/* Scoped styling to prevent conflict with the host page (WordPress, Webflow, etc.) */
.nexus-scheduler-container {
  --nexus-primary: #38bdf8;
  --nexus-primary-hover: #0ea5e9;
  --nexus-bg: #0b0f19;
  --nexus-card: #111827;
  --nexus-border: #1f2937;
  --nexus-text: #f3f4f6;
  --nexus-text-secondary: #9ca3af;
  --nexus-success: #10b981;
  --nexus-error: #ef4444;
  --nexus-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  font-family: var(--nexus-font);
  background-color: var(--nexus-bg);
  color: var(--nexus-text);
  border: 1px solid var(--nexus-border);
  border-radius: 16px;
  padding: 24px;
  max-width: 850px;
  margin: 0 auto;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  box-sizing: border-box;
}

.nexus-scheduler-container * {
  box-sizing: border-box;
}

/* Header & Grid Layout */
.nexus-scheduler-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--nexus-border);
  padding-bottom: 16px;
}

.nexus-scheduler-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--nexus-text);
}

.nexus-scheduler-nav-btn {
  background: var(--nexus-card);
  border: 1px solid var(--nexus-border);
  color: var(--nexus-text);
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nexus-scheduler-nav-btn:hover:not(:disabled) {
  background: var(--nexus-border);
  border-color: var(--nexus-primary);
}

.nexus-scheduler-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Two-column layout: Calendar grid on left, Slots on right */
.nexus-scheduler-body {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
}

@media (max-width: 768px) {
  .nexus-scheduler-body {
    grid-template-columns: 1fr;
  }
}

/* Calendar month navigation */
.nexus-calendar-month-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.nexus-calendar-month-label {
  font-weight: 600;
  font-size: 1rem;
}

/* Calendar Grid */
.nexus-calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  text-align: center;
}

.nexus-calendar-day-header {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--nexus-text-secondary);
  text-transform: uppercase;
  padding: 8px 0;
}

.nexus-calendar-day {
  background: var(--nexus-card);
  border: 1px solid var(--nexus-border);
  color: var(--nexus-text);
  aspect-ratio: 1;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nexus-calendar-day:hover:not(.nexus-empty, .nexus-disabled) {
  border-color: var(--nexus-primary);
  background: rgba(56, 189, 248, 0.05);
}

.nexus-calendar-day.nexus-empty {
  background: transparent;
  border-color: transparent;
  cursor: default;
}

.nexus-calendar-day.nexus-disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

.nexus-calendar-day.nexus-today {
  border-color: var(--nexus-primary);
  font-weight: bold;
}

.nexus-calendar-day.nexus-selected {
  background: var(--nexus-primary);
  border-color: var(--nexus-primary);
  color: var(--nexus-bg);
  font-weight: bold;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
}

/* Time Slots Column */
.nexus-slots-panel {
  background: var(--nexus-card);
  border: 1px solid var(--nexus-border);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  max-height: 380px;
}

.nexus-slots-title {
  margin: 0 0 12px 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--nexus-text-secondary);
  border-bottom: 1px solid var(--nexus-border);
  padding-bottom: 8px;
}

.nexus-slots-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  overflow-y: auto;
  flex-grow: 1;
  padding-right: 4px;
}

/* Custom Scrollbar for Slots */
.nexus-slots-list::-webkit-scrollbar {
  width: 6px;
}
.nexus-slots-list::-webkit-scrollbar-track {
  background: var(--nexus-card);
}
.nexus-slots-list::-webkit-scrollbar-thumb {
  background: var(--nexus-border);
  border-radius: 3px;
}

.nexus-slot-btn {
  background: var(--nexus-bg);
  border: 1px solid var(--nexus-border);
  color: var(--nexus-text);
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.2s ease;
  text-align: center;
}

.nexus-slot-btn:hover {
  border-color: var(--nexus-primary);
  color: var(--nexus-primary);
  background: rgba(56, 189, 248, 0.05);
}

.nexus-slot-btn.nexus-selected {
  background: var(--nexus-primary);
  border-color: var(--nexus-primary);
  color: var(--nexus-bg);
}

.nexus-no-slots-msg {
  font-size: 0.85rem;
  color: var(--nexus-text-secondary);
  text-align: center;
  padding: 40px 0;
}

/* Booking Form Overlay / Screen */
.nexus-booking-form-screen {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.nexus-booking-summary-banner {
  background: rgba(56, 189, 248, 0.05);
  border: 1px dashed var(--nexus-primary);
  border-radius: 8px;
  padding: 12px;
  font-size: 0.875rem;
  color: var(--nexus-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nexus-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nexus-form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--nexus-text-secondary);
}

.nexus-form-input {
  background: var(--nexus-card);
  border: 1px solid var(--nexus-border);
  color: var(--nexus-text);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  width: 100%;
  transition: all 0.2s ease;
}

.nexus-form-input:focus {
  outline: none;
  border-color: var(--nexus-primary);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.1);
}

.nexus-form-textarea {
  resize: vertical;
  min-height: 80px;
}

.nexus-form-actions {
  display: flex;
  gap: 12px;
  margin-top: 10px;
}

.nexus-btn {
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s ease;
  flex: 1;
}

.nexus-btn-primary {
  background: var(--nexus-primary);
  border: 1px solid var(--nexus-primary);
  color: var(--nexus-bg);
}

.nexus-btn-primary:hover {
  background: var(--nexus-primary-hover);
  border-color: var(--nexus-primary-hover);
}

.nexus-btn-secondary {
  background: var(--nexus-card);
  border: 1px solid var(--nexus-border);
  color: var(--nexus-text);
}

.nexus-btn-secondary:hover {
  background: var(--nexus-border);
}

/* Success Screen */
.nexus-success-screen {
  text-align: center;
  padding: 40px 20px;
}

.nexus-success-icon {
  font-size: 3rem;
  color: var(--nexus-success);
  margin-bottom: 16px;
}

.nexus-success-title {
  margin: 0 0 8px 0;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--nexus-text);
}

.nexus-success-desc {
  font-size: 0.95rem;
  color: var(--nexus-text-secondary);
  line-height: 1.6;
  margin-bottom: 24px;
}

/* Simple Loading Spinner Scoped to widget */
.nexus-loader-container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.nexus-loader {
  border: 3px solid var(--nexus-border);
  border-top: 3px solid var(--nexus-primary);
  border-radius: 50%;
  width: 24px;
  height: 24px;
  animation: nexus-spin 0.8s linear infinite;
}

@keyframes nexus-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* DSGVO compliance label */
.nexus-compliance-footer {
  font-size: 0.72rem;
  color: var(--nexus-text-secondary);
  text-align: center;
  margin-top: 16px;
  border-top: 1px solid var(--nexus-border);
  padding-top: 12px;
}

/* Mobile Responsiveness Overrides */
@media (max-width: 480px) {
  .nexus-scheduler-container {
    padding: 16px 12px;
    border-radius: 12px;
  }
  .nexus-scheduler-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding-bottom: 12px;
    margin-bottom: 12px;
  }
  .nexus-scheduler-title {
    font-size: 1.1rem;
  }
  .nexus-calendar-month-header {
    margin-bottom: 8px;
  }
  .nexus-calendar-month-label {
    font-size: 0.9rem;
  }
  .nexus-scheduler-nav-btn {
    padding: 6px 10px;
    font-size: 0.8rem;
  }
  .nexus-calendar-grid {
    gap: 4px;
  }
  .nexus-calendar-day-header {
    font-size: 0.68rem;
    padding: 4px 0;
  }
  .nexus-calendar-day {
    font-size: 0.8rem;
    border-radius: 6px;
  }
  .nexus-slots-panel {
    padding: 12px;
    max-height: 300px;
  }
  .nexus-slots-title {
    font-size: 0.8rem;
    margin-bottom: 8px;
    padding-bottom: 6px;
  }
  .nexus-slot-btn {
    padding: 8px;
    font-size: 0.8rem;
  }
  .nexus-booking-summary-banner {
    padding: 8px 12px;
    font-size: 0.8rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .nexus-booking-summary-banner button {
    width: 100%;
    justify-content: center;
  }
  .nexus-form-input {
    padding: 8px 10px;
    font-size: 0.85rem;
  }
}