:root[data-theme="light"] {
  --bg: #f4f2ec;
  --surface: #fbfaf7;
  --text: #16140f;
  --muted: #6b675c;
  --border: #d8d4c8;
  --accent: #e8500f;
  --accent-contrast: #ffffff;
  --card: #ffffff;
  --shadow: 0 2px 0 var(--border);
}

:root[data-theme="dark"] {
  --bg: #14130f;
  --surface: #1c1a15;
  --text: #f0ede4;
  --muted: #999483;
  --border: #383428;
  --accent: #ff6a1f;
  --accent-contrast: #16140f;
  --card: #ffffff; /* preview stays light: scanners need dark-on-light modules */
  --shadow: 0 2px 0 #000000;
}

* {
  box-sizing: border-box;
}

html {
  height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  transition: background-color 160ms ease, color 160ms ease;
}

/* ---- header ---- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
}

.wordmark {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.wordmark__stripes,
.footer__stripes {
  display: inline-block;
  width: 34px;
  height: 16px;
  background: repeating-linear-gradient(
    90deg,
    currentColor 0 2px,
    transparent 2px 4px,
    currentColor 4px 7px,
    transparent 7px 9px,
    currentColor 9px 10px,
    transparent 10px 13px
  );
}

.topbar__controls {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.lang {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface);
}

.lang__option {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 7px 10px;
  cursor: pointer;
}

.lang__option:hover {
  color: var(--accent);
}

.lang__option:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.lang__option[aria-pressed="true"] {
  background: var(--text);
  color: var(--bg);
}

.theme-toggle {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex: none;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

:root[data-theme="light"] .icon--sun,
:root[data-theme="dark"] .icon--moon {
  display: none;
}

/* ---- main column ---- */

.stage {
  width: min(560px, calc(100% - 48px));
  margin: 0 auto;
  padding: 32px 0 48px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.stage__title {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 500;
  font-size: clamp(1.7rem, 5vw, 2.4rem);
  letter-spacing: -0.02em;
  margin: 24px 0 0;
  animation: rise 420ms ease backwards;
}

.stage__title em {
  font-style: normal;
  color: var(--accent);
}

.stage__subtitle {
  color: var(--muted);
  margin: 0 0 8px;
  animation: rise 420ms ease 60ms backwards;
}

/* ---- input ---- */

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  animation: rise 420ms ease 120ms backwards;
}

.field__label {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

#content {
  font: inherit;
  font-size: 1.05rem;
  padding: 14px 16px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
}

#content::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

#content:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

/* ---- segmented control ---- */

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface);
  animation: rise 420ms ease 180ms backwards;
}

.segmented__option {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 11px 0;
  cursor: pointer;
}

.segmented__option:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}

.segmented__option[aria-pressed="true"] {
  background: var(--text);
  color: var(--bg);
}

/* ---- color controls ---- */

.colors {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  animation: rise 420ms ease 200ms backwards;
}

.colors[hidden] {
  display: none;
}

.invert {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 100ms ease, color 100ms ease;
}

.invert:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.invert:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.invert__swatch {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  border: 1px solid var(--border);
  /* Diagonal split previews the two-tone result. */
  background: linear-gradient(135deg, #ffffff 0 50%, #111111 50% 100%);
}

.invert__hint {
  font-weight: 400;
  opacity: 0.8;
}

.invert[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.invert[aria-pressed="true"] .invert__swatch {
  background: linear-gradient(135deg, #111111 0 50%, #ffffff 50% 100%);
}

.bgpicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 10px 0 8px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
}

.bgpicker:focus-within {
  border-color: var(--accent);
}

.bgpicker__color {
  appearance: none;
  -webkit-appearance: none;
  width: 26px;
  height: 26px;
  padding: 0;
  border: none;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
}

.bgpicker__color::-webkit-color-swatch-wrapper {
  padding: 0;
}

.bgpicker__color::-webkit-color-swatch {
  border: 1px solid var(--border);
  border-radius: 6px;
}

.bgpicker__color::-moz-color-swatch {
  border: 1px solid var(--border);
  border-radius: 6px;
}

.bgpicker__hex {
  width: 8ch;
  border: 0;
  background: transparent;
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: lowercase;
}

.bgpicker__hex:focus-visible {
  outline: none;
}

/* ---- logo picker ---- */

.logo {
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: rise 420ms ease 210ms backwards;
}

.logo[hidden] {
  display: none;
}

.logo__optional {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  opacity: 0.8;
}

.logo__options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.logo__chip {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--muted);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 100ms ease, color 100ms ease;
}

.logo__chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.logo__chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.logo__chip[aria-pressed="true"] {
  border-color: var(--accent);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.logo__chip--none,
.logo__chip--upload {
  padding: 0 14px;
}

/* Brand chips are icon-only squares. */
.logo__chip:not(.logo__chip--none):not(.logo__chip--upload) {
  width: 40px;
  padding: 0;
  justify-content: center;
}

.logo__swatch {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  display: block;
}

/* ---- preview ---- */

.preview {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: rise 420ms ease 240ms backwards;
}

#preview-canvas {
  max-width: 100%;
  height: auto;
  animation: pop 180ms ease;
}

.preview__hint {
  color: #6b675c;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.85rem;
  text-align: center;
  margin: 0;
  max-width: 36ch;
}

/* ---- download ---- */

.download {
  appearance: none;
  border: 0;
  border-radius: 10px;
  padding: 15px 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  background: var(--accent);
  color: var(--accent-contrast);
  cursor: pointer;
  animation: rise 420ms ease 300ms backwards;
  transition: transform 100ms ease, opacity 100ms ease;
}

.download:hover:not(:disabled) {
  transform: translateY(-1px);
}

.download:active:not(:disabled) {
  transform: translateY(1px);
}

.download:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.download:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ---- content / SEO copy ---- */

.content {
  width: min(560px, calc(100% - 48px));
  margin: 8px auto 0;
  color: var(--text);
}

.content__title {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 500;
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  margin: 36px 0 12px;
}

.content h3 {
  font-family: "IBM Plex Mono", monospace;
  font-weight: 600;
  font-size: 1rem;
  margin: 24px 0 6px;
}

.content p {
  margin: 0 0 12px;
  color: var(--muted);
}

.content__steps {
  margin: 0 0 12px;
  padding-left: 20px;
  color: var(--muted);
}

.content__steps li {
  margin: 4px 0;
}

/* ---- footer ---- */

.footer {
  display: flex;
  align-items: center;
  gap: 12px;
  width: min(560px, calc(100% - 48px));
  margin: 0 auto;
  padding: 18px 0 28px;
  color: var(--muted);
  font-size: 0.8rem;
}

.footer__stripes {
  flex: none;
  opacity: 0.6;
}

.footer p {
  margin: 0;
}

/* ---- motion ---- */

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pop {
  from {
    transform: scale(0.97);
    opacity: 0.6;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}