:root {
  --primary-red: #dc2626;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --text-accent: #fbbf24;
  --bg-primary: #0b0b0f;
  --bg-secondary: #1a1b23;
  --gradient-card: linear-gradient(145deg, rgba(26, 27, 35, 0.8), rgba(15, 16, 23, 0.9));
  --gradient-fire: linear-gradient(135deg, #dc2626, #f97316, #fbbf24);
  --radius-sm: 0.375rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --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);
}

.auth-background {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: radial-gradient(ellipse at top right, rgba(245, 158, 11, 0.15), transparent 50%),
              radial-gradient(ellipse at bottom left, rgba(220, 38, 38, 0.1), transparent 50%);
  overflow-y: auto;
}

.bg-gradient-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,11,15,.7), rgba(11,11,15,.9));
}

.floating-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: rgba(245,158,11,.4);
  border-radius: 50%;
  animation: float-up linear infinite;
}

@keyframes float-up {
  0% {
    transform: translateY(100vh) translateX(0) scale(0);
    opacity: 0;
  }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% {
    transform: translateY(-10vh) translateX(-20px) scale(1);
    opacity: 0;
  }
}

.auth-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 2rem 0 4rem 0;
  position: relative;
  z-index: 1;
}

.auth-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

@media (min-width: 1024px) {
  .auth-layout {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
  }
}

.auth-form-container {
  background: var(--gradient-card);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-xl);
  padding: 2rem;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 40px rgba(0,0,0,.3);
  position: relative;
  overflow: hidden;
}

.auth-form-container::before {
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:3px;
  background: var(--gradient-fire);
}

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

.auth-brand {
  display:flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  margin-bottom:1rem;
}

.brand-icon {
  font-size:2rem;
  filter: drop-shadow(0 0 10px rgba(245,158,11,.5));
}

.brand-text {
  font-size:1.5rem;
  font-weight:800;
  background:var(--gradient-fire);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}

.auth-title {
  font-size:2rem;
  font-weight:700;
  color:var(--text-primary);
  margin-bottom:.5rem;
}

.auth-subtitle {
  color:var(--text-secondary);
  font-size:1rem;
}

.progress-indicator {
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:2rem;
  position:relative;
}

.progress-step {
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:.5rem;
  position:relative;
  z-index:2;
}

.step-circle {
  width:40px;
  height:40px;
  border-radius:50%;
  background:rgba(255,255,255,.1);
  border:2px solid rgba(255,255,255,.3);
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  color:var(--text-muted);
  transition: var(--transition-base);
}

.progress-step.active .step-circle {
  background:var(--gradient-fire);
  border-color:var(--primary-red);
  color:#fff;
  box-shadow:0 0 20px rgba(220,38,38,.4);
}

.step-label {
  font-size:.75rem;
  font-weight:600;
  color:var(--text-muted);
  text-transform:uppercase;
  letter-spacing:.05em;
}

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

.progress-line {
  position:absolute;
  top:20px;
  left:50%;
  transform:translateX(-50%);
  width:100px;
  height:2px;
  background:rgba(255,255,255,.2);
  z-index:1;
}

.progress-fill {
  height:100%;
  width:0%;
  background:var(--gradient-fire);
  transition: width .5s ease;
}

.form-step {
  display:none;
}

.form-step.active {
  display:block;
  animation: fade-in-up .6s ease-out;
}

@keyframes fade-in-up {
  from {
    opacity:0;
    transform: translateY(20px);
  }
  to {
    opacity:1;
    transform: translateY(0);
  }
}

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

.form-group {
  display:flex;
  flex-direction:column;
  gap:.5rem;
  margin-bottom:1.5rem;
}

.form-label {
  display:flex;
  align-items:center;
  gap:.5rem;
  color:var(--text-primary);
  font-weight:600;
  font-size:.875rem;
}

.label-required {
  color:var(--primary-red);
  font-size:1rem;
}

.input-wrapper {
  position:relative;
}

.form-input {
  width:100%;
  padding:1rem;
  background:rgba(255,255,255,.04);
  border:2px solid rgba(255,255,255,.1);
  border-radius:var(--radius-lg);
  color:var(--text-primary);
  font-size:1rem;
  transition: var(--transition-base);
  box-sizing: border-box;
}

.form-input::placeholder {
  color:var(--text-muted);
}

.form-input:focus {
  outline:none;
  border-color: rgba(245,158,11,.5);
  background: rgba(255,255,255,.06);
  transform: translateY(-1px);
}

.form-input.valid {
  border-color: rgba(34,197,94,.5);
}

.form-input.invalid {
  border-color: rgba(239,68,68,.5);
}

.input-focus-border {
  position:absolute;
  bottom:0;
  left:0;
  width:0;
  height:2px;
  background:var(--gradient-fire);
  border-radius:0 0 var(--radius-lg) var(--radius-lg);
  transition: width var(--transition-base);
}

.form-input:focus + .password-toggle + .input-focus-border,
.form-input:focus + .input-validation + .input-focus-border,
.form-input:focus + .input-focus-border {
  width:100%;
}

.input-validation {
  position:absolute;
  right:1rem;
  top:50%;
  transform:translateY(-50%);
  font-size:1.25rem;
  z-index:2;
}

.input-validation.valid {
  color:#22c55e;
}

.input-validation.invalid {
  color:#ef4444;
}

.input-hint {
  font-size:.75rem;
  color:var(--text-muted);
  margin-top:.25rem;
}

.password-toggle {
  position:absolute;
  right:1rem;
  top:50%;
  transform:translateY(-50%);
  background:none;
  border:none;
  color:var(--text-muted);
  cursor:pointer;
  padding:.5rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
  z-index:2;
}

.password-toggle:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,.1);
}

.password-strength {
  margin-top:1rem;
  padding:1rem;
  background:rgba(255,255,255,.03);
  border-radius: var(--radius-lg);
  border:1px solid rgba(255,255,255,.08);
}

.strength-bar {
  width:100%;
  height:4px;
  background:rgba(255,255,255,.1);
  border-radius: var(--radius-full);
  overflow:hidden;
  margin-bottom:.5rem;
}

.strength-fill {
  height:100%;
  width:0%;
  background: var(--gradient-fire);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

.strength-text {
  font-size:.75rem;
  font-weight:600;
  color:var(--text-muted);
  margin-bottom:.75rem;
  text-transform:uppercase;
  letter-spacing:.05em;
}

.strength-requirements {
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:.5rem;
}

.requirement {
  display:flex;
  align-items:center;
  gap:.5rem;
  font-size:.75rem;
}

.req-icon {
  color: var(--text-muted);
  font-weight:bold;
}

.requirement.met .req-icon {
  color:#22c55e;
}

.requirement.met .req-text {
  color: var(--text-secondary);
}

.req-text {
  color: var(--text-muted);
}

.step-button {
  position:relative;
  padding:1rem;
  background: var(--gradient-fire);
  border:none;
  border-radius: var(--radius-lg);
  color:#fff;
  font-weight:700;
  font-size:1rem;
  cursor:pointer;
  transition: var(--transition-base);
  overflow:hidden;
  width:100%;
  margin-top:1rem;
}

.step-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(245,158,11,.4);
}

.step-button:disabled {
  opacity:.5;
  cursor:not-allowed;
  transform:none;
}

.step-button.btn-ghost {
  background: rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.1);
  color: var(--text-primary);
}

.step-button.btn-ghost:hover {
  background: rgba(255,255,255,.08);
  box-shadow: 0 5px 15px rgba(0,0,0,.2);
}

.btn-content {
  display:flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
}

.btn-loading {
  position:absolute;
  inset:0;
  display:none;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  background: var(--gradient-fire);
}

.loading-spinner {
  width:20px;
  height:20px;
  border:2px solid rgba(255,255,255,.3);
  border-top-color:#fff;
  border-radius:50%;
  animation: spin 1s linear infinite;
}

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

.verification-section {
  text-align:center;
  margin-bottom:2rem;
}

.verification-icon {
  font-size:3rem;
  margin-bottom:1rem;
  filter: drop-shadow(0 0 10px rgba(245,158,11,.5));
}

.verification-title {
  font-size:1.5rem;
  font-weight:700;
  color:var(--text-primary);
  margin-bottom:.5rem;
}

.verification-text {
  color: var(--text-secondary);
  line-height:1.6;
}

.data-summary {
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding:1rem;
  margin-bottom:2rem;
}

.summary-item {
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:.5rem 0;
  border-bottom:1px solid rgba(255,255,255,.05);
}

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

.summary-label {
  color: var(--text-muted);
  font-weight:600;
  font-size:.875rem;
}

.summary-value {
  color: var(--text-primary);
  font-weight:500;
}

.terms-section {
  margin-bottom:2rem;
}

.checkbox-wrapper {
  display:flex;
  align-items:flex-start;
  gap:.75rem;
  cursor:pointer;
  user-select:none;
  margin-bottom:1rem;
}

.checkbox-wrapper:last-child {
  margin-bottom:0;
}

.checkbox-input {
  position:absolute;
  opacity:0;
}

.checkbox-custom {
  width:18px;
  height:18px;
  border:2px solid rgba(255,255,255,.3);
  border-radius: var(--radius-sm);
  background:transparent;
  transition: var(--transition-base);
  position:relative;
  flex-shrink:0;
  margin-top:2px;
}

.checkbox-input:checked + .checkbox-custom {
  background: var(--gradient-fire);
  border-color: var(--primary-red);
}

.checkbox-input:checked + .checkbox-custom::after {
  content:"✓";
  position:absolute;
  top:50%;
  left:50%;
  transform: translate(-50%,-50%);
  color:#fff;
  font-weight:bold;
  font-size:.75rem;
}

.checkbox-label {
  color: var(--text-secondary);
  font-size:.875rem;
  line-height:1.5;
}

.terms-link {
  color: var(--primary-red);
  text-decoration: underline;
  font-weight:600;
  transition: color var(--transition-base);
}

.terms-link:hover {
  color:#f97316;
}

.step-actions {
  display:flex;
  gap:1rem;
  margin-top:2rem;
}

.auth-info-container {
  display:none;
  flex-direction:column;
  justify-content:center;
  padding:2rem;
}

@media (min-width:1024px) {
  .auth-info-container {
    display:flex;
  }
}

.info-content {
  text-align:center;
}

.info-badge {
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.5rem 1rem;
  background: rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size:.875rem;
  font-weight:600;
  margin-bottom:2rem;
}

.info-title {
  font-size:2.5rem;
  font-weight:800;
  color:var(--text-primary);
  margin-bottom:1rem;
  line-height:1.2;
}

.info-description {
  color: var(--text-secondary);
  font-size:1.125rem;
  line-height:1.6;
  margin-bottom:2rem;
  max-width:500px;
  margin-inline:auto;
}

.info-features {
  display:flex;
  flex-direction:column;
  gap:1rem;
  margin-bottom:2rem;
  text-align:left;
}

.feature-item {
  display:flex;
  gap:1rem;
  padding:1rem;
  background: rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  transition: var(--transition-base);
}

.feature-item:hover {
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.15);
  transform: translateY(-2px);
}

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

.feature-title {
  font-size:1rem;
  font-weight:700;
  color: var(--text-primary);
  margin-bottom:.25rem;
}

.feature-desc {
  color: var(--text-secondary);
  font-size:.875rem;
  line-height:1.4;
}

.testimonial-preview {
  background: rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg);
  padding:1.5rem;
  text-align:left;
}

.testimonial-stars {
  font-size:1rem;
  margin-bottom:.75rem;
}

.testimonial-text {
  color: var(--text-secondary);
  font-style: italic;
  line-height:1.6;
  margin-bottom:1rem;
}

.testimonial-author {
  display:flex;
  align-items:center;
  gap:.75rem;
}

.author-avatar {
  width:40px;
  height:40px;
  border-radius:50%;
  background: var(--gradient-fire);
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
  color:#fff;
  font-size:.875rem;
}

.author-name {
  font-size:.875rem;
  font-weight:600;
  color: var(--text-primary);
  margin:0;
}

.author-title {
  font-size:.75rem;
  color: var(--text-muted);
  margin:0;
}

.auth-footer {
  text-align:center;
  margin-top:1.5rem;
}

.auth-footer-text {
  color: var(--text-secondary);
  font-size:.875rem;
}

.auth-link {
  color: var(--primary-red);
  font-weight:600;
  transition: color var(--transition-base);
}

.auth-link:hover {
  color:#f97316;
}

.auth-notifications {
  position:fixed;
  top:2rem;
  right:2rem;
  z-index:1000;
  max-width:400px;
}

.notification {
  display:flex;
  align-items:center;
  gap:.75rem;
  padding:1rem;
  background: var(--bg-secondary);
  border:1px solid rgba(239,68,68,.3);
  border-radius: var(--radius-lg);
  box-shadow: 0 10px 30px rgba(0,0,0,.3);
  margin-bottom:.75rem;
  animation: slide-in-right .5s ease-out;
}

.notification.error {
  border-color: rgba(239,68,68,.4);
  background: rgba(239,68,68,.05);
}

.notification-icon {
  font-size:1.25rem;
  flex-shrink:0;
}

.notification-text {
  color: var(--text-primary);
  font-weight:500;
  flex:1;
}

.notification-close {
  background:none;
  border:none;
  color: var(--text-muted);
  cursor:pointer;
  font-size:1.25rem;
  padding:.25rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.notification-close:hover {
  background: rgba(255,255,255,.1);
  color: var(--text-primary);
}

@keyframes slide-in-right {
  from {
    opacity:0;
    transform: translateX(100%);
  }
  to {
    opacity:1;
    transform: translateX(0);
  }
}

@keyframes shake {
  0%,100%{transform:translateX(0)}
  10%,30%,50%,70%,90%{transform:translateX(-3px)}
  20%,40%,60%,80%{transform:translateX(3px)}
}

/* Enhanced responsive for complex form */
@media (max-width: 1200px) {
  .auth-layout {
    gap: 3rem;
  }
  
  .info-features {
    gap: 0.875rem;
  }
}

@media (max-width: 1024px) {
  .floating-particles .particle {
    width: 2px;
    height: 2px;
  }
  
  .progress-line {
    width: 90px;
  }
}

@media (max-width: 768px) {
  .auth-section {
    padding: 1.5rem 0;
  }
  
  .auth-form-container {
    padding: 1.5rem;
  }
  
  .auth-title {
    font-size: 1.75rem;
  }
  
  .info-title {
    font-size: 2rem;
  }
  
  .step-actions {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .strength-requirements {
    grid-template-columns: 1fr;
    gap: 0.375rem;
  }
  
  .progress-line {
    width: 80px;
  }
  
  .auth-notifications {
    right: 1rem;
    left: 1rem;
    max-width: none;
  }
  
  .feature-item {
    padding: 0.875rem;
  }
  
  .testimonial-preview {
    padding: 1.25rem;
  }
}

@media (max-width: 640px) {
  .auth-brand {
    gap: 0.375rem;
  }
  
  .brand-text {
    font-size: 1.25rem;
  }
  
  .progress-indicator {
    margin-bottom: 1.5rem;
  }
  
  .form-input {
    padding: 0.875rem;
    font-size: 0.9rem;
  }
  
  .checkbox-wrapper {
    gap: 0.625rem;
  }
  
  .data-summary {
    padding: 0.875rem;
  }
}

@media (max-width: 480px) {
  .auth-form-container {
    padding: 1rem;
  }
  
  .progress-indicator {
    transform: scale(0.9);
    margin-bottom: 1.25rem;
  }
  
  .step-circle {
    width: 36px;
    height: 36px;
    font-size: 0.875rem;
  }
  
  .step-label {
    font-size: 0.7rem;
  }
  
  .form-group {
    margin-bottom: 1.25rem;
  }
  
  .password-strength {
    padding: 0.875rem;
  }
  
  .verification-icon {
    font-size: 2.5rem;
  }
  
  .verification-title {
    font-size: 1.25rem;
  }
  
  .testimonial-preview {
    padding: 1rem;
  }
  
  .author-avatar {
    width: 36px;
    height: 36px;
    font-size: 0.8rem;
  }
}

@media (max-width: 360px) {
  .auth-form-container {
    padding: 0.75rem;
  }
  
  .progress-line {
    width: 60px;
  }
  
  .form-input {
    padding: 0.75rem;
  }
  
  .password-toggle {
    right: 0.75rem;
    padding: 0.375rem;
  }
  
  .step-button {
    padding: 0.875rem;
    font-size: 0.9rem;
  }
  
  .requirement {
    font-size: 0.7rem;
  }
  
  .checkbox-label {
    font-size: 0.8rem;
  }
  
  .floating-particles {
    display: none; /* Performance on very small screens */
  }
}