:root {
  --color-bg: #EEF2F0;
  --color-surface: #FFFFFF;
  --color-ink: #1B2430;
  --color-ink-soft: #5B6472;
  --color-line: #D8DEDA;
  --color-me: #2B5FAD;
  --color-me-strong: #1F4784;
  --color-them: #E8A93A;
  --color-them-strong: #B5790F;
  --color-them-ink: #3B2A12;
  --color-success: #3E8E7E;
  --color-error: #B23A2E;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Work Sans', sans-serif;

  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-pill: 999px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: #DCE3DE;
  font-family: var(--font-body);
  color: var(--color-ink);
}

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

.app {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
  max-width: 480px;
  margin: 0 auto;
  background: var(--color-surface);
  box-shadow: 0 0 40px rgba(27, 36, 48, 0.08);
}

/* Header */
.app__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 14px;
}
.app__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-ink);
}
.app__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: 0.02em;
  margin: 0;
}
.settings-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  cursor: pointer;
}
.settings-toggle:hover { color: var(--color-ink); }

.app__stripe {
  height: 5px;
  background: repeating-linear-gradient(
    -45deg,
    var(--color-me) 0 12px,
    var(--color-surface) 12px 17px,
    var(--color-them) 17px 29px,
    var(--color-surface) 29px 34px
  );
}

/* Settings */
.settings {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px 20px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  max-height: 320px;
  opacity: 1;
  overflow: hidden;
  transition: max-height 0.25s ease, opacity 0.2s ease, padding 0.25s ease;
}
.settings.is-collapsed {
  max-height: 0;
  opacity: 0;
  padding-top: 0;
  padding-bottom: 0;
}
.settings__field {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.settings__label {
  font-size: 0.85rem;
  color: var(--color-ink-soft);
  font-weight: 500;
}
.settings__select {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-ink);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 8px 10px;
}
.segmented {
  display: inline-flex;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  padding: 3px;
}
.segmented__option {
  border: none;
  background: transparent;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  cursor: pointer;
}
.segmented__option.is-active {
  background: var(--color-ink);
  color: var(--color-surface);
}

/* Feed */
.feed {
  flex: 1;
  overflow-y: auto;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
}
.feed__empty {
  margin: auto;
  text-align: center;
  color: var(--color-ink-soft);
  font-size: 0.9rem;
  max-width: 30ch;
}
.turn {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  margin-bottom: 12px;
}
.turn--me {
  margin-right: auto;
  border-left: 4px solid var(--color-me);
  border-top-left-radius: 4px;
}
.turn--them {
  margin-left: auto;
  border-right: 4px solid var(--color-them);
  border-top-right-radius: 4px;
  text-align: right;
}
.turn p { margin: 2px 0; }
.turn__original {
  font-size: 0.92rem;
  color: var(--color-ink-soft);
}
.turn__corrected-note {
  font-size: 0.76rem;
  font-style: italic;
  color: var(--color-ink-soft);
}
.turn__arrow {
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--color-ink-soft);
}
.turn__translated {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
}

/* Status */
.status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}
.status__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-line);
}
.status[data-state="me"] .status__dot { background: var(--color-me); animation: pulse 1s infinite; }
.status[data-state="them"] .status__dot { background: var(--color-them); animation: pulse 1s infinite; }
.status[data-state="busy"] .status__dot { background: var(--color-ink-soft); animation: pulse 0.8s infinite; }
.status[data-state="success"] .status__dot { background: var(--color-success); }
.status[data-state="error"] .status__dot { background: var(--color-error); }
.status[data-state="error"] .status__text { color: var(--color-error); }

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.5; }
}

/* Talk buttons */
.talk-zone {
  display: flex;
  gap: 14px;
  padding: 14px 20px 18px;
}
.talk-btn {
  flex: 1;
  aspect-ratio: 1;
  border: none;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.2s ease;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}
.talk-btn:active { transform: scale(0.96); }
.talk-btn--me {
  background: var(--color-me);
  color: #FFFFFF;
}
.talk-btn--them {
  background: var(--color-them);
  color: var(--color-them-ink);
}
.talk-btn.is-locked {
  opacity: 0.4;
  pointer-events: none;
}
.talk-btn.is-active-listening {
  animation: ring 1.1s ease-out infinite;
}
@keyframes ring {
  0% { box-shadow: 0 0 0 0 rgba(27,36,48,0.25); }
  100% { box-shadow: 0 0 0 18px rgba(27,36,48,0); }
}

/* Brand footer */
.brand-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  padding-bottom: max(10px, env(safe-area-inset-bottom));
  background: var(--color-bg);
  border-top: 1px solid var(--color-line);
}
.brand-footer__logo { display: block; height: 22px; width: auto; }
.brand-footer__text {
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--color-ink-soft);
}

/* Accessibility */
:focus-visible {
  outline: 2px solid var(--color-me);
  outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
  .status__dot, .talk-btn.is-active-listening { animation: none !important; }
  .talk-btn:active { transform: none; }
}

@media (min-width: 540px) {
  body { padding: 24px 0; }
}