global.css

/*
 * Esku design tokens.
 *
 * Dark is the default rather than a variant: the app is used with the camera open, often
 * in a waiting room or a clinic, and a bright white page behind a video feed is both
 * harder to read and more conspicuous to hold up in front of someone.
 */
:root {
  --brand: #8b5cf6;
  --brand-strong: #7c3aed;
  --brand-soft: rgba(139, 92, 246, 0.14);

  --bg: #0b0a12;
  --surface: #171526;
  --surface-raised: #211d38;
  --border: rgba(255, 255, 255, 0.09);

  --text: #f5f3ff;
  --text-muted: #a5a0c0;

  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;

  --radius: 18px;
  --radius-lg: 26px;
  --gap: 16px;

  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #faf9ff;
    --surface: #ffffff;
    --surface-raised: #f3f0ff;
    --border: rgba(24, 20, 45, 0.1);
    --text: #191533;
    --text-muted: #5d5880;
    color-scheme: light;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 560px;
  margin: 0 auto;
  padding: 20px 16px 40px;
  /* Keep the transcript clear of the iOS home indicator when installed. */
  padding-bottom: calc(40px + env(safe-area-inset-bottom));
}

.masthead {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.masthead__mark {
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
}

.masthead__title {
  font-size: 1.35rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  margin: 0;
}

.masthead__tagline {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: var(--gap);
}

.card__title {
  font-size: 1rem;
  font-weight: 620;
  margin: 0 0 6px;
}

.card__body {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

/* The camera frame. Aspect-ratio rather than a fixed height so it never letterboxes. */
.stage {
  position: relative;
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  margin-bottom: var(--gap);
}

.stage__placeholder {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
  padding: 0 32px;
}

.stage__video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  /* Mirrored so the user sees themselves as in a mirror; raising the right hand must look
     like raising the right hand, or aiming a handshape becomes guesswork. */
  transform: scaleX(-1);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.stage__video.is-live {
  opacity: 1;
}

/* Skeleton layer. Mirrored exactly like the video beneath it, or the hand and its skeleton
   drift apart the moment either moves. */
.stage__overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  transform: scaleX(-1);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.stage__overlay.is-live {
  opacity: 1;
}

/* The live guess, over the video. Big because it is read at arm's length. */
.stage__hint {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  padding: 6px 20px;
  border-radius: 999px;
  background: rgba(11, 10, 18, 0.72);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.2;
}

.status {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 12px 0 20px;
  min-height: 1.4em;
}

.transcript {
  min-height: 96px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  font-size: 1.15rem;
  /* A transcript can run long; it must wrap, never scroll the page sideways. */
  overflow-wrap: anywhere;
}

.transcript:empty::before {
  content: 'El texto reconocido aparecerá aquí.';
  color: var(--text-muted);
  font-size: 0.95rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: var(--gap);
}

.button {
  appearance: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 12px 18px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: var(--brand-strong);
  color: #fff;
  min-height: 48px;
}

.button:hover:not(:disabled) {
  background: var(--brand);
}

.button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.button--quiet {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--brand-soft);
  color: var(--brand);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 620;
}

.footnote {
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-top: 28px;
  text-align: center;
}

.footnote a {
  color: inherit;
}

/* --- Teach-a-sign --- */

.field {
  display: block;
  margin: 16px 0 12px;
}

.field__label {
  display: block;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 6px;
}

.field__input {
  width: 100%;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font: inherit;
  padding: 12px 14px;
  min-height: 48px;
}

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

/* One dot per recording, so progress toward the minimum is visible at a glance. */
.takes {
  display: flex;
  gap: 8px;
  margin: 4px 0 4px;
}

.take {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
}

.take--done {
  background: var(--brand);
  border-color: var(--brand);
}

.button--small {
  min-height: 36px;
  padding: 6px 12px;
  font-size: 0.85rem;
}

.signs {
  list-style: none;
  margin: 0;
  padding: 0;
}

.signs__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.signs__item:last-child {
  border-bottom: none;
}

.signs__empty {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.storage {
  font-size: 1.4rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  margin: 14px 0 4px;
}

.card__body--tight {
  font-size: 0.78rem;
  margin-top: 10px;
}

/* The rear camera shows the world as it is; only the selfie view gets mirrored. */
.stage__video.is-flipped,
.stage__overlay.is-flipped {
  transform: none;
}

/* One chip per tracked body part. Colour identifies the part, fill says whether it is
   currently being seen — so "it is not working" becomes "it cannot see your face". */
.parts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 var(--gap);
  padding: 0;
}

.part {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  opacity: 0.55;
  transition:
    opacity 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.part__dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--part);
  opacity: 0.35;
  transition: opacity 0.2s ease;
}

.part--on {
  opacity: 1;
  color: var(--text);
  border-color: color-mix(in srgb, var(--part, currentColor) 55%, transparent);
}

.part--on .part__dot {
  opacity: 1;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--part) 25%, transparent);
}

/* Not detected, while the camera is on: the one state worth flagging in red. */
.part--off {
  opacity: 1;
  color: var(--danger);
  border-color: color-mix(in srgb, var(--danger) 40%, transparent);
}

.part--off .part__dot {
  background: var(--danger);
  opacity: 0.8;
}

/* Numbers, not prose: read at a glance on a phone while the camera is running. */
.diagnostics {
  margin-top: var(--gap);
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
}

.diagnostics__row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 10px;
  border-radius: 10px;
  background: var(--surface-raised);
}

.diagnostics__row dt {
  color: var(--text-muted);
}

.diagnostics__row dd {
  margin: 0;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Three concepts and their scores do not fit beside a label on a phone. */
.diagnostics__row--wide {
  flex-direction: column;
  gap: 4px;
}

.diagnostics__row--wide dd {
  text-align: left;
}

/* A block whose numbers are nowhere near training: the one line worth finding fast. */
.diagnostics__off {
  color: var(--danger);
  font-weight: 600;
}