* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Enterprise Neutral Palette */
  --bg-primary: #0b1220;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --surface: #1e293b;
  --surface-hover: #223047;
  --border: rgba(148, 163, 184, 0.2);
  --divider: rgba(148, 163, 184, 0.15);
  --text-primary: #e5e7eb;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --accent-primary: #6366f1; /* indigo */
  --accent-secondary: #3b82f6; /* blue */
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.4);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 10% 0%, rgba(99, 102, 241, 0.12), transparent),
              radial-gradient(800px 400px at 90% 10%, rgba(59, 130, 246, 0.10), transparent),
              var(--bg-primary);
  min-height: 100vh;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent 30%);
  pointer-events: none;
  z-index: -1;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}

.survey-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

.survey-header {
  background: rgba(17, 24, 39, 0.8);
  backdrop-filter: blur(10px);
  border-radius: 16px 16px 0 0;
  padding: 2rem 2.5rem;
  border-bottom: 1px solid var(--divider);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--divider);
}

.header-content {
  display: grid;
  grid-template-columns: 1fr;
  justify-items: center;
  align-items: center;
  gap: 1rem;
}

.logo-section {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.logo-icon {
  width: 60px;
  height: 60px;
  background: var(--accent-gradient);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.6rem;
  box-shadow: var(--shadow-md);
}

@keyframes iconPulse {
  0%, 100% { transform: scale(1); box-shadow: var(--shadow-lg), var(--glow-pink); }
  50% { transform: scale(1.05); box-shadow: var(--shadow-xl), var(--glow-cyan); }
}

.header-text h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  font-weight: 400;
}

.progress-indicator {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.5rem;
  width: 100%;
  margin-top: 0.75rem;
}

.progress-bar {
  width: 100%;
  height: 12px;
  background: var(--bg-tertiary);
  border-radius: 9999px;
  overflow: hidden;
  border: 1px solid var(--divider);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.25);
}

.progress-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 120px;
  align-self: flex-end;
}

.form-container {
  background: rgba(17, 24, 39, 0.75);
  backdrop-filter: blur(8px);
  padding: 3rem;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--divider);
  border-radius: 0 0 16px 16px;
}

.form-intro {
  text-align: center;
  margin-bottom: 3.5rem;
}

.form-intro h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.form-intro h2 i {
  color: var(--accent-secondary);
  text-shadow: var(--glow-cyan);
}

.form-intro p {
  color: var(--text-secondary);
  font-size: 1.2rem;
  max-width: 600px;
  margin: 0 auto;
}

.form-section {
  background: rgba(30, 41, 59, 0.6);
  border-radius: 14px;
  padding: 2rem;
  margin-bottom: 2rem;
  border: 1px solid var(--divider);
  box-shadow: var(--shadow-md);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--border);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent-gradient);
  box-shadow: var(--glow-pink);
}

.section-title i {
  color: var(--accent-primary);
}

.input-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.input-group {
  margin-bottom: 2rem;
}

.input-group label,
.section-label {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.input-group label i {
  color: var(--accent-secondary);
  font-size: 1.1rem;
}

.required {
  color: var(--error);
  font-weight: 700;
  text-shadow: var(--glow-pink);
}

input[type="text"],
input[type="email"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--divider);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid transparent;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
  background: var(--surface-hover);
}

input:hover,
select:hover,
textarea:hover {
  border-color: var(--accent-secondary);
  background: var(--surface-hover);
}

select {
  cursor: pointer;
  background-image: url('data:image/svg+xml;charset=US-ASCII,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 4 5"><path fill="%23ff0080" d="M2 0L0 2h4zm0 5L0 3h4z"/></svg>');
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 14px;
  appearance: none;
}

textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
}

.char-counter {
  text-align: right;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.7rem;
  font-weight: 500;
}

.radio-group {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 1.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--divider);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.radio-option:hover {
  border-color: var(--accent-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: var(--surface);
}

.radio-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.radio-custom {
  width: 22px;
  height: 22px;
  border: 2px solid var(--divider);
  border-radius: 50%;
  position: relative;
  transition: all 0.3s ease;
  flex-shrink: 0;
  background: var(--bg-secondary);
}

.radio-option input[type="radio"]:checked + .radio-custom {
  border-color: var(--accent-primary);
  background: var(--accent-primary);
}

.radio-option input[type="radio"]:checked + .radio-custom::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 10px;
  height: 10px;
  background: white;
  border-radius: 50%;
}

.radio-option input[type="radio"]:checked ~ .radio-content {
  color: var(--text-primary);
}

.radio-option input[type="radio"]:checked ~ .radio-content i {
  color: var(--accent-primary);
  text-shadow: var(--glow-pink);
}

.radio-content {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.radio-content i {
  font-size: 1.3rem;
  color: var(--accent-secondary);
  margin-bottom: 0.3rem;
}

.radio-content span {
  font-weight: 600;
  color: var(--text-primary);
}

.radio-content small {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.checkbox-option {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--divider);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.checkbox-option:hover {
  border-color: var(--accent-secondary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: var(--surface);
}

.checkbox-option input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-custom {
  width: 22px;
  height: 22px;
  border: 2px solid var(--divider);
  border-radius: 8px;
  position: relative;
  transition: all 0.3s ease;
  flex-shrink: 0;
  background: var(--bg-secondary);
}

.checkbox-option input[type="checkbox"]:checked + .checkbox-custom {
  border-color: var(--accent-secondary);
  background: var(--accent-secondary);
  box-shadow: var(--glow-cyan);
}

.checkbox-option input[type="checkbox"]:checked + .checkbox-custom::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 14px;
  font-weight: bold;
}

.checkbox-option input[type="checkbox"]:checked ~ .checkbox-content {
  color: var(--text-primary);
}

.checkbox-option input[type="checkbox"]:checked ~ .checkbox-content i {
  color: var(--accent-secondary);
  text-shadow: var(--glow-cyan);
}

.checkbox-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.4rem;
}

.checkbox-content i {
  font-size: 1.6rem;
  color: var(--accent-secondary);
  margin-bottom: 0.3rem;
}

.checkbox-content span {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.form-actions {
  background: rgba(42, 42, 62, 0.7);
  border-radius: 16px;
  padding: 2.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(10px);
}

.privacy-notice {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 2.5rem;
  color: var(--text-secondary);
  font-size: 1rem;
}

.privacy-notice i {
  color: var(--accent-primary);
  font-size: 1.2rem;
}

.submit-section {
  display: flex;
  gap: 1.5rem;
  justify-content: flex-end;
  align-items: center;
}

.btn-secondary {
  background: var(--surface);
  border: 2px solid var(--border);
  color: var(--text-secondary);
  padding: 1rem 2rem;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.7rem;
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--surface-hover);
  border-color: var(--accent-secondary);
  transform: translateY(-2px);
  color: var(--text-primary);
  box-shadow: var(--shadow-md), var(--glow-cyan);
}

.submit-btn {
  background: var(--accent-gradient);
  border: none;
  color: white;
  padding: 1rem 2rem;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  letter-spacing: 0.02em;
}

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

.submit-btn:active {
  transform: translateY(-1px);
}

.submit-btn.loading .btn-loading {
  display: inline-block;
}

.btn-loading {
  display: none;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.survey-footer {
  background: rgba(17, 24, 39, 0.85);
  backdrop-filter: blur(8px);
  border-radius: 0 0 16px 16px;
  padding: 2rem;
  text-align: center;
  border-top: 1px solid var(--divider);
  box-shadow: var(--shadow-lg);
}

.footer-content p {
  color: var(--text-secondary);
  margin-bottom: 0.7rem;
  font-size: 1rem;
}

.footer-note {
  color: var(--accent-primary);
  font-weight: 600;
  text-shadow: var(--glow-pink);
}

/* Success Modal */
.success-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(10px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  animation: fadeIn 0.3s ease;
}

.success-content {
  background: linear-gradient(135deg, rgba(20, 20, 32, 0.98), rgba(30, 30, 45, 0.98));
  border: 2px solid var(--accent-primary);
  border-radius: 20px;
  padding: 3rem;
  max-width: 500px;
  width: 90%;
  text-align: center;
  box-shadow: 0 0 50px rgba(147, 51, 234, 0.5);
  animation: slideUp 0.4s ease;
}

.success-icon {
  font-size: 5rem;
  color: var(--success);
  margin-bottom: 1.5rem;
  animation: scaleIn 0.5s ease;
}

.success-content h2 {
  color: var(--text-primary);
  font-size: 2rem;
  margin-bottom: 1rem;
}

.success-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.success-message {
  color: var(--accent-primary);
  font-weight: 600;
  margin-bottom: 2rem !important;
}

.success-content .btn {
  margin: 0.5rem;
  min-width: 200px;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes scaleIn {
  from {
    transform: scale(0);
  }
  to {
    transform: scale(1);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .survey-wrapper {
    padding: 1rem;
  }
  
  .header-content {
    flex-direction: column;
    text-align: center;
  }
  
  .progress-indicator {
    width: 100%;
    justify-content: center;
  }
  
  .input-row {
    grid-template-columns: 1fr;
  }
  
  .radio-group {
    grid-template-columns: 1fr;
  }
  
  .checkbox-grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }
  
  .submit-section {
    flex-direction: column;
    align-items: stretch;
  }
  
  .form-container {
    padding: 2rem;
  }
}

@media (max-width: 480px) {
  .header-text h1 {
    font-size: 1.5rem;
  }
  
  .form-container {
    padding: 1.5rem;
  }
  
  .checkbox-grid {
    grid-template-columns: 1fr;
  }
}

/* Animation for form elements */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.form-section {
  animation: fadeInUp 0.6s ease-out;
}

.form-section:nth-child(2) {
  animation-delay: 0.1s;
}

.form-section:nth-child(3) {
  animation-delay: 0.2s;
}

.form-section:nth-child(4) {
  animation-delay: 0.3s;
}