.register-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 2rem;
  padding-top: 6rem;
}

.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: var(--glass-bg);
  border-bottom: 1px solid var(--glass-border);
  backdrop-filter: blur(20px);
  z-index: 100;
  padding: 1rem 2rem;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.1rem;
}

.nav-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent-gradient);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.nav-logo-icon::after {
  content: '⚡';
  font-size: 0.9rem;
  color: white;
}

.nav-back {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-back:hover {
  color: var(--text-primary);
}

.register-panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  padding: 3rem;
  backdrop-filter: blur(20px);
  box-shadow: 0 24px 48px var(--shadow-light);
  max-width: 600px;
  width: 100%;
  animation: slideUp 0.8s ease-out;
  position: relative;
  overflow: hidden;
}

.register-header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.register-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.5rem;
}

.register-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.5;
}

.register-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.form-group input,
.form-group select {
  padding: 0.875rem 1rem;
  border: 2px solid var(--glass-border);
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  background: var(--glass-bg);
  color: var(--text-primary);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent-gradient);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  background: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group select:focus {
  background: rgba(15, 23, 42, 0.8);
}

.form-group input::placeholder {
  color: var(--text-secondary);
  opacity: 0.7;
}

.password-strength {
  margin-top: 0.5rem;
}

.strength-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: block;
  margin-bottom: 0.25rem;
}

.strength-bar {
  width: 100%;
  height: 4px;
  background: var(--glass-border);
  border-radius: 2px;
  overflow: hidden;
}

.strength-fill {
  height: 100%;
  background: linear-gradient(90deg, #ef4444, #f59e0b, #10b981);
  width: 0%;
  transition: width 0.3s ease;
  border-radius: 2px;
}

.password-match {
  font-size: 0.85rem;
  margin-top: 0.25rem;
  min-height: 1.2rem;
}

.match-success {
  color: #10b981;
}

.match-error {
  color: #ef4444;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkmark {
  width: 20px;
  height: 20px;
  border: 2px solid;
  border-radius: 4px;
  background: var(--glass-bg);
  position: relative;
  transition: all 0.3s ease;
  flex-shrink: 0;
  margin-top: 1px;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
  background: var(--accent-gradient);
  border-color: transparent;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: white;
  font-size: 0.75rem;
  font-weight: bold;
}

.link {
  color: var(--text-primary);
  text-decoration: underline;
  font-weight: 500;
  transition: opacity 0.3s ease;
}

.link:hover {
  opacity: 0.8;
}

.submit-btn {
  margin-top: 1rem;
  width: 100%;
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

.form-footer {
  text-align: center;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--glass-border);
}

.form-footer p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Validation states */
.form-group.error input,
.form-group.error select {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group.success input,
.form-group.success select {
  border-color: #10b981;
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.error-message {
  color: #ef4444;
  font-size: 0.8rem;
  margin-top: 0.25rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .register-panel {
    padding: 2rem 1.5rem;
    margin: 1rem;
  }
  
  .register-header h1 {
    font-size: 2rem;
  }
  
  .nav-content {
    padding: 0 1rem;
  }
}

@media (max-width: 480px) {
  .register-container {
    padding: 1rem;
    padding-top: 5rem;
  }
  
  .register-panel {
    padding: 2rem 1rem;
    border-radius: 16px;
  }
  
  .nav-bar {
    padding: 0.75rem 1rem;
  }
  
  .nav-logo span {
    display: none;
  }
}

/* Loading state */
.submit-btn.loading {
  opacity: 0.7;
  cursor: not-allowed;
}

.submit-btn.loading span::after {
  content: '...';
  animation: dots 1.5s steps(5, end) infinite;
}

@keyframes dots {
  0%, 20% {
    color: rgba(0,0,0,0);
    text-shadow:
      .25em 0 0 rgba(0,0,0,0),
      .5em 0 0 rgba(0,0,0,0);
  }
  40% {
    color: white;
    text-shadow:
      .25em 0 0 rgba(0,0,0,0),
      .5em 0 0 rgba(0,0,0,0);
  }
  60% {
    text-shadow:
      .25em 0 0 white,
      .5em 0 0 rgba(0,0,0,0);
  }
  80%, 100% {
    text-shadow:
      .25em 0 0 white,
      .5em 0 0 white;
  }
}