/* ============================================
   METINGZ REGISTRATION PAGE - PREMIUM DESIGN
   ============================================ */

/* ===== VARIABLES & DESIGN SYSTEM ===== */
:root {
  /* Premium Color Palette */
  --register-primary: #1a56db;
  --register-primary-dark: #1e40af;
  --register-primary-light: #3b82f6;
  --register-primary-glow: rgba(26, 86, 219, 0.3);
  
  --register-secondary: #7e3af2;
  --register-secondary-light: #9061f9;
  --register-secondary-glow: rgba(126, 58, 242, 0.3);
  
  --register-accent: #0ea5e9;
  --register-accent-glow: rgba(14, 165, 233, 0.3);
  
  --register-success: #10b981;
  --register-error: #ef4444;
  --register-warning: #f59e0b;
  
  /* UI Colors - Light Mode Only */
  --white: #ffffff;
  --bg-primary: #f8faff;
  --bg-secondary: #f1f5f9;
  --text-primary: #111827;
  --text-secondary: #374151;
  --text-muted: #6b7280;
  --text-light: #9ca3af;
  --border-color: #e5e7eb;
  
  /* Premium Gradients */
  --register-gradient-main: linear-gradient(135deg, #1a56db 0%, #7e3af2 50%, #0ea5e9 100%);
  --register-gradient-subtle: linear-gradient(135deg, rgba(26, 86, 219, 0.05) 0%, rgba(126, 58, 242, 0.05) 50%, rgba(14, 165, 233, 0.05) 100%);
  --register-gradient-glow: radial-gradient(circle at 30% 40%, rgba(26, 86, 219, 0.15) 0%, rgba(126, 58, 242, 0.1) 40%, rgba(14, 165, 233, 0.05) 70%, transparent 100%);
  --register-gradient-shine: linear-gradient(135deg, rgba(255,255,255,0.3) 0%, transparent 50%, rgba(255,255,255,0.1) 100%);
  
  /* Premium Shadows */
  --register-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --register-shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
  --register-shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
  --register-shadow-xl: 0 30px 80px rgba(0, 0, 0, 0.15);
  --register-shadow-glow: 0 0 60px rgba(26, 86, 219, 0.15);
  --register-shadow-primary: 0 8px 32px rgba(26, 86, 219, 0.3);
  --register-shadow-secondary: 0 8px 32px rgba(126, 58, 242, 0.3);
  
  /* Premium Borders */
  --register-border-glow: 1px solid rgba(26, 86, 219, 0.2);
  --register-border-premium: 1px solid rgba(255, 255, 255, 0.2);
  
  /* Typography */
  --register-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  
  /* Text Sizes */
  --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;
  
  /* Spacing - Premium Proportions */
  --register-space-xs: 0.25rem;
  --register-space-sm: 0.5rem;
  --register-space-md: 1rem;
  --register-space-lg: 1.5rem;
  --register-space-xl: 2rem;
  --register-space-2xl: 2.5rem;
  
  /* Border Radius - Premium Rounded */
  --register-radius-sm: 8px;
  --register-radius-md: 12px;
  --register-radius-lg: 16px;
  --register-radius-xl: 20px;
  --register-radius-2xl: 28px;
  --register-radius-full: 9999px;
  
  /* Transitions */
  --register-transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --register-transition-smooth: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index */
  --register-z-header: 10;
  --register-z-form: 20;
  --register-z-overlay: 30;
  --register-z-modal: 40;
}

/* ============================================
   PAGE WRAPPER - PREMIUM BACKGROUND
   ============================================ */

.registration-wrapper {
  min-height: calc(100vh - var(--navbar-height, 64px) - 60px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--register-space-md);
  position: relative;
  overflow: hidden;
  background: 
    radial-gradient(ellipse at 10% 20%, rgba(26, 86, 219, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 90% 80%, rgba(126, 58, 242, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(14, 165, 233, 0.05) 0%, transparent 70%),
    var(--bg-primary);
}

/* Premium Animated Background */
.registration-wrapper::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: var(--register-gradient-glow);
  animation: floatBackground 20s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}

@keyframes floatBackground {
  0% { transform: translate(0, 0) scale(1) rotate(0deg); }
  33% { transform: translate(5%, 5%) scale(1.1) rotate(2deg); }
  66% { transform: translate(-5%, -5%) scale(0.9) rotate(-2deg); }
  100% { transform: translate(0, 0) scale(1) rotate(0deg); }
}

/* Premium Floating Orbs */
.registration-wrapper::after {
  content: '';
  position: fixed;
  width: 600px;
  height: 600px;
  top: -200px;
  right: -200px;
  background: radial-gradient(circle, rgba(126, 58, 242, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  animation: floatOrb 15s ease-in-out infinite alternate;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-100px, 100px) scale(1.2); }
}

/* ===== REGISTRATION CONTAINER - PREMIUM GLASS ===== */
.registration-container {
  position: relative;
  z-index: var(--register-z-form);
  width: 100%;
  max-width: 520px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(40px) saturate(1.2);
  -webkit-backdrop-filter: blur(40px) saturate(1.2);
  border-radius: var(--register-radius-2xl);
  box-shadow: 
    var(--register-shadow-xl),
    var(--register-shadow-glow),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: var(--register-space-2xl);
  animation: slideUpPremium 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
  transition: var(--register-transition-smooth);
  overflow: hidden;
}

/* Premium Shine Overlay */
.registration-container::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: var(--register-gradient-shine);
  transform: rotate(25deg);
  pointer-events: none;
  opacity: 0.3;
  animation: shineSlide 8s ease-in-out infinite;
}

@keyframes shineSlide {
  0% { transform: translate(-30%, -30%) rotate(25deg); }
  50% { transform: translate(30%, 30%) rotate(25deg); }
  100% { transform: translate(-30%, -30%) rotate(25deg); }
}

/* Premium Border Glow */
.registration-container::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: var(--register-radius-2xl);
  padding: 2px;
  background: var(--register-gradient-main);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.5;
  transition: var(--register-transition);
}

.registration-container:hover::after {
  opacity: 0.8;
}

@keyframes slideUpPremium {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ===== HEADER SECTION - PREMIUM ===== */
.registration-header {
  text-align: center;
  margin-bottom: var(--register-space-xl);
  position: relative;
}

/* Premium Logo */
.registration-header .logo {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--register-space-md);
  background: transparent;
  border-radius: var(--register-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: var(--register-transition);
  padding: 0;
}

/* Logo Image Styling */
.logo-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: var(--register-transition-smooth);
  filter: drop-shadow(0 4px 20px rgba(26, 86, 219, 0.15));
  animation: logoFloat 3s ease-in-out infinite;
}

/* Premium Hover Effect */
.registration-header .logo:hover .logo-image {
  transform: scale(1.05) rotate(-2deg);
  filter: drop-shadow(0 8px 30px rgba(26, 86, 219, 0.25));
}

/* Logo Animation */
@keyframes logoFloat {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-5px);
  }
}

.registration-header h2 {
  font-size: var(--text-3xl);
  font-weight: 800;
  margin-bottom: var(--register-space-xs);
  background: var(--register-gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
  position: relative;
  display: inline-block;
}

.registration-header h2::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 3px;
  border-radius: var(--register-radius-full);
  background: var(--register-gradient-main);
  animation: expandLine 2s ease-in-out infinite;
}

@keyframes expandLine {
  0%, 100% { width: 40px; opacity: 0.6; }
  50% { width: 60px; opacity: 1; }
}

.registration-header p {
  color: var(--text-muted);
  font-size: var(--text-base);
  font-weight: 400;
  margin: var(--register-space-sm) 0 0;
  letter-spacing: 0.01em;
}

/* ===== PROGRESS STEPS - PREMIUM ===== */
.registration-progress {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--register-space-xl);
  padding: 0 var(--register-space-sm);
  position: relative;
}

.registration-progress::before {
  content: '';
  position: absolute;
  top: 24px;
  left: 30px;
  right: 30px;
  height: 2px;
  background: var(--border-color);
  z-index: 0;
  border-radius: var(--register-radius-full);
}

.registration-progress::after {
  content: '';
  position: absolute;
  top: 24px;
  left: 30px;
  height: 2px;
  background: var(--register-gradient-main);
  z-index: 0;
  width: 0%;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--register-radius-full);
  box-shadow: 0 0 20px rgba(26, 86, 219, 0.3);
}

.registration-progress[data-progress="1"]::after { width: 0%; }
.registration-progress[data-progress="2"]::after { width: 50%; }
.registration-progress[data-progress="3"]::after { width: 100%; }

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--register-space-xs);
  position: relative;
  z-index: 1;
  cursor: pointer;
  transition: var(--register-transition);
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: var(--register-radius-full);
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--text-muted);
  transition: var(--register-transition);
  position: relative;
}

.step-number::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: var(--register-radius-full);
  background: var(--register-gradient-main);
  opacity: 0;
  transition: var(--register-transition);
}

.progress-step.active .step-number {
  background: var(--register-gradient-main);
  border-color: var(--register-primary);
  color: white;
  box-shadow: var(--register-shadow-primary);
  transform: scale(1.05);
}

.progress-step.active .step-number::before {
  opacity: 0.3;
  filter: blur(8px);
  animation: pulseGlow 2s ease-in-out infinite;
}

.progress-step.completed .step-number {
  background: var(--register-success);
  border-color: var(--register-success);
  color: white;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
}

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

.step-label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: var(--register-transition);
}

.progress-step.active .step-label,
.progress-step.completed .step-label {
  color: var(--text-primary);
  font-weight: 700;
  background: var(--register-gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== FORM SECTIONS ===== */
.form-section {
  display: none;
  animation: fadeInPremium 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

@keyframes fadeInPremium {
  from {
    opacity: 0;
    transform: translateX(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

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

/* Premium Floating Labels */
.form-group {
  position: relative;
}

.form-label {
  display: flex;
  align-items: center;
  gap: var(--register-space-sm);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: var(--register-space-xs);
  transition: var(--register-transition);
}

.form-label i {
  color: var(--register-primary);
  font-size: var(--text-base);
  transition: var(--register-transition);
}

.form-group:focus-within .form-label i {
  color: var(--register-secondary);
  transform: scale(1.1);
}

/* Premium Input Fields */
.form-control {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--register-font);
  font-size: var(--text-base);
  color: var(--text-primary);
  background: rgba(248, 250, 252, 0.8);
  border: 2px solid var(--border-color);
  border-radius: var(--register-radius-md);
  transition: var(--register-transition);
  outline: none;
  position: relative;
}

.form-control::placeholder {
  color: var(--text-light);
  font-weight: 400;
  transition: var(--register-transition);
}

.form-control:focus {
  border-color: var(--register-primary);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.08), var(--register-shadow-sm);
  transform: translateY(-1px);
}

.form-control:focus::placeholder {
  opacity: 0.6;
  transform: translateX(4px);
}

.form-control.error {
  border-color: var(--register-error);
  background: rgba(239, 68, 68, 0.05);
  box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.08);
}

.form-control.valid {
  border-color: var(--register-success);
  background: rgba(16, 185, 129, 0.05);
  box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.08);
}

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

.password-wrapper .form-control {
  padding-right: 48px;
}

.password-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--register-radius-sm);
  transition: var(--register-transition);
}

.password-toggle:hover {
  color: var(--register-primary);
  background: rgba(26, 86, 219, 0.08);
}

.password-toggle:active {
  transform: translateY(-50%) scale(0.9);
}

/* ===== PASSWORD STRENGTH - PREMIUM ===== */
.password-strength {
  margin-top: var(--register-space-sm);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--register-space-xs);
}

.requirement {
  display: flex;
  align-items: center;
  gap: var(--register-space-xs);
  font-size: 11px;
  color: var(--text-muted);
  padding: 4px 10px;
  background: rgba(248, 250, 252, 0.6);
  border-radius: var(--register-radius-sm);
  transition: var(--register-transition);
  border: 1px solid transparent;
}

.requirement.valid {
  color: var(--register-success);
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.2);
}

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

.requirement.invalid {
  color: var(--register-error);
  background: rgba(239, 68, 68, 0.06);
  border-color: rgba(239, 68, 68, 0.1);
}

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

.requirement i {
  font-size: 10px;
  transition: var(--register-transition);
}

/* ===== FIELD FEEDBACK - PREMIUM ===== */
.field-error {
  font-size: var(--text-sm);
  margin-top: var(--register-space-xs);
  display: flex;
  align-items: center;
  gap: var(--register-space-sm);
  padding: var(--register-space-xs) var(--register-space-md);
  border-radius: var(--register-radius-sm);
  transition: var(--register-transition);
  animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.field-error.error {
  color: var(--register-error);
  background: rgba(239, 68, 68, 0.06);
}

.field-error.valid {
  color: var(--register-success);
  background: rgba(16, 185, 129, 0.06);
}

.field-error i {
  font-size: 14px;
}

/* ===== USERNAME FEEDBACK - PREMIUM ===== */
.username-feedback {
  font-size: var(--text-sm);
  margin-top: var(--register-space-xs);
  display: flex;
  align-items: center;
  gap: var(--register-space-sm);
  padding: var(--register-space-xs) var(--register-space-md);
  border-radius: var(--register-radius-sm);
  transition: var(--register-transition);
  animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.username-feedback.error {
  color: var(--register-error);
  background: rgba(239, 68, 68, 0.06);
}

.username-feedback.valid {
  color: var(--register-success);
  background: rgba(16, 185, 129, 0.06);
}

.username-feedback.loading {
  color: var(--register-primary);
  background: rgba(26, 86, 219, 0.06);
}

.validation-loader {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid rgba(26, 86, 219, 0.15);
  border-top: 2px solid var(--register-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ===== VERIFICATION SECTION - PREMIUM ===== */
.verification-header {
  text-align: center;
  margin-bottom: var(--register-space-xl);
}

.verification-header h3 {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--register-space-xs);
  background: var(--register-gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.verification-header h3 i {
  color: var(--register-primary);
  margin-right: var(--register-space-sm);
  -webkit-text-fill-color: initial;
}

.verification-header p {
  color: var(--text-muted);
  font-size: var(--text-base);
  margin: 0;
}

/* Premium Send OTP Button */
.send-otp-btn {
  width: 100%;
  padding: 14px 24px;
  background: var(--register-gradient-main);
  color: white;
  border: none;
  border-radius: var(--register-radius-md);
  font-size: var(--text-base);
  font-weight: 600;
  cursor: pointer;
  transition: var(--register-transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--register-space-sm);
  box-shadow: var(--register-shadow-primary);
  position: relative;
  overflow: hidden;
}

.send-otp-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transition: left 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.send-otp-btn:hover::before {
  left: 100%;
}

.send-otp-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(26, 86, 219, 0.4);
}

.send-otp-btn:active {
  transform: translateY(-1px) scale(0.98);
}

.send-otp-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.send-otp-btn.loading {
  opacity: 0.8;
}

.send-otp-btn.loading i {
  animation: spin 0.8s linear infinite;
}

/* OTP Section */
.otp-section {
  margin-top: var(--register-space-lg);
  animation: slideDown 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-15px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.otp-input-group {
  display: flex;
  gap: var(--register-space-md);
}

.otp-input-group .form-control {
  flex: 1;
  text-align: center;
  font-size: var(--text-2xl);
  letter-spacing: 0.3em;
  font-weight: 700;
  font-family: 'Inter', monospace;
  background: rgba(248, 250, 252, 0.8);
  transition: var(--register-transition);
}

.otp-input-group .form-control:focus {
  letter-spacing: 0.4em;
  background: white;
}

.otp-input-group .form-control::placeholder {
  letter-spacing: 0.1em;
  font-weight: 400;
}

/* Premium OTP Verify Button */
.otp-btn {
  padding: 14px 28px;
  background: var(--register-gradient-main);
  color: white;
  border: none;
  border-radius: var(--register-radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--register-transition);
  white-space: nowrap;
  box-shadow: var(--register-shadow-primary);
  position: relative;
  overflow: hidden;
}

.otp-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 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.otp-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(26, 86, 219, 0.4);
}

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

.otp-btn.loading i {
  animation: spin 0.8s linear infinite;
}

.countdown {
  text-align: center;
  margin-top: var(--register-space-sm);
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.countdown.warning {
  color: var(--register-warning);
  font-weight: 600;
}

.countdown.expired {
  color: var(--register-error);
  font-weight: 700;
  animation: pulseText 1s ease-in-out infinite;
}

@keyframes pulseText {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* Verification Status - Premium */
.verification-status {
  margin-top: var(--register-space-md);
  padding: var(--register-space-sm) var(--register-space-md);
  border-radius: var(--register-radius-md);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--register-space-sm);
  transition: var(--register-transition);
  font-size: var(--text-sm);
}

.verification-status.success {
  color: var(--register-success);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.15);
}

.verification-status.error {
  color: var(--register-error);
  background: rgba(239, 68, 68, 0.06);
  border: 1px solid rgba(239, 68, 68, 0.1);
}

.verification-status i {
  font-size: 18px;
}

.success-animation {
  display: inline-block;
  animation: successPop 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes successPop {
  0% { transform: scale(0) rotate(-30deg); }
  50% { transform: scale(1.4) rotate(10deg); }
  100% { transform: scale(1) rotate(0deg); }
}

.success-animation i {
  font-size: 32px;
  color: var(--register-success);
}

/* ===== SUBMIT BUTTON - PREMIUM ===== */
.submit-btn {
  width: 100%;
  padding: 16px 24px;
  background: var(--register-gradient-main);
  color: white;
  border: none;
  border-radius: var(--register-radius-md);
  font-size: var(--text-base);
  font-weight: 700;
  cursor: pointer;
  transition: var(--register-transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--register-space-sm);
  box-shadow: var(--register-shadow-primary);
  position: relative;
  overflow: hidden;
}

.submit-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transition: left 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.submit-btn:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(26, 86, 219, 0.45);
}

.submit-btn:active:not(:disabled) {
  transform: translateY(-1px) scale(0.98);
}

.submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.submit-btn.loading {
  opacity: 0.8;
}

.submit-btn.loading i {
  animation: spin 0.8s linear infinite;
}

.submit-btn i {
  transition: var(--register-transition);
}

.submit-btn:hover:not(:disabled) i {
  transform: translateX(4px);
}

/* ===== FORM NAVIGATION - PREMIUM ===== */
.form-navigation {
  display: flex;
  gap: var(--register-space-md);
  margin-top: var(--register-space-xl);
}

.form-navigation .btn {
  flex: 1;
  padding: 12px 20px;
  border-radius: var(--register-radius-md);
  font-weight: 600;
  transition: var(--register-transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--register-space-sm);
  font-size: var(--text-sm);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--border-color);
  color: var(--text-secondary);
  position: relative;
  overflow: hidden;
}

.btn-outline::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: var(--register-gradient-main);
  opacity: 0.05;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-outline:hover::before {
  width: 300px;
  height: 300px;
}

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

.btn-outline i {
  transition: var(--register-transition);
}

.btn-outline:hover i {
  transform: translateX(-4px);
}

/* ===== LOGIN REDIRECT - PREMIUM ===== */
.login-redirect {
  text-align: center;
  margin-top: var(--register-space-xl);
  padding-top: var(--register-space-lg);
  border-top: 1px solid var(--border-color);
  position: relative;
}

.login-redirect::before {
  content: 'OR';
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  padding: 0 var(--register-space-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

.login-redirect p {
  color: var(--text-muted);
  font-size: var(--text-sm);
  margin: 0;
}

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

.login-redirect a:hover {
  color: var(--register-primary-dark);
  background: rgba(26, 86, 219, 0.06);
  transform: translateX(4px);
}

.login-redirect a i {
  transition: var(--register-transition);
}

.login-redirect a:hover i {
  transform: translateX(4px);
}

/* ===== ALERTS - PREMIUM ===== */
.alert {
  padding: var(--register-space-sm) var(--register-space-md);
  border-radius: var(--register-radius-md);
  margin-bottom: var(--register-space-md);
  display: flex;
  align-items: center;
  gap: var(--register-space-sm);
  font-weight: 500;
  font-size: var(--text-sm);
  animation: slideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-left: 4px solid;
}

.alert-error {
  background: rgba(239, 68, 68, 0.06);
  border-color: var(--register-error);
  color: var(--register-error);
}

.alert-error i {
  font-size: 16px;
}

.alert-success {
  background: rgba(16, 185, 129, 0.06);
  border-color: var(--register-success);
  color: var(--register-success);
}

.alert-success i {
  font-size: 16px;
}

/* ===== GLOBAL FORM ERROR ===== */
.global-error {
  margin-bottom: var(--register-space-md);
  animation: slideDown 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESPONSIVE DESIGN - PREMIUM
   ============================================ */

/* ===== LARGE DESKTOP (1200px+) ===== */
@media (min-width: 1200px) {
  .registration-container {
    max-width: 560px;
    padding: var(--register-space-2xl) var(--register-space-2xl);
  }
  
  .registration-header .logo {
    width: 90px;
    height: 90px;
  }
  
  .registration-header h2 {
    font-size: var(--text-4xl);
  }
}

/* ===== DESKTOP (992px - 1199px) ===== */
@media (max-width: 1199px) and (min-width: 992px) {
  .registration-container {
    max-width: 520px;
  }
}

/* ===== TABLET (768px - 991px) ===== */
@media (max-width: 991px) and (min-width: 768px) {
  .registration-container {
    max-width: 480px;
    padding: var(--register-space-xl);
  }
  
  .registration-header .logo {
    width: 70px;
    height: 70px;
  }
  
  .password-strength {
    grid-template-columns: 1fr;
  }
  
  .otp-input-group {
    flex-direction: column;
  }
  
  .otp-btn {
    width: 100%;
    justify-content: center;
  }
  
  .form-navigation {
    flex-direction: column;
  }
  
  .form-navigation .btn {
    width: 100%;
  }
}

/* ===== MOBILE (481px - 767px) ===== */
@media (max-width: 767px) and (min-width: 481px) {
  .registration-container {
    max-width: 100%;
    padding: var(--register-space-lg);
    border-radius: var(--register-radius-xl);
  }
  
  .registration-header .logo {
    width: 60px;
    height: 60px;
  }
  
  .registration-header h2 {
    font-size: var(--text-2xl);
  }
  
  .step-number {
    width: 40px;
    height: 40px;
    font-size: var(--text-sm);
  }
  
  .step-label {
    font-size: 9px;
  }
  
  .registration-progress::before,
  .registration-progress::after {
    top: 20px;
    left: 20px;
    right: 20px;
  }
  
  .form-group {
    margin-bottom: var(--register-space-md);
  }
  
  .password-strength {
    grid-template-columns: 1fr;
    gap: var(--register-space-xs);
  }
  
  .otp-input-group {
    flex-direction: column;
  }
  
  .otp-btn {
    width: 100%;
    justify-content: center;
  }
  
  .form-navigation {
    flex-direction: column;
    gap: var(--register-space-sm);
  }
  
  .form-navigation .btn {
    width: 100%;
  }
  
  .send-otp-btn {
    padding: 12px 20px;
  }
  
  .submit-btn {
    padding: 14px 20px;
  }
  
  .login-redirect {
    margin-top: var(--register-space-lg);
    padding-top: var(--register-space-md);
  }
}

/* ===== SMALL MOBILE (320px - 480px) ===== */
@media (max-width: 480px) {
  .registration-container {
    padding: var(--register-space-md);
    border-radius: var(--register-radius-lg);
  }
  
  .registration-header {
    margin-bottom: var(--register-space-lg);
  }
  
  .registration-header .logo {
    width: 50px;
    height: 50px;
    margin-bottom: var(--register-space-sm);
  }
  
  .registration-header h2 {
    font-size: var(--text-xl);
  }
  
  .registration-header p {
    font-size: var(--text-sm);
  }
  
  .registration-progress {
    margin-bottom: var(--register-space-md);
    padding: 0;
  }
  
  .progress-step {
    flex: 1;
  }
  
  .step-number {
    width: 34px;
    height: 34px;
    font-size: 11px;
  }
  
  .step-label {
    font-size: 7px;
    letter-spacing: 0.05em;
  }
  
  .registration-progress::before,
  .registration-progress::after {
    top: 17px;
    left: 16px;
    right: 16px;
  }
  
  .form-group {
    margin-bottom: var(--register-space-sm);
  }
  
  .form-label {
    font-size: 11px;
  }
  
  .form-control {
    padding: 8px 12px;
    font-size: var(--text-sm);
  }
  
  .password-toggle {
    right: 8px;
    padding: 4px;
  }
  
  .password-toggle i {
    font-size: var(--text-sm);
  }
  
  .password-strength {
    grid-template-columns: 1fr 1fr;
    gap: 3px;
  }
  
  .requirement {
    font-size: 9px;
    padding: 3px 6px;
  }
  
  .requirement i {
    font-size: 8px;
  }
  
  .submit-btn {
    padding: 12px 16px;
    font-size: var(--text-sm);
  }
  
  .send-otp-btn {
    padding: 10px 16px;
    font-size: var(--text-sm);
  }
  
  .otp-input-group .form-control {
    font-size: var(--text-lg);
    padding: 8px 12px;
  }
  
  .otp-btn {
    font-size: var(--text-sm);
    padding: 10px 16px;
  }
  
  .verification-header h3 {
    font-size: var(--text-lg);
  }
  
  .verification-header p {
    font-size: var(--text-sm);
  }
  
  .field-error,
  .username-feedback {
    font-size: 10px;
    padding: 3px 8px;
  }
  
  .form-navigation .btn {
    padding: 8px 14px;
    font-size: 11px;
  }
  
  .login-redirect {
    margin-top: var(--register-space-md);
    padding-top: var(--register-space-sm);
  }
  
  .login-redirect p {
    font-size: 11px;
  }
  
  .alert {
    padding: var(--register-space-xs) var(--register-space-sm);
    font-size: 11px;
  }
  
  .success-animation i {
    font-size: 24px;
  }
}

/* ===== EXTRA SMALL MOBILE (below 320px) ===== */
@media (max-width: 320px) {
  .registration-container {
    padding: var(--register-space-sm);
  }
  
  .registration-header .logo {
    width: 42px;
    height: 42px;
  }
  
  .registration-header h2 {
    font-size: var(--text-lg);
  }
  
  .step-number {
    width: 28px;
    height: 28px;
    font-size: 9px;
  }
  
  .step-label {
    font-size: 6px;
  }
  
  .form-control {
    padding: 6px 10px;
    font-size: 11px;
  }
  
  .password-strength {
    grid-template-columns: 1fr;
  }
  
  .requirement {
    font-size: 8px;
    padding: 2px 4px;
  }
  
  .submit-btn {
    padding: 8px 12px;
    font-size: 11px;
  }
  
  .send-otp-btn {
    padding: 8px 12px;
    font-size: 11px;
  }
  
  .otp-btn {
    font-size: 11px;
    padding: 6px 10px;
  }
}

/* ============================================
   REDUCED MOTION PREFERENCES
   ============================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .registration-container {
    animation: none;
  }
  
  .registration-wrapper::before,
  .registration-wrapper::after {
    animation: none;
  }
  
  .registration-header .logo-image {
    animation: none !important;
  }
  
  .registration-header .logo:hover .logo-image {
    transform: none !important;
  }
  
  .registration-header h2::after {
    animation: none;
  }
  
  .form-section {
    animation: none;
  }
  
  .otp-section {
    animation: none;
  }
  
  .success-animation {
    animation: none;
  }
  
  .field-error,
  .username-feedback {
    animation: none;
  }
  
  .send-otp-btn::before,
  .submit-btn::before,
  .otp-btn::before,
  .btn-outline::before {
    display: none;
  }
  
  .send-otp-btn:hover,
  .submit-btn:hover,
  .otp-btn:hover {
    transform: none !important;
  }
}

/* ============================================
   ACCESSIBILITY ENHANCEMENTS - PREMIUM
   ============================================ */
.form-control:focus-visible {
  outline: 2px solid var(--register-primary);
  outline-offset: 2px;
}

.submit-btn:focus-visible,
.send-otp-btn:focus-visible,
.otp-btn:focus-visible,
.btn-outline:focus-visible {
  outline: 2px solid var(--register-primary);
  outline-offset: 2px;
}

@media (prefers-contrast: high) {
  .form-control {
    border-width: 3px;
  }
  
  .form-control:focus {
    outline: 3px solid var(--register-primary);
    outline-offset: 2px;
  }
  
  .submit-btn,
  .send-otp-btn,
  .otp-btn {
    outline: 2px solid white;
    outline-offset: 2px;
  }
  
  .btn-outline {
    border-width: 3px;
  }
  
  .requirement.valid {
    outline: 1px solid var(--register-success);
  }
  
  .requirement.invalid {
    outline: 1px solid var(--register-error);
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .registration-wrapper {
    min-height: auto;
    padding: 10px !important;
    background: white !important;
  }
  
  .registration-wrapper::before,
  .registration-wrapper::after {
    display: none !important;
  }
  
  .registration-container {
    box-shadow: none !important;
    border: 1px solid #e5e7eb !important;
    background: white !important;
    backdrop-filter: none !important;
    padding: 20px !important;
  }
  
  .registration-container::before,
  .registration-container::after {
    display: none !important;
  }
  
  .registration-header h2 {
    -webkit-text-fill-color: #111827 !important;
    color: #111827 !important;
    background: none !important;
  }
  
  .registration-header h2::after {
    display: none !important;
  }
  
  .logo-image {
    filter: none !important;
    animation: none !important;
  }
  
  .submit-btn,
  .send-otp-btn,
  .otp-btn,
  .btn-outline,
  .password-toggle {
    display: none !important;
  }
  
  .registration-progress {
    display: none !important;
  }
  
  .form-section {
    display: block !important;
  }
  
  .otp-section {
    display: block !important;
  }
  
  .form-control {
    border: 1px solid #d1d5db !important;
    background: white !important;
  }
  
  .login-redirect {
    display: none !important;
  }
  
  .alert {
    display: none !important;
  }
  
  .password-strength {
    display: none !important;
  }
  
  .verification-status {
    display: none !important;
  }
  
  .field-error,
  .username-feedback {
    display: none !important;
  }
  
  .login-redirect::before {
    display: none !important;
  }
}

/* ============================================
   END OF REGISTER.CSS
   ============================================ */