/* ==========================================================================
   DD Meeting Scheduler — Frontend Calendar Styles
   Theme: Dark navy (#000080) + mint/teal (#00E4C0) + blue (#006ED5)
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  --ddm-navy:        #000080;
  --ddm-navy-dark:   #00005a;
  --ddm-navy-mid:    #0A0E2E;
  --ddm-navy-light:  #1A2050;
  --ddm-teal:        #00E4C0;
  --ddm-teal-dark:   #00B89A;
  --ddm-blue:        #006ED5;
  --ddm-blue-dark:   #0055A8;
  --ddm-white:       #ffffff;
  --ddm-text:        rgba(255, 255, 255, 0.90);
  --ddm-muted:       rgba(255, 255, 255, 0.45);
  --ddm-border:      rgba(255, 255, 255, 0.08);
  --ddm-border-teal: rgba(0, 228, 192, 0.45);
  --ddm-error:       #ff5f5f;
  --ddm-success:     #00E4C0;
  --ddm-radius:      12px;
  --ddm-radius-sm:   8px;
  --ddm-radius-xs:   6px;
  --ddm-shadow:      0 8px 32px rgba(0, 0, 128, 0.35);
  --ddm-transition:  0.2s ease;
}

/* --------------------------------------------------------------------------
   Main Wrapper
   -------------------------------------------------------------------------- */
#ddmeet-wrap {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--ddm-text);
  -webkit-font-smoothing: antialiased;
}

/* --------------------------------------------------------------------------
   Loading Overlay
   -------------------------------------------------------------------------- */
.ddmeet-loading {
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 46, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  border-radius: var(--ddm-radius);
  backdrop-filter: blur(4px);
}

.ddmeet-loading[hidden] {
  display: none;
}

.ddmeet-spinner {
  width: 44px;
  height: 44px;
  border: 3px solid var(--ddm-border);
  border-top-color: var(--ddm-teal);
  border-radius: 50%;
  animation: ddm-spin 0.8s linear infinite;
}

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

/* --------------------------------------------------------------------------
   Calendar Section
   -------------------------------------------------------------------------- */
.ddmeet-calendar-section {
  background: var(--ddm-navy-mid);
  border: 1px solid var(--ddm-border);
  border-radius: var(--ddm-radius);
  padding: 24px;
  box-shadow: var(--ddm-shadow);
}

/* --------------------------------------------------------------------------
   Calendar Header (month navigation)
   -------------------------------------------------------------------------- */
.ddmeet-cal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}

.ddmeet-nav-btn {
  background: var(--ddm-navy-light);
  border: 1px solid var(--ddm-border);
  color: var(--ddm-teal);
  width: 40px;
  height: 40px;
  border-radius: var(--ddm-radius-sm);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--ddm-transition), border-color var(--ddm-transition), transform var(--ddm-transition);
  flex-shrink: 0;
}

.ddmeet-nav-btn:hover,
.ddmeet-nav-btn:focus-visible {
  background: var(--ddm-teal);
  color: var(--ddm-navy);
  border-color: var(--ddm-teal);
  transform: scale(1.08);
  outline: none;
}

.ddmeet-nav-btn:focus-visible {
  outline: 2px solid var(--ddm-teal);
  outline-offset: 2px;
}

.ddmeet-month-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--ddm-white);
  letter-spacing: 0.02em;
  text-align: center;
  flex: 1;
}

/* --------------------------------------------------------------------------
   Calendar Grid
   -------------------------------------------------------------------------- */
.ddmeet-cal-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

/* Weekday header labels */
.ddmeet-cal-weekday {
  text-align: center;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ddm-muted);
  padding: 6px 0;
}

/* Individual day cells */
.ddmeet-cal-day {
  position: relative;
  aspect-ratio: 1 / 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--ddm-navy-light);
  border: 1px solid var(--ddm-border);
  border-radius: var(--ddm-radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--ddm-text);
  cursor: default;
  user-select: none;
  transition: background var(--ddm-transition), border-color var(--ddm-transition), transform var(--ddm-transition), color var(--ddm-transition);
  min-height: 48px;
}

/* Empty padding cells */
.ddmeet-cal-day.empty {
  background: transparent;
  border-color: transparent;
  pointer-events: none;
}

/* Past dates */
.ddmeet-cal-day.past {
  opacity: 0.32;
  cursor: not-allowed;
  pointer-events: none;
}

/* Today highlight */
.ddmeet-cal-day.today {
  border-color: var(--ddm-blue);
  color: var(--ddm-white);
  font-weight: 700;
}

.ddmeet-cal-day.today::before {
  content: '';
  position: absolute;
  top: 4px;
  right: 4px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ddm-blue);
}

/* Days with available slots */
.ddmeet-cal-day.available {
  border-color: var(--ddm-border-teal);
  cursor: pointer;
}

.ddmeet-cal-day.available:hover {
  background: rgba(0, 228, 192, 0.12);
  border-color: var(--ddm-teal);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 228, 192, 0.15);
}

.ddmeet-cal-day.available:focus-visible {
  outline: 2px solid var(--ddm-teal);
  outline-offset: 2px;
  background: rgba(0, 228, 192, 0.12);
  border-color: var(--ddm-teal);
}

/* Teal availability dot */
.ddmeet-cal-day.available::after {
  content: '';
  position: absolute;
  bottom: 5px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--ddm-teal);
}

/* Selected day */
.ddmeet-cal-day.selected {
  background: var(--ddm-teal) !important;
  border-color: var(--ddm-teal) !important;
  color: var(--ddm-navy) !important;
  font-weight: 700;
  transform: translateY(-2px);
  box-shadow: 0 4px 18px rgba(0, 228, 192, 0.35);
}

.ddmeet-cal-day.selected::after {
  background: var(--ddm-navy);
}

/* Slot count badge */
.ddmeet-cal-day .ddm-slot-count {
  font-size: 10px;
  color: var(--ddm-teal);
  font-weight: 600;
  line-height: 1;
  margin-top: 2px;
}

.ddmeet-cal-day.selected .ddm-slot-count {
  color: var(--ddm-navy);
}

/* --------------------------------------------------------------------------
   Slots Panel
   -------------------------------------------------------------------------- */
.ddmeet-slots-panel {
  background: var(--ddm-navy-mid);
  border: 1px solid var(--ddm-border-teal);
  border-radius: var(--ddm-radius);
  padding: 24px;
  margin-top: 16px;
  box-shadow: var(--ddm-shadow);
  animation: ddm-slide-down 0.25s ease;
}

.ddmeet-slots-panel[hidden] {
  display: none;
}

@keyframes ddm-slide-down {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ddmeet-slots-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ddm-teal);
  margin: 0 0 16px;
}

.ddmeet-slots-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* Time slot buttons */
.ddmeet-slot-btn {
  background: transparent;
  border: 1.5px solid var(--ddm-teal);
  color: var(--ddm-white);
  padding: 10px 18px;
  border-radius: var(--ddm-radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--ddm-transition), color var(--ddm-transition), transform var(--ddm-transition), box-shadow var(--ddm-transition);
  min-width: 110px;
  text-align: center;
  line-height: 1.3;
}

.ddmeet-slot-btn:hover,
.ddmeet-slot-btn:focus-visible {
  background: rgba(0, 228, 192, 0.15);
  border-color: var(--ddm-teal);
  transform: translateY(-1px);
  outline: none;
}

.ddmeet-slot-btn:focus-visible {
  outline: 2px solid var(--ddm-teal);
  outline-offset: 2px;
}

.ddmeet-slot-btn.selected {
  background: var(--ddm-teal);
  color: var(--ddm-navy);
  box-shadow: 0 4px 14px rgba(0, 228, 192, 0.3);
  transform: translateY(-1px);
}

.ddmeet-no-slots {
  color: var(--ddm-muted);
  font-size: 14px;
  font-style: italic;
  padding: 8px 0;
}

/* --------------------------------------------------------------------------
   Form Wrapper
   -------------------------------------------------------------------------- */
.ddmeet-form-wrap {
  background: var(--ddm-navy-mid);
  border: 1px solid var(--ddm-border);
  border-radius: var(--ddm-radius);
  padding: 28px;
  margin-top: 16px;
  box-shadow: var(--ddm-shadow);
  animation: ddm-slide-down 0.25s ease;
}

.ddmeet-form-wrap[hidden] {
  display: none;
}

.ddmeet-form-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--ddm-white);
  margin: 0 0 8px;
}

.ddmeet-selected-info {
  font-size: 14px;
  color: var(--ddm-teal);
  margin: 0 0 24px;
  padding: 10px 14px;
  background: rgba(0, 228, 192, 0.07);
  border-left: 3px solid var(--ddm-teal);
  border-radius: var(--ddm-radius-xs);
}

/* --------------------------------------------------------------------------
   Form Fields
   -------------------------------------------------------------------------- */
.ddmeet-field {
  display: flex;
  flex-direction: column;
  margin-bottom: 20px;
}

.ddmeet-field label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ddm-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.ddmeet-field label span[aria-hidden] {
  color: var(--ddm-teal);
  margin-left: 2px;
}

.ddmeet-field input,
.ddmeet-field select,
.ddmeet-field textarea {
  background: var(--ddm-navy-light);
  border: 1.5px solid var(--ddm-border);
  border-radius: var(--ddm-radius-sm);
  color: var(--ddm-white);
  font-size: 15px;
  padding: 12px 14px;
  transition: border-color var(--ddm-transition), box-shadow var(--ddm-transition), background var(--ddm-transition);
  width: 100%;
  box-sizing: border-box;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

.ddmeet-field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2300E4C0' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  color-scheme: dark;
}

/* Dark background for native dropdown options */
.ddmeet-field select option {
  background-color: var(--ddm-navy-light);
  color: var(--ddm-white);
}

.ddmeet-field select option:checked,
.ddmeet-field select option:hover {
  background-color: var(--ddm-navy-mid);
  color: var(--ddm-teal);
}

.ddmeet-field textarea {
  resize: vertical;
  min-height: 100px;
}

.ddmeet-field input::placeholder,
.ddmeet-field textarea::placeholder {
  color: rgba(255, 255, 255, 0.30);
}

.ddmeet-field input:focus,
.ddmeet-field select:focus,
.ddmeet-field textarea:focus {
  border-color: var(--ddm-teal);
  box-shadow: 0 0 0 3px rgba(0, 228, 192, 0.12);
  background: rgba(0, 110, 213, 0.08);
}

.ddmeet-field input.invalid,
.ddmeet-field select.invalid,
.ddmeet-field textarea.invalid {
  border-color: var(--ddm-error);
  box-shadow: 0 0 0 3px rgba(255, 95, 95, 0.10);
}

/* Field hints */
.ddmeet-field-hint {
  font-size: 11px;
  color: var(--ddm-muted);
  margin-top: 4px;
}

/* Field errors */
.ddmeet-field-error {
  font-size: 12px;
  color: var(--ddm-error);
  margin-top: 5px;
  font-weight: 500;
}

.ddmeet-field-error[hidden] {
  display: none;
}

.ddmeet-optional {
  font-weight: 400;
  font-size: 11px;
  color: var(--ddm-muted);
  text-transform: none;
  letter-spacing: 0;
  margin-left: 4px;
}

/* --------------------------------------------------------------------------
   Form-level error
   -------------------------------------------------------------------------- */
.ddmeet-form-error {
  background: rgba(255, 95, 95, 0.12);
  border: 1px solid rgba(255, 95, 95, 0.35);
  color: var(--ddm-error);
  border-radius: var(--ddm-radius-sm);
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 16px;
  animation: ddm-shake 0.35s ease;
}

.ddmeet-form-error[hidden] {
  display: none;
}

@keyframes ddm-shake {
  0%, 100% { transform: translateX(0); }
  25%       { transform: translateX(-6px); }
  75%       { transform: translateX(6px); }
}

/* --------------------------------------------------------------------------
   Submit Button
   -------------------------------------------------------------------------- */
.ddmeet-submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--ddm-teal) 0%, var(--ddm-blue) 100%);
  color: var(--ddm-navy);
  border: none;
  border-radius: var(--ddm-radius-sm);
  padding: 14px 36px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: opacity var(--ddm-transition), transform var(--ddm-transition), box-shadow var(--ddm-transition);
  width: 100%;
  margin-top: 8px;
  position: relative;
  overflow: hidden;
}

.ddmeet-submit-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--ddm-transition);
}

.ddmeet-submit-btn:hover:not(:disabled)::before {
  background: rgba(255,255,255,0.10);
}

.ddmeet-submit-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 228, 192, 0.35);
}

.ddmeet-submit-btn:focus-visible {
  outline: 2px solid var(--ddm-teal);
  outline-offset: 3px;
}

.ddmeet-submit-btn:disabled,
.ddmeet-submit-btn[aria-disabled="true"] {
  opacity: 0.40;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.ddmeet-submit-btn.loading::after {
  content: '';
  width: 18px;
  height: 18px;
  border: 2px solid rgba(0, 0, 128, 0.30);
  border-top-color: var(--ddm-navy);
  border-radius: 50%;
  animation: ddm-spin 0.7s linear infinite;
  margin-left: 8px;
  display: inline-block;
}

/* --------------------------------------------------------------------------
   Success State
   -------------------------------------------------------------------------- */
.ddmeet-success {
  background: var(--ddm-navy-mid);
  border: 1px solid var(--ddm-border-teal);
  border-radius: var(--ddm-radius);
  padding: 48px 32px;
  text-align: center;
  margin-top: 16px;
  box-shadow: var(--ddm-shadow);
  animation: ddm-slide-down 0.3s ease;
}

.ddmeet-success[hidden] {
  display: none;
}

.ddmeet-success-icon {
  width: 64px;
  height: 64px;
  background: rgba(0, 228, 192, 0.12);
  border: 2px solid var(--ddm-teal);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--ddm-teal);
  margin: 0 auto 20px;
  animation: ddm-pop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes ddm-pop {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.ddmeet-success h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--ddm-white);
  margin: 0 0 12px;
}

.ddmeet-success p {
  color: var(--ddm-muted);
  font-size: 15px;
  margin: 0 0 16px;
  line-height: 1.6;
}

.ddmeet-tracking-number {
  font-size: 32px;
  font-weight: 800;
  color: var(--ddm-teal);
  letter-spacing: 3px;
  background: rgba(0, 228, 192, 0.08);
  border: 1.5px solid var(--ddm-border-teal);
  border-radius: var(--ddm-radius-sm);
  display: inline-block;
  padding: 14px 32px;
  margin: 4px 0 20px;
  font-family: "Courier New", Courier, monospace;
}

.ddmeet-success-note {
  font-size: 13px !important;
  max-width: 420px;
  margin: 0 auto 28px !important;
}

.ddmeet-new-btn {
  background: transparent;
  border: 1.5px solid var(--ddm-teal);
  color: var(--ddm-teal);
  padding: 12px 28px;
  border-radius: var(--ddm-radius-sm);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--ddm-transition), color var(--ddm-transition);
}

.ddmeet-new-btn:hover,
.ddmeet-new-btn:focus-visible {
  background: var(--ddm-teal);
  color: var(--ddm-navy);
  outline: none;
}

.ddmeet-new-btn:focus-visible {
  outline: 2px solid var(--ddm-teal);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Error Banner (standalone)
   -------------------------------------------------------------------------- */
.ddmeet-error {
  background: rgba(255, 95, 95, 0.10);
  border: 1px solid rgba(255, 95, 95, 0.30);
  color: var(--ddm-error);
  border-radius: var(--ddm-radius-sm);
  padding: 14px 18px;
  font-size: 14px;
  font-weight: 500;
  margin: 12px 0;
}

.ddmeet-error[hidden] {
  display: none;
}

/* --------------------------------------------------------------------------
   Screen-reader utilities
   -------------------------------------------------------------------------- */
.screen-reader-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 600px) {
  #ddmeet-wrap {
    padding: 16px 12px;
  }

  .ddmeet-calendar-section,
  .ddmeet-slots-panel,
  .ddmeet-form-wrap,
  .ddmeet-success {
    padding: 16px;
  }

  .ddmeet-cal-grid {
    gap: 4px;
  }

  .ddmeet-cal-day {
    font-size: 12px;
    min-height: 40px;
    border-radius: 6px;
  }

  .ddmeet-month-title {
    font-size: 16px;
  }

  .ddmeet-tracking-number {
    font-size: 22px;
    padding: 10px 18px;
    letter-spacing: 2px;
  }

  .ddmeet-slot-btn {
    min-width: 90px;
    padding: 9px 12px;
    font-size: 13px;
  }

  .ddmeet-submit-btn {
    padding: 13px 24px;
    font-size: 15px;
  }
}

@media (max-width: 380px) {
  .ddmeet-cal-day {
    font-size: 11px;
    min-height: 34px;
  }

  .ddmeet-cal-day .ddm-slot-count {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   Reduced motion support
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}