:root {
  --primary: #7c5ce6;
  --primary-dark: #6a4fd4;
  --primary-light: #9d85f0;
  --secondary: #1a1a2e;
  --bg-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-border: rgba(255, 255, 255, 0.08);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

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

body {
  font-family: "Poppins", sans-serif;
  background: var(--bg-gradient);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  color: var(--text-primary);
}

.signup-container {
  width: 100%;
  max-width: 700px;
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--card-border);
  border-radius: 24px;
  padding: 40px;
  box-shadow: var(--shadow-lg);
}

.logo-container {
  text-align: center;
  margin-bottom: 30px;
}

.logo-container img {
  height: 50px;
}

.logo-container h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 15px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-container p {
  color: var(--text-secondary);
  margin-top: 8px;
  font-size: 0.95rem;
}

/* Progress Steps */
.progress-container {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  position: relative;
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  max-width: 120px;
  position: relative;
}

.step-circle {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 2px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--text-muted);
  transition: all 0.3s ease;
  position: relative;
  z-index: 2;
}

.step-circle i {
  font-size: 1rem;
}

.progress-step.active .step-circle {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  box-shadow: 0 0 20px rgba(124, 92, 230, 0.4);
}

.progress-step.completed .step-circle {
  background: var(--success);
  border-color: var(--success);
  color: white;
}

.step-label {
  margin-top: 10px;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  transition: color 0.3s ease;
}

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

.progress-line {
  position: absolute;
  top: 22px;
  left: calc(50% + 30px);
  right: calc(-50% + 30px);
  height: 2px;
  background: var(--card-border);
  z-index: 1;
}

.progress-step:last-child .progress-line {
  display: none;
}

.progress-step.completed .progress-line {
  background: var(--success);
}

/* Form Steps */
.form-step {
  display: none;
  animation: fadeIn 0.4s ease;
}

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

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

.step-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 8px;
  text-align: center;
}

.step-subtitle {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 30px;
  font-size: 0.95rem;
}

/* Form Groups */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 600px) {
  .form-row {
    grid-template-columns: 1fr;
  }
}

.form-group {
  margin-bottom: 24px;
}

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

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group label .required {
  color: var(--danger);
  margin-left: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(124, 92, 230, 0.1);
  box-shadow: 0 0 0 4px rgba(124, 92, 230, 0.15);
}

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

.form-group select {
  cursor: pointer;
}

.form-group select option {
  background: var(--secondary);
}

.form-group textarea {
  min-height: 100px;
  resize: vertical;
}

.form-group .input-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.form-group.has-error input,
.form-group.has-error select {
  border-color: var(--danger);
}

.form-group .error-text {
  color: var(--danger);
  font-size: 0.8rem;
  margin-top: 6px;
  display: none;
}

.form-group.has-error .error-text {
  display: block;
}

/* Checkbox & Radio */
.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
  width: 20px;
  height: 20px;
  min-width: 20px;
  margin-top: 3px;
  accent-color: var(--primary);
  cursor: pointer;
}

.checkbox-group label {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.checkbox-group a {
  color: var(--primary);
  text-decoration: none;
}

.checkbox-group a:hover {
  text-decoration: underline;
}

/* Buttons */
.btn-row {
  display: flex;
  gap: 16px;
  margin-top: 30px;
}

.btn {
  flex: 1;
  padding: 16px 24px;
  border: none;
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(124, 92, 230, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
  border: 1px solid var(--card-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-primary);
}

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

.btn .spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Alert Messages */
.alert {
  padding: 16px 20px;
  border-radius: 12px;
  margin-bottom: 24px;
  display: none;
}

.alert.visible {
  display: flex;
  align-items: center;
  gap: 12px;
  animation: fadeIn 0.3s ease;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #6ee7b7;
}

/* OTP Input */
.otp-container {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: 30px 0;
}

.otp-input {
  width: 55px;
  height: 65px;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid var(--card-border);
  border-radius: 12px;
  color: var(--text-primary);
  transition: all 0.3s ease;
}

.otp-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(124, 92, 230, 0.15);
}

.otp-input.filled {
  border-color: var(--success);
  background: rgba(16, 185, 129, 0.1);
}

.resend-link {
  text-align: center;
  margin-top: 20px;
}

.resend-link button {
  background: none;
  border: none;
  color: var(--primary);
  font-family: inherit;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: underline;
}

.resend-link button:disabled {
  color: var(--text-muted);
  cursor: not-allowed;
  text-decoration: none;
}

/* Success Step */
.success-icon {
  width: 100px;
  height: 100px;
  margin: 0 auto 30px;
  background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: successPop 0.5s ease;
}

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

.success-icon i {
  font-size: 3rem;
  color: white;
}

.features-list {
  margin: 30px 0;
  padding: 0;
  list-style: none;
}

.features-list li {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 12px 0;
  border-bottom: 1px solid var(--card-border);
  color: var(--text-secondary);
}

.features-list li:last-child {
  border-bottom: none;
}

.features-list li i {
  color: var(--primary);
  font-size: 1.2rem;
  width: 24px;
}

/* Login Link */
.login-link {
  text-align: center;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--card-border);
}

.login-link a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.login-link a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 600px) {
  .signup-container {
    padding: 24px;
    border-radius: 16px;
  }

  .progress-container {
    gap: 8px;
  }

  .step-circle {
    width: 36px;
    height: 36px;
    font-size: 0.85rem;
  }

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

  .otp-input {
    width: 45px;
    height: 55px;
    font-size: 1.2rem;
  }

  .btn-row {
    flex-direction: column;
  }
}