/* ==========================================================================
   COMPONENTS — buttons, badges, cards, accordion, forms, carousel
   ========================================================================== */

/* ---------------------------------------------------------------------
   Buttons
   --------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-tight);
  text-align: center;
  transition: background-color var(--duration-fast) var(--ease-standard),
    color var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: var(--color-brand-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}

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

.btn--secondary {
  background: var(--color-bg-surface);
  color: var(--color-brand-primary);
  border: 1.5px solid var(--color-brand-primary);
}

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

.btn--ghost {
  background: transparent;
  color: var(--color-brand-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  min-height: 44px;
  padding-inline: var(--space-3);
}

.btn--ghost--inverse {
  color: var(--color-text-inverse);
}

.btn--lg {
  min-height: 52px;
  padding-inline: var(--space-7);
  font-size: var(--text-base);
}

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

/* ---------------------------------------------------------------------
   Eyebrow / badge / microcopy
   --------------------------------------------------------------------- */

.eyebrow {
  display: inline-block;
  margin: 0 0 var(--space-4);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-brand-primary);
}

.eyebrow--tech {
  font-family: var(--font-mono-tech);
  color: var(--color-tech-accent-bright);
}

.microcopy {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  max-width: 60ch;
}

.bonus-reminder {
  font-weight: 700;
  color: var(--color-brand-accent);
}

/* ---------------------------------------------------------------------
   Cards — symptom / wavelength / area
   --------------------------------------------------------------------- */

.symptom-card,
.area-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-3);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  text-align: center;
  font-weight: 600;
  font-size: var(--text-sm);
  box-shadow: var(--shadow-sm);
}

.symptom-card__icon,
.area-card__icon {
  width: 40px;
  height: 40px;
  color: var(--color-brand-primary);
}

.area-card {
  flex-direction: row;
  justify-content: flex-start;
  text-align: left;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
}

.area-card__icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.wavelength-card {
  position: relative;
  padding: var(--space-6) var(--space-5);
  background: var(--color-bg-inverse-elevated);
  border: 1px solid var(--color-border-inverse);
  border-radius: var(--radius-card-tech);
  color: var(--color-text-inverse);
}

.wavelength-card__index {
  display: block;
  font-family: var(--font-mono-tech);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-widest);
  color: var(--color-tech-accent);
  margin-bottom: var(--space-4);
}

.wavelength-card__nm {
  display: block;
  font-family: var(--font-mono-tech);
  font-weight: 600;
  font-size: var(--text-2xl);
  color: var(--color-tech-accent-bright);
  font-variant-numeric: tabular-nums;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.wavelength-card__nm small {
  font-size: var(--text-md);
  font-weight: 500;
  margin-left: var(--space-1);
  color: var(--color-tech-accent);
}

.wavelength-card h3 {
  font-family: var(--font-body);
  color: var(--color-text-inverse);
  margin-bottom: var(--space-2);
}

.wavelength-card p {
  color: var(--color-text-inverse-muted);
  font-size: var(--text-sm);
  margin: 0;
}

/* ---------------------------------------------------------------------
   Checklist
   --------------------------------------------------------------------- */

.checklist {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-6) 0;
}

@media (min-width: 560px) {
  .checklist {
    grid-template-columns: 1fr 1fr;
  }
}

.checklist li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 600;
}

.checklist__icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  padding: 3px;
  color: var(--color-text-inverse);
  background: var(--color-brand-primary);
  border-radius: var(--radius-pill);
}

/* ---------------------------------------------------------------------
   Value points (module 3)
   --------------------------------------------------------------------- */

.value-points {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-6) 0;
}

.value-points li {
  position: relative;
  padding-left: var(--space-6);
  font-weight: 600;
}

.value-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--color-brand-secondary);
  border: 2px solid var(--color-brand-primary);
}

/* ---------------------------------------------------------------------
   Accordion (FAQ)
   --------------------------------------------------------------------- */

.accordion__item {
  border-bottom: 1px solid var(--color-border);
}

.accordion__item h3 {
  margin: 0;
  font-family: var(--font-body);
  font-size: inherit;
  font-weight: inherit;
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  min-height: 56px;
  padding: var(--space-4) 0;
  text-align: left;
  font-weight: 700;
  font-size: var(--text-md);
}

.accordion__chevron {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--color-brand-primary);
  transition: transform var(--duration-fast) var(--ease-standard);
}

.accordion__trigger[aria-expanded="true"] .accordion__chevron {
  transform: rotate(180deg);
}

.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--duration-base) var(--ease-standard);
}

.accordion__panel > p {
  overflow: hidden;
  margin: 0;
  color: var(--color-text-muted);
}

.accordion__item:has(.accordion__trigger[aria-expanded="true"]) .accordion__panel {
  grid-template-rows: 1fr;
}

.accordion__item:has(.accordion__trigger[aria-expanded="true"]) .accordion__panel > p {
  padding-bottom: var(--space-4);
}

/* Fallback for browsers without :has() support: JS toggles this class too */
.accordion__panel.is-open {
  grid-template-rows: 1fr;
}

.accordion__panel.is-open > p {
  padding-bottom: var(--space-4);
}

/* ---------------------------------------------------------------------
   Forms
   --------------------------------------------------------------------- */

.consult-form {
  display: grid;
  gap: var(--space-5);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
}

.form-field {
  display: grid;
  gap: var(--space-2);
}

.form-field label,
.form-field legend {
  font-weight: 600;
  font-size: var(--text-sm);
  padding: 0;
}

.form-field input,
.form-field select,
.form-field textarea {
  min-height: 48px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-page);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
}

.form-field textarea {
  min-height: 96px;
  resize: vertical;
}

/* Invalid styling is driven entirely by the .is-invalid class that
   form-validation.js applies on submit — relying on the native :invalid
   pseudo-class here would redden every empty required field on first
   load (these inputs have no placeholder, so :not(:placeholder-shown)
   never excludes them). */
.form-field input.is-invalid {
  border-color: var(--color-error);
}

.form-field__error {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-error);
  min-height: 1em;
}

.form-field--radio-group {
  border: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: 0;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 500;
  min-height: 44px;
}

.radio-option input {
  width: 20px;
  height: 20px;
}

.form-status {
  min-height: 1.2em;
  font-weight: 700;
  color: var(--color-success);
}

.phone-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-5);
  font-weight: 700;
  font-size: var(--text-md);
  color: var(--color-brand-primary);
}

/* ---------------------------------------------------------------------
   Before / after carousel
   --------------------------------------------------------------------- */

.ba-carousel__track {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  gap: var(--space-5);
  padding-bottom: var(--space-3);
  scrollbar-width: none;
}

.ba-carousel__track::-webkit-scrollbar {
  display: none;
}

.ba-slide {
  flex: 0 0 100%;
  scroll-snap-align: center;
  margin: 0;
}

@media (min-width: 768px) {
  .ba-slide {
    flex-basis: calc(50% - var(--space-3));
  }
}

.ba-slide__images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2);
}

.ba-slide__img {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-radius: var(--radius-card);
}

.ba-slide__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ba-slide__label {
  position: absolute;
  bottom: var(--space-2);
  left: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-overlay-scrim);
  color: var(--color-text-inverse);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-sm);
}

.ba-slide figcaption {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
}

.ba-slide__courtesy {
  font-style: italic;
}

.ba-carousel__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.ba-carousel__arrow {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  background: var(--color-bg-surface);
  border: 1.5px solid var(--color-border);
  font-size: var(--text-md);
}

.ba-carousel__arrow:hover {
  background: var(--color-bg-surface-alt);
}

.ba-carousel__dots {
  display: flex;
  gap: var(--space-2);
}

.ba-carousel__dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
  background: var(--color-border);
}

.ba-carousel__dot.is-active {
  background: var(--color-brand-primary);
}

/* ---------------------------------------------------------------------
   Symptoms carousel (mobile) — native scroll-snap, no JS required
   --------------------------------------------------------------------- */

.symptoms-grid {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(132px, 1fr);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  scrollbar-width: none;
}

.symptoms-grid::-webkit-scrollbar {
  display: none;
}

.symptoms-grid > * {
  scroll-snap-align: start;
}

@media (min-width: 768px) {
  .symptoms-grid {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, 1fr);
    overflow-x: visible;
  }
}

/* ---------------------------------------------------------------------
   Areas grid
   --------------------------------------------------------------------- */

.areas-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .areas-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1024px) {
  .areas-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

/* ---------------------------------------------------------------------
   Wavelength cards layout
   --------------------------------------------------------------------- */

.wavelength-cards {
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 768px) {
  .wavelength-cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------------------------------------------------------------------
   Placeholder image treatment
   --------------------------------------------------------------------- */

.placeholder-img {
  width: 100%;
  border-radius: var(--radius-lg);
}