/* ===== GOOGLE FONTS & CSS VARIABLES ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Color Palette - Professional & Accessible */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;
  
  --secondary-50: #f0fdf4;
  --secondary-100: #dcfce7;
  --secondary-200: #bbf7d0;
  --secondary-500: #10b981;
  --secondary-600: #059669;
  --secondary-700: #047857;
  
  --accent-50: #fef2f2;
  --accent-100: #fee2e2;
  --accent-500: #ef4444;
  --accent-600: #dc2626;
  --accent-700: #b91c1c;
  
  --neutral-50: #f8fafc;
  --neutral-100: #f1f5f9;
  --neutral-200: #e2e8f0;
  --neutral-300: #cbd5e1;
  --neutral-400: #94a3b8;
  --neutral-500: #64748b;
  --neutral-600: #475569;
  --neutral-700: #334155;
  --neutral-800: #1e293b;
  --neutral-900: #0f172a;
  
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* Semantic Colors */
  --bg-primary: #ffffff;
  --bg-secondary: var(--neutral-50);
  --bg-overlay: rgba(15, 23, 42, 0.6);
  
  --text-primary: var(--neutral-900);
  --text-secondary: var(--neutral-700);
  --text-muted: var(--neutral-500);
  --text-inverse: #ffffff;
  
  --border-light: var(--neutral-200);
  --border-medium: var(--neutral-300);
  --border-dark: var(--neutral-400);
  
  /* Enhanced Typography Scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  
  /* Extended Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Enhanced Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-base: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Layout */
  --navbar-height: 4rem;
  --navbar-height-scrolled: 3.5rem;
}

/* ===== BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  background-attachment: fixed;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== REGISTRATION WRAPPER ===== */
.registration-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  background: linear-gradient(135deg, 
    var(--primary-500) 0%, 
    var(--primary-700) 25%, 
    var(--secondary-600) 75%, 
    var(--secondary-700) 100%);
  background-attachment: fixed;
  position: relative;
}

.registration-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.2) 0%, transparent 50%);
  pointer-events: none;
}

.registration-container {
  max-width: 28rem;
  width: 100%;
  background: var(--bg-primary);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  overflow: hidden;
  transition: all var(--transition-base);
  position: relative;
  z-index: 1;
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.registration-container:hover {
  transform: translateY(-4px);
  box-shadow: 
    var(--shadow-2xl),
    0 0 0 1px rgba(255, 255, 255, 0.1);
}

/* ===== HEADER SECTION ===== */
.registration-header {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-800));
  color: var(--text-inverse);
  padding: var(--space-12) var(--space-8) var(--space-8);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.registration-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    var(--secondary-500), 
    var(--warning), 
    var(--primary-400));
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.logo {
  width: 5rem;
  height: 5rem;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-6);
  font-size: var(--text-3xl);
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.2);
  transition: all var(--transition-base);
}

.logo:hover {
  transform: scale(1.05) rotate(5deg);
  background: rgba(255, 255, 255, 0.25);
}

.registration-header h2 {
  font-size: var(--text-3xl);
  font-weight: 800;
  margin-bottom: var(--space-3);
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #ffffff, var(--neutral-100));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.registration-header p {
  font-size: var(--text-base);
  opacity: 0.9;
  font-weight: 400;
  color: var(--primary-100);
  max-width: 24rem;
  margin: 0 auto;
  line-height: 1.5;
}

/* ===== PROGRESS STEPS ===== */
.registration-progress {
  display: flex;
  justify-content: center;
  margin-bottom: var(--space-8);
  padding: 0 var(--space-8);
  position: relative;
}

.registration-progress::before {
  content: '';
  position: absolute;
  top: 1.25rem;
  left: 20%;
  right: 20%;
  height: 3px;
  background: linear-gradient(90deg, 
    var(--primary-500) 0%, 
    var(--neutral-200) 0%);
  z-index: 1;
  border-radius: 2px;
  transition: all var(--transition-slow);
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
  flex: 1;
}

.step-number {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--neutral-100);
  border: 3px solid var(--neutral-300);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--neutral-500);
  margin-bottom: var(--space-3);
  position: relative;
  transition: all var(--transition-base);
  font-size: var(--text-sm);
}

.progress-step.active .step-number {
  background: var(--primary-500);
  border-color: var(--primary-500);
  color: white;
  box-shadow: 
    var(--shadow-lg),
    0 0 0 4px rgba(59, 130, 246, 0.1);
  transform: scale(1.1);
}

.progress-step.completed .step-number {
  background: var(--success);
  border-color: var(--success);
  color: white;
  box-shadow: var(--shadow-md);
}

.progress-step.completed .step-number::after {
  content: '✓';
  font-weight: 700;
}

.step-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--neutral-500);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: all var(--transition-base);
}

.progress-step.active .step-label {
  color: var(--primary-600);
  font-weight: 700;
}

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

/* ===== BODY SECTION ===== */
.registration-body {
  padding: var(--space-8) var(--space-8) var(--space-10);
}

.registration-form {
  animation: slideInUp 0.6s ease-out;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== FORM SECTIONS ===== */
.form-section {
  display: none;
  animation: fadeIn 0.4s ease-out;
}

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

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

/* ===== FORM GROUPS ===== */
.form-group {
  margin-bottom: var(--space-6);
  position: relative;
}

.form-label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-label i {
  color: var(--primary-500);
  font-size: var(--text-sm);
  width: 1rem;
}

.form-control {
  width: 100%;
  padding: var(--space-4) var(--space-5);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-family: 'Inter', sans-serif;
  transition: all var(--transition-base);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-weight: 500;
}

.form-control::placeholder {
  color: var(--neutral-400);
  font-weight: 400;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 
    0 0 0 4px rgba(59, 130, 246, 0.1),
    var(--shadow-sm);
  transform: translateY(-1px);
}

.form-control.valid {
  border-color: var(--success);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.1);
}

.form-control.error {
  border-color: var(--error);
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

/* ===== PASSWORD WRAPPER ===== */
.password-wrapper {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--neutral-500);
  cursor: pointer;
  transition: var(--transition-fast);
  padding: var(--space-2);
  border-radius: var(--radius-base);
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.password-toggle:hover {
  color: var(--neutral-700);
  background: var(--neutral-100);
  transform: translateY(-50%) scale(1.1);
}

/* ===== COMPANY TOGGLE ===== */
.company-toggle {
  background: var(--neutral-50);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  border: 2px solid var(--border-light);
  transition: all var(--transition-base);
  cursor: pointer;
}

.company-toggle:hover {
  border-color: var(--primary-300);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.company-toggle.active {
  border-color: var(--primary-500);
  background: linear-gradient(135deg, var(--primary-50), var(--neutral-50));
  box-shadow: var(--shadow-lg);
}

.toggle-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.toggle-label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--text-base);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.toggle-label i {
  color: var(--primary-500);
  font-size: var(--text-lg);
}

.toggle-switch {
  width: 3.5rem;
  height: 2rem;
  background: var(--neutral-300);
  border-radius: 1rem;
  position: relative;
  transition: all var(--transition-base);
  flex-shrink: 0;
  cursor: pointer;
  border: 2px solid transparent;
}

.toggle-switch::before {
  content: '';
  position: absolute;
  width: 1.5rem;
  height: 1.5rem;
  background: white;
  border-radius: 50%;
  top: 0.1rem;
  left: 0.1rem;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
}

.company-toggle.active .toggle-switch {
  background: var(--success);
  border-color: var(--success);
}

.company-toggle.active .toggle-switch::before {
  left: 1.7rem;
  background: white;
}

.company-fields {
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-base);
  opacity: 0;
}

.company-toggle.active .company-fields {
  max-height: 30rem;
  margin-top: var(--space-6);
  opacity: 1;
  animation: slideDown 0.4s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== PASSWORD STRENGTH ===== */
.password-strength {
  margin-top: var(--space-4);
  padding: var(--space-4);
  background: var(--neutral-50);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--neutral-300);
}

.requirement {
  display: flex;
  align-items: center;
  margin-bottom: var(--space-2);
  color: var(--neutral-500);
  font-size: var(--text-sm);
  transition: all var(--transition-base);
  font-weight: 500;
}

.requirement:last-child {
  margin-bottom: 0;
}

.requirement.valid {
  color: var(--success);
}

.requirement.invalid {
  color: var(--error);
}

.requirement i {
  margin-right: var(--space-3);
  font-size: var(--text-xs);
  width: 1rem;
  text-align: center;
  transition: all var(--transition-base);
}

.requirement.valid i {
  transform: scale(1.2);
}

/* ===== OTP SECTION ===== */
.otp-section {
  background: linear-gradient(135deg, var(--primary-50), var(--neutral-50));
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin: var(--space-6) 0;
  border-left: 4px solid var(--primary-500);
  box-shadow: var(--shadow-md);
  animation: slideInUp 0.4s ease-out;
}

.otp-input-group {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-4);
  align-items: flex-start;
}

.otp-input {
  flex: 1;
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: 0.2em;
  text-align: center;
  padding: var(--space-4);
}

.otp-btn {
  padding: var(--space-4) var(--space-6);
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-base);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  box-shadow: var(--shadow-md);
}

.otp-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.otp-btn:disabled {
  background: var(--neutral-400);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.send-otp-btn {
  width: 100%;
  padding: var(--space-4) var(--space-6);
  background: linear-gradient(135deg, var(--secondary-500), var(--secondary-600));
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-base);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  box-shadow: var(--shadow-md);
}

.send-otp-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--secondary-600), var(--secondary-700));
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.send-otp-btn:disabled {
  background: var(--neutral-400);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.verification-status {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-4);
  font-weight: 600;
  font-size: var(--text-sm);
  min-height: 1.5rem;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.verified {
  color: var(--success);
  background: var(--secondary-50);
  border: 1px solid var(--secondary-200);
}

.not-verified {
  color: var(--error);
  background: var(--accent-50);
  border: 1px solid var(--accent-200);
}

.countdown {
  font-size: var(--text-sm);
  color: var(--neutral-600);
  margin-top: var(--space-3);
  font-weight: 500;
  text-align: center;
  padding: var(--space-2) var(--space-4);
  background: var(--neutral-100);
  border-radius: var(--radius-base);
}

.success-checkmark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--success);
  color: white;
  border-radius: 50%;
  font-size: var(--text-sm);
  font-weight: bold;
  animation: bounceIn 0.6s ease-out;
}

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

/* ===== BUTTONS ===== */
.submit-btn {
  width: 100%;
  padding: var(--space-5) var(--space-8);
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border: none;
  border-radius: var(--radius-xl);
  font-size: var(--text-base);
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
  margin-top: var(--space-4);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  box-shadow: var(--shadow-lg);
  letter-spacing: 0.025em;
}

.submit-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 var(--transition-slow);
}

.submit-btn:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: 
    var(--shadow-xl),
    0 0 0 1px rgba(255, 255, 255, 0.1);
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
}

.submit-btn:hover:not(:disabled)::before {
  left: 100%;
}

.submit-btn:disabled {
  background: var(--neutral-400);
  cursor: not-allowed;
  transform: none;
  box-shadow: var(--shadow-sm);
  opacity: 0.7;
}

.submit-btn:disabled::before {
  display: none;
}

.btn-outline {
  padding: var(--space-4) var(--space-6);
  background: transparent;
  color: var(--primary-600);
  border: 2px solid var(--primary-600);
  border-radius: var(--radius-lg);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.btn-outline:hover {
  background: var(--primary-600);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===== FORM NAVIGATION ===== */
.form-navigation {
  display: flex;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.form-navigation .submit-btn {
  flex: 2;
  margin-top: 0;
}

.form-navigation .btn-outline {
  flex: 1;
}

/* ===== FEEDBACK & VALIDATION ===== */
.username-feedback {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-base);
  min-height: 1.5rem;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-base);
}

.username-feedback.valid {
  color: var(--success);
  background: var(--secondary-50);
  border: 1px solid var(--secondary-200);
}

.username-feedback.error {
  color: var(--error);
  background: var(--accent-50);
  border: 1px solid var(--accent-200);
}

.username-feedback.loading {
  color: var(--neutral-600);
  background: var(--neutral-100);
  border: 1px solid var(--neutral-200);
}

.validation-loader {
  width: 1rem;
  height: 1rem;
  border: 2px solid var(--neutral-300);
  border-top: 2px solid var(--primary-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.field-error {
  color: var(--error);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 1.5rem;
  padding: var(--space-2) var(--space-3);
  background: var(--accent-50);
  border: 1px solid var(--accent-200);
  border-radius: var(--radius-base);
  font-weight: 500;
}

.alert {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  border-left: 4px solid;
}

.alert-error {
  background: var(--accent-50);
  color: var(--accent-700);
  border-left-color: var(--accent-500);
}

.alert i {
  font-size: var(--text-lg);
}

.errorlist {
  list-style: none;
  padding: 0;
  color: var(--error);
  font-size: var(--text-sm);
  margin-top: var(--space-2);
  font-weight: 500;
}

/* ===== LOGIN REDIRECT ===== */
.login-redirect {
  text-align: center;
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-light);
}

.login-redirect p {
  color: var(--text-secondary);
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.login-redirect a {
  color: var(--primary-600);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-base);
}

.login-redirect a:hover {
  color: var(--primary-700);
  background: var(--primary-50);
  transform: translateY(-1px);
}

/* ===== LOADING STATES ===== */
.loading {
  opacity: 0.7;
  pointer-events: none;
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 1.5rem;
  height: 1.5rem;
  margin: -0.75rem 0 0 -0.75rem;
  border: 3px solid transparent;
  border-top: 3px solid currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ===== RESPONSIVE DESIGN ===== */

/* Tablets */
@media (max-width: 1024px) {
  .registration-container {
    max-width: 26rem;
  }
  
  .registration-header {
    padding: var(--space-10) var(--space-6) var(--space-6);
  }
  
  .registration-body {
    padding: var(--space-6) var(--space-6) var(--space-8);
  }
}

/* Mobile Landscape */
@media (max-width: 768px) {
  .registration-wrapper {
    padding: var(--space-6) var(--space-4);
    align-items: flex-start;
    min-height: 100vh;
  }

  .registration-container {
    margin: 0;
    max-width: none;
    border-radius: var(--radius-xl);
  }

  .registration-header {
    padding: var(--space-8) var(--space-6) var(--space-6);
  }

  .registration-body {
    padding: var(--space-6) var(--space-6) var(--space-8);
  }

  .registration-header h2 {
    font-size: var(--text-2xl);
  }

  .logo {
    width: 4rem;
    height: 4rem;
    font-size: var(--text-2xl);
  }

  .form-control {
    padding: var(--space-4);
    font-size: 16px;
  }

  .otp-input-group {
    flex-direction: column;
  }

  .otp-btn {
    width: 100%;
  }

  .form-navigation {
    flex-direction: column;
  }

  .registration-progress::before {
    left: 15%;
    right: 15%;
  }
}

/* Mobile Portrait */
@media (max-width: 480px) {
  .registration-wrapper {
    padding: var(--space-4) var(--space-3);
  }

  .registration-header {
    padding: var(--space-6) var(--space-4) var(--space-5);
  }

  .registration-body {
    padding: var(--space-5) var(--space-4) var(--space-6);
  }

  .logo {
    width: 3.5rem;
    height: 3.5rem;
    font-size: var(--text-xl);
  }

  .registration-header h2 {
    font-size: var(--text-xl);
  }

  .company-toggle {
    padding: var(--space-4);
  }

  .registration-progress::before {
    left: 10%;
    right: 10%;
  }

  .step-number {
    width: 2rem;
    height: 2rem;
    font-size: var(--text-xs);
  }

  .step-label {
    font-size: 0.65rem;
  }

  .submit-btn {
    padding: var(--space-4) var(--space-6);
  }

  .otp-section {
    padding: var(--space-4);
  }
}

/* Small Mobile Devices */
@media (max-width: 360px) {
  .registration-wrapper {
    padding: var(--space-3) var(--space-2);
  }

  .registration-header {
    padding: var(--space-5) var(--space-3) var(--space-4);
  }

  .registration-body {
    padding: var(--space-4) var(--space-3) var(--space-5);
  }

  .form-group {
    margin-bottom: var(--space-4);
  }

  .form-control {
    padding: var(--space-3);
  }

  .submit-btn {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-light: #334155;
  }
  
  .registration-container {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
  }
  
  .form-control {
    background: var(--bg-secondary);
    border-color: var(--border-light);
    color: var(--text-primary);
  }
  
  .company-toggle {
    background: var(--bg-secondary);
  }
  
  .password-strength {
    background: var(--bg-secondary);
  }
}

/* High Contrast Support */
@media (prefers-contrast: high) {
  :root {
    --primary-500: #0056b3;
    --secondary-500: #00875a;
    --error: #d13212;
  }
  
  .form-control:focus {
    outline: 2px solid var(--primary-500);
  }
}

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

/* Print Styles */
@media print {
  .registration-wrapper {
    background: white !important;
  }
  
  .registration-container {
    box-shadow: none !important;
    border: 1px solid #000 !important;
  }
  
  .password-toggle,
  .toggle-switch {
    display: none !important;
  }
}