:root {
  --color-primary: #024050;
  --color-primary-hover: #036075;
  --color-success: #225522;
  --color-success-light: #e8f5e9;
  --color-error: #e74c3c;
  --color-error-light: #ffebee;
  --color-warning: #f39c12;
  --color-warning-light: #fff3cd;
  --color-info: #3498db;
  --color-info-light: #e3f2fd;
  --color-text: #2d3748;
  --color-text-light: #718096;
  --color-border: #e2e8f0;
  --color-bg: #f8fafc;
  --color-bg-light: #ffffff;
  --color-bg-hover: #f1f7fa;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --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);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
}

.registration-container {
  min-height: calc(100vh - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  position: relative;
  overflow: hidden;
}

.registration-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(173, 255, 47, 0.1) 0%, transparent 55%),
    radial-gradient(circle at 85% 30%, rgba(2, 64, 80, 0.08) 0%, transparent 55%);
  pointer-events: none;
}

.registration-card {
  background: var(--color-bg-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 48px;
  width: 100%;
  max-width: 520px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(2, 64, 80, 0.1);
  z-index: 1;
}

.registration-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), #adff2f);
  z-index: 2;
}

.registration-title {
  color: var(--color-primary);
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  margin-bottom: 40px !important;
  position: relative;
  padding-bottom: 20px;
}

.registration-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), #adff2f);
  border-radius: 2px;
}

.registration-form {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 4px;
}

.form-label::after {
  content: '*';
  color: var(--color-error);
  font-size: 14px;
  opacity: 0.8;
}

.form-input {
  padding: 16px 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg);
  transition: all var(--transition-base);
  outline: none;
  position: relative;
}

.form-input::placeholder {
  color: var(--color-text-light);
  opacity: 0.6;
}

.form-input:focus {
  border-color: var(--color-primary);
  background: var(--color-bg-light);
  box-shadow: 0 0 0 3px rgba(2, 64, 80, 0.1);
  transform: translateY(-1px);
}

.form-input:focus::placeholder {
  opacity: 0.3;
}

.form-input:hover:not(:focus) {
  border-color: rgba(2, 64, 80, 0.3);
  background: var(--color-bg-hover);
}

.form-hint {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.4;
  margin-top: 4px;
}

.input-hidden {
  position: absolute !important;
  left: -9999px !important;
  width: 1px !important;
  height: 1px !important;
  opacity: 0 !important;
  pointer-events: none !important;
}

.password-strength {
  margin-top: 12px;
  padding: 16px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.strength-bar {
  width: 100%;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}

.strength-bar-progress {
  height: 100%;
  width: 0%;
  border-radius: 3px;
  transition: all var(--transition-base);
  background: linear-gradient(90deg, #e74c3c, #f39c12, #3498db, #27ae60, #225522);
}

.strength-text {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

#strengthText {
  font-weight: 600;
  font-size: 14px;
}

.password-requirements {
  margin-top: 16px;
  padding: 20px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.password-requirements p {
  margin: 0 0 12px 0;
  font-size: 14px;
  color: var(--color-text);
}

.requirements-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.requirements-list li {
  font-size: 13px;
  color: var(--color-text-light);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color var(--transition-base);
}

.requirements-list li::before {
  content: '○';
  font-size: 8px;
  transition: all var(--transition-base);
}

.requirements-list li.valid {
  color: var(--color-success);
}

.requirements-list li.valid::before {
  content: '✓';
  font-size: 12px;
  font-weight: bold;
  color: var(--color-success);
}

.password-match {
  font-size: 14px;
  font-weight: 500;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  margin-top: 8px;
  display: none;
  align-items: center;
  gap: 8px;
  animation: slideIn var(--transition-base);
}

.password-match::before {
  font-size: 16px;
}

.password-match.match {
  display: flex;
  background: var(--color-success-light);
  color: var(--color-success);
  border: 1px solid rgba(34, 85, 34, 0.2);
}

.password-match.mismatch {
  display: flex;
  background: var(--color-error-light);
  color: var(--color-error);
  border: 1px solid rgba(231, 76, 60, 0.2);
}

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

.agreement-section {
  margin-top: 20px;
  padding: 24px;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

.agreement-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 8px 0;
}

.agreement-subtitle {
  font-size: 14px;
  color: var(--color-text-light);
  margin: 0 0 20px 0;
  line-height: 1.5;
}

.checkbox-group {
  margin-bottom: 16px;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
}

.checkbox-label:hover {
  background: rgba(2, 64, 80, 0.03);
  transform: translateX(4px);
}

.required-checkbox {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-custom {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-bg-light);
  position: relative;
  flex-shrink: 0;
  margin-top: 2px;
  transition: all var(--transition-base);
}

.checkbox-custom::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 10px;
  height: 10px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition-base);
}

.required-checkbox:checked + .checkbox-custom {
  border-color: var(--color-primary);
  background: rgba(2, 64, 80, 0.1);
}

.required-checkbox:checked + .checkbox-custom::after {
  transform: translate(-50%, -50%) scale(1);
}

.checkbox-text {
  flex: 1;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
}

.agreement-link {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition-base);
  position: relative;
}

.agreement-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.agreement-link:hover {
  color: #036075;
}

.agreement-link:hover::after {
  transform: scaleX(1);
}

.checkbox-error {
  font-size: 12px;
  color: var(--color-error);
  margin-top: 4px;
  padding-left: 32px;
  min-height: 18px;
  animation: fadeIn var(--transition-base);
}

.checkbox-group.error .checkbox-custom {
  border-color: var(--color-error);
  animation: shake 0.5s ease;
}

.agreement-error {
  font-size: 14px;
  color: var(--color-error);
  padding: 12px 16px;
  background: var(--color-error-light);
  border-radius: var(--radius-md);
  border: 1px solid rgba(231, 76, 60, 0.2);
  margin-top: 16px;
  display: none;
  animation: slideIn var(--transition-base);
}

.agreement-error.show {
  display: block;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.submit-button {
  width: 100%;
  padding: 18px 32px;
  background: linear-gradient(135deg, var(--color-primary), #036075);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(2, 64, 80, 0.2);
}

.submit-button::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 0.5s ease;
}

.submit-button:hover {
  background: linear-gradient(135deg, #036075, #04758f);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(2, 64, 80, 0.3);
}

.submit-button:hover::before {
  left: 100%;
}

.submit-button:active {
  transform: translateY(0);
  box-shadow: 0 2px 10px rgba(2, 64, 80, 0.2);
}

.button-text {
  position: relative;
  z-index: 1;
}

.button-icon {
  font-size: 20px;
  font-weight: 300;
  transform: translateX(0);
  transition: transform var(--transition-base);
  position: relative;
  z-index: 1;
}

.submit-button:hover .button-icon {
  transform: translateX(4px);
}

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

.notice {
  max-width: 520px;
  margin: 20px auto;
  padding: 16px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  animation: slideIn var(--transition-base);
  display: flex;
  align-items: center;
  gap: 12px;
}

.notice::before {
  font-size: 18px;
}

.notice-error {
  background: var(--color-error-light);
  color: var(--color-error);
  border: 1px solid rgba(231, 76, 60, 0.3);
}

.notice-success {
  background: var(--color-success-light);
  color: var(--color-success);
  border: 1px solid rgba(34, 85, 34, 0.3);
}

@media (max-width: 768px) {
  .registration-container {
    padding: 20px 16px;
    min-height: calc(100vh - 140px);
  }
  
  .registration-card {
    padding: 32px 24px;
    border-radius: var(--radius-lg);
  }
  
  .registration-title {
    font-size: 26px;
    margin-bottom: 32px !important;
  }
  
  .form-input {
    padding: 14px 16px;
    font-size: 15px;
  }
  
  .password-requirements {
    padding: 16px;
  }
  
  .agreement-section {
    padding: 20px;
  }
  
  .submit-button {
    padding: 16px 24px;
  }
}

@media (max-width: 480px) {
  .registration-card {
    padding: 24px 20px;
    border-radius: var(--radius-md);
  }
  
  .registration-title {
    font-size: 22px;
    margin-bottom: 24px !important;
  }
  
  .registration-form {
    gap: 20px;
  }
  
  .form-input {
    padding: 12px 14px;
    font-size: 14px;
  }
  
  .checkbox-label {
    padding: 10px 12px;
  }
  
  .checkbox-text {
    font-size: 13px;
  }
  
  .submit-button {
    padding: 14px 20px;
    font-size: 15px;
  }
}