-button:hover {
  border-color: rgba(255, 255, 255, 0.36);
  transform: translateY(-1px);
}

.primary-button:hover,
.wide-button:hover {
  box-shadow:
    0 0 0 3px rgba(139, 92, 246, 0.14),
    0 0 42px rgba(255, 255, 255, 0.2);
}

.file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.shell {
  display: grid;
  grid-template-columns: minmax(560px, 1.05fr) minmax(520px, 0.95fr);
  grid-template-areas:
    "capture plan"
    "verify verify"
    "document document";
  gap: 18px;
  width: min(1760px, calc(100vw - 232px));
  min-height: 100vh;
  margin: 18px 18px 40px 214px;
}

.panel {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.026)),
    rgba(9, 9, 10, 0.82);
  box-shadow: var(--shadow);
  padding: 18px;
  backdrop-filter: blur(22px);
}

.panel::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(115deg, transparent 0 40%, rgba(255, 255, 255, 0.075) 42%, transparent 48%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055), transparent 34%);
  opacity: 0.55;
}

.panel > * {
  position: relative;
}

.capture-panel {
  grid-area: capture;
  min-height: calc(100vh - 36px);
}

#plan {
  grid-area: plan;
  min-height: calc(100vh - 36px);
}

#verify {
  grid-area: verify;
}

#document {
  grid-area: document;
}

.section-heading {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.section-number {
  display: grid;
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 900;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2 {
  color: #fff;
  font-size: clamp(1.7rem, 2.45vw, 2.7rem);
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  color: #fff;
  font-size: 1rem;
  letter-spacing: 0;
}

.section-heading p:last-child {
  margin-top: 7px;
  color: var(--muted);
  line-height: 1.45;
}

.capture-grid {
  display: grid;
  grid-template-rows: minmax(380px, 1fr) auto;
  gap: 14px;
  min-height: calc(100vh - 142px);
}

.image-stage,
.idea-console,
.serial-panel,
.camera-panel,
.doc-actions,
.web-flash-panel,
.code-panel,
.visual-guide-panel {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.045);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.image-stage {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  min-height: 0;
  overflow: hidden;
}

#partsCanvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 360px;
  background: #0c0c11;
}

.upload-row,
.voice-row,
.button-row,
.inline-form {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.upload-row {
  justify-content: space-between;
  padding: 12px;
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.24);
}

.idea-console,
.serial-panel,
.camera-panel,
.doc-actions,
.web-flash-panel {
  display: grid;
  gap: 12px;
  padding: 14px;
}

.field-label,
label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 850;
  text-transform: uppercase;
}

textarea,
input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.34);
  color: #fff;
  outline: none;
  padding: 10px 11px;
}

textarea::placeholder,
input::placeholder {
  color: rgba(255, 255, 255, 0.44);
}

textarea {
  min-height: 118px;
  resize: vertical;
  line-height: 1.5;
}

textarea:focus,
input:focus {
  border-color: rgba(196, 181, 253, 0.7);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.18);
}

.status-pill {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
  padding: 0 10px;
  font-size: 0.78rem;
  font-weight: 850;
}

.transcript-box,
.status-strip {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.28);
  color: var(--muted);
  padding: 11px;
  line-height: 1.45;
}

.transcript-box {
  min-height: 54px;
}

.status-strip.ok,
.status-pill.ok {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.075);
  color: var(--ok);
}

.status-strip.warn,
.status-pill.warn {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.045);
  color: var(--warn);
}

.status-strip.danger,
.status-pill.danger {
  border-color: rgba(255, 255, 255, 0.4);
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.09), transparent 42%),
    rgba(255, 255, 255, 0.06);
  color: var(--danger);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.visual-guide-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  min-height: calc(100vh - 160px);
  overflow: hidden;
}

.carousel-header,
.code-panel-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.22);
}

.carousel-header span {
  color: var(--accent-2);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.visual-step-list {
  display: grid;
  min-height: 0;
  padding: 14px;
}

.visual-step-card {
  display: grid;
  grid-template-columns: minmax(720px, 1.62fr) minmax(300px, 0.58fr);
  gap: 18px;
  align-items: stretch;
  height: 100%;
  min-height: 0;
  animation: stepReveal 240ms ease both;
}

.visual-step-card canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: #050507;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.04),
    0 0 34px rgba(255, 255, 255, 0.08);
}

.visual-step-copy {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
  min-height: 0;
  padding: 6px 2px 6px 0;
}

.visual-step-card strong {
  color: #fff;
  font-size: 1.2rem;
  line-height: 1.35;
}

.visual-step-card span {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.58;
}

.visual-step-card em {
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
  color: var(--soft);
  padding: 12px 14px;
  font-size: 0.92rem;
  font-style: normal;
  font-weight: 760;
  line-height: 1.5;
}

.visual-step-empty {
  display: grid;
  min-height: 420px;
  place-content: center;
  gap: 10px;
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.06), transparent 28%),
    rgba(0, 0, 0, 0.2);
  color: var(--muted);
  text-align: center;
}

.visual-step-empty strong {
  color: #fff;
  font-size: 1.06rem;
}

.visual-step-empty span {
  color: var(--muted);
  font-size: 0.92rem;
}

@keyframes stepReveal {
  from {
    opacity: 0;
    transform: translateX(10px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.carousel-controls {
  display: grid;
  grid-template-columns: 130px 1fr 130px;
  gap: 12px;
  align-items: center;
  padding: 14px;
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.22);
}

.carousel-controls.is-inline {
  grid-template-columns: 96px minmax(84px, 1fr) 124px;
  margin-top: 4px;
  padding: 0;
  border-top: 0;
  background: transparent;
}

.carousel-controls.is-inline .secondary-button,
.carousel-controls.is-inline .primary-button {
  min-height: 44px;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 7px;
}

.carousel-dots button {
  width: 8px;
  height: 8px;
  min-height: 8px;
  border: 0;
  border-radius: 999px;
  padding: 0;
  background: rgba(255, 255, 255, 0.24);
}

.carousel-dots button.is-active {
  width: 30px;
  background: var(--accent);
  box-shadow: 0 0 18px rgba(139, 92, 246, 0.65);
}

.code-panel {
  margin-top: 14px;
  overflow: hidden;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

#firmwareOutput,
.terminal,
.readme-preview {
  max-height: 520px;
  overflow: auto;
  background: #030305;
  color: #f2f2f6;
  padding: 16px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  line-height: 1.6;
}

.terminal {
  min-height: 360px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
}

.verify-command-grid {
  display: grid;
  grid-template-columns: minmax(330px, 0.82fr) minmax(420px, 1.1fr) minmax(330px, 0.82fr);
  gap: 14px;
  align-items: stretch;
}

.op-header {
  display: flex;
  gap: 11px;
  align-items: flex-start;
}

.op-header > span {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
  color: #fff;
  font-size: 0.74rem;
  font-weight: 900;
}

.op-header p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.42;
}

.inline-form {
  align-items: end;
}

.inline-form label {
  min-width: 110px;
  flex: 1 1 160px;
}

.inline-form input[type="text"],
.inline-form input[type="url"] {
  flex: 1 1 220px;
}

.web-flash-panel .inline-form label:first-child {
  flex: 1 1 240px;
}

.flash-progress {
  height: 24px;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.065);
}

.flash-progress span {
  display: flex;
  width: 0%;
  height: 100%;
  align-items: center;
  justify-content: center;
  background: linear-gradient(90deg, #8b5cf6, #c4b5fd);
  color: #fff;
  font-size: 0.74rem;
  font-weight: 900;
  transition: width 180ms ease;
}

.advanced-flash {
  border-top: 1px solid var(--border);
  padding-top: 10px;
}

.advanced-flash summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 850;
}

.advanced-flash .inline-form {
  margin-top: 10px;
}

.camera-panel video {
  width: 100%;
  aspect-ratio: 16 / 10;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: #030305;
  object-fit: cover;
}

.evidence-strip {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(82px, 1fr));
  gap: 8px;
  min-height: 70px;
}

.evidence-strip img {
  width: 100%;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--border);
  border-radius: 6px;
  object-fit: cover;
}

.doc-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.34fr) minmax(0, 0.66fr);
  gap: 14px;
}

.doc-actions {
  align-content: start;
}

.readme-preview {
  min-height: 360px;
}

.checkbox-row {
  display: flex;
  grid-template-columns: auto 1fr;
  align-items: center;
  color: var(--soft);
  text-transform: none;
}

.checkbox-row input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.settings-dialog {
  width: min(720px, calc(100% - 24px));
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #08080d;
  color: var(--ink);
  box-shadow: var(--shadow);
  padding: 0;
}

.settings-dialog::backdrop {
  background: rgba(0, 0, 0, 0.72);
}

.settings-dialog form {
  display: grid;
  gap: 16px;
  padding: 20px;
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.settings-status {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
  color: var(--muted);
  padding: 11px;
  line-height: 1.45;
}

.ok {
  color: var(--ok);
}

.warn {
  color: var(--warn);
}

.danger {
  color: var(--danger);
}

/* Fixed stage player layout */
.topbar {
  position: fixed;
  inset: 18px 18px auto;
  z-index: 40;
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr) 190px;
  gap: 16px;
  align-items: center;
  width: auto;
  height: 112px;
  padding: 14px 16px;
  border-radius: 10px;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
}

.brand-mark {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
}

.workflow-timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  min-width: 0;
}

.workflow-timeline::before {
  position: absolute;
  top: 24px;
  right: 8%;
  left: 8%;
  height: 1px;
  pointer-events: none;
  content: "";
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.08));
}

.timeline-step {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  grid-template-rows: auto auto;
  grid-template-areas:
    "num label"
    "num hint";
  min-width: 0;
  min-height: 68px;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.022)),
    rgba(0, 0, 0, 0.18);
  color: var(--muted);
  padding: 10px;
  text-align: left;
}

.timeline-step span {
  display: grid;
  grid-area: num;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: #111116;
  color: #fff;
  font-size: 0.74rem;
  font-weight: 900;
}

.timeline-step strong {
  grid-area: label;
  overflow: hidden;
  color: #fff;
  font-size: 0.88rem;
  font-weight: 900;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timeline-step em {
  grid-area: hint;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.72rem;
  font-style: normal;
  font-weight: 760;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.timeline-step.is-active {
  border-color: rgba(196, 181, 253, 0.64);
  background:
    linear-gradient(135deg, rgba(139, 92, 246, 0.16), rgba(255, 255, 255, 0.07)),
    rgba(255, 255, 255, 0.055);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.05),
    0 0 28px rgba(139, 92, 246, 0.18);
}

.timeline-step.is-active span {
  border-color: rgba(196, 181, 253, 0.7);
  background: linear-gradient(135deg, #8b5cf6, #5b21b6);
  box-shadow: 0 0 22px rgba(139, 92, 246, 0.5);
}

.timeline-step.is-complete span {
  border-color: rgba(255, 255, 255, 0.34);
  color: var(--ok);
}

.shell {
  position: fixed;
  top: 142px;
  right: 18px;
  bottom: 94px;
  left: 18px;
  display: block;
  width: auto;
  min-height: 0;
  margin: 0;
}

.workflow-stage {
  display: none;
  width: 100%;
  height: 100%;
  min-height: 0;
  max-height: 100%;
  animation: stageIn 220ms ease both;
}

.workflow-stage.is-active {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}

.workflow-stage[hidden] {
  display: none;
}

@keyframes stageIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.capture-panel,
#plan,
#flash,
#verify,
#document {
  grid-area: auto;
  min-height: 0;
}

.section-heading {
  min-height: 58px;
  margin-bottom: 12px;
}

h1,
h2 {
  font-size: clamp(1.8rem, 2.2vw, 2.45rem);
}

.capture-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(380px, 0.82fr);
  grid-template-rows: minmax(0, 1fr);
  gap: 14px;
  min-height: 0;
  height: 100%;
}

.image-stage,
.idea-console,
.visual-guide-panel,
.web-flash-panel,
.serial-panel,
.camera-panel,
.doc-actions,
.code-panel {
  min-height: 0;
}

#partsCanvas {
  min-height: 0;
}

.idea-console {
  grid-template-rows: auto minmax(0, 1fr) auto auto auto;
}

textarea {
  min-height: 0;
  resize: none;
}

.transcript-box {
  min-height: 44px;
  max-height: 76px;
  overflow: auto;
}

#plan .visual-guide-panel {
  min-height: 0;
  height: 100%;
}

.visual-step-card {
  grid-template-columns: minmax(720px, 1.62fr) minmax(300px, 0.58fr);
  grid-template-rows: minmax(0, 1fr);
  min-height: 0;
}

.visual-step-card canvas {
  min-height: 0;
}

.visual-step-empty {
  min-height: 0;
  height: 100%;
}

.flash-stage-grid {
  display: grid;
  grid-template-columns: minmax(380px, 0.72fr) minmax(0, 1.28fr);
  gap: 14px;
  min-height: 0;
  height: 100%;
}

#flash .web-flash-panel {
  align-content: start;
}

#flash .code-panel {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  margin-top: 0;
}

#firmwareOutput {
  max-height: none;
  min-height: 0;
  overflow: auto;
}

.verify-command-grid {
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.82fr);
  min-height: 0;
  height: 100%;
}

.serial-panel {
  grid-template-rows: auto auto auto minmax(0, 1fr) auto;
}

.terminal {
  min-height: 0;
}

.camera-panel {
  grid-template-rows: auto minmax(0, 1fr) auto auto auto;
}

.camera-panel video {
  min-height: 0;
  height: 100%;
  aspect-ratio: auto;
}

.evidence-strip {
  min-height: 54px;
  max-height: 72px;
  overflow: auto;
}

.doc-grid {
  grid-template-columns: minmax(280px, 0.32fr) minmax(0, 0.68fr);
  min-height: 0;
  height: 100%;
}

.readme-preview {
  max-height: none;
  min-height: 0;
}

.stage-controls {
  position: fixed;
  right: 18px;
  bottom: 18px;
  left: 18px;
  z-index: 35;
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) 150px;
  gap: 14px;
  align-items: center;
  height: 64px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(7, 7, 11, 0.78);
  box-shadow: var(--shadow);
  padding: 10px 12px;
  backdrop-filter: blur(22px);
}

.stage-control-copy {
  display: grid;
  justify-items: center;
  min-width: 0;
  text-align: center;
}

.stage-control-copy strong {
  color: #fff;
  font-size: 0.96rem;
  font-weight: 900;
}

.stage-control-copy span {
  overflow: hidden;
  max-width: 720px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.orientation-card {
  display: none;
}

@media (max-width: 1240px) {
  body {
    min-width: 1024px;
  }

  .topbar {
    grid-template-columns: 160px minmax(0, 1fr) 166px;
  }

  .ghost-button {
    width: auto;
  }

  .timeline-step {
    grid-template-columns: 38px minmax(0, 1fr);
    padding: 8px;
  }

  .timeline-step em {
    display: none;
  }

  .capture-grid {
    grid-template-columns: minmax(0, 1fr) minmax(330px, 0.78fr);
  }

  .visual-step-card {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: minmax(380px, 1fr) auto;
  }

  .visual-step-card canvas {
    min-height: 380px;
  }

  .visual-step-copy {
    padding: 0;
  }

  .flash-stage-grid,
  .verify-command-grid,
  .doc-grid {
    grid-template-columns: minmax(0, 1fr) minmax(330px, 0.85fr);
  }
}

@media (max-width: 720px) {
  body {
    min-width: 960px;
  }

  .panel {
    padding: 14px;
  }

  .topbar {
    inset: 12px 12px auto;
    height: 104px;
  }

  .shell {
    top: 128px;
    right: 12px;
    bottom: 86px;
    left: 12px;
  }

  .stage-controls {
    right: 12px;
    bottom: 12px;
    left: 12px;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) and (orientation: portrait) {
  body {
    min-width: 0;
    overflow: hidden;
  }

  .topbar,
  .shell,
  .stage-controls {
    display: none;
  }

  .orientation-card {
    position: fixed;
    inset: 14px;
    display: grid;
    align-content: center;
    justify-items: center;
    gap: 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background:
      linear-gradient(135deg, rgba(255, 255, 255, 0.09), transparent 36%),
      rgba(8, 8, 10, 0.9);
    box-shadow: var(--shadow);
    padding: 28px;
    text-align: center;
  }

  .orientation-card .brand-mark {
    margin-bottom: 8px;
  }

  .orientation-card h2 {
    max-width: 12ch;
    font-size: 2.15rem;
  }

  .orientation-card p {
    max-width: 28ch;
    color: var(--muted);
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.5;
  }
}

/* Monochrome violet visual refresh */
:root {
  color-scheme: light;
  --bg: #f7f7fa;
  --bg-2: #e8e9ef;
  --surface: rgba(255, 255, 255, 0.84);
  --surface-2: rgba(255, 255, 255, 0.68);
  --surface-3: rgba(15, 15, 18, 0.055);
  --ink: #181818;
  --muted: #666a73;
  --soft: #34363d;
  --border: rgba(24, 24, 28, 0.16);
  --border-strong: rgba(24, 24, 28, 0.32);
  --accent: #5b6dff;
  --accent-2: #8b5cf6;
  --danger: #9f2936;
  --ok: #34785f;
  --warn: #8a6f1f;
  --shadow: 0 28px 80px rgba(28, 31, 42, 0.14);
  --script: "Segoe Print", "Bradley Hand ITC", cursive;
}

html {
  background: var(--bg);
}

body {
  background:
    linear-gradient(90deg, rgba(24, 24, 28, 0.04), transparent 24%, transparent 78%, rgba(91, 109, 255, 0.055)),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 48%, #eceef5 100%);
  color: var(--ink);
}

body::before {
  background-image:
    linear-gradient(rgba(24, 24, 28, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 24, 28, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.16), transparent 78%);
}

body::after {
  background:
    linear-gradient(115deg, transparent 0 48%, rgba(91, 109, 255, 0.09) 49%, transparent 54%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.62), transparent 18rem);
  opacity: 1;
}

.intro-page {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(24, 24, 28, 0.032), transparent 30%, transparent 72%, rgba(91, 109, 255, 0.06)),
    linear-gradient(180deg, #ffffff 0%, #f2f3f7 100%),
    #f7f7fa;
  color: var(--ink);
  cursor: pointer;
  padding: clamp(20px, 4vw, 58px);
}

.intro-page::before,
.intro-page::after {
  position: absolute;
  pointer-events: none;
  content: "";
}

.intro-page::before {
  inset: 0;
  background-image:
    linear-gradient(rgba(24, 24, 28, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(24, 24, 28, 0.035) 1px, transparent 1px);
  background-size: 78px 78px;
  mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
}

.intro-page::after {
  right: clamp(18px, 5vw, 84px);
  bottom: clamp(18px, 5vw, 84px);
  width: min(33vw, 520px);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(91, 109, 255, 0.56), transparent);
  transform: rotate(-36deg);
  transform-origin: right center;
}

body.intro-active .intro-page {
  display: flex;
}

body.intro-active .topbar,
body.intro-active .shell,
body.intro-active .stage-controls,
body.intro-active .orientation-card {
  visibility: hidden;
  pointer-events: none;
}

.intro-frame {
  position: relative;
  width: min(1720px, 100%);
  height: min(790px, calc(100vh - clamp(40px, 8vw, 116px)));
  min-height: 620px;
  overflow: hidden;
  border: 1px solid rgba(24, 24, 28, 0.22);
  border-radius: clamp(18px, 2.5vw, 36px);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.62), transparent 32%),
    linear-gradient(180deg, rgba(239, 240, 245, 0.98), rgba(216, 219, 229, 0.94)),
    #e0e3ec;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.74),
    0 34px 90px rgba(28, 31, 42, 0.15);
  isolation: isolate;
}

.intro-frame::before,
.intro-frame::after {
  position: absolute;
  inset: 12px;
  z-index: 1;
  pointer-events: none;
  content: "";
}

.intro-frame::before {
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: inherit;
  mask-image:
    linear-gradient(90deg, #000 0 18%, transparent 18% 82%, #000 82% 100%),
    linear-gradient(180deg, #000 0 18%, transparent 18% 82%, #000 82% 100%);
  mask-composite: intersect;
}

.intro-frame::after {
  background:
    linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.14) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.5;
}

.intro-nav {
  position: absolute;
  top: 20px;
  right: 22px;
  left: 22px;
  z-index: 6;
  display: flex;
  justify-content: space-between;
  gap: 28px;
  align-items: center;
}

.intro-brand {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  background: rgba(24, 24, 28, 0.42);
  color: #ffffff;
  padding: 0 18px;
  backdrop-filter: blur(14px);
}

.intro-brand span {
  font-size: 0.94rem;
  font-weight: 900;
  letter-spacing: 0;
}

.intro-hint {
  color: rgba(52, 54, 61, 0.72);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 1rem;
  font-style: normal;
}

.intro-process {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: 999px;
  background: rgba(24, 24, 28, 0.22);
  color: #ffffff;
  padding: 5px;
  backdrop-filter: blur(14px);
}

.intro-process span {
  display: inline-flex;
  min-width: 74px;
  min-height: 30px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 0.72rem;
  font-weight: 850;
  text-transform: uppercase;
}

.intro-process span:first-child {
  background: linear-gradient(135deg, #2b3cff, #8b5cf6);
  color: #ffffff;
}

.intro-copy {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  z-index: 4;
  display: grid;
  align-content: start;
  justify-items: center;
  padding: clamp(118px, 15vh, 155px) clamp(28px, 5vw, 92px) 0;
  text-align: center;
}

.intro-kicker {
  margin-bottom: 16px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(24, 24, 28, 0.14);
  color: rgba(255, 255, 255, 0.86);
  padding: 9px 13px;
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}

.intro-copy h1 {
  max-width: 11ch;
  color: var(--ink);
  font-size: clamp(4.8rem, 8vw, 8.8rem);
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: 0;
  text-shadow: none;
}

.intro-statement {
  max-width: 720px;
  margin-top: 26px;
  color: var(--soft);
  font-size: clamp(1.08rem, 1.22vw, 1.32rem);
  font-weight: 650;
  line-height: 1.5;
  text-shadow: none;
}

.intro-statement strong {
  color: var(--ink);
  font-weight: 900;
}

.intro-start {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  margin-top: 30px;
  border: 1px solid rgba(24, 24, 28, 0.9);
  border-radius: 999px;
  background: #181818;
  color: #ffffff;
  padding: 0 28px;
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
  box-shadow:
    0 12px 30px rgba(28, 31, 42, 0.16),
    0 0 0 3px rgba(91, 109, 255, 0.08);
}

.intro-hint {
  display: block;
  margin-top: 24px;
}

.intro-visual {
  position: absolute;
  top: 57%;
  right: 6%;
  left: 6%;
  z-index: 2;
  aspect-ratio: 16 / 4;
  opacity: 0.9;
}

.intro-visual canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.topbar,
.stage-controls,
.panel,
.settings-dialog {
  border-color: var(--border);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.74), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.86), rgba(240, 241, 246, 0.76)),
    rgba(255, 255, 255, 0.7);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.72),
    0 26px 68px rgba(28, 31, 42, 0.12);
  backdrop-filter: blur(18px);
}

.top-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  min-width: 0;
}

.top-actions .ghost-button {
  width: auto;
  min-width: 84px;
}

.panel::before {
  background:
    linear-gradient(115deg, transparent 0 52%, rgba(91, 109, 255, 0.09) 53%, transparent 58%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.56), transparent 34%);
  opacity: 0.76;
}

.brand,
h1,
h2,
h3,
.timeline-step strong,
.stage-control-copy strong,
.visual-step-card strong {
  color: var(--ink);
}

.brand {
  font-weight: 950;
  letter-spacing: 0.01em;
}

.brand-mark,
.section-number,
.op-header > span,
.timeline-step span {
  border-color: var(--border-strong);
  background: #171716;
  color: #ffffff;
  box-shadow: none;
}

.section-heading p:last-child,
.op-header p,
.visual-step-card span,
.stage-control-copy span,
.transcript-box,
.status-strip,
.timeline-step,
.timeline-step em,
.field-label,
label {
  color: var(--muted);
}

.timeline-step {
  border-color: var(--border);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.42), rgba(255, 255, 255, 0.16)),
    rgba(24, 24, 28, 0.04);
}

.timeline-step.is-active {
  border-color: rgba(91, 109, 255, 0.7);
  background:
    linear-gradient(135deg, rgba(91, 109, 255, 0.16), rgba(139, 92, 246, 0.1)),
    rgba(255, 255, 255, 0.58);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.72),
    0 18px 34px rgba(91, 109, 255, 0.14);
}

.timeline-step.is-active span {
  border-color: rgba(139, 92, 246, 0.72);
  background: linear-gradient(135deg, #2b3cff, #8b5cf6);
  color: #ffffff;
  box-shadow: none;
}

.workflow-timeline::before {
  background: linear-gradient(90deg, rgba(24, 24, 28, 0.28), rgba(24, 24, 28, 0.08));
}

.ghost-button,
.secondary-button,
.primary-button,
.wide-button,
.file-button {
  border-radius: 999px;
  letter-spacing: 0.04em;
}

.ghost-button,
.secondary-button,
.file-button {
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink);
}

.primary-button,
.wide-button {
  border-color: #171716;
  background: #171716;
  color: #ffffff;
  box-shadow: none;
}

.ghost-button:hover,
.secondary-button:hover,
.primary-button:hover,
.wide-button:hover,
.file-button:hover {
  border-color: var(--accent);
  box-shadow: 0 10px 24px rgba(91, 109, 255, 0.16);
}

.image-stage,
.idea-console,
.serial-panel,
.camera-panel,
.doc-actions,
.web-flash-panel,
.code-panel,
.visual-guide-panel,
.transcript-box,
.status-strip,
textarea,
input,
.settings-status {
  border-color: var(--border);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.68), rgba(241, 242, 247, 0.42)),
    rgba(255, 255, 255, 0.46);
  color: var(--ink);
}

#partsCanvas,
.visual-step-card canvas,
.camera-panel video,
#firmwareOutput,
.terminal,
.readme-preview {
  border-color: rgba(24, 24, 28, 0.28);
  background: #0f1015;
  color: #ffffff;
}

.upload-row,
.carousel-header,
.code-panel-header,
.stage-controls,
.carousel-controls {
  border-color: var(--border);
  background: rgba(238, 239, 245, 0.72);
}

textarea,
input {
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
}

textarea::placeholder,
input::placeholder {
  color: rgba(102, 106, 115, 0.72);
}

textarea:focus,
input:focus {
  border-color: rgba(91, 109, 255, 0.7);
  box-shadow: 0 0 0 3px rgba(91, 109, 255, 0.16);
}

.status-strip.ok,
.status-pill.ok {
  border-color: rgba(86, 105, 74, 0.42);
  background: rgba(86, 105, 74, 0.12);
  color: var(--ok);
}

.status-strip.warn,
.status-pill.warn {
  border-color: rgba(138, 106, 66, 0.42);
  background: rgba(138, 106, 66, 0.12);
  color: var(--warn);
}

.status-strip.danger,
.status-pill.danger {
  border-color: rgba(138, 51, 38, 0.42);
  background: rgba(138, 51, 38, 0.1);
  color: var(--danger);
}

.visual-step-card em {
  border-color: rgba(91, 109, 255, 0.3);
  background: rgba(91, 109, 255, 0.1);
  color: var(--soft);
}

.carousel-dots button {
  background: rgba(24, 24, 28, 0.22);
}

.carousel-dots button.is-active,
.flash-progress span {
  background: var(--accent);
  box-shadow: none;
}

.settings-dialog::backdrop {
  background: rgba(23, 23, 22, 0.42);
}

@media (max-width: 1240px) {
  .intro-copy {
    padding-inline: 38px;
  }

  .intro-visual {
    top: 60%;
    right: 2%;
    left: 2%;
  }
}

@media (max-width: 720px) {
  body.intro-active {
    min-width: 0;
  }

  .intro-page {
    padding: 14px;
  }

  .intro-frame {
    height: calc(100vh - 28px);
    min-height: 0;
  }

  .intro-nav {
    top: 14px;
    right: 14px;
    left: 14px;
  }

  .intro-process {
    display: none;
  }

  .intro-copy {
    padding: 110px 24px 0;
  }

  .intro-copy h1 {
    max-width: min(100%, 9ch);
    font-size: clamp(2.8rem, 12vw, 3.7rem);
    line-height: 0.98;
  }

  .intro-statement {
    max-width: 30ch;
    font-size: 1rem;
  }

  .intro-start {
    margin-top: 26px;
  }

  .intro-visual {
    top: 66%;
    right: -38%;
    left: -38%;
    opacity: 0.68;
  }
}

/* Tailwind-style white theme refinement */
:root {
  color-scheme: light;
  --bg: #f8fafc;
  --bg-2: #eef2ff;
  --surface: rgba(255, 255, 255, 0.94);
  --surface-2: rgba(248, 250, 252, 0.9);
  --surface-3: rgba(241, 245, 249, 0.92);
  --ink: #0f172a;
  --muted: #64748b;
  --soft: #334155;
  --border: rgba(148, 163, 184, 0.36);
  --border-strong: rgba(99, 102, 241, 0.34);
  --accent: #7c3aed;
  --accent-2: #4f46e5;
  --danger: #e11d48;
  --ok: #059669;
  --warn: #d97706;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

html,
body {
  background: #f8fafc;
}

body {
  background:
    radial-gradient(circle at 17% 0%, rgba(124, 58, 237, 0.12), transparent 32rem),
    radial-gradient(circle at 86% 12%, rgba(79, 70, 229, 0.1), transparent 30rem),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 56%, #eef2ff 100%);
  color: var(--ink);
}

body::before {
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.14) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.18), transparent 72%);
}

body::after {
  background:
    linear-gradient(115deg, transparent 0 54%, rgba(124, 58, 237, 0.08) 55%, transparent 60%),
    radial-gradient(circle at 62% 18%, rgba(124, 58, 237, 0.08), transparent 28rem);
  opacity: 0.9;
}

.intro-page {
  background:
    radial-gradient(circle at 18% 4%, rgba(124, 58, 237, 0.14), transparent 30rem),
    radial-gradient(circle at 78% 10%, rgba(79, 70, 229, 0.13), transparent 28rem),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.intro-frame {
  border-color: rgba(148, 163, 184, 0.42);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(248, 250, 252, 0.72)),
    #ffffff;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.88),
    0 24px 70px rgba(15, 23, 42, 0.12);
}

.intro-frame::before {
  border-color: rgba(148, 163, 184, 0.38);
}

.intro-frame::after,
.intro-page::before {
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.15) 1px, transparent 1px);
}

.intro-brand,
.intro-process {
  border-color: rgba(148, 163, 184, 0.4);
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
}

.intro-process span {
  color: var(--muted);
}

.intro-process span:first-child,
.timeline-step.is-active span {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #ffffff;
}

.intro-kicker {
  border-color: rgba(124, 58, 237, 0.22);
  background: rgba(238, 242, 255, 0.82);
  color: #5b21b6;
}

.intro-copy h1,
.intro-statement,
.intro-hint {
  color: var(--ink);
}

.intro-statement,
.intro-hint {
  color: var(--muted);
}

.intro-start,
.primary-button,
.wide-button {
  border-color: transparent;
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  color: #ffffff;
  box-shadow:
    0 14px 30px rgba(79, 70, 229, 0.2),
    0 0 0 1px rgba(255, 255, 255, 0.72) inset;
}

.intro-start:hover,
.primary-button:hover,
.wide-button:hover {
  border-color: transparent;
  box-shadow:
    0 18px 38px rgba(79, 70, 229, 0.26),
    0 0 0 1px rgba(255, 255, 255, 0.82) inset;
  transform: translateY(-1px);
}

.topbar,
.stage-controls,
.panel,
.settings-dialog {
  border-color: var(--border);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 250, 252, 0.9)),
    #ffffff;
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.panel::before {
  background:
    radial-gradient(circle at 64% 10%, rgba(124, 58, 237, 0.08), transparent 24rem),
    linear-gradient(90deg, rgba(255, 255, 255, 0.72), transparent 45%);
  opacity: 0.9;
}

.brand,
h1,
h2,
h3,
.timeline-step strong,
.stage-control-copy strong,
.visual-step-card strong {
  color: var(--ink);
}

.brand-mark,
.section-number,
.op-header > span,
.timeline-step span {
  border-color: rgba(148, 163, 184, 0.44);
  background: #ffffff;
  color: var(--ink);
  box-shadow:
    0 8px 18px rgba(15, 23, 42, 0.08),
    0 0 0 1px rgba(255, 255, 255, 0.72) inset;
}

.section-heading p:last-child,
.op-header p,
.visual-step-card span,
.stage-control-copy span,
.transcript-box,
.status-strip,
.timeline-step,
.timeline-step em,
.field-label,
label {
  color: var(--muted);
}

.workflow-timeline::before {
  background: linear-gradient(90deg, rgba(99, 102, 241, 0.34), rgba(148, 163, 184, 0.18));
}

.timeline-step {
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.76);
}

.timeline-step.is-active {
  border-color: rgba(124, 58, 237, 0.44);
  background: linear-gradient(135deg, rgba(238, 242, 255, 0.96), rgba(245, 243, 255, 0.88));
  box-shadow:
    0 14px 30px rgba(79, 70, 229, 0.1),
    0 0 0 1px rgba(255, 255, 255, 0.86) inset;
}

.ghost-button,
.secondary-button,
.file-button {
  border-color: rgba(148, 163, 184, 0.44);
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.05);
}

.ghost-button:hover,
.secondary-button:hover,
.file-button:hover {
  border-color: rgba(124, 58, 237, 0.42);
  background: #ffffff;
  color: #4f46e5;
  box-shadow: 0 12px 24px rgba(79, 70, 229, 0.12);
}

button:disabled,
button:disabled:hover {
  border-color: rgba(203, 213, 225, 0.8);
  background: #f1f5f9;
  color: #94a3b8;
  box-shadow: none;
  transform: none;
}

.image-stage,
.idea-console,
.serial-panel,
.camera-panel,
.doc-actions,
.web-flash-panel,
.code-panel,
.visual-guide-panel,
.transcript-box,
.status-strip,
textarea,
input,
.settings-status {
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
}

#partsCanvas,
.visual-step-card canvas,
.camera-panel video {
  border-color: rgba(148, 163, 184, 0.44);
  background: #f8fafc;
  color: var(--ink);
}

#firmwareOutput,
.terminal,
.readme-preview {
  border-color: rgba(148, 163, 184, 0.44);
  background:
    linear-gradient(180deg, #ffffff, #f8fafc),
    #ffffff;
  color: #1e293b;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.78);
}

.upload-row,
.carousel-header,
.code-panel-header,
.carousel-controls {
  border-color: var(--border);
  background: rgba(248, 250, 252, 0.92);
}

textarea,
input {
  background: #ffffff;
  color: var(--ink);
}

textarea::placeholder,
input::placeholder {
  color: rgba(100, 116, 139, 0.72);
}

textarea:focus,
input:focus {
  border-color: rgba(124, 58, 237, 0.54);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.13);
}

.status-strip.ok,
.status-pill.ok {
  border-color: rgba(16, 185, 129, 0.34);
  background: rgba(236, 253, 245, 0.92);
  color: #047857;
}

.status-strip.warn,
.status-pill.warn {
  border-color: rgba(245, 158, 11, 0.34);
  background: rgba(255, 251, 235, 0.94);
  color: #b45309;
}

.status-strip.danger,
.status-pill.danger {
  border-color: rgba(244, 63, 94, 0.34);
  background: rgba(255, 241, 242, 0.94);
  color: #be123c;
}

.visual-step-card {
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.82);
  grid-template-columns: minmax(760px, 1.74fr) minmax(330px, 0.54fr);
  gap: 20px;
}

.carousel-header {
  padding: 10px 14px;
  background: rgba(248, 250, 252, 0.72);
}

.carousel-header h3 {
  color: #475569;
  font-size: 0.88rem;
  font-weight: 800;
  line-height: 1.2;
}

.carousel-header span {
  color: #64748b;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

.visual-step-copy {
  gap: 12px;
  padding: 8px 0;
}

.visual-step-card .step-copy-kicker {
  margin: 0 0 -2px;
  color: #5b4be7;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-transform: uppercase;
}

.visual-step-card .step-copy-title {
  color: var(--ink);
  font-size: clamp(1.55rem, 2.05vw, 2.25rem);
  font-weight: 920;
  line-height: 1.08;
}

.visual-step-card .step-copy-instruction {
  color: #334155;
  font-size: clamp(1rem, 1.08vw, 1.12rem);
  font-weight: 650;
  line-height: 1.62;
}

.step-copy-tip {
  margin-top: 6px;
  border: 1px solid rgba(148, 163, 184, 0.34);
  border-radius: 8px;
  background: rgba(248, 250, 252, 0.92);
  padding: 12px 14px;
  box-shadow: none;
}

.visual-step-card .step-copy-tip-label {
  display: block;
  margin-bottom: 6px;
  color: #64748b;
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  line-height: 1.2;
  text-transform: uppercase;
}

.visual-step-card .step-copy-tip-text {
  margin: 0;
  color: #64748b;
  font-size: 0.92rem;
  font-weight: 650;
  line-height: 1.55;
}

.carousel-controls.is-inline {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(148, 163, 184, 0.24);
}

.visual-step-empty {
  border-color: rgba(148, 163, 184, 0.46);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(248, 250, 252, 0.86)),
    #f8fafc;
  color: var(--muted);
}

.visual-step-empty strong {
  color: var(--ink);
}

.visual-step-card em {
  border-color: rgba(124, 58, 237, 0.24);
  background: rgba(245, 243, 255, 0.92);
  color: var(--soft);
}

@media (max-width: 1180px) {
  .visual-step-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .visual-step-card .step-copy-title {
    font-size: 1.45rem;
  }
}

.carousel-dots button {
  background: #cbd5e1;
}

.carousel-dots button.is-active,
.flash-progress span {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  box-shadow: 0 8px 18px rgba(79, 70, 229, 0.18);
}

.settings-dialog::backdrop {
  background: rgba(15, 23, 42, 0.36);
}

/* README-style homepage */
.intro-frame {
  overflow: hidden;
}

.intro-copy {
  position: relative;
  inset: auto;
  z-index: 4;
  display: flex;
  width: min(1120px, calc(100% - clamp(40px, 8vw, 112px)));
  height: 100%;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  margin: 0 auto;
  padding: clamp(84px, 12vh, 112px) 0 30px;
  text-align: left;
}

.intro-product-name {
  margin: 0 0 8px;
  color: #475569;
  font-size: 0.95rem;
  font-weight: 900;
  letter-spacing: 0;
}

.intro-copy h1 {
  max-width: none;
  color: var(--ink);
  font-size: clamp(2.55rem, 4.4vw, 4.65rem);
  line-height: 1;
}

.intro-statement,
.intro-promise {
  max-width: 780px;
  margin-top: 14px;
  color: #475569;
  font-size: clamp(1rem, 1.05vw, 1.12rem);
  font-weight: 650;
  line-height: 1.58;
}

.intro-promise {
  margin-top: 8px;
  color: var(--ink);
  font-weight: 820;
}

.intro-start {
  margin-top: 18px;
}

.intro-proof {
  width: 100%;
  margin: 26px 0 0;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.36);
  border-radius: 8px;
  background: #ffffff;
  padding: 10px;
  box-shadow: 0 18px 46px rgba(15, 23, 42, 0.1);
}

.intro-proof img {
  display: block;
  width: 100%;
  max-height: min(350px, 38vh);
  border-radius: 6px;
  object-fit: cover;
  object-position: top center;
}

.intro-visual {
  display: none;
}

@media (max-width: 720px) {
  .intro-copy {
    width: calc(100% - 36px);
    padding-top: 92px;
  }

  .intro-product-name {
    font-size: 0.86rem;
  }

  .intro-copy h1 {
    font-size: clamp(2.25rem, 10vw, 3.15rem);
  }

  .intro-statement,
  .intro-promise {
    max-width: 100%;
    font-size: 0.95rem;
  }

  .intro-proof {
    margin-top: 20px;
    padding: 7px;
  }

  .intro-proof img {
    max-height: 240px;
  }
}

/* Polished landing page */
body.intro-active {
  min-width: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 0%, rgba(124, 58, 237, 0.16), transparent 34rem),
    radial-gradient(circle at 78% 12%, rgba(59, 130, 246, 0.12), transparent 30rem),
    linear-gradient(180deg, #ffffff 0%, #f8fafc 50%, #eef2ff 100%);
}

body.intro-active::before {
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.06) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.78), transparent 96%);
}

body.intro-active::after {
  opacity: 0;
}

body.intro-active .intro-page {
  display: flex;
  align-items: flex-start;
}

.intro-page {
  padding: clamp(14px, 2.2vw, 34px);
  overflow-y: auto;
  background:
    linear-gradient(115deg, rgba(124, 58, 237, 0.08), transparent 28rem),
    linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(248, 250, 252, 0.9));
}

.intro-frame {
  width: min(1720px, 100%);
  min-height: calc(100vh - clamp(28px, 4.4vw, 68px));
  height: auto;
  max-height: none;
  margin: 0 auto;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.5);
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.78)),
    #ffffff;
  box-shadow: 0 28px 90px rgba(15, 23, 42, 0.14);
}

.intro-frame::before {
  inset: 12px;
  z-index: 0;
  border: 1px solid rgba(148, 163, 184, 0.34);
  border-radius: 14px;
}

.intro-frame::after {
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.13) 1px, transparent 1px);
  background-size: 74px 74px;
  opacity: 0.55;
}

.intro-nav {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: clamp(18px, 2.4vw, 34px);
}

.intro-brand {
  gap: 10px;
  min-height: 42px;
  padding: 7px 16px 7px 8px;
  border: 1px solid rgba(148, 163, 184, 0.46);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
  text-decoration: none;
}

.intro-brand span:last-child {
  color: #0f172a;
  font-size: 0.9rem;
  font-weight: 900;
}

.intro-brand-mark {
  display: inline-grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 999px;
  background: #0f172a;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 900;
}

.intro-process {
  gap: 4px;
  min-height: 42px;
  padding: 4px;
  border: 1px solid rgba(148, 163, 184, 0.46);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

.intro-process span {
  min-width: 78px;
  border-radius: 999px;
  color: #64748b;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
}

.intro-process span:first-child {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(79, 70, 229, 0.26);
}

.intro-hero {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(340px, 0.75fr) minmax(540px, 1.25fr);
  gap: clamp(28px, 3.6vw, 64px);
  align-items: center;
  padding: clamp(22px, 3.2vw, 52px) clamp(24px, 5vw, 92px) clamp(28px, 3.4vw, 56px);
}

.intro-copy {
  position: relative;
  inset: auto;
  display: flex;
  width: auto;
  max-width: 690px;
  min-height: 0;
  margin: 0;
  padding: 0;
  align-items: flex-start;
  justify-content: center;
  text-align: left;
}

.intro-product-name {
  display: inline-flex;
  width: fit-content;
  margin: 0 0 18px;
  padding: 8px 12px;
  border: 1px solid rgba(124, 58, 237, 0.26);
  border-radius: 999px;
  background: rgba(124, 58, 237, 0.08);
  color: #5b21b6;
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0;
}

.intro-copy h1 {
  max-width: 12ch;
  color: #0f172a;
  font-size: clamp(3.25rem, 5vw, 5.9rem);
  font-weight: 950;
  line-height: 0.92;
  letter-spacing: 0;
}

.intro-statement,
.intro-promise {
  max-width: 620px;
  margin-top: 20px;
  color: #475569;
  font-size: clamp(1rem, 1.12vw, 1.18rem);
  font-weight: 680;
  line-height: 1.45;
}

.intro-promise {
  margin-top: 14px;
  padding: 12px 14px;
  border-left: 4px solid #6d4aff;
  border-radius: 8px;
  background: rgba(109, 74, 255, 0.08);
  color: #111827;
  font-size: clamp(0.96rem, 1.02vw, 1.05rem);
  font-weight: 850;
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 24px;
}

.intro-start {
  min-height: 48px;
  margin-top: 0;
  padding: 0 24px;
  border: 1px solid rgba(79, 70, 229, 0.4);
  border-radius: 999px;
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #ffffff;
  box-shadow: 0 18px 36px rgba(79, 70, 229, 0.25);
  font-size: 0.92rem;
  font-weight: 950;
  text-transform: uppercase;
}

.intro-start:hover {
  transform: translateY(-1px);
  box-shadow: 0 24px 42px rgba(79, 70, 229, 0.3);
}

.intro-secondary {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid rgba(148, 163, 184, 0.54);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: #334155;
  font-size: 0.9rem;
  font-weight: 900;
  text-decoration: none;
}

.intro-proof {
  margin: 0;
  padding: 10px;
  border: 1px solid rgba(148, 163, 184, 0.42);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.13);
}

.intro-proof img {
  width: 100%;
  max-height: none;
  aspect-ratio: 16 / 9;
  border-radius: 8px;
  object-fit: contain;
  object-position: center;
  background: #ffffff;
}

.intro-hero-artifact {
  position: relative;
}

.intro-hero-artifact::before {
  position: absolute;
  inset: -18px 12% auto;
  z-index: -1;
  height: 120px;
  border-radius: 999px;
  background: rgba(124, 58, 237, 0.16);
  filter: blur(34px);
  content: "";
}

.intro-features {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding: 0 clamp(24px, 5vw, 92px) clamp(28px, 4vw, 56px);
}

.intro-feature {
  display: grid;
  gap: 16px;
  min-width: 0;
  padding: 12px 12px 18px;
  border: 1px solid rgba(148, 163, 184, 0.42);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 16px 42px rgba(15, 23, 42, 0.08);
}

.intro-feature img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(226, 232, 240, 0.96);
  border-radius: 6px;
  background: #ffffff;
  object-fit: contain;
}

.intro-feature div {
  padding-inline: 4px;
}

.intro-feature p {
  margin: 0 0 8px;
  color: #6d4aff;
  font-size: 0.72rem;
  font-weight: 950;
  letter-spacing: 0;
  text-transform: uppercase;
}

.intro-feature h2 {
  margin: 0;
  color: #0f172a;
  font-size: clamp(1.08rem, 1.3vw, 1.38rem);
  font-weight: 950;
  line-height: 1.12;
}

.intro-feature span {
  display: block;
  margin-top: 10px;
  color: #64748b;
  font-size: 0.97rem;
  font-weight: 650;
  line-height: 1.45;
}

@media (max-width: 1180px) {
  .intro-hero {
    grid-template-columns: 1fr;
  }

  .intro-copy {
    max-width: 860px;
  }

  .intro-copy h1 {
    max-width: 12ch;
  }

  .intro-features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .intro-page {
    padding: 10px;
  }

  .intro-frame {
    border-radius: 12px;
  }

  .intro-nav {
    padding: 16px;
  }

  .intro-process {
    display: none;
  }

  .intro-hero {
    padding: 28px 18px 24px;
  }

  .intro-copy {
    width: auto;
    padding-top: 0;
  }

  .intro-copy h1 {
    font-size: clamp(2.6rem, 13vw, 4rem);
  }

  .intro-statement,
  .intro-promise {
    max-width: 100%;
  }

  .intro-actions,
  .intro-start,
  .intro-secondary {
    width: 100%;
  }

  .intro-features {
    padding: 0 18px 24px;
  }
}