/**
 * Dr. Anil Kumar's Eye Hospital ("drakeh") Buttons Component
 * ==========================================================
 * Compliant with Section J.8 & Step 2:
 * - Primary CTA: solid blue with real color shifts and translateY(-1px)
 * - Secondary / Text: link-style button with animated directional arrow
 * - Outline: bordered neutral button
 * - Emergency: high-visibility red CTA
 * - Tap target >= 44px, min-height 48px on form/action buttons
 * - Complete hover, focus-visible, active, and disabled states.
 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  min-width: 44px;
  max-width: 100%;
  font-family: var(--font-body);
  font-weight: var(--fw-semibold);
  font-size: var(--fs-base);
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius-md);
  padding: 0.75rem 1.4rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

@media (max-width: 400px) {
  .btn {
    white-space: normal;
    padding: 0.6rem 0.9rem;
    font-size: var(--fs-sm);
  }
}

.btn:focus {
  outline: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-blue-600);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
 * Primary Button (e.g. "Book an appointment")
 * ----------------------------------------------------------------------- */
.btn-primary {
  background-color: var(--color-blue-600);
  border-color: var(--color-blue-600);
  color: #FFFFFF;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-blue-700);
  border-color: var(--color-blue-700);
  color: #FFFFFF;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  background-color: var(--color-blue-800);
  border-color: var(--color-blue-800);
  color: #FFFFFF;
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-primary:disabled,
.btn-primary[aria-disabled="true"] {
  background-color: #94A3B8;
  border-color: #94A3B8;
  color: #F1F5F9;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* --------------------------------------------------------------------------
 * Text / Link-Style Button with Arrow (e.g. "Meet our doctors →")
 * ----------------------------------------------------------------------- */
.btn-text,
.btn-secondary {
  background-color: transparent;
  border-color: transparent;
  color: var(--color-blue-600);
  padding: 0.75rem 0.5rem;
  font-weight: var(--fw-semibold);
}

.btn-text .btn-arrow,
.btn-secondary .btn-arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
}

.btn-text:hover,
.btn-secondary:hover {
  background-color: transparent;
  color: var(--color-blue-700);
  text-decoration: none;
}

.btn-text:hover .btn-arrow,
.btn-secondary:hover .btn-arrow {
  transform: translateX(4px);
}

.btn-text:active,
.btn-secondary:active {
  color: var(--color-blue-800);
}

.btn-text:disabled,
.btn-text[aria-disabled="true"],
.btn-secondary:disabled,
.btn-secondary[aria-disabled="true"] {
  color: #94A3B8;
  cursor: not-allowed;
}

.btn-text:disabled .btn-arrow,
.btn-secondary:disabled .btn-arrow {
  transform: none;
}

/* --------------------------------------------------------------------------
 * Outline Neutral Button
 * ----------------------------------------------------------------------- */
.btn-outline {
  background-color: transparent;
  border-color: var(--color-navy-900);
  color: var(--color-navy-900);
}

.btn-outline:hover {
  background-color: var(--color-navy-900);
  color: #FFFFFF;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-outline:active {
  background-color: var(--color-navy-800);
  transform: translateY(0);
}

.btn-outline:disabled,
.btn-outline[aria-disabled="true"] {
  border-color: #CBD5E1;
  color: #94A3B8;
  cursor: not-allowed;
  transform: none;
}

/* --------------------------------------------------------------------------
 * Emergency Action Button
 * ----------------------------------------------------------------------- */
.btn-emergency {
  background-color: #DC2626;
  border-color: #B91C1C;
  color: #FFFFFF;
  font-weight: 600;
}

.btn-emergency:hover {
  background-color: #B91C1C;
  border-color: #991B1B;
  color: #FFFFFF;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-emergency:active {
  background-color: #991B1B;
  transform: translateY(0);
}

/* White Button (for Dark/Navy bands) */
.btn-white {
  background-color: #FFFFFF;
  border-color: #FFFFFF;
  color: var(--color-navy-900);
  box-shadow: var(--shadow-sm);
}

.btn-white:hover {
  background-color: #F8FAFC;
  color: var(--color-blue-700);
  text-decoration: none;
  transform: translateY(-1px);
}

/* Full Width Submit Button */
.btn-submit,
.btn-block {
  width: 100%;
  display: flex;
  justify-content: center;
}

/* --------------------------------------------------------------------------
 * Size Variants
 * ----------------------------------------------------------------------- */
.btn-sm {
  min-height: 44px;
  padding: 0.4rem 0.85rem;
  font-size: var(--fs-sm);
  border-radius: var(--radius-sm);
}

.btn-lg {
  min-height: 52px;
  padding: 1rem 2.2rem;
  font-size: var(--fs-md);
  border-radius: var(--radius-lg);
}

/* --------------------------------------------------------------------------
 * Sticky Floating Action Buttons (Call & WhatsApp)
 * ----------------------------------------------------------------------- */
.floating-contact-bar {
  position: fixed;
  bottom: calc(24px + env(safe-area-inset-bottom, 0px));
  right: calc(24px + env(safe-area-inset-right, 0px));
  z-index: 999;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
  pointer-events: none;
}

.floating-contact-btn {
  pointer-events: auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25), 0 2px 6px rgba(0, 0, 0, 0.15);
  text-decoration: none;
  transition: transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease, background-color 0.2s ease;
  outline: none;
}

.floating-contact-btn:hover {
  transform: scale(1.1) translateY(-2px);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.32), 0 3px 8px rgba(0, 0, 0, 0.2);
  text-decoration: none;
}

.floating-contact-btn:active {
  transform: scale(0.95);
}

.floating-contact-btn:focus-visible {
  outline: 3px solid #0565E6;
  outline-offset: 3px;
}

/* Call Button - Medical Blue */
.floating-btn-call {
  background-color: #0565E6;
  color: #FFFFFF;
}

.floating-btn-call:hover {
  background-color: #044ebb;
  color: #FFFFFF;
}

/* WhatsApp Button - Official WhatsApp Green */
.floating-btn-whatsapp {
  background-color: #25D366;
  color: #FFFFFF;
}

.floating-btn-whatsapp:hover {
  background-color: #20ba5a;
  color: #FFFFFF;
}

.floating-btn-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.2s ease;
}

.floating-contact-btn:hover .floating-btn-icon {
  transform: scale(1.08);
}

/* Subtle Hover Tooltip on Desktop */
.floating-btn-label {
  position: absolute;
  right: 64px;
  top: 50%;
  transform: translateY(-50%) translateX(6px);
  background: rgba(7, 46, 72, 0.94);
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.floating-btn-label::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -5px;
  transform: translateY(-50%);
  border-width: 5px 0 5px 5px;
  border-style: solid;
  border-color: transparent transparent transparent rgba(7, 46, 72, 0.94);
}

.floating-contact-btn:hover .floating-btn-label,
.floating-contact-btn:focus-visible .floating-btn-label {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

/* Mobile responsive adjustments */
@media (max-width: 640px) {
  .floating-contact-bar {
    bottom: calc(18px + env(safe-area-inset-bottom, 0px));
    right: calc(16px + env(safe-area-inset-right, 0px));
    gap: 12px;
  }
  .floating-contact-btn {
    width: 48px;
    height: 48px;
  }
  .floating-btn-icon svg {
    width: 22px;
    height: 22px;
  }
  .floating-btn-label {
    display: none;
  }
}