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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.register-container {
    width: 100%;
    max-width: 500px;
}

.register-box {
    background: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

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

.header h2 {
    color: #2c3e50;
    font-size: 2.2rem;
    margin-bottom: 8px;
    font-weight: 600;
}

.header p {
    color: #7f8c8d;
    font-size: 1rem;
}

.form-row {
    margin-bottom: 20px;
}

.input-group {
    position: relative;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #2c3e50;
    font-size: 0.95rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"] {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background-color: #f8f9fa;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: #667eea;
    background-color: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

input.error {
    border-color: #e74c3c;
    background-color: #fdf2f2;
}

input.success {
    border-color: #27ae60;
    background-color: #f2fdf2;
}

.error {
    color: #e74c3c;
    font-size: 0.85rem;
    margin-top: 5px;
    display: block;
    min-height: 20px;
}

.password-requirements {
    margin-top: 5px;
}

.password-requirements small {
    color: #7f8c8d;
    font-size: 0.8rem;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 2px;
    transform: scale(1.2);
}

.checkbox-group label {
    margin-bottom: 0;
    font-size: 0.9rem;
    line-height: 1.4;
}

.checkbox-group a {
    color: #667eea;
    text-decoration: none;
}

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

.form-actions {
    margin-top: 30px;
}

.register-btn {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.register-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.register-btn:active {
    transform: translateY(0);
}

.register-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.login-link {
    text-align: center;
    margin-top: 25px;
    padding-top: 20px;
    border-top: 1px solid #e1e8ed;
}

.login-link p {
    color: #7f8c8d;
    font-size: 0.95rem;
}

.login-link a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

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

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: white;
    margin: 15% auto;
    padding: 30px;
    border-radius: 10px;
    width: 90%;
    max-width: 400px;
    text-align: center;
    position: relative;
}

.close {
    position: absolute;
    right: 15px;
    top: 15px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: #aaa;
}

.close:hover {
    color: #000;
}

/* Responsive Design */
@media (max-width: 600px) {
    .register-box {
        padding: 30px 20px;
        margin: 10px;
    }
    
    .header h2 {
        font-size: 1.8rem;
    }
    
    input[type="text"],
    input[type="email"],
    input[type="tel"],
    input[type="password"] {
        padding: 12px 14px;
    }
    
    .register-btn {
        padding: 14px;
        font-size: 1rem;
    }
}

/* Loading Animation */
.loading {
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translateY(-50%) rotate(0deg); }
    100% { transform: translateY(-50%) rotate(360deg); }
}

/* Modal Message Styles */
.success-message {
    color: #27ae60;
}

.success-message h3 {
    color: #27ae60;
    margin-bottom: 15px;
}

.success-message a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.success-message a:hover {
    text-decoration: underline;
}

.error-message {
    color: #e74c3c;
}

.error-message h3 {
    color: #e74c3c;
    margin-bottom: 15px;
}