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

:root {
    --primary-color: #87BCD4;
    --primary-dark: #6ba3c0;
    --white: #ffffff;
    --gray-800: #343a40;
    --gray-900: #212529;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--white) 100%);
    min-height: 100vh;
}

.register-container {
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px 20px;
}

.register-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    max-width: 900px;
    width: 100%;
    animation: slideInUp 0.5s ease;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 10px;
    font-size: 2rem;
}

.subtitle {
    text-align: center;
    color: #999;
    font-size: 0.95rem;
    margin-bottom: 30px;
}

/* Two Column Layout */
.two-column-layout {
    display: flex;
    gap: 30px;
    margin-bottom: 20px;
}

.left-column,
.right-column {
    flex: 1;
}

/* Form Groups */
.form-group {
    position: relative;
    margin-bottom: 25px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s;
    background: transparent;
    font-family: inherit;
}

.form-group label {
    position: absolute;
    left: 15px;
    top: 12px;
    color: #999;
    transition: all 0.3s;
    pointer-events: none;
    font-size: 14px;
}

.form-group input:focus,
.form-group input:valid,
.form-group textarea:focus,
.form-group textarea:valid {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 10px rgba(135, 188, 212, 0.2);
}

.form-group input:focus + label,
.form-group input:valid + label,
.form-group textarea:focus + label,
.form-group textarea:valid + label {
    top: -10px;
    left: 10px;
    font-size: 12px;
    background: var(--white);
    padding: 0 5px;
    color: var(--primary-color);
    font-weight: 600;
}

.password-group {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 15px;
    top: 12px;
    cursor: pointer;
    font-size: 20px;
    user-select: none;
}

.btn-save,
.btn-login {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
}

.btn-save:hover,
.btn-login:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(135, 188, 212, 0.3);
}

.login-link,
.register-link {
    text-align: center;
    margin-top: 20px;
    color: #666;
    font-size: 14px;
}

.login-link a,
.register-link a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.login-link a:hover,
.register-link a:hover {
    text-decoration: underline;
    color: var(--primary-dark);
}

.alert {
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
    animation: slideInDown 0.3s ease;
}

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

.alert-error {
    background-color: #fee;
    color: #c00;
    border-left: 4px solid #c00;
}

.alert-error a {
    color: #c00;
    text-decoration: underline;
    font-weight: bold;
}

.alert-error a:hover {
    color: #8b0000;
}

.alert-success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border-left: 4px solid #2e7d32;
}

.form-group small {
    display: block;
    font-size: 11px;
    color: #999;
    margin-top: 5px;
}

.error-message {
    color: #dc3545;
    font-size: 12px;
    margin-top: 5px;
}

.hidden {
    display: none;
}

.password-strength {
    margin-top: 5px;
    font-size: 12px;
}

.strength-weak { 
    color: #dc3545; 
}

.strength-medium { 
    color: #ffc107; 
}

.strength-strong { 
    color: #28a745; 
}

/* Responsive Design */
@media (max-width: 768px) {
    .register-container {
        padding: 80px 15px 15px;
    }

    .register-card {
        padding: 25px;
        border-radius: 15px;
        max-width: 500px;
    }

    h2 {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 0.85rem;
    }

    /* Stack columns on mobile */
    .two-column-layout {
        flex-direction: column;
        gap: 0;
    }
    
    .left-column,
    .right-column {
        width: 100%;
    }
}

/* Tablet Responsive */
@media (min-width: 769px) and (max-width: 1024px) {
    .register-card {
        max-width: 800px;
        padding: 35px;
    }
    
    .two-column-layout {
        gap: 20px;
    }
}

/* Loading state */
.btn-save:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

 /* Gender Radio Styles */
        .gender-group {
            margin-bottom: 20px;
            position: relative;
        }
        
        .gender-group label:not(.radio-label) {
            display: block;
            margin-bottom: 8px;
            font-size: 14px;
            font-weight: 500;
            color: #333;
        }
        
        .radio-container {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        
        .radio-option {
            display: flex;
            align-items: center;
            cursor: pointer;
            position: relative;
            padding-left: 28px;
            user-select: none;
        }
        
        .radio-option input[type="radio"] {
            position: absolute;
            opacity: 0;
            cursor: pointer;
        }
        
        .radio-custom {
            position: absolute;
            left: 0;
            height: 18px;
            width: 18px;
            background-color: #f5f5f5;
            border: 2px solid #ddd;
            border-radius: 50%;
            transition: all 0.2s ease;
        }
        
        .radio-option:hover .radio-custom {
            border-color: #4361ee;
        }
        
        .radio-option input[type="radio"]:checked ~ .radio-custom {
            background-color: #4361ee;
            border-color: #4361ee;
        }
        
        .radio-custom:after {
            content: "";
            position: absolute;
            display: none;
        }
        
        .radio-option input[type="radio"]:checked ~ .radio-custom:after {
            display: block;
        }
        
        .radio-option .radio-custom:after {
            left: 4px;
            top: 4px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: white;
        }
        
        .radio-label {
            font-size: 14px;
            color: #333;
            cursor: pointer;
        }
        
        /* Two column layout adjustments */
        .two-column-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-bottom: 20px;
        }
        
        @media (max-width: 768px) {
            .two-column-layout {
                grid-template-columns: 1fr;
                gap: 0;
            }
        }
        
        /* Form group spacing */
        .form-group {
            margin-bottom: 20px;
        }
        
        .error-message {
            color: #dc3545;
            font-size: 12px;
            margin-top: 5px;
        }
        
        .hidden {
            display: none;
        }
        
        .password-strength {
            margin-top: 5px;
            font-size: 12px;
        }