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

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

.auth-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    width: 100%;
    max-width: 400px;
    position: relative;
}

.auth-header {
    text-align: center;
    padding: 40px 30px 20px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.auth-title {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 8px;
}

.auth-subtitle {
    font-size: 14px;
    opacity: 0.9;
}

.form-container {
    padding: 30px;
}

.form-tabs {
    display: flex;
    margin-bottom: 30px;
    background: #f8f9fa;
    border-radius: 12px;
    padding: 4px;
}

.tab-btn {
    flex: 1;
    padding: 12px;
    background: none;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #6c757d;
}

.tab-btn.active {
    background: white;
    color: #667eea;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
    font-size: 14px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #fff;
}

.form-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.captcha-container {
    display: flex;
    gap: 12px;
    align-items: end;
}

.captcha-input {
    flex: 1;
}

.captcha-display {
    width: 100px;
    height: 44px;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border: 2px solid #e9ecef;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Courier New', monospace;
    font-size: 18px;
    font-weight: bold;
    color: #667eea;
    cursor: pointer;
    transition: all 0.3s ease;
    user-select: none;
}

.captcha-display:hover {
    background: linear-gradient(135deg, #e9ecef, #dee2e6);
    border-color: #667eea;
}

.form-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

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

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

.form-section {
    display: none;
}

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

.message {
    margin-top: 15px;
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    text-align: center;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.loading {
    opacity: 0.7;
    pointer-events: none;
}

@media (max-width: 480px) {
    .auth-container {
        margin: 10px;
    }
    
    .form-container {
        padding: 20px;
    }
}