/**
 * Payment Plan Calculator - Front-end Stylesheet
 * Theme: Luxury Black & #CAA2A3 (Blush Mauve / Rose Gold)
 * Responsive & Mobile-Optimized
 */

:root {
  --ppc-primary: #CAA2A3;
  --ppc-primary-hover: #b88f90;
  --ppc-primary-dark: #a27576;
  --ppc-primary-light: rgba(202, 162, 163, 0.1);
  --ppc-primary-glow: rgba(202, 162, 163, 0.28);
  --ppc-dark: #111111;
  --ppc-dark-hover: #222222;
  --ppc-dark-card: #18181c;
  --ppc-bg: #fbfbfb;
  --ppc-card: #ffffff;
  --ppc-border: #e5e7eb;
  --ppc-text: #111111;
  --ppc-muted: #6b7280;
  --ppc-success: #10b981;
  --ppc-error: #ef4444;
  --ppc-radius: 12px;
  --ppc-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
  --ppc-shadow-card: 0 4px 16px rgba(0, 0, 0, 0.04);
  --ppc-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

.ppc-wrap {
  font-family: var(--ppc-font);
  color: var(--ppc-text);
  max-width: 980px;
  margin: 1.5rem auto;
  padding: 1.5rem 1rem;
  position: relative;
  box-sizing: border-box;
}

.ppc-wrap *,
.ppc-wrap *::before,
.ppc-wrap *::after {
  box-sizing: border-box;
}

/* Header */
.ppc-header {
  margin-bottom: 2rem;
  text-align: center;
}

.ppc-title {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--ppc-dark);
  margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.ppc-subtitle {
  color: var(--ppc-muted);
  margin: 0 auto;
  max-width: 600px;
  font-size: 0.975rem;
  line-height: 1.5;
}

/* Back Button */
.ppc-back {
  background: none;
  border: none;
  color: var(--ppc-dark);
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  margin-bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border-radius: 6px;
  transition: all 0.15s ease;
}

.ppc-back:hover {
  background: var(--ppc-primary-light);
  color: var(--ppc-dark);
}

/* 2-Column Grid */
.ppc-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 1.75rem;
  align-items: start;
}

.ppc-form-panel,
.ppc-summary-card {
  background: var(--ppc-card);
  border: 1px solid var(--ppc-border);
  border-radius: var(--ppc-radius);
  padding: 1.75rem;
  box-shadow: var(--ppc-shadow);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

/* Locked Course Card */
.ppc-locked-course-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.15rem;
  background: var(--ppc-primary-light);
  border: 1px solid var(--ppc-primary);
  border-radius: 10px;
}

.ppc-locked-course-name {
  font-weight: 700;
  color: var(--ppc-dark);
  font-size: 1rem;
}

.ppc-locked-course-price {
  font-weight: 800;
  color: var(--ppc-dark);
  font-size: 1.1rem;
  white-space: nowrap;
}

/* Form Fields */
.ppc-field {
  margin-bottom: 1.4rem;
}

.ppc-field label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-weight: 600;
  font-size: 0.925rem;
  color: var(--ppc-dark);
  margin-bottom: 0.45rem;
}

.ppc-field .req {
  color: var(--ppc-error);
}

.ppc-hint {
  font-weight: 500;
  color: var(--ppc-muted);
  font-size: 0.8rem;
  background: #f3f4f6;
  padding: 2px 8px;
  border-radius: 4px;
}

/* Input Styles */
.ppc-field select,
.ppc-field input[type="text"],
.ppc-field input[type="email"],
.ppc-field input[type="tel"],
.ppc-field input[type="number"],
.ppc-field textarea {
  width: 100%;
  padding: 0.75rem 0.95rem;
  border: 1px solid var(--ppc-border);
  border-radius: 8px;
  font-size: 0.975rem;
  font-family: inherit;
  background: #ffffff;
  color: var(--ppc-dark);
  transition: all 0.2s ease;
}

.ppc-field select:focus,
.ppc-field input:focus,
.ppc-field textarea:focus {
  outline: none;
  border-color: var(--ppc-primary);
  box-shadow: 0 0 0 3px var(--ppc-primary-glow);
}

.ppc-field select:disabled,
.ppc-field input:disabled {
  background: #f9fafb;
  color: #9ca3af;
  cursor: not-allowed;
  border-color: #f3f4f6;
}

/* Input with Currency Prefix */
.ppc-input-group {
  display: flex;
  align-items: stretch;
}

.ppc-prefix {
  display: flex;
  align-items: center;
  padding: 0 0.9rem;
  background: #f9fafb;
  border: 1px solid var(--ppc-border);
  border-right: none;
  border-radius: 8px 0 0 8px;
  font-weight: 700;
  color: var(--ppc-dark);
  font-size: 0.95rem;
}

.ppc-input-group input {
  border-radius: 0 8px 8px 0 !important;
  flex: 1;
}

/* Custom Range Slider */
.ppc-slider {
  width: 100%;
  margin-top: 0.85rem;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 3px;
  background: #e5e7eb;
  outline: none;
  accent-color: var(--ppc-primary);
}

.ppc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--ppc-primary);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  transition: transform 0.15s ease, background 0.15s ease;
}

.ppc-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  background: var(--ppc-primary-hover);
}

.ppc-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--ppc-primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  transition: transform 0.15s ease, background 0.15s ease;
}

.ppc-slider::-moz-range-thumb:hover {
  transform: scale(1.15);
  background: var(--ppc-primary-hover);
}

.ppc-slider:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==========================================================================
   Summary Card
   ========================================================================== */
.ppc-summary-card h3 {
  margin: 0 0 1.25rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ppc-dark);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ppc-summary-card h3::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--ppc-primary);
  border-radius: 2px;
}

.ppc-summary-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.6rem 0;
  font-size: 0.95rem;
  color: var(--ppc-muted);
  border-bottom: 1px solid #f3f4f6;
}

.ppc-summary-row strong {
  color: var(--ppc-dark);
  font-weight: 700;
  font-size: 1rem;
}

/* Highlight Monthly Payment Row */
.ppc-summary-row.highlight {
  background: var(--ppc-dark);
  color: #ffffff;
  margin: 1rem -0.75rem;
  padding: 1rem 1.15rem;
  border-radius: 10px;
  border-bottom: none;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
}

.ppc-summary-row.highlight span {
  font-size: 1rem;
  font-weight: 500;
  color: #e5e7eb;
}

.ppc-summary-row.highlight strong {
  color: var(--ppc-primary);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.ppc-summary-row.subtle {
  font-size: 0.85rem;
  color: var(--ppc-muted);
  border-bottom: none;
  padding-top: 0.35rem;
}

.ppc-note {
  font-size: 0.825rem;
  color: var(--ppc-muted);
  margin: 0.85rem 0 1.35rem;
  line-height: 1.45;
  padding: 0.6rem 0.85rem;
  background: #f9fafb;
  border-radius: 6px;
  border-left: 3px solid var(--ppc-primary);
}

/* Action Buttons */
.ppc-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  font-family: inherit;
  line-height: 1.25;
}

.ppc-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.ppc-btn-primary {
  background: var(--ppc-dark);
  color: #ffffff;
  width: 100%;
  border: 1px solid var(--ppc-dark);
}

.ppc-btn-primary:hover:not(:disabled) {
  background: var(--ppc-primary);
  border-color: var(--ppc-primary);
  color: #ffffff;
  box-shadow: 0 4px 14px var(--ppc-primary-glow);
  transform: translateY(-1px);
}

.ppc-btn-block {
  width: 100%;
  margin-top: 1.25rem;
}

.ppc-secure-note {
  text-align: center;
  font-size: 0.825rem;
  color: var(--ppc-muted);
  margin: 0.95rem 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

/* Agreement & Terms */
.ppc-terms {
  margin-top: 1.25rem;
}

.ppc-checkbox {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ppc-dark);
  cursor: pointer;
}

.ppc-checkbox input {
  margin-top: 0.15rem;
  accent-color: var(--ppc-primary);
  width: 16px;
  height: 16px;
}

.ppc-terms-text {
  margin-top: 0.85rem;
  padding: 0.95rem;
  background: #f9fafb;
  border: 1px solid var(--ppc-border);
  border-radius: 8px;
  font-size: 0.8rem;
  color: var(--ppc-muted);
  max-height: 140px;
  overflow-y: auto;
  line-height: 1.5;
  white-space: pre-wrap;
}

/* Spinner Overlay */
.ppc-overlay {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: var(--ppc-radius);
  z-index: 20;
  backdrop-filter: blur(2px);
}

.ppc-spinner {
  width: 42px;
  height: 42px;
  border: 3px solid #f3f4f6;
  border-top-color: var(--ppc-primary);
  border-radius: 50%;
  animation: ppc-spin 0.7s linear infinite;
  margin-bottom: 1rem;
}

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

/* Alert Notifications */
.ppc-alert {
  margin-top: 1.25rem;
  padding: 0.95rem 1.15rem;
  border-radius: 8px;
  font-size: 0.925rem;
  font-weight: 500;
}

.ppc-alert.is-error {
  background: #fef2f2;
  color: var(--ppc-error);
  border: 1px solid #fecaca;
}

.ppc-alert.is-success {
  background: #ecfdf5;
  color: var(--ppc-success);
  border: 1px solid #a7f3d0;
}

.ppc-step[hidden] {
  display: none !important;
}

.sticky {
  position: sticky;
  top: 1.5rem;
}

hr {
  border: none;
  border-top: 1px solid var(--ppc-border);
  margin: 1.25rem 0;
}

/* ==========================================================================
   Responsive & Mobile Friendly Breakpoints
   ========================================================================== */

/* Tablets / Medium Screens */
@media (max-width: 768px) {
  .ppc-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* Disable sticky position on mobile so summary card doesn't block scroll */
  .sticky {
    position: static;
  }

  .ppc-summary-card {
    margin-top: 0;
  }

  .ppc-title {
    font-size: 1.5rem;
  }
}

/* Small Mobile Screens */
@media (max-width: 480px) {
  .ppc-wrap {
    padding: 1rem 0.5rem;
    margin: 0.75rem auto;
  }

  .ppc-form-panel,
  .ppc-summary-card {
    padding: 1.25rem 1rem;
    border-radius: 10px;
  }

  .ppc-field select,
  .ppc-field input[type="text"],
  .ppc-field input[type="email"],
  .ppc-field input[type="tel"],
  .ppc-field input[type="number"],
  .ppc-field textarea {
    padding: 0.85rem;
    font-size: 1rem;
    min-height: 48px;
  }

  .ppc-prefix {
    padding: 0 0.8rem;
    font-size: 1rem;
  }

  .ppc-slider {
    height: 8px;
  }

  .ppc-slider::-webkit-slider-thumb {
    width: 26px;
    height: 26px;
  }

  .ppc-slider::-moz-range-thumb {
    width: 26px;
    height: 26px;
  }

  .ppc-summary-row.highlight {
    margin: 0.85rem -0.5rem;
    padding: 0.85rem 1rem;
  }

  .ppc-summary-row.highlight strong {
    font-size: 1.35rem;
  }

  .ppc-btn {
    padding: 0.95rem 1.25rem;
    font-size: 1rem;
    min-height: 48px;
  }
}