/* ===== Buttons ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: 48px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: 1;
  transition: background-color var(--transition-fast),
              transform 100ms ease,
              box-shadow var(--transition-fast);
  text-align: center;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

.btn:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn--secondary:hover {
  background: var(--color-primary-bg);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn--ghost:hover {
  color: var(--color-text);
  background: var(--color-primary-bg);
}

.btn--full {
  width: 100%;
}

.btn--lg {
  min-height: 56px;
  padding: 16px 32px;
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
}

/* ===== Cards ===== */

.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-lg);
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.card--interactive {
  cursor: pointer;
}

.card--interactive:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card--interactive:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.card__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-md);
  color: var(--color-primary);
}

.card__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  text-align: center;
}

/* ===== Badge ===== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge--normal   { background: var(--color-normal-bg);   color: var(--color-normal); }
.badge--mild     { background: var(--color-mild-bg);     color: var(--color-mild); }
.badge--moderate { background: var(--color-moderate-bg); color: var(--color-moderate); }
.badge--severe   { background: var(--color-severe-bg);   color: var(--color-severe); }

/* ===== Progress Steps ===== */

.steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: var(--space-md) 0;
}

.steps__item {
  display: flex;
  align-items: center;
  gap: 0;
}

.steps__dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  background: var(--color-surface);
  transition: all var(--transition-normal);
  flex-shrink: 0;
}

.steps__dot--active {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.steps__dot--completed {
  border-color: var(--color-normal);
  background: var(--color-normal);
  color: #fff;
}

.steps__line {
  width: 40px;
  height: 2px;
  background: var(--color-border);
  transition: background var(--transition-normal);
}

.steps__line--completed {
  background: var(--color-normal);
}

/* ===== Gauge ===== */

.gauge {
  position: relative;
  width: 100%;
  height: 10px;
  border-radius: var(--radius-full);
  background: linear-gradient(to right, var(--color-severe), var(--color-moderate), var(--color-mild), var(--color-normal));
  margin: var(--space-lg) 0;
}

.gauge__marker {
  position: absolute;
  top: 50%;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 3px solid var(--color-text);
  transform: translate(-50%, -50%);
  box-shadow: var(--shadow-sm);
  transition: left var(--transition-slow);
}

.gauge__labels {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-xs);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ===== Spinner ===== */

.spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto;
}

.spinner__ring {
  position: absolute;
  border-radius: 50%;
  border: 3px solid transparent;
  border-top-color: var(--color-primary);
  animation: spin 1.2s linear infinite;
}

.spinner__ring:nth-child(1) {
  width: 80px;
  height: 80px;
}

.spinner__ring:nth-child(2) {
  width: 60px;
  height: 60px;
  animation-delay: 0.15s;
  border-top-color: var(--color-primary-light);
}

.spinner__ring:nth-child(3) {
  width: 40px;
  height: 40px;
  animation-delay: 0.3s;
  border-top-color: var(--color-primary-bg);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Alert / Disclaimer ===== */

.alert {
  display: flex;
  gap: var(--space-sm);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.alert--info {
  background: var(--color-primary-bg);
  color: var(--color-text-secondary);
  border-left: 4px solid var(--color-primary-light);
}

.alert--error {
  background: var(--color-error-bg);
  color: var(--color-error);
  border-left: 4px solid var(--color-error);
}

.alert--warning {
  background: var(--color-mild-bg);
  color: var(--color-text-secondary);
  border-left: 4px solid var(--color-mild);
}

.alert__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

/* ===== Language Toggle ===== */

.lang-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
}

.lang-toggle__option {
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-toggle__option--active {
  background: var(--color-primary);
  color: #fff;
}

.lang-toggle__divider {
  color: var(--color-border);
}

/* ===== Image Preview ===== */

.image-preview {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--color-border);
}

.image-preview img {
  width: 100%;
  max-height: 50vh;
  object-fit: contain;
}

/* ===== Instruction Box ===== */

.instruction-box {
  background: var(--color-primary-bg);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-md);
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.instruction-box__icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  color: var(--color-primary);
}

.instruction-box__text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}