/* Modern Registration Form Styles */
:root {
  --primary-color: #007bff;
  --primary-dark: #0056b3;
  --success-color: #28a745;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #17a2b8;
  --light-color: #f8f9fa;
  --dark-color: #343a40;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;
  --white: #ffffff;
  --border-radius: 12px;
  --border-radius-sm: 8px;
  --border-radius-lg: 16px;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 25px rgba(0,0,0,0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-primary: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
  --gradient-success: linear-gradient(135deg, #28a745 0%, #20c997 100%);
  --gradient-bg: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

/* Modern Form Container */
.modern-form-container {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin: 2rem 0;
  position: relative;
}

.modern-form-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  z-index: 1;
}

/* Form Header */
.form-header {
  background: var(--gradient-bg);
  padding: 2rem;
  text-align: center;
  border-bottom: 1px solid var(--gray-200);
}

.form-main-title {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 0.5rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-subtitle {
  font-size: 1rem;
  color: var(--gray-600);
  margin-bottom: 2rem;
  line-height: 1.6;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Progress Indicator */
.progress-container {
  margin-top: 1.5rem;
}

.progress-steps {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  position: relative;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
  transition: var(--transition);
}

.step-icon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gray-300);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  transition: var(--transition);
  border: 3px solid var(--white);
  box-shadow: var(--shadow-sm);
}

.step-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-600);
  text-align: center;
  transition: var(--transition);
  white-space: nowrap;
}

.step.active .step-icon {
  background: var(--gradient-primary);
  color: var(--white);
  transform: scale(1.1);
  box-shadow: var(--shadow);
}

.step.active .step-label {
  color: var(--primary-color);
}

.step.completed .step-icon {
  background: var(--gradient-success);
  color: var(--white);
}

.step.completed .step-label {
  color: var(--success-color);
}

.progress-bar {
  height: 4px;
  background: var(--gray-300);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: width 0.5s ease;
  position: relative;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Form Steps */
.form-step {
  display: none;
  padding: 2rem;
  animation: fadeIn 0.5s ease;
}

.form-step.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.step-header {
  text-align: center;
  margin-bottom: 2rem;
}

.step-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 0.5rem;
}

.step-description {
  font-size: 1rem;
  color: var(--gray-600);
  margin-bottom: 0;
  line-height: 1.6;
}

/* Form Grid */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

/* Form Labels */
.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--dark-color);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
}

.form-label.required::after {
  content: " *";
  color: var(--danger-color);
  margin-left: 4px;
}

/* Input Wrapper */
.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.form-input {
  width: 100%;
  padding: 0.875rem 1rem;
  padding-right: 3rem;
  border: 2px solid var(--gray-300);
  border-radius: var(--border-radius-sm);
  font-size: 1rem;
  transition: var(--transition);
  background: var(--white);
  color: var(--dark-color);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
  transform: translateY(-1px);
}

.form-input:valid:not(:placeholder-shown) {
  border-color: var(--success-color);
}

.form-input.error {
  border-color: var(--danger-color);
  animation: shake 0.5s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.input-icon {
  position: absolute;
  right: 1rem;
  font-size: 1.2rem;
  color: var(--gray-500);
  pointer-events: none;
  transition: var(--transition);
}

.form-input:focus + .input-icon {
  color: var(--primary-color);
  transform: scale(1.1);
}

/* Textarea */
textarea.form-input {
  resize: vertical;
  min-height: 100px;
}

/* Select */
select.form-input {
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
}

/* Form Feedback */
.form-feedback {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  min-height: 1.25rem;
  transition: var(--transition);
}

.form-feedback.error {
  color: var(--danger-color);
}

.form-feedback.success {
  color: var(--success-color);
}

.form-hint {
  margin-top: 0.25rem;
  font-size: 0.8rem;
  color: var(--gray-500);
  font-style: italic;
}

/* File Upload */
.file-upload-modern {
  position: relative;
}

.file-upload-modern input[type="file"] {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 2;
}

.file-upload-area {
  border: 2px dashed var(--gray-300);
  border-radius: var(--border-radius);
  padding: 2rem;
  text-align: center;
  transition: var(--transition);
  background: var(--gray-100);
  cursor: pointer;
}

.file-upload-area:hover,
.file-upload-area.dragover {
  border-color: var(--primary-color);
  background: rgba(0, 123, 255, 0.05);
  transform: translateY(-2px);
}

.file-upload-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--gray-500);
}

.file-upload-text {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.file-upload-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--dark-color);
}

.file-upload-subtitle {
  font-size: 0.9rem;
  color: var(--gray-600);
}

.file-preview {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--gray-100);
  border-radius: var(--border-radius-sm);
  display: none;
}

.file-preview.show {
  display: block;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from { opacity: 0; max-height: 0; }
  to { opacity: 1; max-height: 200px; }
}

.file-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.file-icon {
  font-size: 2rem;
}

.file-details {
  flex: 1;
}

.file-name {
  font-weight: 600;
  color: var(--dark-color);
  margin-bottom: 0.25rem;
}

.file-size {
  font-size: 0.85rem;
  color: var(--gray-600);
}

.file-remove {
  background: var(--danger-color);
  color: var(--white);
  border: none;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.file-remove:hover {
  background: #c82333;
  transform: scale(1.1);
}

/* Confirmation Summary */
.confirmation-summary {
  max-width: 600px;
  margin: 0 auto 2rem;
}

.summary-section {
  background: var(--gray-100);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  border-left: 4px solid var(--primary-color);
}

.summary-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 1rem;
}

.summary-content {
  display: grid;
  gap: 0.5rem;
}

.summary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--gray-300);
}

.summary-item:last-child {
  border-bottom: none;
}

.summary-label {
  font-weight: 600;
  color: var(--gray-700);
}

.summary-value {
  color: var(--dark-color);
  text-align: right;
  max-width: 60%;
  word-break: break-word;
}

/* Agreement Checkbox */
.form-agreement {
  max-width: 600px;
  margin: 2rem auto 0;
}

.checkbox-wrapper {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  cursor: pointer;
  padding: 1rem;
  background: var(--gray-100);
  border-radius: var(--border-radius);
  border: 2px solid transparent;
  transition: var(--transition);
}

.checkbox-wrapper:hover {
  background: rgba(0, 123, 255, 0.05);
  border-color: var(--primary-color);
}

.checkbox-wrapper input[type="checkbox"] {
  display: none;
}

.checkmark {
  width: 24px;
  height: 24px;
  border: 2px solid var(--gray-400);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
  margin-top: 2px;
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkmark {
  background: var(--gradient-primary);
  border-color: var(--primary-color);
}

.checkbox-wrapper input[type="checkbox"]:checked + .checkmark::after {
  content: "✓";
  color: var(--white);
  font-weight: bold;
  font-size: 14px;
}

.checkbox-text {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--gray-700);
}

/* Form Navigation */
.form-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem;
  background: var(--gray-100);
  border-top: 1px solid var(--gray-200);
  gap: 1rem;
}

.nav-spacer {
  flex: 1;
}

/* Buttons */
.btn {
  padding: 0.875rem 2rem;
  border: none;
  border-radius: var(--border-radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.6s ease;
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn:disabled:hover {
  transform: none;
  box-shadow: none;
}

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

.btn-primary:hover {
  box-shadow: 0 8px 25px rgba(0, 123, 255, 0.3);
}

.btn-secondary {
  background: var(--gray-600);
  color: var(--white);
}

.btn-secondary:hover {
  background: var(--gray-700);
  box-shadow: 0 8px 25px rgba(108, 117, 125, 0.3);
}

.btn-success {
  background: var(--gradient-success);
  color: var(--white);
}

.btn-success:hover {
  box-shadow: 0 8px 25px rgba(40, 167, 69, 0.3);
}

/* Alert Messages */
.alert-modern {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  margin-bottom: 1.5rem;
  border: none;
  box-shadow: var(--shadow-sm);
}

.alert-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.alert-content {
  flex: 1;
}

.alert-content strong {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.alert-content p {
  margin: 0;
  line-height: 1.5;
}

.alert-success {
  background: linear-gradient(135deg, rgba(40, 167, 69, 0.1), rgba(32, 201, 151, 0.1));
  color: var(--success-color);
  border-left: 4px solid var(--success-color);
}

.alert-danger {
  background: linear-gradient(135deg, rgba(220, 53, 69, 0.1), rgba(220, 53, 69, 0.05));
  color: var(--danger-color);
  border-left: 4px solid var(--danger-color);
}

/* Loading States */
.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid transparent;
  border-top: 2px solid var(--white);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .form-header {
    padding: 1.5rem 1rem;
  }
  
  .form-main-title {
    font-size: 1.5rem;
  }
  
  .form-subtitle {
    font-size: 0.9rem;
  }
  
  .progress-steps {
    flex-wrap: wrap;
    gap: 1rem;
  }
  
  .step {
    flex: 1;
    min-width: calc(20% - 0.8rem);
  }
  
  .step-icon {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .step-label {
    font-size: 0.75rem;
  }
  
  .form-step {
    padding: 1.5rem 1rem;
  }
  
  .form-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .form-navigation {
    padding: 1.5rem 1rem;
    flex-wrap: wrap;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
  }
  
  .file-upload-area {
    padding: 1.5rem 1rem;
  }
  
  .file-upload-icon {
    font-size: 2rem;
  }
  
  .checkbox-wrapper {
    gap: 0.75rem;
    padding: 0.75rem;
  }
  
  .checkmark {
    width: 20px;
    height: 20px;
  }
  
  .checkbox-text {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .modern-form-container {
    margin: 1rem 0;
    border-radius: var(--border-radius);
  }
  
  .form-header {
    padding: 1rem;
  }
  
  .progress-steps {
    justify-content: center;
  }
  
  .step {
    min-width: auto;
  }
  
  .step-label {
    display: none;
  }
  
  .form-step {
    padding: 1rem;
  }
  
  .step-title {
    font-size: 1.25rem;
  }
  
  .form-navigation {
    padding: 1rem;
  }
  
  .btn {
    flex: 1;
    justify-content: center;
  }
  
  .nav-spacer {
    display: none;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus Styles */
.form-input:focus,
.btn:focus,
.checkbox-wrapper:focus-within {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .form-input {
    border-width: 3px;
  }
  
  .btn {
    border: 2px solid currentColor;
  }
  
  .step-icon {
    border-width: 4px;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --white: #1a1a1a;
    --dark-color: #ffffff;
    --gray-100: #2d2d2d;
    --gray-200: #3d3d3d;
    --gray-300: #4d4d4d;
    --gray-400: #6d6d6d;
    --gray-500: #8d8d8d;
    --gray-600: #aaaaaa;
    --gray-700: #cccccc;
    --light-color: #2d2d2d;
  }
  
  .modern-form-container {
    background: var(--white);
    color: var(--dark-color);
  }
  
  .form-input {
    background: var(--gray-100);
    color: var(--dark-color);
  }
}