/* =========================================================
   components.css — Buttons, Cards, Badges, & UI Components
   Dra. Erika Piedrahita — Medical Epigenetics Website
   ========================================================= */

/* ---------------------------------------------------------
   1. BUTTONS
   --------------------------------------------------------- */

/* Base button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.8125rem 1.75rem;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--transition-base),
              border-color var(--transition-base),
              color var(--transition-base),
              transform var(--transition-fast),
              box-shadow var(--transition-base);
  -webkit-tap-highlight-color: transparent;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Primary — gold */
.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  box-shadow: 0 4px 14px rgba(196,168,130,0.35);
}

.btn--primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: 0 6px 20px rgba(196,168,130,0.45);
}

/* Secondary — outline */
.btn--secondary {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--secondary:hover {
  background-color: var(--color-surface);
  border-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

/* Ghost (text only) */
.btn--ghost {
  background-color: transparent;
  color: var(--color-primary);
  border-color: transparent;
  padding-inline: var(--space-4);
}

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

/* WhatsApp button */
.btn--whatsapp {
  background-color: #25D366;
  color: var(--color-white);
  border-color: #25D366;
  box-shadow: 0 4px 16px rgba(37,211,102,0.35);
  font-size: var(--text-base);
  padding: 1rem 2rem;
}

.btn--whatsapp:hover {
  background-color: #1ebe5d;
  border-color: #1ebe5d;
  box-shadow: 0 6px 22px rgba(37,211,102,0.45);
}

/* Dark button (for CTA section) */
.btn--dark-outline {
  background-color: transparent;
  color: rgba(255,255,255,0.8);
  border-color: rgba(255,255,255,0.3);
}

.btn--dark-outline:hover {
  background-color: rgba(255,255,255,0.08);
  color: var(--color-white);
  border-color: rgba(255,255,255,0.6);
}

/* Size variants */
.btn--sm {
  font-size: var(--text-xs);
  padding: 0.5rem 1.25rem;
}

.btn--lg {
  font-size: var(--text-base);
  padding: 1.0625rem 2.25rem;
}

/* ---------------------------------------------------------
   2. BADGES / PILLS
   --------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-full);
}

.badge--primary {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.badge--accent {
  background-color: var(--color-accent-light);
  color: #7A5A6E;
}

.badge--surface {
  background-color: var(--color-surface);
  color: var(--color-text-muted);
}

/* ---------------------------------------------------------
   3. EPIGENETICS ICON CARDS
   --------------------------------------------------------- */
.epi-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

.epi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.epi-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.epi-card:hover::before {
  opacity: 1;
}

.epi-card__icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent-light));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  transition: transform var(--transition-base);
}

.epi-card:hover .epi-card__icon {
  transform: scale(1.08) rotate(-3deg);
}

.epi-card__icon svg {
  width: 30px;
  height: 30px;
  color: var(--color-primary-dark);
}

.epi-card__number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary-light);
  line-height: 1;
  margin-bottom: var(--space-2);
}

.epi-card__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.epi-card__text {
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-text-muted);
}

/* ---------------------------------------------------------
   4. SERVICE CARDS
   --------------------------------------------------------- */
.service-card {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base),
              box-shadow var(--transition-base),
              background-color var(--transition-base),
              border-color var(--transition-base);
  position: relative;
  overflow: visible;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.service-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(196,168,130,0.04), rgba(212,184,199,0.04));
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 0;
  pointer-events: none;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-light);
  background-color: #FFFCF8;
}

.service-card:hover::after {
  opacity: 1;
}

.service-card__icon-wrap {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.service-card:hover .service-card__icon-wrap {
  transform: scale(1.05) rotate(-4deg);
}

.service-card__icon-wrap svg {
  width: 34px;
  height: 34px;
}

/* Color variants */
.service-card--gold .service-card__icon-wrap {
  background: linear-gradient(135deg, #F5EDD8, var(--color-primary-light));
}

.service-card--gold .service-card__icon-wrap svg {
  color: #9A7040;
}

.service-card--rose .service-card__icon-wrap {
  background: linear-gradient(135deg, #F5E8F0, var(--color-accent-light));
}

.service-card--rose .service-card__icon-wrap svg {
  color: #8A5A78;
}

.service-card--sage .service-card__icon-wrap {
  background: linear-gradient(135deg, #E8F2ED, #C8E0D0);
}

.service-card--sage .service-card__icon-wrap svg {
  color: #3A7A58;
}

.service-card--blue .service-card__icon-wrap {
  background: linear-gradient(135deg, #E8EFF8, #C8D8F0);
}

.service-card--blue .service-card__icon-wrap svg {
  color: #3A5A8A;
}

.service-card__tag {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  position: relative;
  z-index: 1;
}

.service-card__title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.25;
  position: relative;
  z-index: 1;
}

.service-card__desc {
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-text-muted);
  position: relative;
  z-index: 1;
}

.service-card__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  margin-top: var(--space-4);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  z-index: 2;
}

.service-card__toggle:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(196,168,130,0.2);
}

.service-card__toggle .toggle-icon {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.service-card__toggle[aria-expanded="true"] .toggle-icon {
  transform: rotate(180deg);
}

.service-card__details {
  margin-top: 0;
  overflow: hidden;
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
}

.service-card__details[hidden] {
  display: block;
  max-height: 0;
  margin-top: 0;
  opacity: 0;
}

.service-card__details:not([hidden]) {
  max-height: 500px;
  margin-top: var(--space-4);
  opacity: 1;
}

.service-card__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.service-card__feature {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.service-card__feature svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
  flex-shrink: 0;
}

.service-card__footer {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-4);
  position: relative;
  z-index: 2;
}

.service-card__price {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--color-text);
  font-size: var(--text-base);
  position: relative;
  z-index: 2;
}

.service-card__price-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) var(--space-5);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-base);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 4px 14px rgba(196,168,130,0.35);
  position: relative;
  z-index: 3;
  cursor: pointer;
}

.service-card__price-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(196,168,130,0.45);
}

.service-card__price-link svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* ---------------------------------------------------------
   5. STATS BAR (optional internal use)
   --------------------------------------------------------- */
.stats-bar {
  background-color: var(--color-primary);
  padding-block: var(--space-6);
}

.stats-bar__grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-12);
}

.stats-bar__item {
  text-align: center;
}

.stats-bar__number {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1;
  display: block;
}

.stats-bar__label {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.75);
  margin-top: var(--space-1);
}

.stats-bar__divider {
  width: 1px;
  height: 48px;
  background-color: rgba(255,255,255,0.25);
}

@media (max-width: 600px) {
  .stats-bar__divider { display: none; }
  .stats-bar__grid { gap: var(--space-8); }
}

/* ---------------------------------------------------------
   6. LINK WITH ARROW
   --------------------------------------------------------- */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  color: var(--color-primary);
  font-size: var(--text-sm);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.link-arrow svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.link-arrow:hover {
  color: var(--color-primary-dark);
  gap: var(--space-3);
}

.link-arrow:hover svg {
  transform: translateX(4px);
}

/* White variant */
.link-arrow--white {
  color: rgba(255,255,255,0.75);
}

.link-arrow--white:hover {
  color: var(--color-white);
}

/* ---------------------------------------------------------
   7. INFO / HIGHLIGHT BOXES
   --------------------------------------------------------- */
.info-box {
  background-color: var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-4) var(--space-6);
}

.info-box p {
  color: var(--color-text);
  font-size: var(--text-sm);
  line-height: 1.65;
}

/* ---------------------------------------------------------
   8. ICON WRAPPER UTILITY
   --------------------------------------------------------- */
.icon-circle {
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.icon-circle--sm {
  width: 36px;
  height: 36px;
}

.icon-circle--md {
  width: 48px;
  height: 48px;
}

.icon-circle--lg {
  width: 64px;
  height: 64px;
}

.icon-circle--primary {
  background-color: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.icon-circle--accent {
  background-color: var(--color-accent-light);
  color: #7A5A6E;
}

/* ---------------------------------------------------------
   9. FORMS (Contact / Appointment)
   --------------------------------------------------------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.form-input,
.form-textarea {
  background-color: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(196,168,130,0.2);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* ---------------------------------------------------------
   10. SCROLL PROGRESS BAR
   --------------------------------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: calc(var(--z-sticky) + 10);
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 50ms linear;
  border-radius: 0 2px 2px 0;
}

/* ---------------------------------------------------------
   11. BACK-TO-TOP BUTTON
   --------------------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: calc(var(--space-6) + 68px);
  right: var(--space-6);
  z-index: var(--z-float);
  width: 44px;
  height: 44px;
  background-color: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition-base), transform var(--transition-base),
              background-color var(--transition-fast), border-color var(--transition-fast);
  pointer-events: none;
}

.back-to-top.is-visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.back-to-top:hover svg {
  color: var(--color-white);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

@media (max-width: 480px) {
  .back-to-top {
    bottom: calc(var(--space-4) + 62px);
    right: var(--space-4);
    width: 40px;
    height: 40px;
  }
}