/**
 * SV Booking Calendar - Frontend Styles
 * BEM methodology, CSS Custom Properties, Mobile-First
 */

/* CSS Custom Properties */
:root {
  --sv-color-free: #22c55e;
  --sv-color-requested: #f59e0b;
  --sv-color-confirmed: #ef4444;
  --sv-color-rejected: #6b7280;
  --sv-color-blocked: #6b7280;
  
  --sv-color-primary: #1e40af;
  --sv-color-text: #374151;
  --sv-color-text-light: #6b7280;
  --sv-color-bg: #ffffff;
  --sv-color-bg-light: #f9fafb;
  --sv-color-border: #e5e7eb;
  --sv-color-focus: #3b82f6;
  
  --sv-border-radius: 0.375rem;
  --sv-border-radius-lg: 0.5rem;
  --sv-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --sv-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  --sv-spacing-xs: 0.25rem;
  --sv-spacing-sm: 0.5rem;
  --sv-spacing-md: 1rem;
  --sv-spacing-lg: 1.5rem;
  --sv-spacing-xl: 2rem;
  
  --sv-font-size-sm: 0.875rem;
  --sv-font-size-base: 1rem;
  --sv-font-size-lg: 1.125rem;
  --sv-font-size-xl: 1.25rem;
  
  --sv-transition: all 0.15s ease-in-out;
}

/* Update colors from WordPress options - wird per JavaScript gesetzt */
/* .sv-booking-calendar[data-colors] wird durch JS updateColors() überschrieben */

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  :root {
    --sv-transition: none;
  }
}

/* Calendar Container */
.sv-booking-calendar {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  max-width: 100%;
  margin: 0 auto;
  background: var(--sv-color-bg);
  border: 1px solid var(--sv-color-border);
  border-radius: var(--sv-border-radius-lg);
  overflow: hidden;
  box-shadow: var(--sv-shadow);
}

/* Calendar Header */
.sv-booking-calendar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sv-spacing-lg);
  background: var(--sv-color-bg-light);
  border-bottom: 1px solid var(--sv-color-border);
}

.sv-booking-calendar__title {
  font-size: var(--sv-font-size-xl);
  font-weight: 600;
  color: var(--sv-color-text);
  margin: 0;
}

.sv-booking-calendar__nav {
  display: flex;
  gap: var(--sv-spacing-sm);
}

.sv-booking-calendar__nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: var(--sv-color-bg);
  border: 1px solid var(--sv-color-border);
  border-radius: var(--sv-border-radius);
  color: var(--sv-color-text);
  cursor: pointer;
  transition: var(--sv-transition);
  text-decoration: none;
}

.sv-booking-calendar__nav-btn:hover,
.sv-booking-calendar__nav-btn:focus {
  background: var(--sv-color-primary);
  color: white;
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.sv-booking-calendar__nav-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.sv-booking-calendar__nav-btn:disabled:hover {
  background: var(--sv-color-bg);
  color: var(--sv-color-text);
  box-shadow: none;
}

/* Calendar Grid */
.sv-booking-calendar__grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  background: var(--sv-color-border);
}

.sv-booking-calendar__weekday {
  padding: var(--sv-spacing-md);
  text-align: center;
  font-size: var(--sv-font-size-sm);
  font-weight: 600;
  color: var(--sv-color-text-light);
  background: var(--sv-color-bg-light);
}

.sv-booking-calendar__day {
  position: relative;
  min-height: 4rem;
  padding: var(--sv-spacing-sm);
  background: var(--sv-color-bg);
  cursor: pointer;
  transition: var(--sv-transition);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
}

.sv-booking-calendar__day:hover {
  background: var(--sv-color-bg-light);
}

.sv-booking-calendar__day:focus {
  outline: 2px solid var(--sv-color-focus);
  outline-offset: -2px;
  z-index: 1;
}

.sv-booking-calendar__day--other-month {
  opacity: 0.3;
  cursor: default;
}

.sv-booking-calendar__day--other-month:hover {
  background: var(--sv-color-bg);
}

.sv-booking-calendar__day--today {
  background: rgba(59, 130, 246, 0.1);
}

.sv-booking-calendar__day--free {
  border-left: 4px solid var(--sv-color-free);
}

.sv-booking-calendar__day--requested {
  border-left: 4px solid var(--sv-color-requested);
  cursor: default;
}

.sv-booking-calendar__day--confirmed {
  border-left: 4px solid var(--sv-color-confirmed);
  cursor: default;
}

.sv-booking-calendar__day--rejected {
  border-left: 4px solid var(--sv-color-rejected);
  cursor: default;
}

.sv-booking-calendar__day--blocked {
  border-left: 4px solid var(--sv-color-blocked);
  cursor: default;
  background: repeating-linear-gradient(
    45deg,
    var(--sv-color-bg),
    var(--sv-color-bg) 10px,
    var(--sv-color-bg-light) 10px,
    var(--sv-color-bg-light) 20px
  );
}

.sv-booking-calendar__day-number {
  font-size: var(--sv-font-size-base);
  font-weight: 500;
  color: var(--sv-color-text);
  line-height: 1;
  margin-bottom: var(--sv-spacing-xs);
}

.sv-booking-calendar__day-times {
  font-size: var(--sv-font-size-sm);
  color: var(--sv-color-text-light);
  line-height: 1.2;
  word-break: break-word;
}

/* Calendar Legend */
.sv-booking-calendar__legend {
  padding: var(--sv-spacing-lg);
  background: var(--sv-color-bg-light);
  border-top: 1px solid var(--sv-color-border);
}

.sv-booking-calendar__legend-title {
  font-size: var(--sv-font-size-base);
  font-weight: 600;
  color: var(--sv-color-text);
  margin: 0 0 var(--sv-spacing-md) 0;
}

.sv-booking-calendar__legend-items {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sv-spacing-lg);
}

.sv-booking-calendar__legend-item {
  display: flex;
  align-items: center;
  gap: var(--sv-spacing-sm);
  font-size: var(--sv-font-size-sm);
}

.sv-booking-calendar__legend-color {
  width: 1rem;
  height: 1rem;
  border-radius: var(--sv-border-radius);
  flex-shrink: 0;
}

.sv-booking-calendar__legend-color--free {
  background: var(--sv-color-free);
}

.sv-booking-calendar__legend-color--requested {
  background: var(--sv-color-requested);
}

.sv-booking-calendar__legend-color--confirmed {
  background: var(--sv-color-confirmed);
}

.sv-booking-calendar__legend-color--blocked {
  background: var(--sv-color-blocked);
}

/* Modal */
.sv-booking-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  padding: var(--sv-spacing-md);
  opacity: 0;
  visibility: hidden;
  transition: var(--sv-transition);
}

.sv-booking-modal.is-active {
  opacity: 1;
  visibility: visible;
}

.sv-booking-modal__dialog {
  background: var(--sv-color-bg);
  border-radius: var(--sv-border-radius-lg);
  box-shadow: var(--sv-shadow-lg);
  width: 100%;
  max-width: 560px; /* moderat, gut lesbar */
  max-height: 90vh;
  overflow: auto;
  transform: scale(0.96);
  transition: var(--sv-transition);
}

.sv-booking-modal.is-active .sv-booking-modal__dialog {
  transform: scale(1);
}

.sv-booking-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sv-spacing-lg);
  border-bottom: 1px solid var(--sv-color-border);
}

.sv-booking-modal__title {
  font-size: var(--sv-font-size-lg);
  font-weight: 600;
  color: var(--sv-color-text);
  margin: 0;
}

.sv-booking-modal__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  background: none;
  border: none;
  border-radius: var(--sv-border-radius);
  color: var(--sv-color-text-light);
  cursor: pointer;
  transition: var(--sv-transition);
}

.sv-booking-modal__close:hover,
.sv-booking-modal__close:focus {
  background: var(--sv-color-bg-light);
  color: var(--sv-color-text);
  outline: none;
}

.sv-booking-modal__body {
  padding: var(--sv-spacing-lg);
}

.sv-booking-modal__footer {
  display: flex;
  gap: var(--sv-spacing-md);
  justify-content: flex-end;
  padding: var(--sv-spacing-lg);
  border-top: 1px solid var(--sv-color-border);
}

/* Form Styles */
.sv-booking-form {
  display: grid;
  gap: var(--sv-spacing-lg);
}

.sv-booking-form__group {
  display: grid;
  gap: var(--sv-spacing-sm);
}

.sv-booking-form__label {
  font-size: var(--sv-font-size-sm);
  font-weight: 600;
  color: var(--sv-color-text);
  display: flex;
  align-items: center;
  gap: var(--sv-spacing-xs);
}

.sv-booking-form__label--required::after {
  content: "*";
  color: #ef4444;
}

.sv-booking-form__input,
.sv-booking-form__textarea,
.sv-booking-form__select {
  width: 100%;
  padding: var(--sv-spacing-md);
  border: 1px solid var(--sv-color-border);
  border-radius: var(--sv-border-radius);
  font-size: var(--sv-font-size-base);
  transition: var(--sv-transition);
  background: var(--sv-color-bg);
}

.sv-booking-form__input:focus,
.sv-booking-form__textarea:focus,
.sv-booking-form__select:focus {
  outline: none;
  border-color: var(--sv-color-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.sv-booking-form__input--error,
.sv-booking-form__textarea--error,
.sv-booking-form__select--error {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.sv-booking-form__textarea {
  resize: vertical;
  min-height: 6rem;
}

.sv-booking-form__help {
  font-size: var(--sv-font-size-sm);
  color: var(--sv-color-text-light);
}

.sv-booking-form__error {
  font-size: var(--sv-font-size-sm);
  color: #ef4444;
  margin-top: var(--sv-spacing-xs);
}

.sv-booking-form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sv-spacing-md);
}

.sv-booking-form__checkbox {
  display: flex;
  align-items: flex-start;
  gap: var(--sv-spacing-sm);
}

.sv-booking-form__checkbox input[type="checkbox"] {
  margin-top: 0.125rem;
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.sv-booking-form__checkbox-label {
  font-size: var(--sv-font-size-sm);
  color: var(--sv-color-text);
  line-height: 1.4;
}

.sv-booking-form__checkbox-label a {
  color: var(--sv-color-primary);
  text-decoration: none;
}

.sv-booking-form__checkbox-label a:hover {
  text-decoration: underline;
}

.sv-booking-form__captcha {
  display: flex;
  align-items: center;
  gap: var(--sv-spacing-md);
  padding: var(--sv-spacing-md);
  background: var(--sv-color-bg-light);
  border: 1px solid var(--sv-color-border);
  border-radius: var(--sv-border-radius);
}

.sv-booking-form__captcha-question {
  font-weight: 600;
  color: var(--sv-color-text);
}

.sv-booking-form__captcha-input {
  width: 4rem;
  margin: 0;
}

/* Buttons */
.sv-booking-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sv-spacing-sm);
  padding: var(--sv-spacing-md) var(--sv-spacing-lg);
  border: 1px solid transparent;
  border-radius: var(--sv-border-radius);
  font-size: var(--sv-font-size-base);
  font-weight: 500;
  cursor: pointer;
  transition: var(--sv-transition);
  text-decoration: none;
  line-height: 1;
  min-height: 2.75rem;
}

.sv-booking-btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.sv-booking-btn--primary {
  background: var(--sv-color-primary);
  color: white;
}

.sv-booking-btn--primary:hover:not(:disabled) {
  background: #1d4ed8;
}

.sv-booking-btn--secondary {
  background: var(--sv-color-bg);
  border-color: var(--sv-color-border);
  color: var(--sv-color-text);
}

.sv-booking-btn--secondary:hover:not(:disabled) {
  background: var(--sv-color-bg-light);
}

.sv-booking-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.sv-booking-btn--loading {
  pointer-events: none;
}

.sv-booking-btn__spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: sv-spin 1s linear infinite;
}

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

/* Messages */
.sv-booking-message {
  padding: var(--sv-spacing-lg);
  border-radius: var(--sv-border-radius);
  margin-bottom: var(--sv-spacing-lg);
}

.sv-booking-message--success {
  background: #d1fae5;
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.sv-booking-message--error {
  background: #fee2e2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

.sv-booking-message--info {
  background: #dbeafe;
  border: 1px solid #bfdbfe;
  color: #1e40af;
}

/* Loading States */
.sv-booking-calendar--loading {
  opacity: 0.6;
  pointer-events: none;
}

.sv-booking-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sv-spacing-xl);
}

.sv-booking-spinner__icon {
  width: 2rem;
  height: 2rem;
  border: 3px solid var(--sv-color-border);
  border-top-color: var(--sv-color-primary);
  border-radius: 50%;
  animation: sv-spin 1s linear infinite;
}

/* Tooltip */
.sv-booking-tooltip {
  position: absolute;
  z-index: 1000;
  padding: var(--sv-spacing-sm) var(--sv-spacing-md);
  background: var(--sv-color-text);
  color: white;
  font-size: var(--sv-font-size-sm);
  border-radius: var(--sv-border-radius);
  box-shadow: var(--sv-shadow);
  opacity: 0;
  visibility: hidden;
  transition: var(--sv-transition);
  pointer-events: none;
  white-space: nowrap;
  max-width: 200px;
  white-space: normal;
  word-wrap: break-word;
}

.sv-booking-tooltip.is-visible {
  opacity: 1;
  visibility: visible;
}

.sv-booking-tooltip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: var(--sv-color-text);
}

/* Responsive Design */
@media (max-width: 640px) {
  .sv-booking-calendar__header {
    flex-direction: column;
    gap: var(--sv-spacing-md);
    text-align: center;
  }
  
  .sv-booking-calendar__day {
    min-height: 3rem;
    padding: var(--sv-spacing-xs);
  }
  
  .sv-booking-calendar__day-times {
    font-size: 0.75rem;
  }
  
  .sv-booking-calendar__legend-items {
    flex-direction: column;
    gap: var(--sv-spacing-sm);
  }
  
  .sv-booking-form__row {
    grid-template-columns: 1fr;
  }
  
  .sv-booking-modal {
    padding: var(--sv-spacing-sm);
  }
  
  .sv-booking-modal__dialog {
    max-height: 95vh;
  }
  
  .sv-booking-modal__header,
  .sv-booking-modal__body,
  .sv-booking-modal__footer {
    padding: var(--sv-spacing-md);
  }
  
  .sv-booking-modal__footer {
    flex-direction: column-reverse;
  }
  
  .sv-booking-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .sv-booking-calendar__grid {
    font-size: var(--sv-font-size-sm);
  }
  
  .sv-booking-calendar__weekday {
    padding: var(--sv-spacing-sm);
  }
  
  .sv-booking-calendar__day {
    min-height: 2.5rem;
  }
  
  .sv-booking-calendar__day-number {
    font-size: var(--sv-font-size-sm);
  }
  
  .sv-booking-calendar__day-times {
    display: none;
  }
}

/* Print Styles */
@media print {
  .sv-booking-calendar__nav,
  .sv-booking-modal,
  .sv-booking-btn {
    display: none !important;
  }
  
  .sv-booking-calendar {
    box-shadow: none;
    border: 1px solid #000;
  }
  
  .sv-booking-calendar__day {
    border: 1px solid #ddd !important;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --sv-color-border: #000000;
    --sv-color-text: #000000;
    --sv-color-text-light: #000000;
    --sv-color-bg: #ffffff;
    --sv-color-bg-light: #f0f0f0;
  }
  
  .sv-booking-calendar__day {
    border: 1px solid var(--sv-color-border);
  }
}

/* Focus Visible Support */
.sv-booking-calendar__day:focus-visible,
.sv-booking-btn:focus-visible,
.sv-booking-form__input:focus-visible,
.sv-booking-form__textarea:focus-visible,
.sv-booking-form__select:focus-visible {
  outline: 2px solid var(--sv-color-focus);
  outline-offset: 2px;
}

/* Animation for status changes */
.sv-booking-calendar__day {
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.sv-booking-calendar__day.status-updated {
  animation: sv-status-pulse 0.6s ease-in-out;
}

@keyframes sv-status-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

/* Screen Reader Only */
.sv-booking-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip to content link */
.sv-booking-skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--sv-color-primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: var(--sv-border-radius);
  z-index: 10000;
}

.sv-booking-skip-link:focus {
  top: 6px;
}