/* ============================================================================
   NarrateMyWorld — assistive instrument UI
   Dark-mode default. Warm near-black backdrop, amber "on-air" accent,
   alert-red hazard. Typography pairs Instrument Serif (display, warm serif)
   with IBM Plex Sans (body, engineered sans) and IBM Plex Mono (telemetry).
   ========================================================================= */

/* --- Tokens ---------------------------------------------------------------- */

:root {
  /* Color — warm charcoal, not black. Instrument, not void. */
  --c-bg:            #0b0c0f;
  --c-bg-soft:       #101116;
  --c-surface:       #14161c;
  --c-surface-2:     #1a1c23;
  --c-surface-3:     #23262f;
  --c-border:        #2a2d36;
  --c-border-soft:   #1e2028;
  --c-border-strong: #3a3e49;

  --c-fg:            #f4efe6;   /* warm off-white for reading comfort */
  --c-fg-dim:        #a6a29a;
  --c-fg-mute:       #6e6b66;

  --c-accent:        #ffb623;   /* amber — "on-air" tally light */
  --c-accent-soft:   #a67717;
  --c-accent-ink:    #1a1200;   /* text on accent */

  --c-alert:         #ff4a3d;   /* hazard */
  --c-alert-ink:     #17070a;
  --c-ok:            #4ade80;
  --c-warn:          #facc15;

  --c-ctx-transit:   #63b7ff;
  --c-ctx-medical:   #ff8a8a;
  --c-ctx-retail:    #ffb623;
  --c-ctx-outdoor:   #87e0a4;
  --c-ctx-general:   #a6a29a;

  /* Type */
  --ff-display: "Instrument Serif", "Iowan Old Style", "Palatino", Georgia, serif;
  --ff-sans:    "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --ff-mono:    "IBM Plex Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;

  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-md:   1.125rem;
  --fs-lg:   1.25rem;
  --fs-xl:   1.5rem;
  --fs-2xl:  1.875rem;
  --fs-3xl:  2.5rem;
  --fs-4xl:  3.25rem;
  --fs-5xl:  4.25rem;

  --lh-tight: 1.1;
  --lh-snug:  1.3;
  --lh-body:  1.6;
  --lh-loose: 1.75;

  --tracking-tight:  -0.02em;
  --tracking-normal: 0;
  --tracking-wide:   0.02em;
  --tracking-wider:  0.08em;
  --tracking-widest: 0.18em;

  /* Space — 4px base */
  --s-1:  0.25rem;
  --s-2:  0.5rem;
  --s-3:  0.75rem;
  --s-4:  1rem;
  --s-5:  1.25rem;
  --s-6:  1.5rem;
  --s-8:  2rem;
  --s-10: 2.5rem;
  --s-12: 3rem;
  --s-16: 4rem;

  /* Radius */
  --r-sm:    8px;
  --r-md:    14px;
  --r-lg:    22px;
  --r-pill:  999px;

  /* Motion */
  --ease-out:   cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast:   140ms;
  --dur-base:   260ms;
  --dur-slow:   480ms;

  /* Layout */
  --tap-min:   64px;
  --content-w: 680px;

  /* Shadow — used sparingly */
  --shadow-rise: 0 1px 0 rgba(255, 255, 255, 0.04) inset,
                 0 20px 40px -20px rgba(0, 0, 0, 0.6),
                 0 8px 20px -12px rgba(0, 0, 0, 0.8);
  --shadow-accent: 0 0 0 1px rgba(255, 182, 35, 0.35),
                   0 0 30px -4px rgba(255, 182, 35, 0.45),
                   0 20px 60px -20px rgba(255, 182, 35, 0.35);
}

/* --- Base reset ------------------------------------------------------------ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--c-bg);
  color: var(--c-fg);
  font-family: var(--ff-sans);
  font-size: 17px;
  line-height: var(--lh-body);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 400;
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
}

p { margin: 0; }

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

select {
  font: inherit;
  color: inherit;
}

ol, ul, dl, dd {
  margin: 0;
  padding: 0;
}

ol { list-style: none; }

/* Selection */
::selection {
  background: var(--c-accent);
  color: var(--c-accent-ink);
}

/* --- Focus ring (universal) ----------------------------------------------- */

:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}

/* --- Backdrop decoration --------------------------------------------------- */

.bg-decor {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.bg-glow {
  position: absolute;
  top: -30vh;
  left: 50%;
  width: 120vw;
  height: 90vh;
  max-width: 1400px;
  transform: translateX(-50%);
  background:
    radial-gradient(ellipse at 50% 40%,
      rgba(255, 182, 35, 0.10) 0%,
      rgba(255, 182, 35, 0.04) 30%,
      transparent 60%);
  filter: blur(10px);
}

.bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.7) 20%, rgba(0,0,0,0.7) 70%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.7) 20%, rgba(0,0,0,0.7) 70%, transparent 100%);
  opacity: 0.6;
}

/* --- Skip link ------------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--s-4);
  z-index: 100;
  padding: var(--s-3) var(--s-5);
  background: var(--c-accent);
  color: var(--c-accent-ink);
  font-weight: 600;
  border-radius: var(--r-md);
  text-decoration: none;
  transition: top var(--dur-base) var(--ease-out);
}

.skip-link:focus {
  top: var(--s-4);
}

/* --- Layout ---------------------------------------------------------------- */

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  padding:
    max(var(--s-5), env(safe-area-inset-top))
    max(var(--s-5), env(safe-area-inset-right))
    var(--s-4)
    max(var(--s-5), env(safe-area-inset-left));
  max-width: var(--content-w);
  margin: 0 auto;
  width: 100%;
  border-bottom: 1px solid var(--c-border-soft);
  position: sticky;
  top: 0;
  background: linear-gradient(to bottom, var(--c-bg) 70%, rgba(11, 12, 15, 0.6));
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 10;
}

main {
  flex: 1 0 auto;
  width: 100%;
  max-width: var(--content-w);
  margin: 0 auto;
  padding:
    var(--s-6)
    max(var(--s-5), env(safe-area-inset-right))
    var(--s-8)
    max(var(--s-5), env(safe-area-inset-left));
}

/* --- Brand ----------------------------------------------------------------- */

.brand {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  color: var(--c-accent);
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  width: 28px;
  height: 28px;
  align-items: center;
  justify-content: center;
  color: var(--c-accent);
}

.brand-name {
  font-family: var(--ff-display);
  font-size: var(--fs-xl);
  letter-spacing: var(--tracking-tight);
  font-weight: 400;
  color: var(--c-fg);
  display: flex;
  align-items: baseline;
  gap: 0.3em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-name__primary {
  font-style: italic;
}

.brand-name__divider {
  color: var(--c-accent);
  font-size: 0.7em;
  opacity: 0.7;
  transform: translateY(-0.1em);
}

.brand-name__secondary {
  color: var(--c-fg-dim);
}

/* --- Header right ---------------------------------------------------------- */

.header-right {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  flex-shrink: 0;
}

/* --- Context badge --------------------------------------------------------- */

.context-badge {
  --ctx: var(--c-ctx-general);
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: 0.45rem 0.9rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-pill);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--c-fg-dim);
  letter-spacing: var(--tracking-wide);
  visibility: hidden;
  transition:
    color var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    background var(--dur-base) var(--ease-out);
}

.context-badge[data-context] {
  visibility: visible;
  color: var(--ctx);
  border-color: color-mix(in oklab, var(--ctx) 60%, transparent);
  background: color-mix(in oklab, var(--ctx) 10%, var(--c-surface));
}

.context-badge[data-context="transit"]  { --ctx: var(--c-ctx-transit); }
.context-badge[data-context="medical"]  { --ctx: var(--c-ctx-medical); }
.context-badge[data-context="retail"]   { --ctx: var(--c-ctx-retail); }
.context-badge[data-context="outdoor"]  { --ctx: var(--c-ctx-outdoor); }
.context-badge[data-context="general"]  { --ctx: var(--c-ctx-general); }

.context-badge__icon {
  font-size: 1.05rem;
  line-height: 1;
  filter: grayscale(0.05);
}

.context-badge__label {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

/* --- Health dot ------------------------------------------------------------ */

.health-dot {
  --c: var(--c-fg-mute);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c);
  box-shadow: 0 0 10px color-mix(in oklab, var(--c) 60%, transparent);
  transition: background var(--dur-base) var(--ease-out);
}

.health-dot[data-state="idle"]    { --c: var(--c-fg-mute); }
.health-dot[data-state="ok"]      { --c: var(--c-ok); }
.health-dot[data-state="slow"]    { --c: var(--c-warn); }
.health-dot[data-state="error"]   { --c: var(--c-alert); }

/* --- Tagline --------------------------------------------------------------- */

.tagline {
  font-family: var(--ff-display);
  font-style: italic;
  font-size: clamp(var(--fs-xl), 4.5vw, var(--fs-3xl));
  line-height: var(--lh-snug);
  color: var(--c-fg);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--s-8);
  max-width: 22ch;
}

.tagline__ornament {
  color: var(--c-accent);
  font-style: normal;
  margin-right: 0.3em;
  letter-spacing: 0;
}

/* --- Hero stage ------------------------------------------------------------ */

.hero {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--s-8);
  margin-bottom: var(--s-10);
}

.primary-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1 / 1;
  max-width: 360px;
  width: min(82vw, 360px);
  margin: 0 auto;
  padding: 0;
  color: var(--c-accent);
}

.primary-stage__dial {
  position: absolute;
  inset: 0;
  color: var(--c-accent);
  opacity: 0.45;
  pointer-events: none;
}

/* --- Primary button (Start / Stop) ---------------------------------------- */

.primary-btn {
  position: relative;
  width: 76%;
  height: 76%;
  border: none;
  border-radius: 50%;
  padding: 0;
  background:
    radial-gradient(circle at 50% 30%, var(--c-accent) 0%, color-mix(in oklab, var(--c-accent) 78%, #b87a00) 55%, color-mix(in oklab, var(--c-accent) 60%, #5a3800) 100%);
  color: var(--c-accent-ink);
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.35),
    inset 0 -8px 20px rgba(0, 0, 0, 0.2),
    var(--shadow-rise),
    var(--shadow-accent);
  cursor: pointer;
  transition:
    transform var(--dur-fast) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    background var(--dur-base) var(--ease-out);
  overflow: hidden;
  isolation: isolate;
}

.primary-btn:hover { transform: translateY(-1px); }
.primary-btn:active { transform: translateY(1px) scale(0.995); }

.primary-btn__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  gap: 0.1em;
  padding: 0 var(--s-6);
  text-align: center;
}

.primary-btn__eyebrow {
  font-family: var(--ff-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  opacity: 0.6;
  font-weight: 500;
}

.primary-btn-label {
  font-family: var(--ff-display);
  font-size: clamp(2rem, 7vw, 2.75rem);
  line-height: 1;
  letter-spacing: -0.02em;
  font-weight: 400;
  text-wrap: balance;
}

/* Stopped state (pressed=true = running, but when stopped is start, so default = "start") */
.primary-btn[aria-pressed="true"] {
  background:
    radial-gradient(circle at 50% 30%, var(--c-alert) 0%, color-mix(in oklab, var(--c-alert) 78%, #5a0000) 55%, color-mix(in oklab, var(--c-alert) 60%, #2c0000) 100%);
  color: var(--c-alert-ink);
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, 0.28),
    inset 0 -8px 20px rgba(0, 0, 0, 0.25),
    0 0 0 1px rgba(255, 74, 61, 0.4),
    0 0 40px -4px rgba(255, 74, 61, 0.55),
    0 20px 60px -20px rgba(255, 74, 61, 0.45);
}

.primary-btn:focus-visible {
  outline: 4px solid var(--c-accent);
  outline-offset: 8px;
}

.primary-btn[aria-pressed="true"]:focus-visible {
  outline-color: var(--c-alert);
}

/* Pulse rings — animate only when active */
.pulse-ring {
  position: absolute;
  inset: -4%;
  border-radius: 50%;
  border: 2px solid currentColor;
  opacity: 0;
  pointer-events: none;
  z-index: -1;
}

.primary-btn[aria-pressed="true"] .pulse-ring--1 {
  animation: pulse 2.4s cubic-bezier(0.3, 0, 0.2, 1) infinite;
}

.primary-btn[aria-pressed="true"] .pulse-ring--2 {
  animation: pulse 2.4s cubic-bezier(0.3, 0, 0.2, 1) infinite;
  animation-delay: 1.2s;
}

@keyframes pulse {
  0%   { transform: scale(1);    opacity: 0.7; }
  80%  { opacity: 0; }
  100% { transform: scale(1.55); opacity: 0; }
}

/* --- Secondary controls ---------------------------------------------------- */

.secondary-controls {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-3);
}

.secondary-btn {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  min-height: var(--tap-min);
  padding: var(--s-3) var(--s-5);
  background: var(--c-surface);
  color: var(--c-fg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  font-size: var(--fs-md);
  font-weight: 500;
  letter-spacing: var(--tracking-normal);
  transition:
    border-color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    transform var(--dur-fast) var(--ease-out);
  text-align: left;
}

.secondary-btn:hover:not(:disabled) {
  border-color: var(--c-border-strong);
  background: var(--c-surface-2);
}

.secondary-btn:active:not(:disabled) {
  transform: translateY(1px);
}

.secondary-btn[aria-pressed="true"] {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: color-mix(in oklab, var(--c-accent) 8%, var(--c-surface));
}

.secondary-btn[disabled],
.secondary-btn[aria-disabled="true"] {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.secondary-btn__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: var(--r-sm);
  background: var(--c-surface-2);
  color: var(--c-fg-dim);
  border: 1px solid var(--c-border);
}

.secondary-btn[aria-pressed="true"] .secondary-btn__icon {
  background: color-mix(in oklab, var(--c-accent) 15%, var(--c-surface-2));
  color: var(--c-accent);
  border-color: color-mix(in oklab, var(--c-accent) 40%, var(--c-border));
}

.secondary-btn__label {
  flex: 1 1 auto;
  min-width: 0;
}

/* --- Language row ---------------------------------------------------------- */

.lang-row {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  min-height: var(--tap-min);
  padding: var(--s-2) var(--s-3) var(--s-2) var(--s-5);
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
}

.lang-label {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--c-fg-dim);
  flex-shrink: 0;
}

.lang-label__icon {
  display: inline-flex;
  color: var(--c-fg-mute);
}

.lang-select {
  flex: 1 1 auto;
  min-height: calc(var(--tap-min) - var(--s-4));
  padding: 0 var(--s-4);
  background: var(--c-surface-2);
  color: var(--c-fg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-sm);
  font-size: var(--fs-md);
  font-weight: 500;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1l5 5 5-5' stroke='%23a6a29a' stroke-width='1.6' fill='none' stroke-linecap='round'/></svg>");
  background-repeat: no-repeat;
  background-position: right var(--s-4) center;
  padding-right: var(--s-8);
}

.lang-select:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
  border-color: var(--c-accent);
}

/* --- Telemetry ------------------------------------------------------------- */

.telemetry {
  background:
    linear-gradient(180deg,
      color-mix(in oklab, var(--c-surface) 90%, transparent) 0%,
      var(--c-surface) 100%);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--s-5) var(--s-6);
  margin-bottom: var(--s-8);
  position: relative;
}

.telemetry__head {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin-bottom: var(--s-4);
  padding-bottom: var(--s-3);
  border-bottom: 1px dashed var(--c-border);
}

.telemetry__bar {
  width: 3px;
  height: 14px;
  background: var(--c-accent);
  border-radius: 2px;
}

.telemetry__title {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  color: var(--c-fg-dim);
}

.telemetry__grid {
  display: grid;
  gap: var(--s-3);
}

.telemetry__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  font-size: var(--fs-sm);
  border-bottom: 1px dotted var(--c-border-soft);
  padding-bottom: var(--s-2);
}

.telemetry__row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.telemetry__row dt {
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--c-fg-mute);
}

.telemetry__row dd {
  color: var(--c-fg);
  font-weight: 500;
  text-align: right;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mono {
  font-family: var(--ff-mono);
  font-feature-settings: "zero" on;
}

/* --- Transcript ------------------------------------------------------------ */

.transcript {
  margin-bottom: var(--s-8);
}

.section-head {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin-bottom: var(--s-5);
}

.section-head__title {
  font-family: var(--ff-display);
  font-style: italic;
  font-size: var(--fs-2xl);
  line-height: 1;
  color: var(--c-fg);
  letter-spacing: var(--tracking-tight);
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
}

.section-head__ornament {
  color: var(--c-accent);
  font-style: normal;
  font-size: 0.8em;
  transform: translateY(-0.08em);
}

.section-head__rule {
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(to right, var(--c-border), transparent);
}

.section-head__tag {
  font-size: var(--fs-xs);
  color: var(--c-accent);
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  padding: 0.15rem 0.5rem;
  border: 1px solid color-mix(in oklab, var(--c-accent) 45%, transparent);
  border-radius: var(--r-sm);
}

#transcript {
  display: grid;
  gap: var(--s-3);
}

#transcript:empty + .transcript__empty {
  display: block;
}

.transcript__empty {
  display: none;
  color: var(--c-fg-mute);
  font-style: italic;
  font-family: var(--ff-display);
  font-size: var(--fs-md);
  padding: var(--s-5);
  border: 1px dashed var(--c-border);
  border-radius: var(--r-md);
  text-align: center;
}

#transcript li {
  position: relative;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  padding: var(--s-4) var(--s-5);
  padding-left: calc(var(--s-5) + 4px);
  font-size: var(--fs-md);
  line-height: var(--lh-loose);
  color: var(--c-fg);
  font-family: var(--ff-sans);
  letter-spacing: 0.005em;
  animation: entry var(--dur-slow) var(--ease-out) both;
}

#transcript li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--c-border-strong);
  border-top-left-radius: var(--r-md);
  border-bottom-left-radius: var(--r-md);
}

#transcript li:first-child::before {
  background: var(--c-accent);
}

#transcript li:first-child {
  box-shadow: 0 0 0 1px color-mix(in oklab, var(--c-accent) 20%, transparent);
}

@keyframes entry {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

#transcript li .meta {
  display: block;
  margin-top: var(--s-2);
  color: var(--c-fg-mute);
  font-family: var(--ff-mono);
  font-size: var(--fs-xs);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

/* --- Hazard highlight ------------------------------------------------------ */

mark.hazard {
  background: color-mix(in oklab, var(--c-alert) 92%, #000 8%);
  color: var(--c-alert-ink);
  padding: 0.05em 0.35em;
  border-radius: 4px;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  animation: hazard-pulse 0.9s ease-in-out infinite;
}

#transcript li.has-hazard {
  background: color-mix(in oklab, var(--c-alert) 6%, var(--c-surface));
  border-color: color-mix(in oklab, var(--c-alert) 50%, var(--c-border));
  box-shadow:
    0 0 0 1px color-mix(in oklab, var(--c-alert) 30%, transparent),
    0 0 24px -8px color-mix(in oklab, var(--c-alert) 40%, transparent);
}

#transcript li.has-hazard::before {
  background: var(--c-alert) !important;
  box-shadow: 0 0 12px color-mix(in oklab, var(--c-alert) 60%, transparent);
}

@keyframes hazard-pulse {
  0%, 100% { filter: brightness(1);   }
  50%      { filter: brightness(1.35); }
}

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

.camera-preview {
  position: relative;
  margin-bottom: var(--s-8);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  overflow: hidden;
  aspect-ratio: 1 / 1;
  max-width: 200px;
  background: var(--c-bg-soft);
  opacity: 0.7;
  transition: opacity var(--dur-base) var(--ease-out);
}

.camera-preview:hover {
  opacity: 1;
}

.camera-preview video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.camera-preview__chrome {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--s-2) var(--s-3);
  font-family: var(--ff-mono);
  font-size: 0.65rem;
  color: var(--c-fg-dim);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.75), transparent);
  pointer-events: none;
}

.camera-preview__rec {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--c-alert);
}

.camera-preview__rec-dot {
  width: 6px;
  height: 6px;
  background: var(--c-alert);
  border-radius: 50%;
  animation: rec-blink 1.4s ease-in-out infinite;
}

@keyframes rec-blink {
  0%, 60%, 100% { opacity: 1; }
  70%, 90%      { opacity: 0.2; }
}

/* --- Footer ---------------------------------------------------------------- */

.app-footer {
  border-top: 1px solid var(--c-border-soft);
  padding:
    var(--s-6)
    max(var(--s-5), env(safe-area-inset-right))
    max(var(--s-6), env(safe-area-inset-bottom))
    max(var(--s-5), env(safe-area-inset-left));
  margin-top: auto;
}

.app-footer__inner {
  max-width: var(--content-w);
  margin: 0 auto;
  color: var(--c-fg-dim);
  font-size: var(--fs-sm);
  line-height: var(--lh-body);
}

.app-footer__inner p { margin-bottom: var(--s-3); }
.app-footer__inner p:last-child { margin-bottom: 0; }

.app-footer__signature {
  font-family: var(--ff-display);
  font-style: italic;
  color: var(--c-fg-mute);
  font-size: var(--fs-base);
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
}

.app-footer__signature span[aria-hidden="true"] {
  color: var(--c-accent);
  opacity: 0.7;
}

/* --- Screen-reader only ---------------------------------------------------- */

.sr-only,
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.visually-hidden:focus,
.sr-only:focus {
  position: static !important;
  width: auto;
  height: auto;
  clip: auto;
  white-space: normal;
}

/* --- Larger breakpoint ----------------------------------------------------- */

@media (min-width: 640px) {
  :root { --content-w: 720px; }

  body { font-size: 18px; }

  .primary-stage {
    max-width: 380px;
    width: 380px;
  }

  .secondary-controls {
    grid-template-columns: 1fr 1fr;
  }

  .secondary-controls .lang-row {
    grid-column: 1 / -1;
  }

  .brand-name {
    font-size: var(--fs-2xl);
  }

  .primary-btn-label {
    font-size: clamp(2.25rem, 5vw, 3rem);
  }

  .camera-preview {
    position: fixed;
    bottom: var(--s-5);
    right: var(--s-5);
    max-width: 160px;
    z-index: 20;
    box-shadow: 0 10px 30px -10px rgba(0,0,0,0.6);
  }
}

@media (min-width: 960px) {
  .tagline {
    margin-top: var(--s-4);
  }
}

/* --- High contrast preference --------------------------------------------- */

@media (prefers-contrast: more) {
  :root {
    --c-bg:          #000;
    --c-bg-soft:     #000;
    --c-surface:     #0a0a0a;
    --c-surface-2:   #111;
    --c-surface-3:   #1a1a1a;
    --c-border:      #fff;
    --c-border-soft: #ccc;
    --c-border-strong: #fff;
    --c-fg:          #fff;
    --c-fg-dim:      #eaeaea;
    --c-fg-mute:     #c8c8c8;
    --c-accent:      #ffd400;
    --c-accent-ink:  #000;
    --c-alert:       #ff4d4d;
    --c-alert-ink:   #000;
  }

  .bg-glow, .bg-grid { display: none; }

  .primary-btn {
    background: var(--c-accent);
    color: var(--c-accent-ink);
    box-shadow: none;
    border: 3px solid var(--c-fg);
  }

  .primary-btn[aria-pressed="true"] {
    background: var(--c-alert);
    color: var(--c-alert-ink);
    border: 3px solid var(--c-fg);
    box-shadow: none;
  }

  .secondary-btn {
    border-width: 2px;
  }

  #transcript li::before {
    width: 4px;
  }
}

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

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0ms !important;
    scroll-behavior: auto !important;
  }

  .pulse-ring,
  .camera-preview__rec-dot,
  mark.hazard {
    animation: none !important;
  }

  .primary-btn[aria-pressed="true"] {
    /* Keep the color state obvious even without the pulse */
    box-shadow:
      0 0 0 4px var(--c-alert),
      0 0 0 8px color-mix(in oklab, var(--c-alert) 30%, transparent);
  }
}

/* --- Print ---------------------------------------------------------------- */

@media print {
  .bg-decor,
  .camera-preview,
  .primary-stage,
  .secondary-controls,
  .app-footer { display: none; }

  body, html {
    background: #fff;
    color: #000;
  }

  #transcript li {
    break-inside: avoid;
    border-color: #888;
    color: #000;
    background: #fff;
  }
}