/* ============================================================
   KB Booking Calendar – Frontend CSS
   ============================================================ */

:root {
  --kb-accent:       #2563eb;
  --kb-accent-light: #eff6ff;
  --kb-accent-dark:  #1d4ed8;
  --kb-success:      #16a34a;
  --kb-error:        #dc2626;
  --kb-warning:      #d97706;
  --kb-border:       #e5e7eb;
  --kb-text:         #1f2937;
  --kb-muted:        #6b7280;
  --kb-bg:           #f9fafb;
  --kb-radius:       10px;
  --kb-shadow:       0 1px 4px rgba(0,0,0,.08);
}

/* Container */
#kb-booking-wrapper {
  max-width: 820px;
  margin: 0 auto;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--kb-text);
}

/* Section Labels */
.kb-section {
  margin-bottom: 36px;
}
.kb-section-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.kb-section-title .kb-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: var(--kb-accent);
  color: #fff;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

/* ---- Services ---- */
#kb-service-select {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.kb-service-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 16px 20px;
  border: 2px solid var(--kb-border);
  border-radius: var(--kb-radius);
  background: #fff;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  text-align: left;
  min-width: 180px;
}
.kb-service-btn:hover {
  border-color: var(--kb-accent);
  background: var(--kb-accent-light);
}
.kb-service-btn.kb-active {
  border-color: var(--kb-accent);
  background: var(--kb-accent-light);
}
.kb-service-name {
  font-weight: 600;
  font-size: 15px;
  color: var(--kb-text);
}
.kb-service-duration {
  font-size: 13px;
  color: var(--kb-muted);
  margin-top: 4px;
}

/* ---- Kalender ---- */
#kb-calendar {
  background: #fff;
  border: 1px solid var(--kb-border);
  border-radius: var(--kb-radius);
  overflow: hidden;
  box-shadow: var(--kb-shadow);
}
.kb-cal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--kb-accent);
  color: #fff;
}
.kb-cal-title {
  font-weight: 700;
  font-size: 16px;
}
.kb-cal-nav {
  background: rgba(255,255,255,.2);
  border: none;
  color: #fff;
  border-radius: 6px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s;
}
.kb-cal-nav:hover {
  background: rgba(255,255,255,.35);
}
.kb-cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
}
.kb-cal-days {
  background: var(--kb-bg);
  border-bottom: 1px solid var(--kb-border);
}
.kb-cal-day-name {
  text-align: center;
  padding: 10px 4px;
  font-size: 12px;
  font-weight: 600;
  color: var(--kb-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
}
.kb-cal-cells {
  padding: 8px;
  gap: 4px;
}
.kb-cal-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: default;
  transition: background .15s, color .15s;
}
.kb-day.kb-available {
  cursor: pointer;
}
.kb-day.kb-available:hover {
  background: var(--kb-accent-light);
  color: var(--kb-accent);
}
.kb-day.kb-today {
  font-weight: 700;
  border: 2px solid var(--kb-accent);
  color: var(--kb-accent);
}
.kb-day.kb-selected {
  background: var(--kb-accent) !important;
  color: #fff !important;
  font-weight: 700;
}
.kb-day.kb-past,
.kb-day.kb-weekend {
  color: var(--kb-border);
}

/* ---- Slots ---- */
#kb-slots {
  min-height: 60px;
}
.kb-slots-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.kb-slot-btn {
  padding: 10px 18px;
  border: 2px solid var(--kb-border);
  border-radius: 8px;
  background: #fff;
  font-size: 15px;
  font-weight: 600;
  color: var(--kb-text);
  cursor: pointer;
  transition: all .15s;
}
.kb-slot-btn:hover {
  border-color: var(--kb-accent);
  color: var(--kb-accent);
  background: var(--kb-accent-light);
}
.kb-slot-btn.kb-active {
  background: var(--kb-accent);
  border-color: var(--kb-accent);
  color: #fff;
}

/* ---- Formular ---- */
#kb-booking-form {
  background: #fff;
  border: 1px solid var(--kb-border);
  border-radius: var(--kb-radius);
  padding: 28px;
  box-shadow: var(--kb-shadow);
}
.kb-form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.kb-form-row.kb-full {
  grid-template-columns: 1fr;
}
.kb-field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--kb-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.kb-field input,
.kb-field textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--kb-border);
  border-radius: 8px;
  font-size: 15px;
  color: var(--kb-text);
  background: #fff;
  transition: border-color .15s;
  box-sizing: border-box;
  font-family: inherit;
}
.kb-field input:focus,
.kb-field textarea:focus {
  outline: none;
  border-color: var(--kb-accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.kb-field textarea {
  resize: vertical;
  min-height: 90px;
}

/* Booking summary */
#kb-booking-summary {
  display: none;
  background: var(--kb-accent-light);
  border: 1px solid var(--kb-accent);
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 600;
  color: var(--kb-accent);
  margin-bottom: 20px;
  font-size: 15px;
}

/* Submit */
#kb-submit-btn {
  width: 100%;
  padding: 14px;
  background: var(--kb-accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: background .15s;
  margin-top: 8px;
}
#kb-submit-btn:hover:not(:disabled) {
  background: var(--kb-accent-dark);
}
#kb-submit-btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}

/* Flash Messages */
#kb-flash {
  display: none;
  padding: 12px 18px;
  border-radius: 8px;
  font-weight: 600;
  margin-bottom: 16px;
  font-size: 14px;
}
.kb-flash-error   { background: #fef2f2; color: var(--kb-error); border: 1px solid #fecaca; }
.kb-flash-success { background: #f0fdf4; color: var(--kb-success); border: 1px solid #bbf7d0; }
.kb-flash-warning { background: #fffbeb; color: var(--kb-warning); border: 1px solid #fde68a; }

/* Loading */
.kb-loading {
  color: var(--kb-muted);
  font-style: italic;
  padding: 16px 0;
}
.kb-no-slots { color: var(--kb-muted); }

/* Success State */
.kb-success {
  text-align: center;
  padding: 60px 20px;
}
.kb-success-icon {
  width: 72px;
  height: 72px;
  background: var(--kb-success);
  color: #fff;
  border-radius: 50%;
  font-size: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
}
.kb-success h3 {
  font-size: 24px;
  margin: 0 0 12px;
}
.kb-btn-secondary {
  margin-top: 20px;
  padding: 10px 24px;
  border: 2px solid var(--kb-accent);
  background: transparent;
  color: var(--kb-accent);
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}
.kb-btn-secondary:hover {
  background: var(--kb-accent);
  color: #fff;
}

/* Responsive */
@media (max-width: 600px) {
  .kb-form-row { grid-template-columns: 1fr; }
  .kb-service-btn { min-width: auto; width: 100%; }
  #kb-booking-form { padding: 20px 16px; }
  .kb-cal-day-name, .kb-cal-cell { font-size: 12px; }
}